INSTRUCTION MANUAL - gas detector tubes...UNIPHOS - 251 PM FIG 1.FRONT PANEL OF THE INSTRUMENT POWER LED 1 LOW ALARM 2 HIGH ALARM 3 UP KEY 4 DOWN KEY 5 SET KEY 6 ENTER KEY 7 LCD DISPLAY

UNIPHOS-250(PM)

PHOSPHINE PORTABLE

MONITOR

INSTRUCTION MANUAL

United Phosphorus Limited Readymoney Terrace, 167,

Dr. Annie Besant Road, Worli, Mumbai - 400 018. India

Tel: (91-22) 2493 0681, Fax: 2493 8826

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TABLE OF CONTENTS

PG NO 1. INTRODUCTION------------------------ 4

1.1 INSTRUMENT DESCRIPTION----------- 4 1.2 WORKING PRINCIPLE--------------- 4

2. DESCRIPTION OF THE DIFFERENT KEYS & CONTROLS ON THE INSTRUMENT---------- 5 FIG-1 FRONT PANEL OF THE INSTRUMENT 5 FIG-2 PHOTOGRAPH OF THE INSTRUMENT

SHOWING FRONT AND SIDE VIEW 6 FIG-3 REAR PANEL OF THE INSTRUMENT 6 2.1 FRONT PANEL----------------------- 7 2.2 SIDE VIEW------------------------ 7 2.3 REAR PANEL----------------------- 8 3. OPERATION---------------------------- 8 3.1 MEASUREMENT MODE------------------ 9 3.1.1 PROCEDURE FOR MEASUREMENT------- 9 4. OTHER MODES OF OPERATION------------- 9 4.1 SELECTING PARAMETER SET MODE-------- 9 4.2 SELECTING CALIBRATION MODE---------- 9 5. HOW TO GO TO THE MEASUREMENT MODE WHEN THE INSTRUMENT IS IN ANOTHER MODE— 10 6. PROCEDURE FOR PERFORMING OPERATIONS IN OTHER MODES---------------------------- 10 6.1 PARAMETER SET MODE------------------ 10 6.1.1 SET DATE-------------------------- 10 6.1.2 SET TIME-------------------------- 10 6.1.3 SET ALARM 1----------------------- 10 6.1.4 SET ALARM 2----------------------- 11 6.1.5 SET DATALOGGING RATE-------------- 11 6.1.6 RESETTING DATALOGGER MEMORY------- 11 6.1.7 ENABLING/DISABLING DATALOGGER----- 11 6.2 CALIBRATION MODE---------------------- 12 6.2.1 ADJUSTING THE ZERO DRIFT---------- 13 6.2.2 ADJUSTING THE GAIN---------------- 13 7.HOW TO DOWNLOAD DATA ON PC/PRINTER------ 14 7.1 TO CREATE NEW CONNECTION ON THE

HYPERTERMINAL-------------------- 14 8.MAINTENANCE----------------------------- 15 9.INSTRUMENT SPECIFICATIONS--------------- 16 10.SENSOR SPECIFICATIONS------------------ 17 11.CONCLUSION/REMARKS--------------------- 18 12.TROUBLESHOOTING GUIDE------------------ 19 13.NOTES---------------------------------- 20 13.LIMITATION OF WARRANTY & LIABLITY------ 21



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Dear Customer, Congratulations on your purchase of Uniphos-250(PM) Phosphine Monitor. This monitor has been produced using the state of the art Technology in our Chemo-Electronic Laboratory at Vapi. to provide you an instrument with the best of features and yet at a moderate cost. It represents the high degree of craftsmanship and reliability that has made UNIPHOS a leader in the field of gas detection. Please read the instruction manual carefully. It gives a brief description of the instrument and the full details of operation for measurement, calibration parameter setting etc. To ensure a long trouble free performance, please take due care and ensure proper maintenance of your monitor as recommended in this Instruction manual. Please do not attempt to use any other accessories and other components other than UNIPHOS.Also do not attempt to open the instrument at site, as it would lead to termination of warranty period for your instrument. If you have any queries regarding the operation or maintenance of your UNIPHOS monitor, please do feel free to consult our factory at the address and we will be too happy to help you. Manufactured At United Phosphorus Ltd. Chemo-Electronic Laboratory At: Nahuli, Post: Umbergaon Dist: Valsad, Gujarat State Pin: 396195, INDIA

Marketing Office United Phosphorus Limited Readymoney Terrace, 167, Dr. Annie Besant Road, Worli, Mumbai - 400 018. India Tel: (91-22) 2493 0681 Fax: 2493 8826



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1. Introduction:

Phosphine is a highly specific fumigant used to control a number of pests in a wide range of agricultural and horticultural crops and in wood products. Its primary application is for quarantine treatment, soil fumigation and post harvest protection. Fumigation is generally carried out by covering the commodities within a leak proof enclosure and applying Phosphine gas at a recommended concentration. As a process control measure it is necessary to monitor the Phosphine concentration at various stages of fumigation. For this application Uniphos 250 (PM) Phosphine portable monitor with a measuring range of 0 – 2000 ppm is suitable. This manual gives the full description of Uniphos 250(PM), its operation, calibration, maintenance and other relevant information 1.1.Instrument Description: Uniphos – 250(PM) Phosphine Monitor is a microprocessor based instrument for the detection of Phosphine in the concentration range of 0 – 2000 ppm. Fig. 1 shows the front panel diagram of the instrument, Fig. 2 & 3 shows the layout of the side & back view of the monitor. The instrument has the following important parts, viz., and the sensor, signal conditioning electronics, digital display, a sample draw pump and a battery pack. Being a microprocessor based unit it has data logging facility and it can store data with real time clock. There is also provision to download the stored data on computer. The instrument works on 4.8 V, 1900mAh Ni-MH Rechargeable batteries. 1.2.Working Principle: The Electrochemical sensor in this instrument when it encounters the target gas a current is generated in proportion to gas concentration. This current is converted into a voltage signal and digitized and displayed on its LCD display. This being a microprocessor-based monitor it can continuously monitor the Phosphine concentration and can store this data in its microprocessor, which can be later downloaded on a computer. The monitor is powered by a 4.8 V Ni MH Rechargeable battery. There are also two alarm set points, which can be set as per customer’s requirement.



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2.DESCRIPTION OF THE DIFFERENT KEYS & CONTROLS ON THE INSTRUMENT: The instrument has got four membrane keys, two alarm LED’s and one

Power LED etc on the front panel and RS-232 & Battery charger socket on the rear panel. Also it consists of gas Inlet/Outlet nozzles on the side of the instrument. The various keys & components are numbered and described in the following diagrams.

METHYL BROMIDE LEAK DETECTOR

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UNIPHOS - 251 PM

FIG 1.FRONT PANEL OF THE INSTRUMENT

POWER LED 1

LOW ALARM 2

HIGH ALARM 3

UP KEY 4

DOWN KEY 5

SET KEY 6

ENTER KEY 7

LCD DISPLAY 8

PH3 0000 ppm

UNIPHOS 250(PM) PHOSPHINE MONITOR



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POWER LED

LOW ALARM

HIGH ALARM

GAS CONCENTRATION DISPLAY

FOR INCREMENTING

FOR DECREMENTING

FOR SETTING THE PARAMETERS

FOR STORING UPDATED PARAMETERS

PUMP INLETPUMP OUTLET

FIG2.PHOTOGRAPH OF THE INSTRUMENT SHOWING FRONT & SIDE

VIEW

FIG3.REAR PANEL OF THE INSTRUMENT The front panel of the instrument is provided with a 16x2 alphanumeric display, a power LED, Low & High Alarm Indication LED’s and four-membrane keys viz.

UNIPHOS-250(PM)

RS-232 SOCKET 9

BATTERY CHARGER SOCKET 10

POWER SWITCH 11

PUMP SWITCH 12

1.

2.

3.

4. 5.

6. 7.

8.

9. 10.

0-2000 PPM



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Up, Down, Set & Enter. The various function keys on the instrument are as shown in Fig 1,2 & 3. 2.1 FRONT PANEL (Fig 1) Power LED (1): This GREEN colored LED when illuminated indicates that the instrument is powered ON. Low Alarm (2): This RED Coloured LED illuminates when the Phosphine concentration exceeds the LOW set point. It stops illuminating when the gas concentration drops below the set limit. Ideally it is factory set at 100 ppm. High Alarm (3): This RED Coloured LED illuminates when the Phosphine concentration exceeds the HIGH set point. It stops illuminating when the gas concentration drops below the set limit. Ideally it is factory set at 200 ppm. Up key (4): This is used to increment the values of digits. Down key (5): This key is used as decrement key in calibration mode and for cursor movement in parameter set mode Set key (6): This key is used to move to the parameter set mode from the default measurement mode. In other modes this is used to skip the present instruction and move over to the next page i.e. changing of page. Enter key (7): This key is used to confirm(update) the parameters. LCD Display (8): This 16x2 Alphanumeric LCD display provides the real time Phosphine Concentration prevailing in the ambient environment. The sample of which is as shown in the figure. Power Switch (11): This slim line Rocker Switch mounted on the back panel of the instrument powers ON the instrument. Pump On/Off Switch (12): This slim line Rocker Switch mounted on the back of the instrument powers ON the pump. 2.2 SIDE VIEW (Fig.2) The right side of the instrument contains 2 ports namely Gas inlet nozzle & Gas Outlet nozzle for sampling. These are marked on the instrument for easier identification. (Refer Fig 2.0) Gas inlet Nozzle (13): The tube through which the sample air is drawn in from the ambient atmosphere or fumigation chamber/silo is to be connected to the gas inlet nozzle.



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Gas Outlet Nozzle (14): The tube is to be connected through the gas outlet Nozzle and disposed off safely or re-circulated in to the chamber/silo. 2.3 REAR PANEL (Fig.3) RS-232 Socket (9): This is provided at the back panel of the instrument for interface with the Computer/Printer. The Phosphine Monitor can be interfaced with the PC/Printer for easy downloading/printing of data present in the monitor. The other end is to be connected to the COM port of the PC. Battery Charger (10): This outlet is provided for charging the monitor. Plug the charger to 230V, 50Hz Outlet and the other end to the Phosphine Monitor and plug it ON. 3.OPERATION: 1.Power the instrument ON by putting the power ON switch provided at the back of the instrument. 2.The instrument displays the following prompts one after the other as shown below and finally stays in measurement mode. “UNIPHOS-250-PM” “PHOSPHINE” “PORTABLE MONITOR” This indicates the make and model no of the instrument. “RANGE:0-2000 ppm” This indicates the range of the instrument. “RESOLUTION: 1 ppm” This defines the resolution of the instrument. “DD: MM: YYYY” (Date: Month: Year) 1st Row of the display “HR: MIN: SEC “ (Hour: Minutes: Second) 2nd Row of display This displays the current date & time in the above mentioned format Then the display reads “PH3: 0000 ppm” in the Phosphine free Clean Air. This is measurement mode.



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What is displayed is the measure of the prevalent Phosphine Concentration present in the ambient atmosphere, provided the instrument has already been zeroed and calibrated. 3.1 MEASUREMENT MODE Once the instrument is in measurement mode the instrument is ready for making measurement. NOTE: Zeroing of the instrument is not necessary after every measurement It can be done at the beginning of the day following the method described in 6.2.1

3.1.1. PROCEDURE FOR MEASUREMENT The Uniphos-250- PM Phosphine Monitor can be used for the following purposes: 1.Measurement in working environment: To monitor Phosphine gas concentration in the ambient environment for personal protection. 2.Monitoring Phosphine Gas concentration during fumigation process: To monitor the Phosphine gas concentration in the silo during the fumigation process. Connect one end of a sampling tube to the GAS INLET of the monitor and put the other end of the tube in the silo where the gas concentration is to be monitored. Gas coming out from the outlet should be disposed off to the silo itself.

4.OTHER MODES OF OPERATION

The instrument has got two other modes for performing the following operations: 1.PARAMETER SETTING 2.CALIBRATION OF THE INSTRUMENT In your monitor the parameters are set already. But if you want to change any of them you have to go to PARAMETER SET MODE of the instrument.

4.1 SELECTING PARAMETER SET MODE: When you are in the measurement mode if you press the SET key, the instrument will go to the Parameter set mode. 4.2 SELECTING CALIBRATION MODE: Press the UP key when you are in measurement mode. The instrument goes to the calibration mode.



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5.HOW TO GO TO THE MEASUREMENT MODE WHEN THE INSTRUMENT IS IN ANOTHER MODE:

Press SET key until the measurement Page appears.

6.PROCEDURE FOR PERFORMING OPERATIONS IN OTHER MODES:

6.1.PARAMETER SET MODE

As mentioned in Section 4.1 press SET Key to go to PARAMETER SET MODE. Now follow the steps mentioned below to set the various parameters.

6.1.1. SET DATE:

1. Once you go to the parameter set mode the display will show the current date. 2. The cursor will also be blinking on the first digit. Use DOWN Key to move the cursor horizontally on different digits. 3. If any digit is to be changed move the cursor on the digit and press UP Key. Using UP Key the digits can be changed from 0-9. 4.Press ENTER Key to confirm the changed digit. Incase the displayed date is not to be changed you can press SET Key to escape from the date page to next page i.e. set time page.

6.1.2. SET TIME:

1. When you are in the measurement mode press the SET Key until the display shows the current time. The cursor will now be blinking on the first digit. 2. As explained in previous section use DOWN Key to move to different digits horizontally and Up Key to change the digits on which cursor is blinking. Using UP Key the digits can be changed from 0-9. 3.Every change of digit is to be confirmed by pressing ENTER Key. If time is not to be changed press SET Key to escape from this page and go to next page.

6.1.3. SET ALARM 1: 1.Press the SET Key until the display shows SET ALARM 1 Page. 2.The cursor will now be blinking on the first digit. Use DOWN Key to navigate through the different digits. 3. If any digit is to be changed press UP Key. Using UP Key the digits can be changed from 0-9. 4.Press ENTER Key to confirm the changed Alarm Set point. The unit will now go to the next page i.e. SET ALARM2 Page.



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If Alarm 1 is not to be changed press SET Key to escape from this page and go to next page.

6.1.4. SET ALARM 2:

1.Press the SET Key until the display shows SET ALARM 2 Page. 2.The cursor will now be blinking on the first digit. Use DOWN Key to navigate through the different digits. 3. If any digit is to be changed press UP Key. Using UP Key the digits can be changed from 0-9. 4.Press ENTER Key to confirm the changed Alarm Set point. The unit will now go to the next page i.e. SET DATA LOGGING RATE Page. If Alarm 2 is not to be changed press SET Key to escape from this page and go to next page.

6.1.5. SET DATA LOGGING RATE: 1. Press the SET Key until the display shows SET DATA LOGGING RATE Page. The display will now show “LOG TIME”. 2. The cursor will now be blinking on the first digit. Use DOWN Key to navigate through the different digits. 3. If any digit is to be changed press UP Key. Using UP Key the digits can be changed from 0-9. 4. Press ENTER Key to confirm the changed digit.

Note: The user can set any data-logging rate from 0-59 minutes. In case Data logging rate is not to be changed press SET Key to escape from this page and go to next page.

6.1.6. RESETTING DATA LOGGER MEMORY:

1. Press the SET Key until the display shows RESET DATA LOGGING MEMORY Page. The display will now show “RESET DATALOGGER” 2. Press ENTER key to reset Data Logger. CAUTION: Resetting Data Logger Memory refers to deletion of all the records present in the memory of the instrument and not available to the user during later periods. If the records in the data logging memory are not to be deleted press SET Key to escape from this page and go to next page.

6.1.7. ENABLING/DISABLING DATA LOGGER:

1. Press the SET Key until the display shows ENABLE/DISABLE DATALOGGER Page. The display will now show “ENABLE/DISABLE DATALOGGER”



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2. Press ENTER key to ENABLE/DISABLE Data Logger. 3. In case the data logger is enabled then the display shows “DISABLE DATALOGGER” CONFIRM? 4.Press ENTER key to “DISABLE DATALOGGER” or press SET key to return to measurement mode. The same procedure is applicable to “ENABLE DATALOGGER” too. Press SET Key to escape from this page and go to measurement mode.

6.2.CALIBRATION MODE

Calibration of the instrument involves two steps: 1) Zeroing the instrument in clean air 2) Applying gas of known concentration and adjusting the gain so that the reading matches with the calibration gas concentration As mentioned in Section 4.2 press UP Key to go to CALIBRATION MODE.



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6.2.1. ADJUSTING THE ZERO DRIFT 1. Once you go to the calibration mode the first page will be the CAL OFF

Page. If the reading is already zero, press SET Key. When SET Key is pressed the unit will go to CAL GAIN Adjustment Page.

2. If the reading is negative, using UP Key increment the CAL OFF zero value until the reading becomes zero. If the reading is positive, using DOWN Key decrement the CAL OFF zero value until the reading becomes zero.

NOTE: The range of CAL OFF zero value is from –125 to +125. If the CAL OFF zero value has reached the extreme value and the reading is still not zero, then zero adjustment is not possible with the Keys.

3. Press the Enter Key to confirm the new CAL OFF zero value. Now the unit will go to the CAL GAIN Adjustment Page.

6.2.2. ADJUSTING THE GAIN 1. When you press the SET Key in the Calibration Mode, the unit will go to the

CAL GAIN Adjustment Page. 2. Now apply the calibration gas of known concentration to the gas inlet of the

instrument. Reading on the LCD panel will start rising slowly & will settle at some value.

3. If the displayed reading is matching with the calibration gas concentration exit CAL Gain Mode (i.e. Go to measurement mode) by pressing SET Key. No further confirmation by ENTER Key is necessary.

4. If the displayed reading is less than the calibration gas concentration press UP Key until the reading matches with the calibration gas concentration. If the displayed reading is more than the calibration gas concentration press DOWN Key until the reading matches with the calibration gas concentration.

NOTE: The range of CAL GAIN value is from –125 to +125. If the CAL GAIN value has reached the extreme value and the reading is still has not reached the expected reading, then gain adjustment is not possible with the Keys and the unit should be sent to the factory for calibration.

5. Now press the Enter Key to confirm the new CAL GAIN value. 6. Now the unit comes back to the measurement mode.



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7. HOW TO DOWN LOAD DATA ON PC/PRINTER 1.Connect the cable given for data downloading to the RS232 Slot provided at the rear panel of the instrument. Connect the other end of the cable (9-Pin Connector) to the COM1 Port of PC or Port of Printer. 2.To download data on PC, select *HyperTerminal. This is an application generally provided along with the operating system ranging from Windows 98 and upwards. 3.Press the ENTER Key on the front panel of the instrument. The instrument will go to the DATA DOWNLOAD Page. Now the LCD will display “DOWNLOAD?”

4.Press the ENTER Key. The LCD will display “DOWNLOAD? CONFIRM?”. 5.Press the ENTER Key once again to download the data. The display will now show the number of records being downloaded on to the PC/Printer. After downloading the records the unit will go to the measurement mode.

Press SET Key to escape from this page and go to the measurement mode.

7.1. * TO CREATE NEW CONNECTION ON THE HYPERTERMINAL 1. Click on the start button on the PC. 2. Now go to PROGRAMS-> ACCESSORIES -> COMMUNICATIONS -> HYPERTERMINAL 3. A “New Connection –HyperTerminal” window will appear and on that a “Connection Description” Dialog box will appear. 4. In the “Name” Text Box enter a name for your connection (say ABC). 5. Click on the OK Button. 6. Now a “Connect To” Dialog Box will appear. 7. In the “Connect to” Text Box select “Direct to COM1/COM1” from the drop down list. 8. Click on OK Button 9. Now “COM1 Properties” Dialog Box will pop up. 10. In the “Port Settings” Tab set the parameters as given below: Bits per second – 9600 Data Bits - 8 Parity - None Stop Bits - 1 Flow Control - None 11. Click on the OK Button 12. Now a blinking cursor will appear on the New Connection (say ABC) Window.



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Now the data in the memory of the equipment can be downloaded to the PC. The records will appear on the new connection window.

8.MAINTENANCE: The following points should be ensured for proper maintenance of the monitor. NOTE: 1. NEVER allow the unit to be used in direct sunlight. You may please provide

the canopy/sun shade while using on the site. 2. ALWAYS use good quality 1.2V x 4 NiMH or 1.2V x 4 rechargeable

batteries. 3. NEVER expose the sensor to gas concentration higher than its

prescribed range. 4. DO NOT expose the monitor to excessive positive or negative pressure. It

affects the accuracy of measurement.

The other maintenance required are: (i) A regular battery check and recharging it when the “LO BAT” symbol

appears on the LCD.



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9.INSTRUMENT SPECIFICATIONS: 1. Detection principle : Electrochemical sensor 2. Gas sampling : Sample draw Type (with inbuilt pump) 3. Display : 16X2 Alphanumeric LCD Display with

Backlight 4. Inbuilt pump : Flow rate:Approximately 400 ml/min Power: 4.5 V DC, 35 mAh 5. Power supply : 4.8 V, 1900mAh Ni-MH rechargeable

battery. 6. Dimensions : Height - 90 mm Width - 110 mm Depth - 170 mm 7. Weight : 1030 g 8. Construction : Mild steel material 9. Standard Accessories : Battery charger (150 mA constant current output). RS232 Connector for PC Interface 10. Certification : ERTL CERTIFIED for

Groups Ex ib IIA & IIB Temperature – T6 (IS:13346 / 2004 & IS:5780 / 2002)



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10.SENSOR SPECIFICATIONS:

1. Gas detected :Phosphine 2. Concentration range :0-2000 ppm 3. Resolution :1 ppm 4. Warm up time :Less than 2 min 5. Response time (T95): Typically less than 25 sec 6. Accuracy :Inherently ± 2% (but also depends on the accuracy of

the calibrating gas) 7. Drift :Less than 2% of signal per month at constant temperature and pressure. 8. Operating :0 to + 40 oC temperature 9. Operating pressure: Ambient ± 10% 10. Operating life of: Expected life 1 – 2 years sensor Warranted for one year.



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11. CONCLUSION /REMARKS



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12.TROUBLESHOOTING GUIDE

FAULT CAUSE REMEDY

MONITOR DOES NOT GET TURNED ON

BATTERY LOW RECHARGE THE BATTERY

POWER LED GLOWS, BUT NOTHING IS

DISPLAYED ON THE LCD


WHEN PUMP IS TURNED ON, THE DISPLAY

TURNS OFF


1313 13113133

Note: The above guide is merely a helping guide to inspect minor problems .In case the monitor does not operate by using this the instrument should be shipped to the factory. Any tampering with the instrument beyond the specified guidelines would damage the instrument and Uniphos does not hold any liability of the instrument.



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13.NOTES



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14. LIMITATION OF WARRANTY AND LIABILITY Seller warrants that this product, under normal use and service as described in the operator’s manual shall be free from defects in workmanship and material for a period of twelve (12) months, or the length of time specified in the operator’s manual, from the date of shipment to the customer. This limited warranty is subject to the following exclusion: - a. Batteries and certain other components when indicated in specifications are warranted for a period of 90 days from the date of shipment to the customer. b. With respect to any repair services rendered, Seller warrants that the parts repaired or replaced will be free from defects in workmanship and material, under normal use, for a period of 90 days from the date of shipment to the customer c. Seller does not provide any warranty on finished goods manufactured by others. Only the original manufacturer’s warranty applies. d. Unless specifically authorized in a separate writing by Seller, Seller makes no warranty with respect to, and shall have no liability in connection with, any goods, which are incorporated into other products or equipment by the Buyer. All goods returned under warranty shall be at the Buyer’s risk of loss; Seller’s factory prepaid, and will be returned at Seller’s risk of loss, Buyer’s Factory prepaid. The foregoing is IN LIEU OF all other warranties and is subject to the conditions and LIMITATIONS stated herein. NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR MERCHANTABILITY IS MADE. THE EXCLUSIVE REMEDY OF THE USER OR PURCHASER, AND THE LIMIT OF LIABILITY OF SELLER FOR ANY AND ALL LOSSES, INJURIES, OR DAMAGES IN CONNECTION WITH THIS PRODUCT (INCLUDING CLAIMS BASED ON CONTRACT NEGLIGENCE, STRICT LIABILITY, OTHER TORT, OR OTHERWISE) SHALL BE THE RETURN OF THE PRODUCT TO THE FACTORY OR DESIGNATED LOCATION AND THE REFUND OF THE PURCHASE PRICE, OR, AT THE OPTION OF THE SELLER, THE REPAIR OR REPLACEMENT OF THE PRODUCT. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES.SELLER SHALL NOT BE RESPONSIBLE FOR INSTALLATION, DISMANTLING, REASSEMBLY OR REINSTALLATION COSTS OR CHARGES. NO ACTION, REGARDLESS OF FORM, MAY BE BROUGHT AGAINST THE SELLER MORE THAN ONE YEAR AFTER THE CAUSE OF ACTION HAS ACCRUED. The purchaser and all users are deemed to have accepted the terms of this LIMITATION OF WARRANTY AND LIABILITY, which contains the complete and exclusive limited warranty of Seller. This LIMITATION OF WARRANTY AND LIABILITY may not be amended or modified nor may any of its terms be waived except by a writing signed by an authorized representative of the Seller.



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(Due to continuing development we reserve the right to Change specifications without prior notice)

I IManufactured At United Phosphorus Limited Chemo Electronic Laboratory P. O. Nahuli, Tal. Umbergaon, Dist. Valsad - 369 108, India Tel.: 91-260-2730156/7/8/9 Fax: 91-260-2730160/2431823 I http://www.chemo-electronic.com/

Marketing Office United Phosphorus Limited Readymoney Terrace, 167, Dr. Annie Besant Road, Worli, Mumbai - 400 018. India Tel: (91-22) 2493 0681,Fax: 2493 8826 I


http://www.chemo-electronic.com/


Documents

INSTRUCTION MANUAL - gas detector tubes...UNIPHOS - 251 PM FIG 1.FRONT PANEL OF THE INSTRUMENT POWER LED 1 LOW ALARM 2 HIGH ALARM 3 UP KEY 4 DOWN KEY 5 SET KEY 6 ENTER KEY 7 LCD DISPLAY