WatchGas UNI Sustainable User manual

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UNI Sustainable Single Gas Detector
User Manual
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Contents
Contents 2
Description 3
Warning 3
Proper Disposal 3
1 Product Overview 4
2 Activation 5
2.1 Switch On 5
2.2 Warm Up Sequence 5
3 Mode 6
3.1 Normal Mode 6
3.1.1 Min Screen ( for Oxygen sensor only) 6
3.1.2 Turn unit o 6
3.2 Cong Mode 7
3.2.1 Enter Cong Mode 7
3.2.2 Sensor Calibration 7
3.2.3 Calibration Adapter 7
3.2.4 Zero Calibration 8
3.2.5 SPAN Calibration 8
3.2.6 Bump Test 8
3.2.7 Change Alarm Limit 8
3.2.8 Change Bump/CAL Interval 9
3.2.9 Change SPAN Value 9
3.2.10 Vibrator enable/disable 9
3.2.11 Power On Zero enable/disable 9
3.2.12 Fast Power enable/disable 10
3.2.13 Reset Cong 10
3.2.14 Exit Cong Mode 10
4 Maintanance 10
4.1 Replace the battery 10
4.2 Replace the Sensor Filter 11
4.3 Replace the Sensor 11
5 Alarm Signal Summary 13
6 Trouble shooting 14
7 Specications 15
8 Limited Warranty 17

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Description
The UNI Sustainable is a single sensor, portable, personal toxic gas monitor. It displays gas
concentration continuously on a big segment LCD. It also monitors STEL, TWA, peak and min (for O2
only) value of the gas and can be displayed on demand. High, Low, STEL&TWA alarm threshold values
are congurable. The shell is made of high strength, durable material. Two key operation, simple to
use. Sensor and battery can be replaced easily. Calibration is also very convenient.
Warning
This manual must be carefully read by all individuals who have or will have the responsibility of using,
maintaining or servicing this product. The product will perform as designed only if it is used, maintain-
ed and serviced in accordance with the manufacturer’s instructions.
• Never operate the monitor when the cover is removed.
• Remove the monitor cover and battery only in area known as non-hazardous.
• Use only WatchGas lithium battery.
• This instrument has not been tested in an explosive gas/air atmosphere having an oxygen
concentration greater than 21%.
• Substitution of components will impair suitability for intrinsic safety.
• Substitution of components will void warranty.
• It is recommended to bump test with a known concentration gas to conrm the instrument is
functioning properly before use.
• Before use, ensure that the ESD lm on the display is not damaged or peeling.
Proper Disposal
The Waste Electrical and Electronic Equipment(WEEE) directive (2012/19/EU) is intended to promote
recycling of electrical and electronic equipment and their components at end of life . This symbol
(crossed-out wheeled bin) indicates separate collection of waste electrical and electronic equipment
in the EU countries. This product may contain one or more Nickel-metal hydride (NiMH), Lithium-ion,
or Alkaline batteries. Specic battery information is given in this user guide. Batteries must be recycled
or disposed of properly. At the end of its life, this product must undergo separate collection and
recycling from general or household waste. Please use the return and collection system available in
your country for the disposal of this product.

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1. Product Overview
DETECTOR COMPONENTS
1. Audible Alarm Port
2. LED alarm window
3. LCD
4. Left Key (Conrm/Number increasing)
5. Right Key (Power/ Cursor moving)
6. Alligator clip
7. Sensor
8. Vibrator
DISPLAY SYMBOLS
1. Gas name, includes: CO, H2S, SO2, O2, VOC
2. Question mark
3. OK
4. Gas unit, includes: x10-6, ppm, %, mg/m3,
µmol/mol
5. Battery
6. HIGH, LOW, STEL, TWA alarm
7. Span calibration
8. Zero calibration
9. Number
1
3
3
4
4
5
5
6
6
7
7
8
8
9
2
2
2
2
1

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2. Activation
2.1 SWITCH ON
Press and hold the Right Key for 3 seconds, until LCD displays ( ) , buzzer beeps, green LED ashes,
then release the button, the unit is powered on.
2.2 WARM UP SEQUENCE
After powered on, the unit enters a warm up and self-test sequence and shows the rmware version as
follows:
If the sensor is not able to be identied by the instrument or is not installed into the instrument,
then the screen switches between and .Otherwise, the following values will be shown
accordingly:
High alarm threshold value
Low alarm threshold value
STEL (short-term exposure limit) alarm threshold value
TWA (time-weighted average) alarm threshold value

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3. Mode
3.1. NORMAL MODE
The unit enters normal mode, start monitoring gas concentration and display on the LCD screen.
User can check some other values like STEL,TWA, PEAK, and MIN (for O only)
by pressing the Right Key.
*Unit will return to real time reading from any other screen when there’s no
key action for 60 seconds.
3.1.1 MIN SCREEN FOR OXYGEN SENSOR ONLY
3.1.2 TURN UNIT OFF
In normal display mode, press and hold the Right Key, then the unit will display a 5 second count
down, LEDs will ash and buzzer will beep once per second.
STEL screen
TWA screen
Press the Left Key again, minimum value is cleared
Press the Left Key again, minimum value is cleared
PEAK screen
Press the Left Key to clear peak value
Press the Left Key to clear min value
Press the Left Key again, peak value is cleared.

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3.2 CONFIG MODE
In Cong mode, user can do calibration & change parameters for the unit. In general, use the Left
Key to increase the number or conrm, use the Right Key to move the cursor or move to the next
programming item.
3.2.1. ENTER CONFIG MODE
Press and hold the Left Key and the Right Key together for 3 seconds, the unit enters Cong mode.
The Cong mode is password protected, LCD displays to prompt enter password. The screen
displays , with one digit ashing.
To input password, use the Left Key to increase the number, use the Right Key to move cursor. Once all
four digits are input, the cursor will move to“OK”, use the Left Key to nish password input and enter
the Cong mode. If the digit input is mistaken, use the Right Key to move cursor between four digits
and “OK” mark, to change the input.
*WatchGas Sustainable preset password is 0000.
3.2.2. SENSOR CALIBRATION
Before the unit can monitor gas correctly, it needs to know the metric, this is done by zero calibration
and span calibration.
3.2.3 CALIBRATION ADAPTER
1. Calibration adapter is used to apply gas to the unit during calibration.
2. Before span calibration (in the following section), attach the Calibration Adapter over the inlet
port on the front of the UNI Sustainable by pressing it into place.
3. Open the gas cylinder valve, then press the Left Key to start the calibration count down.

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4. Take o the Calibration Adapter and complete calibration.
When monitoring, never operate the UNI Sustainable with the Calibration Adaptor attached.
The UNI Sustainable’s sensor operates by diusion. If the Calibration Adapter is attached during
normal operation, inconsistent and lower-than-normal readings will occur because of decreased
concentration of the gas being monitored.
3.2.4 ZERO CALIBRATION
Zero calibration is to set the base line for the sensor, it is done in fresh air. When LCD displays
press the Left Key to start zero calibration. The unit will start a 15 second count-down, after the count-
down is nished, zero calibration result will be displayed on the LCD, pass or fail . If user
does not want to do zero calibration, during the 15 seconds count, press the Right Key, , zero
calibration is aborted.
3.2.5 SPAN CALIBRATION
Span calibration is to set the metric of the sensor to the gas, it is done with a known concentration
gas. When LCD displays apply the known gas to the unit, then press the Left Key to start span
calibration. Unit will start count-down, the count-down time depends on dierent sensors (normally
60 seconds), after count-down is nished, span calibration result will pass or fail . If user
does not want to do span calibration during count-down, press the Right Key, LCD displays ,
span calibration is aborted.
3.2.6 BUMP TEST
Bump test is to check if sensor and alarm devices are working properly, it is done with a known
concentration gas. When LCD displays , apply the known gas to the unit, then press the Left Key
to start bump test. Unit will start count-down, the count-down time depends on dierent sensors
(normally 45 seconds), after count-down is nished, bump test result will be displayed on the LCD,
pass or fail . If user does not want to do bump test during count-down, press the Right Key,
LCD displays , bump test is aborted.
3.2.7 CHANGE ALARM LIMIT
All the preset alarm limits, High, Low, STEL & TWA can be changed. When LCD displays:
Press the Left Key, to change the corresponding alarm limit, the value change process is similar. First
the current setting value is displayed, with the rst digit ashing: .
Use the Left Key to increase the current digit, , cycle from 0 to 9.
Use the Right Key to move cursor to the next digit:

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After all digits are done, use the Right Key to move cursor to“OK” symbol, press the Left Key to
conrm the changing.
* The UNI Sustainable will show “Err”, if the input data is invalid as follows,
- Low alarm setting is bigger than high alarm setting.
- High alarm setting is smaller than low alarm setting.
- Input data is bigger than measuring range.
3.2.8 CHANGE BUMP/CAL INTERVAL
The bump and cal interval can also be changed. When LCD switches between:
and , and .
Press the Left Key, to change the corresponding interval range, the value change process is similar.
First the current setting value is displayed, with the rst digit ashing: .
Use the Left Key to increase the current digit, , cycle from 0 to 9.
Use the Right Key to move cursor to the next digit:
After all digits are done, use the Right Key to move cursor to“OK” symbol, press the Left Key to
conrm the changing.
* The UNI Sustainable will show “Err”, if the input data is out of valid range: 0~180 day(s).
3.2.9 CHANGE SPAN VALUE
The span calibration preset value can also be changed, the change process is similar with the alarm
limit. But the new span will not take eect until user successfully completes a span calibration next
time.
* UNI Sustainable will show “Err”, if the input data is invalid as follows:
- Span setting is smaller than 5% measuring range or bigger than measuring range.
- For Oxygen sensor, span setting is bigger than 19.0.
3.2.10 CHANGE DISPLAY UNIT
The UNI Sustainable supports dierent gas units, to change gas unit, when LCD switches between
and , press the Left Key to change gas unit. The supported units for current sensor are all
displayed on the LCD, the current selected unit is blinking. Use the Right Key to change unit, use the
Left Key to conrm selected gas unit.
3.2.11 VIBRATOR ENABLE/DISABLE
The vibrator consumes a lot of power, it can be disabled to save battery power, to extend the battery
life. When LCD switches between and , press the Left Key to change the vibrator enable/
disable status. The current vibrator status is displayed on the LCD, switching between and
if the vibrator is enabled, or switching between and , if the vibrator is disabled.
Use the Right Key to change the enable/disable status, and use the Left Key to conrm the change.

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3.2.12. POWER ON ZERO ENABLE/DISABLE
Sensor base line may have some changes due to the environment (temperature, humidity), that will
require a zero calibration. Mthe Uni Sustainable can do zero calibration every time the unit is powered
on; this feature can be enabled/disabled.
When LCD switches between and , press the Left Key to go to change power on zero cali-
brations enable/disable status. The current enable/disable status is displayed on the LCD, use the Right
Key to change, use the Left Key to conrm the change.
3.2.13 FAST POWER ON ENABLE/DISABLE
If fast startup is enabled, the screens showing High/Low/STEL/TWA alarm threshold value will be skip-
ped during warm up sequence.
When LCD switches between and , press the Left Key to change fast startup enable/disa-
ble status. The status is displayed on the LCD, switching between and if the fast startup
is enabled, or switching between and if the fast startup is disabled. Use the Right Key to
change the enable/disable status, use the Left Key to conrm the change.
3.2.14. RESET CONFIG
If the unit parameter is incorrect and user does not know how to set them back, user can use reset
cong to make all the parameters back to factory default.
When LCD switches between and , press the Left Key to enter cong reset menu, press
the Left Key to conrm cong reset.
3.2.15. EXIT CONFIG
When LCD displays , press the Left Key exit from Cong mode back to normal mode.
4. Maintanance
Caution
Maintenance should be performed only by a qualied person who has proper training and
fully understands the contents of the manual.
4.1 REPLACE THE BATTERY
When the battery’s charge is low, LCD displays , battery low alarm will be triggered once every
minute. User needs to replace the battery.
When battery is dead, LCD displays , battery dead alarm will be triggered once every
second. User needs to replace the battery.

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To replace battery:
1Turn o the UNI Sustainable.
2Place the UNI Sustainable face down on a soft surface.
3Use a T10 Torx screwdriver to loosen each of the four screws by turning them counterclockwise.
4Remove the top cover after carefully unplugging the buzzer connector.
5Slide the battery out of its compartment.
6Place the new battery into the compartment with its “+”end oriented toward the “+”on the printed
circuit board.
7Plug in the buzzer connector and reinstall the top cover.
8Install the screws in back cover. Be careful to not overtighten the screws
4.2 REPLACE THE SENSOR FILTER
A “peel-and-stick” lter should be used on the UNI Sustainable in order to keep debris from fouling
the sensor. Sheets of 5 lters are available. When the lter appears dirty, replace it with a new one and
dispose of the dirty lter.
1Turn o the UNI Sustainable.
2Place the UNI Sustainable face down on a soft surface.
3Use a T10 Torx screwdriver to loosen each of the four screws by turning them counterclockwise.
4Remove the top cover after carefully unplugging the buzzer connector.
5Peel a lter from the sheet and center it over the sensor. Gently press down.
6Plug in the buzzer connector and reinstall the top cover.
7Install the screws in back cover. Be careful to not overtighten the screws.
4.3 REPLACE THE SENSOR
The UNI Sustainable models are designed so that you can easily change the sensor.
1Turn o the unit.
2Place the UNI Sustainable face down on a soft surface.
3Use a T10 Torx screwdriver to loosen each of the four screws by turning them counterclockwise.
4Remove the top cover after carefully unplugging the buzzer connector.
5Replace the old sensor with a new one. Make sure the pins are not bent or corroded . Align the pins
to the corresponding holes and push the sensor straight in . The sensor should t ush against the
printed circuit board.
6Plug in the buzzer connector and reinstall the top cover.
7Install the screws in back cover. Be careful to not overtighten the screws.
Warning
Sensors are not interchangeable. Use only WatchGas sensors, and use only the sensor type
specied for your UNI Sustainable monitor. Use of non-WatchGas components will void the
warranty and can compromise the safe performance of this product.

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*Filter need to be replaced when it becomes
discolored, clogged with particles or draws in
liquid, otherwise it will contaminate sensor
and void warranty.
Caution
Change battery only in area known to be non-hazardous.
Use only WatchGas battery.
SENSOR FILTER
SENSOR
BATTERY

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5. Alarm signal summary
Buzzer: 3 beeps per second
LED: 3 ashes per second
Vibration: 1 per second
“OVER” and “500” 1 ash per second
BUMP OVER DUE ALARM:
Buzzer: 1 beep per minute, LED: 1 ash per minute, Vibration: 1 per min
HIGH ALARM: Buzzer: 3 beeps per second, LED: 3 ashes per second,
Vibration: 1 per second. “HIGH” 2 ashes per second.
LOW ALARM: Buzzer: 2 beeps per second, LED: 2 ashes per second
Vibration: 1 per second. “LOW” 2 ashes per second.
STEL ALARM: Buzzer: 1 beep per second, LED: 1 ash per second,
Vibration: 1 per second. “STEL” 2 ashes per second
TWA ALARM: Buzzer 1 beep per second, LED 1 ash per second,
Vibration: 1 per second. “TWA” 2 ashes per second
NEGATIVE DRIFT ALARM: Buzzer: 1 beep per second, LED: 1 ash per
second, Vibration: 1 per second

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CAL OVER DUE ALARM:
Buzzer: 1 beep per minute, LED: 1 ash per minute, Vibration: 1 per minute
SENSOR ERROR: Buzzer 1 beep per second, LED 1 ash per second,
“SEN Err”1 ash per second
BATTERY LOW ALARM: Buzzer: 1 beep per second, LED: 1 ash per second,
“bAT LoW”:1 ash per second
EMPTY BATTERY ALARM: Buzzer: 1 beep per minute, LED: 1 ash per
minute, Vibration: 1 per minute and Battery icon: 1 ash per minute
6. Trouble shooting
Problem Possible reason Solution
Can not turn on unit Battery not installed Install battery
Depleted or defective battery Replace battery
Reading abnormally low Calibration Adapter is attached. Remove Calibration Adapter
Incorrect calibration. Calibrate the UNI Sustainable
Buzzer, LED, or vibration
alarm inoperative
Bad buzzer, LEDs, or vibration alarm. Call authorized service center
Blocked alarm port Unblock alarm port

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DETECTOR SPECIFICATIONS
7. Specications
Size 88 (W)x 62 (H) x 33 (D) mm (3.46 x 2.44 x 1.3 in)
Weight 125 g (4.4 oz)
Sensor technology 26 electrochemical sensor options
Temperature -20°C to 50°C ( -4 to 122°F)
Humidity 5% ~ 95% RH (Non-condensing)
Alarm type High alarm, Low alarm, STEL alarm, TWA alarm, adjustable.
Over range alarm, battery low alarm
Alarm signal
Acoustic: 95dB @ 30cm
Visual: 6 bright red LEDs
Vibration alarm
Display LCD Display
Calibration 2-point calibration, zero and span. Power-on zero calibration with user conrmati-
on.
Event log Up to 50 alarm events
Battery Replaceable AA Lithium battery for 3 years of operation
Measurement Diusion
Housing Polycarbonate and rubber
Response time T90 15 sec (CO/H2S/O2)
Others gases vary (technical note 4: Sensor Technical Data Summaries)
IP-Rating IP67
EMI/RFI Compliant with EMC 2014/30/EU
Safety certications UL/cUL: Class I, Div 1, Group A, B, C, D
Class II, Div 1, Group E, F, G
Class III, Div 1 T4, -20° C ≤ Tamb ≤ +50° C
ATEX: II 1 G Ex ia IIC T4 Ga
IECEX: Ex ia IIC T4 Ga
CE: Conformité Européenne
Sensor Life CO/H2S: 5 years
Other sensors: 1 to 2 years as per warranty
Warranty 2 years for UNI Sustainable with O2, CO, SO2, HCN, NO, NO2or PH3sensor
1 year for UNI Sustainable with other sensors

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SENSOR SPECIFICATIONS
Model Detectable Gas Ranges Resolution Article Number
CO
Carbon Monoxide
0 - 500 ppm
0 - 1000 ppm
0 - 2000 ppm
915 mg/m
1829 mg/m³
3658 mg/m3
1 ppm
1 ppm
1 ppm
2mg/m3
2 mg/m3
2 mg/m3
M001-0002-W00
M001-0023-W00
M001-0026-W00
H2S
Hydrogen Sulfide
0 - 50 ppm
0 - 100 ppm
0 - 200 ppm
0 - 1000 ppm
71
142
284
1418
0.1 ppm
0.1 ppm
0.1 ppm
1 ppm
0.1 mg/m3
0.1 mg/m3
0.1 mg/m3
1 mg/m3
M001-0003-W00
M001-0054-W00
M001-0057-W00
M001-0060-W00
O2
Oxygen
0 - 25 %vol
0 - 30 %vol
0.1 %vol
0.1 %vol
M001-0032-W00
M001-0001-W00
SO2
Sulfur Dioxide
0 - 50 ppm
0-100 ppm
53 mg/m3
266 mg/m3
0.1 ppm
0.1 ppm
0.3 mg/m3
0.3 mg/m3
M001-0007-W00
M001-0091-W00
Cl
Chlorine
0 - 50 ppm 147 mg/m30.1 ppm 0.3 mg/m3M001-0004-W00
NO
Nitric Oxide
0 - 250 ppm 312 mg/m31 ppm 1 mg/m3M001-0015-W00
NO2
Nitrogen Dioxide
0 - 20 ppm 38 mg/m30.1 ppm 0.2 mg/m3M001-0011-W00
H2
Hydrogen
0 - 1000 ppm
0 - 2000 ppm
83 mg/m3
166 mg/m3
1 ppm
1 ppm
0.1 mg/m3
0.1 mg/m3
M001-0018-W00
M001-0019-W00
PH3
Phosphine
0 - 20 ppm 28 mg/m30.01 ppm 0.01 mg/m3M001-0016-W00
ETO
Ethylene Oxide
0 - 100 ppm
0 - 200 ppm
183 mg/m3
367 mg/m3
0.1 ppm
0.1 ppm
0.2 mg/m3
0.2 mg/m3
M001-0012-W00
M001-0069-W00
NH3
Ammonia
0 - 100 ppm
0 - 500 ppm
71 mg/m3
353 mg/m3
1 ppm
1 ppm
1 mg/m3
1 mg/m3
M001-0006-W00
M001-0090-W00
ClO2
Chlorine Dioxide
0 - 1 ppm 3 mg/m30.01 ppm 0.03 mg/m3M001-0072-W00
O3
Ozone
0 - 5 ppm 10 mg/m30.01 ppm 0.02 mg/m3M001-0009-W00
HF
Hydrogen Fluoride
0 - 20 ppm 17 mg/m30.1 ppm 0.1 mg/m3M001-0014-W00
HCl
Hydrogen Chloride
0 - 15 ppm 23 mg/m30.1 ppm 0.2 mg/m3M001-0008-W00
HCN
Hydrogen Cyanide
0 - 100 ppm 112 mg/m31 ppm 1 mg/m3M001-0005-W00
CH3SH
Methyl Mercaptan
0 - 10 ppm 20 mg/m30.1 ppm 0.2 mg/m3M001-0077-W00
THT
Tetrahydrothiophene
0 - 50 ppm 147 mg/m31 ppm 0.4 mg/m3M001-0085-W00
C2H4O
Acetaldehyde
0 - 20 ppm 37 mg/m30.1 ppm 0.2 mg/m3M001-0080-W00

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8. Limited Warranty
WATCHGAS warrants this product to be free of defects in workmanship and materials under normal
use and service for two years from the date of purchase from the manufacturer or from the product’s
authorized reseller.
The manufacturer is not liable (under this warranty) if its testing and examination disclose that the
alleged defect in the product does not exist or was caused by the purchaser’s (or any third party’s)
misuse, neglect, or improper installation, testing, or calibrations. Any unauthorized attempt to repair
or modify the product, or any other cause of damage beyond the range of the intended use, including
damage by re, lightening, water damage or other hazard, voids liability of the manufacturer.
In the event that a product should fail to perform up to manufacturer specications during the
applicable warranty period, please contact the product’s authorized reseller or WATCHGAS service
center at [phone] for repair/return information.
WatchGas B.V.
Sextantstraat 61
2908 ZZ Capelle aan den IJssel
[phone]
The Netherlands
[e-mail] - www.watchgas.nl
D e t e c t i on
All rights reserved. No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including
photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the publisher, except in the
case of brief quotations embodied in critical reviews and certain other noncommercial uses permitted by copyright law. For permission
requests, contact WatchGas B.V. V.1.0