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OPERATING MANUAL

MPU-1

LEAKAGE CURRENT ALARM SIGNALER

SONEL SA

ul. Wokulskiego 11

58-100 Świdnica, Poland

SONEL TEST & MEASUREMENT Inc.

Santa Clara, Ca, 95054

www.soneltest.com

Version 1.4 9.15.2016

2 OPERATING MANUAL MPU-1 version 1.5

CONTENTS

1 Preface................................................................................................................... 4

2 Introduction .......................................................................................................... 5

3 Safety ..................................................................................................................... 5

4 Description and Features..................................................................................... 5

4.1 Characteristics of MPU-1....................................................................................... 5

4.2 Arrangement of sockets and buttons ...................................................................... 6

4.2.1 Keyboard ....................................................................................................... 6 4.2.2 Sockets ........................................................................................................... 8

4.3 Graphic display (LCD) .......................................................................................... 9

4.4 Acoustic and visual alarm signals. ......................................................................... 9

4.5 Measuring Current with Flexible F-Series Probes. ................................................ 9

5 Starting the operation ........................................................................................ 10

6 Operation ............................................................................................................ 10

6.1 Preparing MPU-1 for operation ........................................................................... 10

6.2 Monitoring the internal power supply voltage supplied by the internal

rechargeable battery ....................................................................................................... 11

6.3 Connecting the device. ......................................................................................... 11

6.4 Operating the interface. ........................................................................................ 12

6.4.1 Monitoring leakage current with “Alarm on” mode ................................... 12 6.4.2 Displaying and Measuring Leakage Current in "Alarm off" mode. ............ 15 6.4.3 Setting the AC current frequency. ............................................................... 16 6.4.5 Info Mode: Activation of the Acoustic Signal. ............................................. 18 6.4.6 Changing the language ............................................................................... 19 6.4.7 Reset function. ............................................................................................. 21

7 Troubleshooting ................................................................................................. 22

7.1 Warnings and information displayed by the device. ............................................ 22

8 Power supply of the device ................................................................................ 23

8.1 Monitoring the power supply voltage .................................................................. 23

8.2 Replacing rechargeable batteries.......................................................................... 23

8.3 Charging rechargeable batteries ........................................................................... 23

8.4 General principles for using Ni-MH rechargeable batteries ................................ 24

9 Cleaning and maintenance ................................................................................ 25

OPERATING MANUAL MPU-1 version 1.5 3

10 Storage ................................................................................................................. 25

11 Dismantling and Disposal .................................................................................. 25

12 Technical specifications ..................................................................................... 25

12.1 Basic data ......................................................................................................... 25

12.2 Other technical specifications .......................................................................... 26

13 Accessories .......................................................................................................... 26

13.1 Basic accessories .............................................................................................. 26

13.2 Optional accessories......................................................................................... 26

14 Manufacturer ...................................................................................................... 28

4 OPERATING MANUAL MPU-1 version 1.5

1 Preface

Thank you for purchasing the MPU-1 leakage current alarm signaler. The MPU-1 is a modern, easy

and safe to use signaling device. Please acquaint yourself with this manual to avoid measuring errors and problems with the operation of the device.

This manual contains three types of warnings. They are presented as a framed text describing the possible risks for the user and the device. Texts starting with word ‘WARNING:’ describe situations,

which may endanger user's life or health when instructions are not followed. Word ‘CAUTION!’ begins

a description of a situation which may result in device damage when instructions are not followed. Indication of possible problems is preceded by word ‘Note:’.

WARNING:

Before operating the device, read thoroughly this manual and observe the safety

regulations and guidelines provided by the manufacturer.

WARNING:

The MPU-1 is designed to provide additional protection against electric shock in the

workplace, therefore using the MPU-1 is NOT a substitute for any other protection measures

in the workplace and/or personal protection equipment used by employees and must not

be relied upon as a sole safety and protection measure. Appropriate occupational health

and safety regulations must be observed along with other instructions, rules and safety

measures in accordance with local or national regulations.

WARNING:

The leakage current alarm signaler is designed to measure and monitor the leakage current

in LV and MV networks. Any application that differs from those specified in this manual may

result in a damage to the device and constitute a source of danger to the user.

WARNING:

The MPU-1 signalers must only be used only by qualified persons, certified to perform

measurements on LV and MV live networks. Operating the device by unauthorized

personnel may result in damage to the device and constitute a source of danger to the user.

WARNING:

Using this manual does not exclude the need to comply with occupational health and safety

regulations and with other relevant fire and safety regulations. Before starting the work with

the device in special environments, e.g. potentially fire-risk/explosive environment, consult

with the person(s) responsible for health and safety. Do not work alone.

OPERATING MANUAL MPU-1 version 1.5 5

2 Introduction

This manual describes the operation of MPU-1 leakage current alarm signaler. We recommend reading

the manual thoroughly in order to avoid errors that may result in danger to the user, or an incorrect

assessment of the tested network. For more information on safety during measurements -see Chapter

3 – Safety. Before first use of the device, be sure to read Chapter 5 – Starting the operation. For

additional information related to interpreting the warnings and information displayed by the device, it is

recommended to read Chapter 7 – Troubleshooting. All information on operating the device may be found in Chapter 6 – Operation.

3 Safety

The MPU-1 is designed for measuring and monitoring the leakage current in LV and MV AC

power systems. It is a tool for assessing the safety of electrical networks by measuring leakage

currents, such as at transmission pylons. The device allows users to set a threshold of leakage

current above which a visual and acoustic alarm will be triggered. The following

recommendations must be observed for the correct operation and accuracy of measured

results:

• Before using the device carefully read this manual

• The MPU-1 should be operated only by qualified persons that have passed occupational health

and safety training.

Do not use or operate the MPU-1 under the following circumstances:

The MPU-1 is damaged, completely, or partially out of order, or has been dropped or subjected to

physical abuse or shock.

The insulation of the test leads are damaged.

The MPU-1 has been stored for an excessive period of time in excessive humidity or heat.

Before using the device make sure the test leads are securely connected to the appropriate measurement sockets.

Repairs may be only performed only by an authorized Sonel service center.

Cautionary Notes:

• If the discharged battery symbol appears on the display (the internal power supply voltage is too low) recharge the batteries.

• When the power supply voltage is too low the measurements performed with the device may

include additional errors undetected by the user and they should not be used to confirm that the tested circuit or network is properly protected.

• Caution is required for AC voltages with RMS value exceeding 30 V or when their peak value

exceeds 42 V. Be also careful when DC voltages exceeding 60 V. Such voltages generate a risk of electric shock.

4 Description and Features

4.1 Characteristics of MPU-1

Design features of the MPU-1 include:

• Constant monitoring of (leakage) current flowing through the grounding of power poles, and pylons, in the range of 0.1 to 299A, in LV and MV 50Hz or 60Hz networks.

6 OPERATING MANUAL MPU-1 version 1.5

• Measurements can be made with one or two current probes. With two probes the measurement of

current is summed for both probes providing the opportunity to measure leakage current in twin poles using individual probes for each component pole.

• An alarm trigger can be set for when the current flow exceeds a user programmable threshold. The

default setting is at 1A. Both an acoustic alarm via a built-in speaker and a visual alarm via flashing

lights are provided.

• No measurement of direct currents.

• Measurements are made with Sonel flexible F-series current probes of Rogowski coil design.

Probes of various diameters can be used without the need to re-calibrate the MPU-1 for each probe.

• The enclosure is ergonomically designed and carries an IP 67 rating. (Protection from ingress

against dust, and immersion to 1m).

• Battery charge status is monitored. An LED indicates operation mode.

4.2 Arrangement of sockets and buttons

Fig.1. Arrangement of LEDs and buttons (front panel).

4.2.1 Keyboard

1 ON/OFF button

Turns the device ON/OFF.

2 MENU button

Selects the measurement function:

• Alarm – setting the alarm on or off

• Curr – setting the alarm threshold for current flow

• Demo – simulation of an alarm condition

1

2

3

4

5

6

OPERATING MANUAL MPU-1 version 1.5 7

• Freq – sets the rated frequency of the network (50Hz or 60Hz)

• Info – information about the operation of the device

• Lang – selects user interface language • Reset – restores factory (default) settings

3 ENTER button

Enters settings, exits to menu.

4 LED indicating the operational status of the device

• LED Illumination states :

- LED is green – the device is in operational mode

- LED is red – device error (additional error code is displayed, as described below)

- LED flashes red – low battery charge level

• Battery charging mode – when connected to AC charger

- LED flashes green –battery charging

- LED is green – battery is fully charged

5 Buttons

A set of cursors with auto-repetition for choosing MENU options and changing settings

6 Alarm LEDs

A set of red alarm LEDs arranged in two rows on the front panel (5 LEDs in each row), and in two

rows at the sides of the device (5 LEDs on each side). Their operation is described in the next sections.

and

8 OPERATING MANUAL MPU-1 version 1.5

4.2.2 Sockets

CAUTION!

MPU-1 signaler is designed to measure the current flowing through conductors with voltages up to 1000V.

Connecting voltages higher than 25V between any of the test terminals may damage the

device.

7 Measuring socket [Probe (1) / Charger]

To connect a single Sonel F-Series Rogowski-type current probe. Used for measurements with a

single probe. The battery charger also connects to this socket; it has the same pronged connector.

Unused socket should be covered with the flexible socket cover.

8 Measuring [Probe (2)]

To connect a second Sonel F-Series Rogowski-type current probe. Used for measurements with a two probes. Unused socket should be covered with the flexible socket cover.

When using two probes the MPU-1 mathematically sums up the current values from the two probes

and does not take into account any phase shifts.

Fig.2. Arrangement of sockets in MPU - 1.

7 8

OPERATING MANUAL MPU-1 version 1.5 9

4.3 Graphic display (LCD)

Fig.3. Screen view in measurement mode.

4.4 Acoustic and visual alarm signals.

Warning signals:

Continuous two-tone beep with flashing alarm LEDs

• Measured current exceeds the set threshold. The beeping lasts for 30 seconds then becomes muted. If the alarm condition continues it is indicated by flashing alarm LEDs.

Two long beeps with illuminated alarm LEDs, repeated every 15 seconds.

• Indicates a low level of battery charge. The device should be switched off and the batteries should be re-charged. If allowed to continue the MPU-1 will turn off automatically.

Short beeps (with active Info option):

• Indicates when the Info function is turned ON. The signal repeates approx. every 60 seconds.

4.5 Measuring Current with Flexible F-Series Probes.

The MPU-1 is calibrated at the factory with Sonel F-Series probes. Probe models compatible with MPU-1 are listed in Chapter 13 "Accessories".

WARNING:

Dangerous voltages are present. Connecting incompatible or damaged current probes may

cause electric shock. Only use Sonel F-Series probes.

Fig. 2 . Screen view when alarm is off.

Measurement of current

Alarm threshold value

Battery charge status

Operation mode:

Alarm is ON

Measurement of current Battery charge status

10 OPERATING MANUAL MPU-1 version 1.5

Note:

The manufacturer guarantees the measurement accuracy when used with measuring

probes supplied with the device or purchased from manufacturer's authorized supplier.

Using extension cords, non-Sonel supplied probes, or other modifications may be a source

of additional errors and safety hazards.

Note:

"CAT III 1000V" marking on accessories is equivalent to "CAT IV 600V" marking.

5 Starting the operation

Before starting the operation of the device:

• Check the MPU-1 for suitability, do not use if the MPU-1 or test leads are damaged, or is malfunctioning.

• Check the settings of the device; the operating mode, and alarm threshold. Ensure the MPU-1 displays results.

6 Operation

Read this chapter thoroughly as it describes metering circuits, measurement methods, settings and

other important issues.

6.1 Preparing MPU-1 for operation

Before performing measurements:

• Make sure that the battery is fully charged.

• Check the device and accessories for damage

• Check the probes are connected securely and the MPU-1 is adequately situated and protected in the test workplace.

WARNING:

Do not leave the MPU-1 unattended when performing tests.

Do not touch the equipment connected to the tested circuit or network.

Note:

Do not use the MPU-1 if the display is unreadable.

Note:

Using accessories other than those specified by the manufacturer is prohibited and may

result in a danger to the user or damage to the device.

OPERATING MANUAL MPU-1 version 1.5 11

6.2 Monitoring the internal power supply voltage supplied by the

internal rechargeable battery

Ensure the MPU-1 battery is fully charged before use. The charge level of the rechargeable battery is indicated by the battery symbol continuously displayed in the right upper corner of the screen.

Fig. 7. Monitoring the battery charge status

For information on the power supply see: Chapter 8 "Power supply of the device".

6.3 Connecting the device.

CAUTION!

Pay attention to the correct connection of plugs of the clamps, as the accuracy of the

measurements depends on the connection quality. Ensure connections are secure and

making good contact and will provide uninterrupted measurement of current.

CAUTION!

Connecting voltage higher than 25V between any of the test terminals may damage the

device.

Connection of the MPU-1 to the power network or device under test is shown in the drawings below:

Fig.9. Operation with single current probe

Battery charge status

12 OPERATING MANUAL MPU-1 version 1.5

Fig.10. Operation with dual current probes

6.4 Operating the interface.

Additional information:

Pressing MENU button when viewing

the MENU options results in exiting the

current MENU option without

confirming the selected value(s). Its function is equal to BACK /CANCEL

button. Any changes / selected

options are confirmed by pressing ENTER.

6.4.1 Monitoring leakage current with “Alarm on” mode

The usual mode of operation of the MPU-1 is with “Alarm on”. When the MPU-1 is turned on it always

begins in “Alarm on” mode. To monitor leakage current flowing proceed as follows:

Connect current probes to the socket: 7 "Probe (1)" to perform single-probe measurement or to both

sockets "Probe (1)" 7 and "Probe (2)" 8 to perform dual-probe measurement.

Then:

OPERATING MANUAL MPU-1 version 1.5 13

The MPU-1 is in operating mode with alarm on. The top line of the display indicates the measured value

of current. The bottom line alternates with the Alarm mode setting (on or off), changing to displaying

the alarm threshold value in Amps. Depending on the value of the measured current the bottom line

also indicates whether the measured current is: lower (I <), equal (I =) or higher (I>) than the threshold setting.

The MPU-1 measures and monitors AC currents of 50Hz or 60Hz depending on user settings. When

the measured current exceeds the alarm threshold setting both a sound and a visual alarm will be

Press MENU button.

,

Use , butto ns to select Alarm . Confirm your choice by pressing ENTER button.

,

Use , buttons to select Alarm on . Confirm your choice by pressing E NTER button.

14 OPERATING MANUAL MPU-1 version 1.5

triggered. The sound alarm, a beep, lasts for 30 seconds, then is muted. The visual alarm is indicated

by flashing LEDs on the MPU-1.

To set the alarm threshold setting for leakage current:

Press MENU button.

,

Use , buttons to select Current . Confirm your choice by pressing ENTER button.

,

Use , buttons to select the cur- rent value above which the alarm will be triggered. Confirm your choice by pressing ENTER button.

OPERATING MANUAL MPU-1 version 1.5 15

After pressing ENTER the device automatically displays "Alarm on" and begins to monitor current.

The most recent threshold setting is retained even after it is turned OFF and ON again.

CAUTION: In "Alarm on" mode - the display turns off after 5 min to reduce energy drain on the battery.

Pressing any button will re-activate the display.

6.4.2 Displaying and Measuring Leakage Current in "Alarm off" mode.

The MPU-1 can be used to measure and display leakage current without the monitoring and alarm

function; “Alarm off mode”. (Note that whenever the MPU-1 is turned on it is always first activated in

“Alarm on” mode.)

To measure and display the leakage current in “Alarm off” mode:

Connect probes to the socket: "Probe (1)" 7 to perform single-probe measurement; or to sockets

"Probe (1)" 7 and "Probe (2)" 8 to perform dual-probe measurement.

Press MENU button.

,

Use , buttons to select Alarm .

Confirm your choice by pressing ENTER button .

16 OPERATING MANUAL MPU-1 version 1.5

After pressing ENTER the MPU-1 displays “Al. off” (Alarm off). In “Alarm off” mode the MPU-1

displays in real-time the measured AC leakage current at 50Hz / 60Hz depending on user settings but

does not monitor for an alarm condition.

Note:

Pressing MENU button results in exiting the current MENU option without

confirming the selected value(s). Its function is equivalent to BACK/CANCEL.

Remember to press ENTER to confirm a selection.

6.4.3 Setting the AC current frequency.

To set the nominal AC frequency of the network for the equipment being measured as either 50Hz or

60Hz in "Alarm on" mode or in "Alarm off" mode:

Press MENU button.

,

Use , buttons to select Alarm off . Confirm your choice by pressing ENTER button.

OPERATING MANUAL MPU-1 version 1.5 17

After pressing ENTER the MPU-1 displays the measured current in the monitoring/measurement

mode. The last setting of frequency is always saved and retained by the MPU-1 after it is turned OFF

and will be in the last setting state when turned ON again.

6.4.4 DEMO function.

The DEMO function is intended to demonstrate the alarm signal to users and personnel responsible

for electrical safety. After selecting the DEMO function the device enters alarm mode for 5 sec

To start DEMO mode:

,

Use , buttons to select

Frequency. Confirm your choice by

pressing ENTER button

,

Use , buttons to select 50 Hz or 60 Hz . Confirm your choice by pressing ENTER button.

18 OPERATING MANUAL MPU-1 version 1.5

After pressing ENTER the device starts the alarm mode for about 5 seconds, then automatically reverts

to the monitoring/measurement mode that was displayed before entering the DEMO mode.

6.4.5 Info Mode: Activation of the Acoustic Signal.

The Info function enables user to turn on an acoustic-chirp signal that indicates that the device is

activated and operational. The chirp repeats approx. every 60s. Select "On" from Info menu to activate the Info mode. Select "Off" disables this function:

Press MENU button.

Press MENU button.

,

Use , buttons to sel ect Demo . Confirm your choice by pressing ENTER button.

OPERATING MANUAL MPU-1 version 1.5 19

Pressing ENTER automatically reverts the MPU-1 to the monitoring/measurement mode that was

displayed before the user changed the settings of the Info function.

Operation of Info function is interrupted during the charging process and when the user presses the MENU button.

The last setting of Info function is saved and remembered by the device even after it is turned OFF and

ON again.

6.4.6 Changing the language

The Language function is used to change the user language.

,

Use , buttons to select Info . Confirm your choice by pressing ENTER button.

,

Use , buttons to select O n or Off . Confirm your choice by pressing ENTER button.

20 OPERATING MANUAL MPU-1 version 1.5

Press MENU button.

The Last setting of Language function is saved and remembered by the device even after it is turned OFF and ON again.

Note:

Interface language versions may differ from each other, not only by language, but also by

functionality or operational features. After changing the language follow the instructions

for the activated language.

,

Use , buttons to select Lan- guage . Confirm your choice by press- ing ENTER button.

,

Use , buttons to select desired language. Confirm your choice by pressing ENTER button.

OPERATING MANUAL MPU-1 version 1.5 21

6.4.7 Reset function.

The Reset function allows the user to restore factory settings - after using this function the MPU-1:

Resets alarm threshold to 1A

Disables the Info function

The mains network frequency resets to 50Hz

NOTE: The language settings remain unchanged:

After pressing ENTER, the meter will reset and turn off then on again automatically.

Press MENU button.

,

Use , buttons to select Reset . Confirm your choice by pressing ENTER button.

,

Use , buttons to select Yes to reset settings or No to cancel. Confirm your choice by pressing ENTER but- ton.

22 OPERATING MANUAL MPU-1 version 1.5

7 Troubleshooting

7.1 Warnings and information displayed by the device.

The MPU-1 display indicates the following error conditions and warnings - they may be related to the operation of the device or to external conditions affecting the measurement process.

Display

message

Cause Notes Solution

I >299A

Measured current exceeds 299A / message only appears in "Alarm off” mode.

In "Alarm on" mode, the

current exceeding the limit

value will be always

indicated by alarm mode -

in both cases: when the

measuring range of the

meter is exceeded and

when the user-set limit is

exceeded.

Potentially hazardous

situation. Disconnect the

device from the equipment

under test.

Err 310

Temperature of

rechargeable

battery is too low.

Occurs during the battery

charging process.

Stop the charging process.

Move the MPU-1 to a higher

ambient temperature and re-

charge. If the problem persists

contact Sonel’s local service

provider.

Err 311

Temperature of

rechargeable

battery is too

high.

Occurs during the battery

charging process.

Stop the charging process.

Move the MPU-1 to a lower

ambient temperature and re-

charge. If the problem persists

contact Sonel’s local service

provider.

Err 312 Damaged battery Occurs during the battery

charging process.

Contact Sonel’s local service

provider.

Err 313

No charging.

Damaged battery

or a problem with

the power supply

adapter.

Occurs during the battery

charging process.

Check the power supply

connection, if the problem

persists contact Sonel’s local

service provider.

Err 550

Incorrect

calibration

parameters.

The instrument has

detected a loss of

calibration data.

Contact Sonel’s local service

provider

Err XXX Other error. XXX – any other code. Contact Sonel’s local service

provider.

OPERATING MANUAL MPU-1 version 1.5 23

8 Power supply of the device

Note:

MPU-1 is designed to operate only with built-in rechargeable batteries installed in the

factory and with factory accessories for charging them.

CAUTION!

Connecting voltage higher than 25V between any of the test terminals may damage the

device.

8.1 Monitoring the power supply voltage The charge level of the rechargeable battery is indicated by the battery symbol continuously displayed

in the right upper corner of the screen. Ensure the MPU-1 battery is fully charged before use.

Batteries charged.

Batteries low.

Notes:

• A discharged battery appearing on the display along with flashing red status LED indicates that the supply voltage is too low and batteries need to be recharged,

• Extremely low battery charge level is indicated by two long beeps with alarm LEDs flashing, repeated every 15 seconds.

• When Low battery charge level is indicated the device should be switched off, or it will switch off

automatically. Measurements performed with low supply voltage will introduce additional errors.

Consequently, such measurements cannot be relied upon to be correct. Recharge the batteries to remedy.

8.2 Replacing rechargeable batteries

The battery may only be replaced only by Sonel’s authorized service department.

8.3 Charging rechargeable batteries

To charge the batteries connect the AC adapter to the socket marked Clamp (1) / Charger. When the

charging process starts the battery charging symbol appears on the screen and the status LED flashes green.

24 OPERATING MANUAL MPU-1 version 1.5

After 30 seconds the display turns off to save power. It may be re-activated pressing any button. After

the charging process ends the LED status indicator is continuously green and the screen displays "Accu full".

Note:

Due to interferences in the AC power the process of battery charging may finish prematurely. When

charging time is too short, turn the meter off, disconnect the charger and start charging again.

8.4 General principles for using Ni-MH rechargeable batteries

Remove the rechargeable batteries and store them separately if you do not use the device

for a prolonged period of time.

Store the batteries in a dry, cool and well-ventilated place and protect them from direct

sunlight. The storage temperature should not exceed 30°C / 86°F otherwise battery lifetime

will be reduced

Rechargeable batteries Ni-MH usually lasts for 500-1000 charging cycles. The rechargeable

batteries reach their maximum capacity after 2-3 charge and discharge cycles. The most

important factor which influences the lifetime of rechargeable batteries is the level of their

discharge. The deeper the discharge level of the batteries, the shorter their lifetime.

The memory effect is limited in the case of Ni-MH batteries. These batteries may be charged

at any point with no serious consequences. However, it is recommended to discharge them

completely periodically.

During storage of Ni-MH rechargeable batteries they will discharge at the rate of

approximately 30% per month. Keeping rechargeable batteries at high temperatures will

accelerate this process. In order to prevent excessive discharge of rechargeable batteries,

charge them from time to time (even if they are not used). Modern fast chargers detect both

too low and too high temperature of rechargeable batteries. Too low temperature prevents

the process of charging which can damage rechargeable batteries. An increase of the

temperature of the rechargeable batteries will stop charging. Charging at a high ambient

temperature reduces batteries' lifetime and causes a further increase of temperature with the

result that the batteries are not charged to their full capacity.

Note that when the batteries are charged with a fast-charger they are charged only to approx.

80% of their capacity. Better results can be achieved by continuing charging; the charger

enters trickle-charging mode and over a few hours the batteries are charged to their full

capacity.

Charging progress is shown in the battery

symbol.

OPERATING MANUAL MPU-1 version 1.5 25

Do not charge or use rechargeable batteries in extreme temperatures. Extreme temperatures

reduce the lifetime of rechargeable batteries; avoid use in very hot environments. The

working temperature range must be observed: -10°C to +50°C / 14°F to 122°F

9 Cleaning and maintenance

CAUTION!

Use only the maintenance methods specified by the manufacturer in this manual.

The case of the MPU-1 may be cleaned with a soft, damp cloth using all-purpose detergents. Do not

use any solvents or cleaning agents which might scratch or abrade the casing. Current probes should

be cleaned using the same methods as the case. Probes and test leads should be cleaned with water

and detergents, but not immersed, and then dried. The electronic system of the device does not require maintenance.

10 Storage

During the storage of the device, the following recommendations must be observed:

• Disconnect all the test leads from the device

• Thoroughly clean the device and its accessories

• To prevent total discharge of the rechargeable batteries due to the prolonged storage charge them periodically

• Storage temperature conditions must be observed: -20°C to +80°C / -4°F to 176°F

11 Dismantling and Disposal

Scrap and disused electronic equipment must not be placed with waste of another kind and should be

sent to a collection point in accordance with local laws for the disposal of electrical and electronic

equipment. Before the equipment is sent to a collection point, do not dismantle any elements.

Observe local regulations concerning the disposal of equipment, and spent batteries.

12 Technical specifications • The specified accuracy relates to the MPU-1 terminals.

• The abbreviation "m.v." in the specification of measurement uncertainty means a standard measured value.

12.1 Basic data Measuring leakage current with current probes:

Current range Resolution Basic uncertainty

0.1 to 9.9 A 0.1 A ±(5% m.v. + 2 digits)

10 to 299 A 1 A ±(5% m.v. + 2 digits)

• Frequency range: 50Hz or 60Hz.

• Flexible current probes: Sonel F-1

26 OPERATING MANUAL MPU-1 version 1.5

12.2 Other technical specifications a) Degree of housing protection acc. to EN 60529........................................................................ IP67

b) Power supply: ……………...................................... 9.4V 2.1Ah Ni-MH battery pack of SONEL type

c) AC adapter for battery charging: …………………............................ 100 V to 240 V, 50 Hz to 60 Hz

d) Standby mode time: ................................................................................................................ >18h

e) Alarm mode time: ...................................................................................................................... >3h

f) Alarm threshold setting range: ..................................................................................... 0,5 A…9,9 A

g) Dimensions: ........................................................................ ....... 125 x 150 x 95 mm / 5 x 6 x 3.7 in

h) Weight of the device with batteries: ............................................................................ approx. 1.1 kg

i) Working temperature ........................................................................ -10°C to +50°C / 14°F to 122°F

j) Charger working temperature: .......................................................... -10°C to +95°C / 14°F to 122°F

k) Reference temperature: .................................................................................................. 23°C / 73°F

l) Storage temperature: ........................................................................ -20°C to +80°C / -4°F to 176°F

m) Relative humidity: .............................................................................................................. 20 to 85%

n) Nominal relative humidity: ................................................................................................. 40 to 60%

o) Altitude (above sea level): ....................................................................................... <2000m / 6562ft

p) Design, construction and manufacturing are ISO 9001 compliant

q) Meets EMC requirements according to: ………................ EN 61326-1:2013 and EN 61326-2-2:2013

13 Accessories

13.1 Basic accessories

• Straps for attaching the signaler and clamps – WAPOZOPAKPL,

• Transport case - WAWALL5,

• Power supply adapter for battery charging – WAZASZ11,

• Power cord of the adapter - WAPRZLAD230,

• Warranty card

• Operating manual

13.2 Optional accessories The following items can be purchased from the manufacturer or a Sonel distributor:

OPERATING MANUAL MPU-1 version 1.5 27

Note: The color and design of the clamps may vary from the shown image.

F-1 Probe 1000A

Flexible probe F-1 (Rogowski coil) with diameter of 40 cm / circumference of

120 cm; 16 in / 48 in

F-2 Probe 1000A

Flexible probe F-2 (Rog owski coil) with a diameter of 25 cm / circumference of 80 cm;

10 in / 32 in

F-3 Probe 1000A

Flexible probe F-3 (Rogowski coil) with a diameter of 13 cm / circumference of

45 cm; 5 in / 18 in

F-4 Probe 1000A

Flexible probe F4 (Rogowski coil)

circumference / length of 200 cm / 79 in

Charger

Charger for charging the battery from 12V ca r socket.

28 OPERATING MANUAL MPU-1 version 1.5

14 Manufacturer

The manufacturer of the device and provider of service:

Internationally:

SONEL SA

Świdnica, Poland

Tel. +48 74 858 3800

Fax +48 74 858 3809

E-mail: [email protected]

Web page: www.sonel.pl

In the USA:

SONEL TEST & MEASUREMENT Inc.

Santa Clara, CA USA

Tel: (408) 988 1346

Fax: (408) 988 4869

E-mail: [email protected]

Web page: www.soneltest.com

Made in Poland.

Note:

Service repairs must be performed only by Sonel or an authorized Sonel service center.

________________________________________________________________________________ Note: Due to constant product development Sonel S.A. reserves the right to change the design and

specifications without prior notice.