WatchGas QGM Portable Multi-Gas Detector Monitor User Manual
- June 6, 2024
- WatchGas
Table of Contents
WatchGas QGM Portable Multi-Gas Detector Monitor
Description
The QGM is a portable multigas monitor designed to warn the user about the presence of dangerous gases in the atmosphere. The detector indicates the concentration of 4 types of gases (oxygen, carbon monoxide, hydrogen sulfide, combustible gas (LEL) simultaneously on the LCD monitor. It is simple to operate. The QGM alerts the workers of the danger by alarm, LED, vibration when the concentration exceeds the safety gas levels. The device shows the gas concentration in real time and identify the maximum and minimum concentration. The settings values can be modified through WatchGas IR-Link (option).
Warning
-
Please do not replace or change the parts. In this case, we do not guarantee the warranty and safety even though it is under warranty.
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Please remove any debris on the surfaces of the sensor, LED or buzzer hole before use.
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Test the performance of the gas sensor through the gas beyond the alarm level regularly.
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Test the device on a regular basis whether its LED, alarm and vibration function properly.
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Use the device under the conditions instructed, including the temperature, humidity and pressure range. The use environment outside the instruction may cause malfunction or failure.
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The sensors inside the device may indicate the gas concentration differently according to the environment such as temperature, pressure and humidity. Please make sure to calibrate the detector under the same or similar environment to the specification.
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Extreme changes in temperature may cause drastic changes of the gas concentration. (e.g. using the detector where there is a huge gap between the inside and outside temperature).
Please use the device when the concentration becomes stable. -
Severe pressure or impact may cause drastic changes of the gas concentration. Therefore, please use the device when the concentration is stable. Severe pressure or impact may cause also malfunction in the sensor or the device.
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The alarms are set according to the international standard and must be changed by an authorized expert.
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Charging or replacing the battery should be done in a safe area where there is no risk of explosion or fire. Changing the sensor or battery with improper replacements, which are not authorized by the manufacturer, may invalidate the warranty.
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IR communication should be done in a safe area where there is no risk of explosion or fire.
Caution
- Please use after reading the manual carefully.
- The device is not a measurement device, but a gas detector.
- Please stop using and consult the manufacturer if the calibration fails continuously.
- Please test the device every 30 days under the atmospheric environment of clean air without gases.
- Clean the exterior of the device with soft cloth and do not clean it with chemical detergent.
Product Overview
DETECTOR COMPONENTS
- Gas Sensor (O2)
- Gas Sensor (LEL)
- Gas Sensor (Dual: CO & H2S)
- Key
- IR Port
- Alarm LEDs
- LCD display
DISPLAY SYMBOLS
Activation
SWITCH ON
Press and hold down the KEY button ( ) for three seconds, after the three
second countdown the monitor will turn on.
The device will be switched on only when you keep pressing the button for
longer than three seconds.
Once activated, the device will enter the warm up stage to stablize sensors. The warm up process is completed, the device is ready to detect gases.
Caution
A proper calibration is always required before using the device at the work
site. The user shall check whether the device is properly sensing the levels
of dangers of gases and make sure whether the detecting section of the device
is not blocked with materials impairing the detection.
SWITCH OFF
Press and hold down the KEY button ( ) for three seconds, after the three
second countdown the monitor will turn off.
The device will not be switched off only unless you keep pressing the button
for longer than three seconds.
Mode
MEASURING MODE
If the device goes into the normal measuring mode after stabilizing, the gas concentration and the battery power level are displayed on the LCD monitor. Oxygen is displayed in %VOL, combustible gases in %LEL and H2S and CO in ppm unit. When the concentration levels change, the value is displayed in real time, and when the levels exceed the threshold for either LOW alarm or HIGH alarm (or TWA/STEL), the display icons of LOW, HIGH, TWA or STEL blinks regularly and the alarm, LED and vibration activates.
When the device goes to a safe area, the concentrations detected by the device declines and the alarm stops. If the alarm does not clear on its self please acknowledge the alarm by pressing the KEY button ( ) once. Alarm latching options can be configured with the IR-Link software.
DISPLAY MODE
The displays in ten different modes as above are shown in the measuring mode
every time when you press the KEY button ( ).
The display mode consists of ten different informational screens, containing
values for low, high, TWA and STEL alarms, option for viewing and/or clearing
peak values, show device information and calibrate the instrument. Cycling
through the different screens is done by pushing the KEY-button once.
DISPLAY MODE IN DETAIL
ALARM DISPLAY
LOW Alarm Sets Off :
When the user presses Key after noticing that the LOW alarm sets off, the
sound stops, but the vibration and LED alarm remain.
HIGH Alarm Sets Off: The user must leave the area immediately, and the sound alarm/vibration/LED alarm stops when the device goes to a safe area where the concentrations are normal.
TWA Alarm Sets Off:
The alarm sets off when the hourly average levels of the gas concentration
for the last eight hours exceed the TWA concentration, and the sound
alarm/vibration/LED alarm stop when the gas concentration levels reach the
alarm set-off value as the user goes to a safe area.
STEL Alarm Sets Off :
The alarm sets off when the hourly average levels of the gas concentration for
the last 15 minutes exceed the STEL concentration, and the sound
alarm/vibration/LED alarm stop when the gas concentration levels reach the
alarm set-off value as the user goes to a safe area.
Bump Test Interval (WATCHGAS IR-LINK Options): Notices the user on a regular
basis to check the device. Calibration Interval (WATCHGAS IR-LINK Options):
Notices the user on a regular basis to calibrate the sensor.
INITIALIZATION OF DETECTED CONCENTRATIONS
You can see the minimum and maximum values for the concentration levels detected by the device as well as the high TWA and STEL value on the display, and the values can be initialized. Press KEY button ( ) for three seconds on the CLR(Clear) mode on the LCD monitor, and the OK will appear on the LCD monitor to notify the completion of the initialization
CHECK ON ALARM VALUE
Press the KEY button ( ) for three seconds under the ALARM VAL mode and the set value for the LOW alarm is displayed. Press the KEY button one time each to set the alarm set-off value for HIGH alarm, LOW alarm, TWA and STEL alarm in the mentioned order.
INITIAL SETTING CONCENTRATION LEVELS
| Flammables (Ex)| Oxygen (O 2 )| Carbon Monoxide
(CO)| Hydrogen Sulfide (H 2 S)
---|---|---|---|---
LOW| 10 %LEL| 19,5 %VOL| 35 ppm| 10 ppm
HIGH| 20 %LEL| 23,5 %VOL| 200 ppm| 15 ppm
TWA| N/A| N/A| 35 ppm| 10 ppm
STEL| N/A| N/A| 50 ppm| 15 ppm
The set values can be modified on PC through the optional WATCHGAS IR-LINK.
Caution
The values of different gases in the device are set based on international
standards. As such, the alarm set-off values for each gas can be modified upon
the approval and monitoring of the supervisor. The modification may be done
through the optional WATCHGAS IR-LINK.
DATES AND TIME
Press KEY button ( ) under the (YY/MM/DD) mode for 3 seconds and the day/time mode will ap-pear. Press the KEY button ( ) again for 3 seconds under the (D/T) mode and it will go back to previ-ous mode.
- The current time shall be automatically synched with that of the PC when linked with WATCHGAS IR-LINK.
SELF TEST
Press and hold the button for 3 seconds. The device will start the self test checking buzzer, LED, LCD, Motor, Memory, and Temperature.
Event Log
Up to 30 events may be saved and when the list exceeds 30, the oldest data
will be automatically dele-ted. The saved data can be checked when
transmitting it to PC through WATCHGAS IR-LINK.
Data log records the operation status every second and normal data logs do not
last more than 2 months.
| Log Categories | Log Details |
|---|---|
| EVENT (High, Low, TWA, STEL) Alarm | Occurrence time, Duration, Alarm |
Type, Gas Concentration, Serial Number
BUMP TEST Log| Test date, Pass/non-pass, Calibration Gas Concentration,
Detected Concentration
Calibration Log| Date of the Calibration, Type, Calibration Gas
Concentration, Detected Concentration
Data Log| Time, Date of executing IR-LINK, Concentration, Alarm Types,
Options
Calibration
Caution
The initial calibration is executed at WATCHGAS B.V. before device release.
The calibration values are saved in the device which means inaccurate
calibration may impair the accuracy of the device performance. Normally, the
calibration should be done once a year after the purchase and regularly every
six months thereafter.
FRESH AIR CALIBRATION
Press KEY button ( ) for 3 seconds under the gas calibration value mode and the icon signifying fresh air calibration will appear on the LCD monitor with the phrase “CAL ZERO.” Press for another 3 seconds to do fresh air calibration and it takes 10 seconds to calibrate. Press the button during the calibration process to stop the calibration. If you press the button upon the completion, It will return to the fresh air calibration mode, and if you don’t press the button, it automatically enters the measure mode.
Caution
Because it is calibrated on the assumption that oxygen concentration is
20.9%vol, the combustible gas is 0%LEL, and the toxic is 0ppm in the normal
fresh atmosphere, fresh air calibration must be conducted in the absolutely
clear air without any impact of other gases. Fresh air calibration in the
airtight spaces therefore is not recommended. Make sure to avoid operation
under the work environment where people may inhale gases.
FRESH AIR CALIBRATION (CONTINUED)
If the calibration fails, FA (fail) will appear on the display instead of ok. Press the button to enter the initial fresh air calibration mode and it changes into the measure mode if you do not press the button for 3 seconds. If FA continues, please consult Watchgas or the store you purchased the device as it may require the replacement of the sensor or repairs in the device.
STANDARD GAS CALIBRATION
Press KEY button ( ) under the fresh air calibration mode and the icon signifying standard gas calibration will appear on the LCD monitor with the phrase “CAL SPAN.” Press for 3 seconds to do the standard gas calibration and it will be completed automatically in 90 seconds. Press the button during the calibration to stop. If you press the button upon the completion, It will return to the initial standard gas calibration mode, and if you don’t press the button, it automatically enters the measure mode.
If the calibration fails, FA (fail) will appear on the display instead of ok. Press the button to enter the initial fresh air calibration mode and if you do not press the button, it changes into the measuring mode. If FA continues, please consult WATCHGAS or the store you purchased as it may require the replacement of the sensor or repair of the device.
DISPLAY FOR CALIBRATION COUNT
INITIAL STANDARD GASES CONCENTRATION FOR CALIBRATION
Combustible 2.2 %VOL CH4 (= methane 50 %LEL)
Oxygen 18 %VOL Carbon Monoxide 50 ppm Hydrogen Sulfide 10 ppm
The concentration for calibration may be modified on PC through the optional WATCHGAS IR-LINK.
DOCKING STATION
Standard gas calibration can be easily done through Docking Station (option), which holds gas inside.
- Docking Station is used to determine whether the devices functions properly by the bump test before using QGM in the work site.
Technical specifications
| Size | 60 x 40 x 118 mm |
|---|---|
| Weight | 240 g (including clip) |
| Sensor technology | Catalytic or Infrared (LEL), Electrochemical (O2, CO, |
H2S)
Temperature| -20 ~ +50° C
Humidity| 10 ~ 95% RH (Non-condensing)
Alarm type| High alarm, Low alarm, STEL alarm, TWA alarm
Over range alarm, Battery low alarm, Bumptest and calibration due notification
Alarm signal
| Acoustic: (95 db @ 10 cm)
Visual: LCD alarm display, LCD Backlight, Indicator LED Vibration alarm
Display| LCD Display
Calibration| 2-point calibration, zero and span
Data log| Data log 2 months or more
Event log / calibration log / bump log: 30 events
Battery| Type: Lithium-ion rechargeable battery Charging time < 6h
Measurement| Diffusion
Housing| Rugged durable housing with impact proof coating IP67
Response time t90| < 15sec [LEL] / < 15sec [O2]
< 30sec [CO] / < 30sec [H2S]
Accuracy deviation| 2-3%
Operation Time| QGM-CAT: 24 hours, QGM-IR: 2 months
IP-Rating| IP67
Safety certifications
| QGM-IR:
IECEX /PESO: Ex ia IIC T4 Ga
ATEX: II 1G ia IIC T4 Ga
CSA/UL: Class I, Division 1, Groups A,B,C, and/or D, T4
Ex ia IIC T4 Ga
INMETRO: Ex ia IIC T4 Ga
CE: Conformité Européenne
| QGM-CAT:
IECEX: Ex da ia IIC T4 Ga
ATEX: II 1G da ia IIC T4 Ga
CSA/UL: Class I, Division 1, Groups A,B,C, and/or D, T4
Ex da ia IIC T4 Ga
INMETRO: Ex da ia IIC T4 Ga
CE: Conformité Européenne
Sensor Lifetime (expected)| O 2| CO, H 2S, LEL
2 years| 5 years
Warranty| 2 years
Limited Warranty
WATCH AS 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 fire, lightening, water damage or other
hazard, voids liability of the manufacturer.
In the event that a product should fail to perform up to manufacturer
specifications during the appli-cable warranty period, please contact the
product’s authorized reseller or WATCHGAS service center at +31 (0)85 01 87
709 for repair/return information.
WatchGas B.V.
Klaverbaan 121
2908 KD Capelle aan den IJssel+31 (0)85 01 87 709
The Netherlands
info@watchgas.eu –
www.watchgas.eu
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.
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