WatchGas QGM User manual

USER MANUAL
Portable multi gas detector
QGM
we watch gas where you can't

CONTENTS
DESCRIPTION 3
WARNING 3
CAUTION 3
1. PRODUCT OVERVIEW 4
2. ACTIVATION 5
2.1 Switch On 5
2.2 Switch Off 5
3. MODE 6
3.1 Measuring Mode 6
3.2 Display Mode 6
3.2.1 Display Mode in detail 7
3.3 Alarm Display 8
3.4 Initialization of detected concentrations 9
3.5 Check on Alarm Value 9
3.5.1 Initial Setting Concentration Levelsl 9
3.6 Dates and Time 10
3.7 Self Test 10
3.8 Check on bump test interval date and Latest bump test
date 11
3.9 Check on span calibration interval date and Latest span
calibration date date 11
4. EVENT LOG 11
5. CALIBRATION 12
5.1 Fresh Air Calibration 12
5.2 Standard Gas Calibration 13
5.3 Bump Test 14
6. SPECIFICATION 15
7. LIMITED WARRANTY 16

3
DESCRIPTION
QGM is a portable multi gas detector to warn the dangerous environment related to the
gases. The detector indicates the concentration of 4 gases oxygen, carbon monoxide,
            
simple to operate. The device alerts the workers of the danger by alarm, LED, vibration
when the concentration exceeds the safety gas levels The device shows the gas concen-
tration in real time and identify the maximum and minimum concentration. The settings

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.
• Please remove any debris on the surfaces of the sensor, LED or buzzer hole before use.
• Test the performance of the gas sensor through the gas beyond the alarm level regularly.
• Test the device on a regular basis whether its LED, alarm and vibration function properly.
• 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.
• The sensors inside the device may indicate the gas concentration differently accordin g to
the environment such as temperature, pressure and humidity. Please make sure to cali-

• 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 temperatu-
re).
• 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.
• The alarms are set according to the international standard and must be changed by an
authorized expert.
• Charging or replacing the battery should be done in a safe area, where there is no risk of

not authorized by the manufacturer, may invalidate the warranty.
• 
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.

Portable multi gas detector
QGM
4
DETECTOR COMPONENTS
1. Gas sensor (O
2. Gas sensor (LEL)
3. Gas sensor (Dual: CO & HS)
4. 
5. 
6. Alarm LED
7. LCD display
8. Buzzer
1. PRODUCT OVERVIEW
4
3
7
1
2
DISPLAY SYMBOLS
8
6
6
6
6
High alarm
Low alarm
Alarm condition
STEL Alarm

Fresh Air Calibration
Device stabilization &
Calibration succeeded
Standard Gas calibration


5
 
2. ACTIVATION
2.1 SWITCH ON
Press and hold down the  ( ) and the device will be switched on along with the three
seconds countdown.
NOTE: 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.
2.2 SWITCH OFF
 ( ) and the 3, 2 and 1 in the mentioned order will appear on the

NOTE: The device will not be switched off only unless you keep pressing the button for longer
than three seconds.

Portable multi gas detector
QGM
6
3. MODE
3.1 MEASURING MODE
If the device goes into the normal measuring mode after stabilization,
the gas concentration and the battery power level are displayed on
the LCD monitor. Oxygen is displayed in %vol, combustible gases in
%LEL and H
the value is displayed in real time, and when the levels exceed the
          
           
alarm, LED and vibration activates.

the device declines and the alarm stops. Even after going to a safe
area after the alarms set off, the icon of the alarm does not go away, and you must push the Key
 ( ) to make it go away.
3.2 DISPLAY MODE
The displays in ten different modes as above are shown in the measuring mode every time when
you press the ( ).

7
3.2.1 DISPLAY MODE IN DETAIL
LCD DISPLAY
IMAGES DESCRIPTION
• 
• Display the current gas levels of the atmosphere and the battery
power level
• The minimum gas concentration detected by the device.
*In an ambient air, the Oxygen level normally indicates 20.9%vol.
• The maximum concentration detected by the device.
*In an ambient air, the Oxygen level normally indicates 20.9%vol.
• Acceptable hourly average exposure levels of the toxic gases for the

• Acceptable average exposure levels of the toxic gases for the last 15
minutes (Short Term Exposure Limit)
• 
• Check the current setting values manually.
(Low alarm, High alarm, T
• 
• Check on set SP
• 
• Current Date and Time
• Check bump and calibration interval remaining days
• Latest bump date and calibration date check.

Portable multi gas detector
QGM
8
3.3 DISPLAY MODE
TYPE 
CONDITION LCD DISPLAY ALARM SOUND & VIBRATION DISPLAY
 
alarm value
icon & gas
concentration levels
displayed
HIGH Alarm Exceed HIGH
alarm value
icon & gas
concentration levels
displayed
 

icon & gas
concentration levels
displayed
STEL Alarm 
STEL alarm value
icon & gas
concentration levels
displayed
Bump Test 
Bump Test Stops after Bump Test
Execute
Calibration

Calibration Stops after Calibration
LOW Alarm Sets Off:
sound stops, but the vibration and LED alarm remain.
HIGH Alarm Sets Off:            

normal.
TWA Alarm Sets Off: The alarm sets off when the hourly average levels of the gas concentration

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

alarm stop when the gas concentration levels reach the alarm set-off value as the user goes to
a safe area.
 
device.

the sensor.

9
3.4 INITIALIZATION OF DETECTED CONCENTRATIONS
You can see the minimum and maximum values for the concentration levels detected by the

Press  ( 
will appear on the LCD monitor to notify the completion of the initialization.
3.5 CHECK ON ALARM VALUE
Press the  ( ) for three seconds under the ALARM VAL mode and the set value for
 one time each to set the alarm set off value for

3.5.1 INITIAL SETTING CONCENTRATION LEVELS
INFLAMMABLES

OXYGEN

CARBON MONOXIDE

HYDROGEN SULFIDE

 10 %LEL 19% 30 ppm 10 ppm
HIGH 30 %LEL 23% 60 ppm 20 ppm
 30 ppm 10 ppm
STEL 200 ppm 15 ppm

3 sec.

Portable multi gas detector
QGM
10
CAUTION
The values of different gases in the device are set based on the international



3.6 DATES AND TIME
Press the button ( 
appear. Press the button ( 
previous mode.


3.7 SELF TEST
3 sec.

11
Press and hold the button ( ) for 3 seconds. The device will start the self test checking buzzer,
LED, LCD, Motor, Memory, and Temperature.
3.8. CHECK ON BUMP TEST INTERVAL DATE AND LATEST BUMP
TEST DATE
Press the   ( ) for three seconds under the BUM CAL DATE and BUM DATE will

for interval is displayed, Bump test interval date & latest bump test date will be appeared in the
mentioned order.
3.9. CHECK ON SPAN CALIBRATION INTERVAL DATE AND LATEST
SPAN CALIBRATION DATE
Press the  ( ) for three seconds under the CAL DATE when you set the interval date

will be appeared in the mentioned order.
4. EVENT LOG
Up to 30 events may be saved and when the list exceeds 30, the oldest data will be automatically

Data log records the operation status every second and normal data logs do not last more than
2 months.
LOG CATEGORIES LOG DETAILS
 
BUMP TEST Log 
Calibration Log Date of the Calibration, Type, Calibration Gas Concentration, Detected Concentration
Data Log 
3 sec.
3 sec.

Portable multi gas detector
QGM
12
5. CALIBRATION
CAUTION
          
calibration values are saved in the device which means inaccurate calibration

should be done once a year after the purchase and regularly every six months
thereafter.
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.
5.1. FRESH AIR CALIBRATION
Press   ( ) for 3 seconds under the gas calibration value mode and the icon ( )

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.

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
-
ment of the sensor or repair of the device.
3 sec. 3 sec.

13
5.2. STANDARD GAS CALIBRATION
Press  ( ) under the fresh air calibration mode and the icon ( ) signifying standard

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.
             
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

sensor or repair of the device.
DISPLAY FOR CALIBRATION COUNT
INITIAL STANDARD GASES CONCENTRATION FOR CALIBRATION
COMBUSTIBLE OXYGEN CARBON MONOXIDE HYDROGEN SULFIDE
Concentration 50%LEL(CH4) 17 %Vol 100 ppm 25 ppm

3 sec.

Portable multi gas detector
QGM
14
5.3. BUMP TEST
Press  ( ) under the Cal span mode and “BUMP TEST” will appear on the LCD monitor.
Press key button for 3 seconds to do the bump test and it will be proceeded automatically in 45


DOCKING STATION
Standard gas calibration can be easily done through Docking Station option which hold s gas in-
side
*Docking Station is used to determine whether the devices functions properly by the bump test
before using QGM in the work site.
3 sec. 3 sec.

15
6. SPECIFICATION
MODEL QGM
Measure Gas Combustible OCO HS
Detecting
Method 
Measure
Mechanism
Catalytic: (QGM
Catalytic)
)
Electrochemical Electrochemical Electrochemical
 0~100 %LEL 0~30 %vol 0~500 ppm 0~100 ppm
Sensor life

2~ 3 years
(Pellistor)
< 3 years > 5 years > 5 years
    
Accuracy 
 1%LEL 0.1 %vol 1 ppm 0.1 ppm
Operation 
Display Digital LCD display, LCD Backlight, Indicator LED
Alarm Visual: LCD alarm display, LCD Backlight,

Data Saving
Event Log: 30 EA,
Calibration Log: 30 EA
Bump Log: 30EA, Data log
Two Months or longer
How to Fix Belt Clip
Temperature 
Humidity 
Battery Type


Type: Lithium I on Charger


Max Charging Voltage: 6.3V
Battery Duration 
Case 
Size 
 240 g
Options 
 QGM Catalytic: Ex d ia IIC T4 , IP 67


Portable multi gas detector
QGM
 16
COMPATIBLE OPTIONS
7. LIMITED WARRANTY
            
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

of the manufacturer.



  Docking Station





www.watchgas.com
[email protected]