Analizor Gaze - Manual

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GA3000PLUS Gas Analyser

Operating Manual

Geotechnical Instruments (UK) Ltd

Sovereign House

QueenswayLeamington Spa

Warwickshire

CV31 3JR

England

Tel: +44 (0)1926 338111

Fax: +44 (0)1926 3381110

Email:[email protected]

Website:www.geotechuk.com
mailto:[email protected]:[email protected]:[email protected]://www.geotech.co.uk/http://www.geotech.co.uk/http://www.geotech.co.uk/mailto:[email protected]


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Copyright 2012 Geotechnical Instruments (UK) Limited OMGA3KPLUS1.00

Table of Contents

1 Manual Guidelines ..........................................................................................7

1.1 Document History .......................................................................................... 7

1.2 Safety Symbol ................................................................................................ 7

1.3 Notes ............................................................................................................. 7

2 Introduction ....................................................................................................8

2.1 GA3000 PLUS Model Type Definitions ........................................................... 9

2.1.1 GA3KPLUS1........................................................................................... 9

2.1.2 GA3KPLUS2........................................................................................... 9

2.1.3 GA3KPLUS3......................................................................................... 10

2.1.4 GA3KPLUSC ........................................................................................ 10

2.1.5 GA3KPLUSD ........................................................................................ 11

2.2 Safety Instructions ....................................................................................... 12

2.3 ATEX Certification ........................................................................................ 13

2.4 Range of Environmental Conditions............................................................. 13

2.5 Safety Symbols Used on the GA3000 PLUS .................................................. 14

3 GA3000 PLUS Gas Analyser ............................................................................ 15

3.1 The GA3000 PLUS ........................................................................................ 15

3.1.1 Features ............................................................................................. 15

3.1.2 Benefits .............................................................................................. 16

3.1.3 Main Applications ............................................................................... 16

3.2 Instrument Components .............................................................................. 17

4 GA3000 PLUS Instrument Features ................................................................ 19

4.1 Physical Characteristics of the Gas Analyser ................................................ 19

4.2 Gas Analyser Definitions .............................................................................. 20

4.2.1 Front View .......................................................................................... 20

4.2.2 Rear View ........................................................................................... 21


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OMGA3KPLUS1.00 Copyright 2012 Geotechnical Instruments (UK) Limited

4.3 Instrument Connection Points ..................................................................... 22

4.3.1 Right Side View ................................................................................... 23

4.3.2 Left Side View ..................................................................................... 23

5 Installation .................................................................................................... 24

5.1 Pre-Installation Requirements ..................................................................... 24

5.1.1 General ............................................................................................... 24

5.1.2 Storage of the Gas Analyser................................................................ 24

5.1.3 Ventilation Requirements ................................................................... 24

5.2 Mounting the Cabinet .................................................................................. 25

5.3 External Customer Connections ................................................................... 26

5.4 Terminal Conductor Sizes ............................................................................ 28

5.5 Mains Wiring ............................................................................................... 28

5.5.1 Protective Earthing ............................................................................. 28

5.5.2 How to Wire the Mains Supply ........................................................... 29

5.6 Alarm, Fault and Sample Point Relays .......................................................... 30

5.6.1 Alarm Relays ....................................................................................... 30

5.6.2 Fault Relay .......................................................................................... 30

5.6.3 Sample Point Relays ........................................................................... 31

5.7 4-20mA Outputs .......................................................................................... 31

5.7.1 Wiring the GA3000 PLUS to Current Source Inputs........................... 32

5.7.2 Wiring the GA3000 PLUS to Current Sink Inputs ............................... 32

5.7.3 4-20mA Scaling ................................................................................... 36

5.8 Modbus Digital Output ................................................................................ 36

5.8.1 Wiring the GA3000 PLUS Modbus Outputs ......................................... 36

5.8.2 Configuration of the GA3000 PLUS Modbus Port ............................... 37

5.8.3 Readable Parameters of the GA3000 PLUS PLC .................................. 38

5.9 Connecting the Gas Lines to the GA3000 PLUS ............................................ 41

5.9.1 Sample Lines ....................................................................................... 41


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5.9.2 Air Purge Inlet..................................................................................... 42

5.9.3 Landfill Return .................................................................................... 42

5.9.4 Vent Atmosphere ............................................................................... 42

5.9.5 Drain ................................................................................................... 43

5.10 Final Checks ................................................................................................. 43

6 General Operational Instructions .................................................................. 45

6.1 Switching the Gas Analyser On .................................................................... 45

6.2 Power On Self Test (POST) ........................................................................... 45

6.3 First Time Run Set-up .................................................................................. 46

6.4 Instrument Main Read Screen ..................................................................... 50

6.4.1 General ............................................................................................... 50

6.4.2 Alarm Indications ............................................................................... 52

6.4.3 Fault Indication ................................................................................... 53

6.4.4 Service Overdue Indication ................................................................. 53

6.4.5 View Alarms ....................................................................................... 54

6.4.6 Pause Sampling .................................................................................. 55

6.5 Main Menu .................................................................................................. 58

6.5.1 Exit Menu and Resume Sampling ....................................................... 58

6.5.2 Alarm Set-up ...................................................................................... 58

6.5.3 User Calibration .................................................................................. 60

6.5.4 Set Instrument Time and Date ............................................................ 60

6.5.5 Sampling Options ............................................................................... 62

6.5.6 View Event Log ................................................................................... 63

6.5.7 Display Contrast ................................................................................. 64

6.5.8 System Information ............................................................................ 64

6.5.9 Administrator Passcode ...................................................................... 65

6.6 GA3000 PLUS Sampling Process ................................................................... 67

6.6.1 GA3KPLUS1......................................................................................... 67


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6.6.2 GA3KPLUS2 and GA3KPLUSD .............................................................. 67

6.6.3 GA3KPLUS3......................................................................................... 68

6.6.4 GA3KPLUSC ........................................................................................ 69

6.7 Switching the Gas Analyser Off .................................................................... 69

7 Calibration .................................................................................................... 70

7.1 Calibration Introduction .............................................................................. 70

7.2 Required Calibration Equipment .................................................................. 70

7.2.1 Gas ..................................................................................................... 70

7.2.2 Flow Regulator ................................................................................... 71

7.2.3 Set-up ................................................................................................. 72

7.3 Calibration Mixture Processes Best Practice ............................................. 73

7.3.1 Internal (CH4/CO2/O2/Internal Sensor) Calibration ............................. 73

7.3.2 External Sensor Calibration ................................................................ 75

7.4 Last Field Calibration ................................................................................... 77

8 Maintenance ................................................................................................. 78

8.1 GA3000 PLUS Consumable Products ............................................................ 79

8.2 Replacing the Coalescing (Catchpot) Filter ................................................... 81

8.3 Replacing the Water Trap Filter ................................................................... 82

8.4 Replacing the External Sensor ..................................................................... 83

8.5 Replacing the Inlet Port Filter ...................................................................... 84

8.6 Cleaning and Decontamination .................................................................... 85

9 Service .......................................................................................................... 86

9.1 General ........................................................................................................ 86

9.2 Replacement of Gas Analyser for Service Hot Swap .................................. 86

9.3 Sample Certificate of Calibration Page 1 ................................................... 88

9.4 Sample Certificate of Calibration Page 2 ................................................... 89

10 Problem Solving ............................................................................................ 90

10.1 Fault Detection ............................................................................................ 90


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10.1.1 Error, Warning and Fault Display ........................................................ 90

10.1.2 Types of Faults .................................................................................... 90

10.1.3 Fault Screens ...................................................................................... 92

10.1.4 Under and Over Range Codes ............................................................. 93

10.2 Instrument Lock-Up ..................................................................................... 93

10.3 Analogue Outputs not Working ................................................................... 94

10.4 Low Flow ..................................................................................................... 94

10.5 Fuses ........................................................................................................... 95

10.6 Cold Start ..................................................................................................... 96

10.7 Event Log ..................................................................................................... 97

11 Warranty Information ................................................................................. 101

12 WEEE Compliance ........................................................................................ 102

13 Declaration of Conformity English Language ............................................. 103

13.1 ATEX Directive 94/9/EC References ........................................................... 103

13.2 EMC Directive 89/336/EEC References ...................................................... 103

13.3 Low Voltage Directive References ............................................................. 103

14 Glossary of Terms ........................................................................................ 104


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7 GA3000 PLUS Gas Analyser Operating Manual

Manual Guidelines


1 Manual Guidelines1.1 Document HistoryIssued by Issue date

Change

control IDIssue No. Reason for change

C. Millar 06/09/2012 N/A 01 New document

1.2 Safety SymbolInformation in this manual that may affect the safety of users and others is

preceded by the following symbol:

Warning

Failure to follow this information may result in physical injury which in some

cases could be fatal.

1.3 NotesImportant /useful information and instructions are shown clearly throughout

the manual in a note format.

For example:

Note: For further information please contact technical support atGeotech on +44(0)1926 338111 or [email protected].
mailto:[email protected]:[email protected]:[email protected]:[email protected]


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GA3000 PLUS Gas Analyser Operating Manual 8

Introduction


2 IntroductionThis manual explains how to install and use the GA3000 PLUS range of gas

analysers for the following model types listed below:

GA3KPLUS1 Measures CH4, CO2 and O2 as standard from one gassample point.

GA3KPLUS2 Measures CH4, CO2 and O2 as standard from two gassample points.

GA3KPLUS3 Measures CH4, CO2 and O2 as standard from three gassample points.

Note: Each of the above variants can be fitted with up to two additionalgas sensors. For further information contact sales at Geotech on

+44(0)1926 338111 or [email protected].

GA3KPLUSC Measures CH4, CO2 and O2 continuously as standard fromone gas sample point.

Note: The above variant can be fitted with up to one additional gassensor. For further information contact sales at Geotech on +44(0)1926

338111 or [email protected].

GA3KPLUSD Measures CH4, CO2, O2 and high & low levels of H2S fromtwo gas sample points.

Note: The above variant is fitted with two additional H2S gas sensors. Forfurther information contact sales at Geotech on +44(0)1926 338111 or

[email protected].
mailto:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]


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Introduction


2.1 GA3000 PLUS Model Type Definitions2.1.1 GA3KPLUS1

The GA3KPLUS1 measures CH4, CO2 and O2 as standard with a choice ofup to two additional gases (one internal to the GA and one external) and

measures from one sample point.

It has user selectable sample and air purge intervals which are exhaustedback to the process and atmosphere respectively.

The 4-20mA and Modbus outputs are updated at the end of eachsample.

Following is a simple block diagram of the system including the optionalexternal gas sensor:

2.1.2 GA3KPLUS2 The GA3KPLUS2 measures CH4, CO2 and O2 as standard with a choice of

up to two additional gases (one internal to the GA and one external) and

measures from two sample points.





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Introduction


2.1.3 GA3KPLUS3 The GA3KPLUS3 measures CH4, CO2 and O2 as standard with a choice of

up to two additional gases (one internal to the GA and one external)from three sample points.




2.1.4 GA3KPLUSC The GA3KPLUSC measures CH4, CO2 and O2 as standard with a choice of

up to one additional gas (external to GA only) from one sample point.

It measures CH4, CO2 and O2 continuously which is exhausted back tothe process.

The external sensor has user selectable sample intervals which areexhausted back to the process. The external sensor cannot be subjected

to the gas stream continuously.

After each defined cycle the external sensor is subjected to a userdefinable air purge (minimum three minutes) which is exhausted to the

atmosphere.

The 4-20mA and Modbus outputs are updated continuously, with theexternal sensor data being refreshed at the end of each sample.

Following is two simple block diagrams of the system with one includingthe optional external gas sensor:


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Introduction


2.1.5 GA3KPLUSD The GA3KPLUSD measures CH4, CO2, O2 and high & low range H2S as

standard (high range internal to the GA and low range external) from

two sample points.


The system has a bypass solenoid in order to divert high levels of H2Sfrom the low range sensor, which will prolong its life.


Following is a simple block diagram of the system:

Note: Letters P, A, and R indicate tubing connection points to thesolenoids. These letters can be found on each solenoid within the

system.


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Introduction


2.2 Safety InstructionsWarning The GA3000 PLUS range of gas analysers can be used

for measuring gases in a wide range of environmentalapplications as described in this manual.

Inhaling toxic gases may be harmful to health and in

some cases may be fatal. It is the responsibility of the

user to ensure that he/she is adequately trained in the

safety aspects of the gases being used and appropriate

procedures are followed. In particular, where

hazardous gases are being used, the gas exhausted

from the analyser must be piped to an area where it issafe to discharge the gas, or returned to the process.

Hazardous gas can be expelled from the instrument,

including when purging with clean air.

The amount of sample gas that could be expelled

during an air purge is typically 50ml. If in any doubt

consult an appropriately qualified person about the

dangers of the gas you are measuring.

The equipment is only for use in ambient temperatures in the range 0Cto +50C and should not be used outside this range, unless the heater

option is purchased when the lower ambient temperature can be

extended to -20C.

The equipment is only for use in ambient pressures in the range 500 to1500 mbar and should not be used outside of this range.

The maximum surface temperature recorded during the ATEXassessment was 180C; this is from a component within the pumpassembly.

Installation should be carried out in accordance with the applicablecode of practice by suitably trained personnel.

Repair of this equipment should be carried out in accordance with theapplicable code of practice.

If the equipment is likely to come into contact with aggressivesubstances, e.g. acidic liquids or gases that may attack metals, or


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Introduction


solvents that may affect polymeric materials, then it is the

responsibility of the user to take suitable precautions, e.g. regular

checks as part of routine inspections or establishing from the materials

datasheet that it is resistant to specific chemicals that prevent it frombeing adversely affected, thus ensuring that the type of protection is

not compromised.

Warning When opening the cabinet great care must be taken by

the operator as mains voltages are present. It is the

responsibility of the user of the equipment to ensure

that all personnel are adequately trained.

Note: It is vital that the instructions in this operating manual arefollowed closely. Failure to comply could invalidate the ATEX

certification or cause injury to the user.

2.3 ATEX CertificationReference European ATEX Directive 94/9/EC

The GA3000 PLUS gas analyser has been certified to hazardous area

classification and is ATEX certified according to the following designation:

II 3 G Ex nA IIA T1 Gc (-20C Ta +50C)

It is the responsibility of the user to determine the protection concept and

classification for a particular application.

Note: For further information please contact technical support atGeotech on +44(0)1926 338111 or [email protected].

Warning When opening the cabinet great care must be taken by

the operator as mains voltages are present. It is the

responsibility of the user of the equipment to ensure

that all personnel are adequately trained.

2.4 Range of Environmental ConditionsThe GA3000 PLUS is designed for use outdoors and has an IP65 rating. The

operating temperature range is 0C to +50C without the use of the Geotechapproved ATEX certified heater, and -20C to +50C with the use of the


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Introduction


Geotech approved ATEX certified heater. The mains voltage (110-240V) can

fluctuate up to 10% of the nominal voltage.

2.5 Safety Symbols Used on the GA3000 PLUSThe following safety symbols are used on the GA3000 PLUS range of gas

analysers:

Earth (ground) Terminal

Protective Conductor Terminal

Caution, risk of electric shock

Caution, risk of danger


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GA3000 PLUS Gas Analyser


3 GA3000 PLUS Gas Analyser3.1 The GA3000 PLUS

The GA3000 PLUS range of gas analysers builds on field-proven gas analysis

technology to offer effective online monitoring with local data outputs.

3.1.1 Features CH4, CO2 and O2 standard measurement Optional H2S, H2 and CO measurement (choice of up to two additional

gases)

Multi-point sampling (up to 3 gas sample points) H2S ranges from 0-50ppm to 0-10,000ppm Monitor before and after desulphurisation Continuous monitoring option Clean air purge Large and clear back-lit display Four 4-20mA outputs Modbus communication Gas return to process as standard IP65 rated stainless steel enclosure


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ATEX certified for use in Zone 2 areas3.1.2 Benefits

No training required Low cost of ownership Calibration accredited to ISO 17025 (applies to CH4, CO2, and non-

continuous O2 only)

Quick and easy self-installation Compact self-contained system Moisture removal included as standard Zero service downtime Clear servicing schedules Field-proven equipment Start-up configuration wizard Simple user calibration

3.1.3 Main Applications Landfill and biogas Anaerobic digestion projects

o Waste water treatmento Food processing plantso Food and animal waste

Clean development mechanism (CDM)


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3.2 Instrument Components

Diagram 1 GA3KPLUS instrument components

A Gas analyser H Heater thermostat

B Solenoids I Mains input

C Pump J Modbus terminals

D External sensor K 4-20mA terminals

E Fuses L Gas in/out and drain valvesF Catchpot M Inline coupling

G Alarm/fault/solenoid relays N Calibration valve

B

G

C

H

KJI

E

D

A

F

L

M

N


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Diagram 2 - GA3KPLUS3 inside of door

O Viewing window

P Insulation (when heater installed, also fitted to main enclosure)

Q Heater

O

P

Q


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GA3000 PLUS Instrument Features


4 GA3000 PLUS Instrument Features4.1 Physical Characteristics of the Gas AnalyserFront view: Reference:

A Main gas read screen

B Key 2, scroll up

C Key 4, scroll left

D Key 8, scroll down

E Key 0

F Key 6, scroll right

G On/off key

H Enter key

I General operational keys

J Backspace/delete key

K Instrument label

Rear view: Reference:

L Inlet port filter

M Serial number

N Product option number

A

B

C

D

E

F

G

H

I

J

K

L

M N


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4.2 Gas Analyser Definitions4.2.1 Front View

Reference DefinitionA Main read screen Start and end screen when using the

instrument

B Key 2, scroll up Press scroll up to display more information.

Also key 2.

C Key 4, scroll left Press scroll left to display more information.

Also key 4.

D Key 8, scroll down Press scroll down to display more

information. Also key 8.

E Key 0 Key 0. (Note backlight is always on and

cannot be turned off).

F Key 6, scroll right Press scroll right to display more information.

Also key 6.

G On/off key Hold the on/off key for two seconds to turn

the gas analyser on and off

H Enter key The enter key accepts/confirms choices

made by the operator for various functions

and operations. Also required to confirm

numeric data entry and enable edit mode in

certain menu options.

I General operational keys Keys 1, 2, 3, 4, 5, 6, 7, 8, 9, 0

J Backspace/delete key Can be used to delete an entry. (Note the

pump cannot be controlled by this button).

K Instrument label Instrument product label


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4.2.2 Rear ViewReference Definition

L Inlet port filter The inlet port filter acts as a particulate filter.

The grey cover houses and protects the inlet

port filter.

M Serial number Unique identification number for the gas

analyser.

N Product option number Records gas analyser internal configuration at

the time of manufacture, e.g. FG3KPLUS0


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4.3 Instrument Connection PointsRight side view: Reference:

A Inlet port

B Unused port

Left side view: Reference:

C Gas outlet port

D Connector D

E Connector E

A

B

C

D

E


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4.3.1 Right Side ViewReference Definition

A Inlet port The sample tube is attached to this port for

the gas analyser to take a reading.

B Unused port This port is not used on the GA3000 PLUS.

4.3.2 Left Side ViewReference Definition

C Gas outlet port The sample tube is attached to this port to

allow the gas analyser to take a gas reading.

D Connector D

(Half-moon)

Communications port used to connect the

gas analyser to the PLC.

E Connector E Used to connect the gas analyser to the 9V

external supply.


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Installation


5 Installation5.1 Pre-Installation Requirements5.1.1 GeneralIn order to effectively install the GA3000 PLUS system it is important that the

site is ready and in a fit state. In particular, the following points should be

noted:

A suitable mains supply as detailed in this manual is installed. A suitable location is determined for the installation of the

instrumentation. There are no health and safety problems on site a risk assessment may

be required.

All required gas lines are installed. The GA3000 PLUS system has been received on site, unpacked and

checked for obvious damage.

4 20mA/Modbus cable has been installed to the instrument location. Note: Failure to comply with any of the above may result in additional

time on site and additional costs.

Warning Power should NOT be applied before all plumbing and

wiring has been completed and tested.

5.1.2 Storage of the Gas AnalyserThe analyser should not be exposed to extremes of temperature. It is the

users responsibility to ensure the instrument is kept within its ambient

operating temperature range.

5.1.3 Ventilation RequirementsThere is a breather fitted to the GA3000 PLUS situated at the bottom of the

enclosure (see annotation B onDiagram 4 - GA3000 PLUS connection points).

It is the users responsibility to ensure there is a free circulation of air around

the cabinet.


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Installation


5.2 Mounting the CabinetThe system is contained in one cabinet. The cabinet is weatherproof with a

rating to IP65. The cabinet must be fixed to a suitable wall or frameworkcapable of holding the weight of the system.

Although the cabinet is weatherproof, consideration should be given to

mounting it in an area that is protected from the worst of the weather. For

example, maintenance of the analyser will be made easier if it is not exposed

to driving rain. Positioning the cabinet in direct sunlight in hot countries should

be avoided (where possible) as this may increase the internal temperature of

the cabinet.

The weight of the cabinet and contents will depend on the options that are

fitted, but will be approximately 36 kg; it is therefore recommended that the

installation is undertaken by a minimum of two people.

Four mounting fixings are supplied and fitted to each corner of the GA3000

PLUS. Suitable nut & bolt or raw bolt arrangements will have to be defined by

the operator for fixing to the wall or framework (it is recommended that these

are stainless steel). Dimensions of the cabinet are provided in diagram 3

below:


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Installation


Diagram 3 - Enclosure wall mounting bracket dimensions

5.3 External Customer ConnectionsPart of the installation will require the operator to connect a mains cable,

output cables and gas pipes to the equipment. Diagram 4 below identifies the

available connection points on the GA3000 PLUS:

Diagram 4 - GA3000 PLUS connection points

A Customer cable entry E Landfill return

B Breather F Gas sample in

C Air purge in G Vent atmosphere

D Drain


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Installation


Note: The user must remove an M20 stopping plug from annotation Awhere they plan to place a cable gland. The remaining M20 stopping

plugs must remain in place if the holes are unused in order to maintain

the IP rating of the enclosure.

Warning The mains and output cables must enter the cabinet by

armoured cable via a metal Ex e cable gland and the

mains supply should be isolated.


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Installation


5.4 Terminal Conductor SizesFor the mains, 4 20mA, Modbus and relay terminals the conductor size must

be as in the table below:

Conductor type Allowed conductor size

(mm2)

Solid H07V-U mm2

0.5 4

Stranded H07V-R mm2 1.5 4

Flexible H07V-K mm2 0.5 4

Flexible H07V-K and AEH DIN 46 228/1 mm2 0.5 2.5

Flexible H07V-K and AEH with plastic

insulation collar mm2

0.5 2.5

Warning The use of conductors outside of the specification will

affect the safety and ATEX certification of the

apparatus

5.5 Mains Wiring5.5.1 Protective EarthingThe safety of the equipment depends on there being effective earthing of the

apparatus via a mains supply.

The mains requirement for the system is:

Type AC

Voltage 100 250VAC

Frequency 50/60Hz

Current 3A

The fuse rating is 3.15A.

The mains cable must enter the cabinet via a metal Ex e cable gland and

armoured cable through one of the three available customer cable entry

points (refer to annotation A onDiagram 4 - GA3000 PLUS connection points).

Warning Use of a non EX e gland will invalidate the ATEX

certification.


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Installation


Failure to use armoured cable will invalidate the ATEX

certification.

This equipment must be provided with a switched andfused mains supply. The switch must be mounted close

to the equipment and clearly identified as the

disconnecting device for the equipment.

Failure to connect a suitable earth to the analyser could

result in serious injury.

5.5.2 How to Wire the Mains SupplyRefer to annotation I onDiagram 1 GA3KPLUS instrument componentsfor

the location of the mains wiring terminals, and diagram 5 below for the mains

wiring diagram:

Diagram 5 - Mains wiring diagram

Note: For terminal conductor sizes please refer to sectionTerminalConductor Sizes


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Installation


5.6 Alarm, Fault and Sample Point RelaysDependent upon the model chosen at point of manufacture, the GA3000 PLUS

will have the following available relays (refer to annotation G onDiagram 1GA3KPLUS instrument componentsfor relay location):

Model Available Relays

GA3KPLUS1 Sample 1

Alarm 1

Alarm 2

Fault

GA3KPLUS2 Sample 1

Sample 2Air

Fault

GA3KPLUS3 Sample 1

Sample 2

Sample 3

Air

Fault

GA3KPLUSC Alarm 1

Alarm 2

Fault

GA3KPLUSD As per GA3KPLUS2

5.6.1 Alarm RelaysAlarm relays are only available on a single sample point system. The relays are

volt free change-over contacts. The maximum rated voltage is 240V.

The relays operate in a fail safe mode, i.e. normally energised. This means

wiring across connections 11 and 12 during an alarm condition will complete

the circuit (de-energising the relay). Refer toDiagram 6 - Relay wiring diagram

in non-energised statefor a relay wiring diagram.

5.6.2 Fault RelayThe fault relay is available on all systems. The relays are volt free change-over

contacts. The maximum rated voltage is 240V.


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Installation


The relays operate in a fail safe mode, i.e. normally energised. This means

wiring across connections 11 and 12 during a fault alarm condition will

complete the circuit (de-energising the relay). Refer toDiagram 6 - Relay wiring

diagram in non-energised statefor a relay wiring diagram.

5.6.3 Sample Point RelaysThe sample point relays are available on all systems except for the GA3KPLUSC

(this is because it is monitoring all of the time). The sample point relays should

be used as an indication as to which sample point the GA3000 PLUS is

monitoring.

The relays are volt free change-over contacts. The maximum rated voltage is240V. The relays operate by energising when the particular sample point is

being monitored and thus the 4-20mA and Modbus outputs should be read

when the solenoid changes state from energised to de-energised. Refer to

Diagram 6 - Relay wiring diagram in non-energised statefor a relay wiring

diagram:

Diagram 6 - Relay wiring diagram in non-energised state


5.7 4-20mA OutputsIf analogue outputs are being used the cable must enter the cabinet via a

metal Ex e cable gland and armoured cable through one of the three available

customer cable entry points (refer to annotation A onDiagram 1 GA3KPLUS

instrument components).

The outputs current sink in to the GA3000 PLUS. Labels identify the

appropriate outputs namely from left to right (1, 2, 3 and 4). Refer to


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Installation


annotation K onDiagram 1 GA3KPLUS instrument componentsfor the 4-

20mA terminal locations.

It is important for the user to understand the analogue inputs on their loggingsystem There are two typescurrent sink and current source.

5.7.1 Wiring the GA3000 PLUS to Current Source InputsWire the outputs in accordance withWiring Diagram 1 Wiring to current sink

inputs, for optimum performance it is recommended that screened twisted

pair cable is used.

Warning For this method the operating voltage input in to the

GA3000 PLUS must not exceed 30V. Operating outside

of this value will affect the safety and ATEX certification

of the apparatus.


5.7.2 Wiring the GA3000 PLUS to Current Sink InputsWhen wiring the GA3000 PLUS to current sink inputs, loop powered isolators

must be used to convert the signal. Wire the outputs in accordance with

Wiring Diagram 2 Wiring to current sink inputsusing the recommended loop

isolator. For optimum performance it is recommended that screened twisted

pair cable is used.

Warning For this method there are two recommended loop

powered isolators:

1) Lutze WPAA 7-05262) SEM1000

Using loop powered isolators that have not been

recommended by the manufacturer will affect the

safety and ATEX certification of the apparatus.

Note: If isolation is important and the current source input method isrequired the loop powered isolators can still be used, but in an

alternative wiring arrangement. For further information please contact


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Installation


technical support at Geotech on +44(0)1926 338111 or email

[email protected].

mailto:[email protected]:[email protected]:[email protected]


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Installation


Wiring Diagram 1 Wiring to current sink inputs


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Installation


Wiring Diagram 2 Wiring to current sink inputs


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Installation


5.7.3 4-20mA ScalingThe following table details the scaling on the 4-20mA channels:

Gas 4mA Reading 20mA ReadingCH4 0.0% 100.0%

CO2 0.0% 100.0%

O2 0.0% 25.0%

H2S 0-50ppm 0ppm 50ppm


H2S 0-500pm 0ppm 500ppm



H2S 0-10000ppm 0ppm 10000ppm

H2 0-1000ppm 0ppm 1000ppm

CO 0-1000ppm 0ppm 1000ppm

5.8 Modbus Digital OutputIf Modbus digital outputs are being used, the cable must enter the cabinet via

a metal Ex e cable gland and armoured cable through one of the three

available customer cable entry points (refer to annotation A onDiagram 4 -

GA3000 PLUS connection points).

Labels identify the appropriate outputs, namely from left to right +, - and LG.

Refer to annotation J onDiagram 1 GA3KPLUS instrument componentsfor

the Modbus terminal locations.

Warning The GA3000 PLUS Modbus terminals must only be used

for standard Modbus communications; no other

connections must be made. Connections outside of this

could affect the safety and ATEX certification of the

apparatus.

5.8.1 Wiring the GA3000 PLUS Modbus OutputsWire the outputs in accordance withWiring Diagram 3 Wiring to Modbus

inputs. For optimum performance it is recommended that screened twisted

pair cable is used.


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Installation



When wiring the outputs the twisted pairs must be as follows:

Terminal Colour Wiring Information

Orange Signal A (RS485) +

Blue Signal B (RS485) -

White Logic Ground (0V) LG

Warning The input voltage range to the GA3000 PLUS Modbus

terminals must not exceed -7 to +12V. Operating

outside of this range could affect the safety and ATEX

certification of the apparatus.

5.8.2 Configuration of the GA3000 PLUS Modbus PortThe GA3000 PLUS Modbus port has been configured as follows:

Node Address 1

Baud Rate 38400

Parity Odd

Stop Bits 1

The PLC acts as a slave.

The protocol is MODBUS RTU.

Note: A termination resistance of 200 ohms is fitted between thepositive and negative terminals of the GA3000 PLUS and thus must be

the last connection on the bus. Similarly the first device on the bus

should have a termination resistor.


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Installation


5.8.3 Readable Parameters of the GA3000 PLUS PLCBelow is a table of addresses that can be read from the GA3000 PLUS PLC:

Single 16-bit Registers:

PLC Internal

Name

Type Modbus

(Hex)

Modbus

(984)

Parameter

DS100 INT 63H 400100 Last reading: YearDS101 INT 64H 400101 MonthDS102 INT 65H 400102 DayDS103 INT 66H 400103 HourDS104 INT 67H 400104 MinuteDS105 INT 68H 400105 SecondDS107 INT 6AH 400107 Sample Point 1: CH4 Reading x 10DS108 INT 6BH 400108 CO2 x 10DS109 INT 6CH 400109 O2 x 10DS110 INT 6DH 400110 INT CELL 1 (not currently supported)DS111 INT 6EH 400111 INT CELL 2DS112 INT 6FH 400112 INT CELL 3 (not currently supported)DS113 INT 70H 400113 EXT CELL 1DS114 INT 71H 400114 EXT CELL 2 (not currently supported)DS115 INT 72H 400115 Sample Point 2: CH4 Reading x 10

Repeats as per sample point 1DS123 INT 7aH 400123 Sample Point 3: CH4 Reading x 10

Repeats as per sample point 1Readings stored in two 16-bit registers as a single precision real/floating point

number:

PLC Internal

Name

Type Modbus

(Hex)

Modbus

(984)

Parameter

DF50 FLOAT 7062H 428771 Sample Point 1: CH4 readingDF51 FLOAT 7064H 428773 CO2DF52 FLOAT 7066H 428775 O2


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Installation


DF53 FLOAT 7068H 428777 INT CELL 1 (not currentlysupported)

DF54 FLOAT 706aH 428779 INT CELL 2DF55 FLOAT 706cH 428781 INT CELL 3 (not currently

supported)DF56 FLOAT 706eH 428783 EXT CELL 1DF57 FLOAT 7070H 428785 EXT CELL 2 (not currently

supported)DF58 FLOAT 7072H 428787 Sample Point 2

Repeats as per sample point 1DF66 FLOAT 7082H 428803 Sample Point 3

Repeats as per sample point 1

Note: Floating point numbers, consist of two 16 bit words to give a 32 bitsingle precision floating point number. The first word (e.g. 428771) holds

the sign in bit 15, the exponent in bits 14-7, part of the mantissa in bits

6-0. The remaining part of the mantissa is in the next register (e.g.

428772) bits 15 0.


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Installation


Wiring Diagram 3 Wiring to Modbus inputs


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Installation


5.9 Connecting the Gas Lines to the GA3000 PLUS5.9.1 Sample Lines

The sample should be taken and returned to suitable locations at therequired monitoring point. It is recommended that a valve is

incorporated in the assembly so that the gas can be shut off if the

sample line is removed. SeeImage 1 - Inline ball valve on sample pipe:

Image 1 - Inline ball valve on sample pipe

The line should connect to the upper surface of a horizontal pipe or on avertical standing pipe. This will prevent excessive amounts of water

entering the sample line.

The gas connections on the analyser (refer to annotation F onDiagram 4- GA3000 PLUS connection points) are 6mm stainless steel bulkhead

connectors, suitable for 6mm o/d stainless steel tubing.

The sample tube should be connected to the bulkhead connectorslabelled sample gas 1, sample gas 2 and sample gas 3, whereapplicable.

Ensure all tube connections are tight and free from leaks.5.9.1.1 Sample Gas ConditioningCare should be taken in routing the sample line, especially in cold

environments. The sample line may need insulating or even trace heat to

prevent freezing of water within the pipe. This is not part of the GA3000 PLUS

range and is the responsibility of the operator.


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Installation


The system incorporates a catchpot for removal of liquid and filters to help

prevent water from entering the analyser. However, additional water filtering

may be required where the sample is heavily contaminated with water.

5.9.2 Air Purge Inlet The air purge inlet requires uncontaminated air for the purge line. If uncontaminated air cannot be guaranteed at the location of the

analyser, a pipe should be connected to the air purge inlet (refer to

annotation C onDiagram 4 - GA3000 PLUS connection points) and

terminated at a point where uncontaminated air is present.

The connection on the cabinet is a BSP female bulkhead.

It is recommended that the supplied particulate filter (Geotech partnumber 2008277, see sectionGA3000 PLUS Consumable Products) is

fitted to the air purge inlet bulkhead prior to use of the system.

Ensure all tube connections are tight and free from leaks.5.9.3 Landfill Return

This line is where the measured gas from the gas analyser is exhausted.It can be returned to the process (recommended) or vented toatmosphere.

The sample gas returning to the process line should be connected to thebulkhead connector labelled landfill return.

If the sample gas is being vented to atmosphere it should be run to aposition where it is safe to do so.

The gas connection on the analyser (refer to annotation E onDiagram 4 -GA3000 PLUS connection points) is a 6mm stainless steel bulkhead

connector, suitable for 6mm o/d stainless steel tubing.

5.9.4 Vent Atmosphere This line is only used on systems with an air purge. During an air purge air is vented from this line, meaning it can be left

open to atmosphere.

If the GA3000 PLUS is being installed inside a building it is recommendedthat this line is vented to a safe area away from users.


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Installation


The connection on the analyser (refer to annotation G onDiagram 4 -GA3000 PLUS connection points) is a 6mm stainless steel bulkhead

connector, suitable for 6mm o/d stainless steel tubing.

Warning When performing an air purge the gas that was

previously sampled will be vented to atmosphere for a

short period of time, typically 10 seconds. This equates

to approximately 50ml of gas per air purge.

5.9.5 Drain The drain line should be run to a position where it is safe to discharge

the small amount of water that is removed from the sample gas.

Periodic inspection of the catchpot is required to check if water has beencollected. To drain the water, pause the system (please refer to section

Pause Sampling), close the sample valve(s) (refer to annotation L on

Diagram 1 GA3KPLUS instrument components) to the horizontal

position and open the drain valve (refer to annotation L onDiagram 1

GA3KPLUS instrument components) to the vertical position.

After the liquid has drained close the drain valve, open the samplevalve(s) and resume monitoring.

The connection is a BSP female bulkhead.Warning Dependent upon the application the water/liquid that

is removed may be contaminated.

Note: This line may also vent sample gas for a brief period during eachdraining operation if the sample inlet valves are not closed.

5.10 Final ChecksEnsuring the sample valves are open (refer to annotation L onDiagram 1

GA3KPLUS instrument components, these must be in the vertical

position) and the catchpot drain closed (refer to annotation L on

Diagram 1 GA3KPLUS instrument components, these must be in the

horizontal position), power up the system.

Five seconds after power is applied the gas analyser should start-up,displaying the logo and power-on self-test message.


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Installation


The first time the gas analyser is started after the self-test hassuccessfully completed, the first time run set-up wizard will begin

please refer to sectionFirst Time Run Set-upin this manual for details of

this process.

It is strongly recommended that a known concentration of gas is passedthrough the gas analyser to ensure that the system is still reading

accurately following installation.

For further information please contact technical support at Geotech on+44(0)1926 338111 or [email protected].


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General Operational Instructions


6 General Operational Instructions6.1 Switching the Gas Analyser On

1) The instrument will automatically turn on five seconds after power isconnected. If not, check the connections and press the on/off key. A

long beep will be emitted followed by the GA3000 PLUS logo display.

2) The power on selftest will then commence. Refer to the messageperforming power-on self-test at the bottom of the analyser read

screen, seeScreen 1- Power on .

Screen 1- Power on self test

6.2 Power On Self Test (POST)When switched on the gas analyser will perform a pre-determined self-test

sequence taking approximately sixty seconds. The logo remains on screen until

the POST has finished. Performing Power-On Self Test is displayed on the

bottom line.

During this time many of the gas analysers functions are tested, including:

Testing of the CH4, CO2, O2, reference, barometer, internal cell andtransducers is performed continuously over a short period of time to

check for faults and instability.

The pump is switched on, and the system checked for blockages. The time and date is checked. The next service due date is checked. Valid communications to the PLCs is checked. Test whether the first time run set-up is required.


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Note: After completion the logo screen is removed. If any failures occurthen the self test summary screen is shown. The self-test will

automatically reattempt every five minutes up to three times. If no

faults are found then the first time set-up or monitoring will begin. After

three failed attempts user intervention is required, however the self test

will retest every 24 hours for a further three times.

Note: If the fault is service overdue or invalid time, then the user cancontinue to the next stage by pressing key 1. The GA3000 PLUS will

continue automatically after thirty seconds if key 1 is not pressed.

6.3 First Time Run Set-up1) When switching on the gas analyser for the first time the instrument will

detect the first run conditions and run set-up mode. The GA3000 PLUS is

designed to be fully configurable by the end-user without Geotech

support or configuration.

2) The following screens are shown in this order:

Screen 2 - First time set-up introduction

3) Press the Enter key to continue.4) Set the instrument time and date. For more information about this

screen refer to section

5) Set Instrument Time and Datein this operating manual.


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Screen 3 - Instrument time and date set-up

6) Configure your sample intervals for the various sample points. For moreinformation about this screen refer to section


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8) Sampling Options in this operating manual.

Screen 4 - Sampling options set-up

Note: On the GA3KPLUSC without an external sensor this screen is notpresent. On the GA3KPLUSC with an external sensor this screen is for the

external sensor sampling option only as the gas analyser measures

continuously.

9) Configure alarm levels (this option can be skipped). For moreinformation about this screen refer to sectionAlarm Set-upin this

operating manual.

Screen 5 - Alarm set-up

Note: Alarms are only available on single sample point systems. For twoand three sample point systems this screen will not be present.

10)Configure 4-20mA output selection (allows you to choose which gas isoutput on which available channel) and safe values (outputs a fixed 4-

20mA and Modbus signal for each available channel so maintenance can


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be performed on the system without disturbing the process). For more

information about this screen refer to sectionSafe Value and Analogue

Set-upin this operating manual.

Screen 6 - Analogue output and safe value set-up

Note: There are only four analogue output channels available. Thereforeon a five gas system one gas must be compromised for the 4-20mA

channels or alternatively the Modbus outputs used.

11)Define whether an administrator passcode is required on the system.For more information on this screen refer to sectionAdministrator

Passcodein this operating manual.

Screen 7 - Administrator passcode set-up

12)Once the first time run set-up is complete, monitoring will begin after awarm-up period of approximately sixty seconds.


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6.4 Instrument Main Read Screen6.4.1 GeneralThe main gas read screen is considered to be the normal operating screenand all options are carried out from this starting point. An example screen is

shown in the following screenshot.

Screen 8 - Main read screen

Note: The actual data shown on this display will depend on the versionof the system and the option(s) that were selected at the point of sale.

A

B

C

D

E

F

G

H

K

J

I


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Reference Definition

A Time and date Displays the time and date which is updated

continuously.

B Sampling Defines the current status of the overall

sampling process.

C This SP Defines the current sample point being

monitored.

D Duration Is the time remaining for the current

sampling process (see reference B). If the

system is a GA3KPLUSC this is relating to theexternal sensor.

E Cycle Is the time remaining for the overall sample

process. If the system is a GA3KPLUSC this is

relating to the external sensor.

F Flow Is the flow rate of the system pump in

ml/min.

G Use arrow keys to view

sample point

Using the scroll keys allows you to view the

previous sample points data.

H Menu Pressing key 1 brings up the menu.

Monitoring will continue whilst the menu is

displayed.

I Pause sampling Pauses the sampling process so maintenanceand can be performed.

J Gases Displays the gas reading for the available

channels. This is dependent upon the sample

point (annotation K) setting. In live mode

these readings are updated every 10-15

seconds.

K Sample point Defines the current display mode for the


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gases:

Live = gas readings currently beingtaken from the current sample point

(annotation C). This is refreshed every10-15 seconds.

1, 2, 3 = the last data that was outputon the 4-20mA & Modbus channels for

the particular sample point selected.

6.4.1.1 External Sensor If fitted, the external sensor is the bottom gas displayed on the main

read screen.

If fitted, the external sensor will be sampled when the gas analyser issampling gas.

On a GA3KPLUSC system the external sensor is sampled periodicallybecause the sensor needs to be purged with air.

On a GA3KPLUSC system the duration and cycle is referring to theexternal sensor timings as the gas analyser is operating continuously.

Note: The lifespan of the sensor can be prolonged by subjecting it toshorter sample durations and longer air purges. The typical lifespan forelectrochemical sensors is 18 months in air, and this can be greatly

reduced if it is subjected to high concentrations of gases for long periods

of times.

6.4.2 Alarm Indications Alarms are only available on single sample point systems. A flashing bell next a channel indicates it is exceeding the alarm

condition.

An audible warning from the gas analyser will accompany the alarm,however this will not be audible with the main cabinet door closed.

A static bell symbol indicates that the channel is between the recoveryvalue and the trigger value.

L indicates that the alarm is, or was, active and is latched until the userclears/acknowledges it.


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D indicates that the alarm has been disabled by the user. A disabledalarm causes the associated relay to be re-energised.

When an alarm is active the option for view alarms can be accessed bypressing key 3. SeeScreen 9 - Alarm indication:

Screen 9 - Alarm indication

6.4.3 Fault IndicationRefer to theFault Detectionsection in this operating manual.

6.4.4 Service Overdue IndicationWhen the gas analyser is overdue a service, the following message will appear

on the analysers screen:

Screen 10 - Service overdue message

During this time the gas analyser will continue to monitor as normal.

It is recommended that the user returns the gas analyser to the manufacturer

for a full service and calibration when this screen appears, refer to theService

section in this operating manual for further information.


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Alternatively, the user can acknowledge this message simply by clicking key 1

and the message will re-appear in 28 days. This allows the user to return the

gas analyser for service at a more convenient time.

The service message cannot be turned off.6.4.5 View Alarms

As mentioned in theAlarm Indicationssection, when the GA3000 PLUS isalarming the user can view the alarm by pressing key 3.

Pressing this will take them to a new screen which can be seen inScreen11 - View alarms.

Selecting key 1 will exit the screen and return to the previous screen. If there is more than one alarm pressing key 3 will move to the next

alarm.

Selecting key 5 will disable the alarm until it is manually enabled by theuser or the alarm condition clears.

To permanently disable the alarm features refer to theAlarm Set-upsection in this operating manual.

For latched alarms that are no longer active, key 7 will be available toclear the alarm. This will re-energise the alarm relay.

Note: If during an alarm condition there is an instrument fault, the viewfault will take precedence over view alarms.

Screen 11 - View alarms


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Note: The view alarm function is only available in single sample pointsystems.

6.4.6 Pause Sampling Selecting key 5 from the main read screen will pause the system

sampling process.

In addition, the 4-20mA and Modbus outputs are frozen to their lastknown value.

This option can be used when maintenance is required on the plantequipment and will stop unnecessary and false alarms from occurring.

Selecting this option causes the sampling to stop until the user manuallyresumes the operation (pressing key 1 to resume).

Pressing key 3 in this screen will set the 4-20mA and Modbus outputsto the pre-set safe values (refer to theSafe Value and Analogue Set-up

section in this operating manual for further information).

When sampling is paused the following screen is displayed:

Screen 12 - Pause sampling screen

6.4.6.1 Safe Values Safe values allow the user to set the 4-20mA and Modbus outputs to

pre-set values.

This is suitable to prevent erroneous errors or alarm conditions in theusers remote system(s) whilst maintenance is being performed on the

GA3000 PLUS or any other plant equipment.


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The safe values currently pre-set within the system can be seen in thebottom section of the pause sampling screen, seeScreen 12 - Pause

sampling screen.

The safe values can be edited from the pause screen by selecting key 5.This takes you to the safe value and analogue setup screen. Refer to

theSafe Value and Analogue Set-upsection in this operating manual for

information on how to edit the values.

6.4.6.1.1 Safe Value and Analogue Set-upThe safe value and analogue set-up allows the user to define the analogue

outputs for the measured gas and the safe values to be output when sampling

is paused. The screen can be seen in the following image:

Screen 13 - Safe value and analogue output set-up

1) From the pause sampling screen press key 5 to enter the safe value andanalogue set-up screen.

2) Select key 7 to edit settings the CH4 output will become highlighted.3) Using the scroll keys choose the required field that needs editing and

select using the enter key.

Edit 4-20mA Output Channels

4) A list of five options will be displayed. The user can select which outputchannel they would like the selected gas to be assigned to. See following

Screen 14 - Edit gas 4-20mA output channel.


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Screen 14 - Edit gas 4-20mA output channel

5) Using the scroll keys choose the required output channel for the gas andselect using the enter key.

Note: There are only four available analogue output channels. Thereforeon a five gas system, one gas must be set to not from the options list.

6) Once complete, press key 7 to save changes.Edit Safe Reading

7) When attempting to edit the safe reading, a ? will become available onthe selected gas channel. See the following screen:

Screen 15 - Edit safe reading

8) Type in the required value to be output on the 4-20mA and Modbuschannel when in fault or pause sampling mode and store with the enter

key.

Note: The value entered here is the channels reading in percent or ppmas appropriate.


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9) Once complete, press key 7 to save changes.6.5 Main MenuThe main menu enables the operator to select options to set-up specific

parameters and perform operational tasks. The main menu can be seen in

Screen 16 - Main menu:

Screen 16 - Main menu

The main menu can be accessed from the main read screen by pressingkey 1.

Options can be selected by pressing the relevant option number on thegas analyser keypad.

Note: The keyboard is scanned continuously. The menu is displayed forthirty seconds and if no options are chosen the main read screen will

reappear.

6.5.1

Exit Menu and Resume SamplingBy pressing key 1 the user will exit from the main menu and return the main

read screen.

6.5.2 Alarm Set-up Note: Alarm set-up is only available on single sample point systems.

The system has two relay outputs available for alarm purposes.


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1) From the main menu press key 2 to enter the alarm set-up screen, asshown inScreen 5 - Alarm set-up.

2) Select key 7 to edit settings the channel 1 gas will becomehighlighted.

3) Once in edit mode the following keys become available:a. Key 3 becomes available to enable or disable the alarm and relay.b. Key 7 becomes available to save and exit.c. Key 1 becomes available to cancel.

4) Press the enter key to edit the channel, a list of gases will be providedas displayed inScreen 17 - Edit alarm channel:

Screen 17 - Edit alarm channel

5) Choose the required gas (e.g. H2S) by using the enter key.6) Each alarm relay can be configured independently. For each relay the

following parameters can be specified by using the enter key to edit:

a. Gas channelb. Trigger direction (above or below the specified value)c. Trigger valued. Mode (latching or normal)e. Recovery value

7) Pressing key 3 whilst in edit mode will enable or disable an alarm. AnX symbol to the left of the channel indicates that a channel is disabled,

seeScreen 18 - Alarm channel disabledfor an example:


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Screen 18 - Alarm channel disabled

Note: Alarm mode definitions: with a latching alarm the relay outputremains de-energised until the user selects the option to cancel thealarm. With a normal alarm the relay output remains de-energised until

the value reaches the recovery value.

6.5.3 User CalibrationThe ability has been provided to perform a calibration on each available gas

channel. This calibration ensures the accuracy of the analyser in its current

operating condition. To ensure optimum performance please ensure your

analyser is returned for service and calibration on time.

1) From the main menu press key 3 to select user calibration. Note: For more information on user calibration, please refer to section

Calibrationin this operating manual.

6.5.4 Set Instrument Time and DateThis option enables the user to set the time and date on the gas analyser.

1) From the main menu press key 4 for set time and date, the followingscreen is displayed:


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Screen 19 - Set time and date

2) Press key 1 to exit without saving any changes.3) Press key 3 to toggle the date format between dd/MM/yy and

MM/dd/yy.

4) Press the enter key to edit the time and date. A ? will becomeavailable in the time and date box.

Screen 20 - Time and date edit

5) Enter the appropriate time and date and once complete press the enterkey to store. The gas analyser will return to the main read screen.

Note: When returning to the main read screen the sampling process willbegin from the start. This is because the timing intervals are dictated

from the time of the gas analyser.


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6.5.5 Sampling OptionsThis option allows the user to define the sample timings for each sample point

and the time between a full set of readings.

1) From the main menu press key 5 for sampling options, the followingscreen is displayed:

Screen 21 - Sampling options

2) Select key 1 to exit without saving any changes.3) Select key 7 to edit the settings and the duration on SP1 will become

highlighted.

4) Use the scroll keys to navigate to the required field that needs changingand select using the enter key. A ? will become present in the selected

field.

Note: Fields available for editing are:1. The duration that each sample point is sampled for.2. The duration that the system is air purged for after each sample point.3.

The interval between the start of sample point 1 being monitored on aset of sample points.

Note: On the GA3KPLUSC without an external sensor this screen is notavailable. On the GA3KPLUSC with an external sensor this screen is for

the external sensor sampling option only as the gas analyser measures

continuously.

5) Key in the new value for the required field and press enter whencomplete.


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6) Press key 7 to save the changes made. The gas analyser will return tothe main read screen.

Note: When returning to the main read screen the sampling process willbegin from the start; this is because the timing intervals are dictated

from the time of the gas analyser.

6.5.6 View Event LogThis option allows the user to view the gas analyser event log to assist in

problem solving and fault detection.

1) From the main menu press key 6 to view the event log, the followingscreen will be displayed:

Screen 22 - View event log

Note: Date values are displayed in the format yy/MM/dd.2) Press key 1 to exit and return to the main read screen.3) Press key 3 to display the oldest record first.4) Press key 5 to delete all the records in the event log.5) Press key 7 to provide more data on the events. This information will

likely be used when contacting the technical support department.

6) After pressing key 7, pressing key 4 and 6 will allow the user to cycleround the data values associated with the event.

Note: For more information please refer to theEvent Logsection in thisoperating manual.


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6.5.7 Display ContrastThe GA3000 PLUS automatically adjusts the screen contrast to maintain a

normal viewing contrast according to the current read-out temperature. This

can also be adjusted by the user.

1) From the main menu press key 7 to adjust the display contrast, thefollowing screen will be displayed:

Screen 23 - Adjust display contrast

2) Press key 1 to exit and return to the main read screen without savingchanges.

3) Use the left and right scroll keys (keys 4 and 6 respectively) to adjustthe contrast.

4) Press the enter key to store the new contrast.6.5.8 System InformationThis screen provides information regarding the gas analyser, including the

serial number and model number.

1) From the main menu press key 8 to view the system information, thefollowing screen will be displayed:


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Screen 24 - System information

2) Press key 1 to exit.6.5.9 Administrator PasscodeAn administrator passcode helps prevent unauthorised users modifying system

settings. The default setting at point of manufacture is for this to be disabled.

The following options are administrator passcode protected:

Time and date setting Alarm set-up Sampling options 4-20mA configuration and safe values Disabling or changing the administrator passcode

1) From the main menu press key 9 to enter the administrator passcodeoptions, the following screen will appear:

Screen 25 - Administrator passcode set-up


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2) Press key 1 to exit and return to the main menu without savingchanges.

3) Press key 5 to change the passcode and a ? will appear in the currentpasscode box.

4) Key in the new code and press enter to confirm Note: The length of the passcode must be 1-6 digits in length.

5) Press the enter key to save the changes you have made and return tothe main menu.

Warning Please ensure you do not lose the passcode as it cannot

be recovered.

When trying to change a setting that is administrator passcode protected the

following screen will appear:

Screen 26 - Administrator passcode required

Key in the required passcode and press the enter key when complete allows

the user to then make changes to the required setting.


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6.6 GA3000 PLUS Sampling Process6.6.1 GA3KPLUS1

Start

Complete first time

run set-up

Sample point1 monitored

4-20mA and

Modbus

outputsupdated

Wait

interval

duration

Sample point

1 air purged

6.6.2 GA3KPLUS2 and GA3KPLUSDStart

Complete first time

run set-up

Sample point

1 monitored

Wait

interval

duration

Sample point

2 monitored

Sample point

1 air purged

Sample point

2 air purged

4-20mA and

Modbus

outputs

updated

4-20mA and

Modbus

outputs

updated


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6.6.3 GA3KPLUS3Start

Complete first time

run set-up

Sample point

1 monitored

Wait

interval

duration

Sample point

2 monitored

Sample point

3 monitored

Sample point

1 air purged

Sample point

2 air purged

Sample point

3 air purged

4-20mA and

Modbus

outputsupdated

4-20mA and

Modbusoutputs

updated

4-20mA and

Modbus

outputs

updated


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6.6.4 GA3KPLUSCStart

Complete first time

run set-up

Sample point1 monitored

continuously

4-20mA and

Modbus

outputs

updated

Waitinterval

duration

CH4, CO2, O2

Waitinterval

duration

External

Sensor

Externalsensor

monitored

4-20mA and

Modbus

outputs

updated

Externalsensor air

purged

6.7 Switching the Gas Analyser OffTo switch off the gas analyser, press and hold down the On/Off key for

approximately five seconds. This will close all solenoids and switch off the

pumps. Power remains on to the rest of the system. The system fault signal is

de-energised when the analyser is switched off.

The instrument can also be turned off at the mains power supply.


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Calibration


7 Calibration7.1 Calibration IntroductionThe GA3000 PLUS range of gas analysers are carefully calibrated at

manufacture and when returned for service. However, it is sometimes

desirable to carry out a calibration process between services.

This section outlines the correct procedures to enable the site engineer to field

calibrate the gas analyser.

Note: This does not replace the factory service and calibration. If thiscalibration is completed incorrectly it may decrease the accuracy of the

gas analyser.

CH4, CO2 and O2 can be measured by all GA3000 PLUS range analysers as

standard; these channels can be user calibrated. There are also optional

additional gases to these which are specified at manufacture; these too can be

calibrated. This section will describe in detail how to calibrate the three

standard gas channels plus the additional internal and external sensors.

Two important terms that are used within this section are Zero and Span.

Zero: The point at which the gas analyser is calibrated when there is none of

the target gas present.

Span: The point at which the gas analyser is calibrated when a known quantity

of the target gas is present.

7.2 Required Calibration Equipment7.2.1 GasUser calibration of a gas analyser will greatly improve the data accuracy in the

range of the calibration gases used, and the environmental conditions for

which the gas analyser is calibrated in. This may cause less accurate readings of

concentrations outside this calibrated range. Users should select the correct

calibrati

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Analizor Gaze - Manual