WatchGas QGM User Manual

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User Manual

QGM Multi Gas Detector

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D e t e c t i on

Detection

QGM Multi Gas Detector User Manual

Contents

Contents 2

Description 3

Warning 3

Caution 3

1 Product Overview 4

2 Activation 5

2.1 Switch On 5

2.2 Switch O 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 Levels 9

3.6 Dates and Time 10

3.7 Self Test 10

4 Event Log 11

5 Calibration 11

5.1. Fresh Air Calibration 11

5.2. Standard Gas Calibration 12

6 Specication 14

7 Limited Warranty 15

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User Manual Multi Gas Detector QGM

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Detection

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 sulde, combustible gas) 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 modied through WATCHGAS IR­LINK (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.

• 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 dierently 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 specication.

• 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.

• 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 explosion
or re. Changing the sensor or battery with improper replacements, which are not authorized by
the manufacturer, may invalidate the warranty.

• IR communication should be done in a safe area where there is no risk of explosion or re.

• Changing settings in the available software with IR-link may pose a risk, which can result in trauma
or death.

Caution

• Please only use the device 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.

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QGM Multi Gas Detector User Manual

5

7

4

1. Product Overview

DETECTOR COMPONENTS

1. Gas Sensor (O2)

2. Gas Sensor (LEL)

3. Gas Sensor (Dual: CO & H2S)

4. Key

5. IR Port

66

6. Alarm LEDs

7. LCD display

3

2

1

DISPLAY SYMBOLS

High Alarm

Low Alarm

Alarm Condition

STEL Alarm

TWA Alarm

Fresh Air Calibration

Device Stabilisation & Calibration
Succeeded

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Standard Gas Calibration

Remaining Battery

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User Manual Multi Gas Detector QGM

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Detection

2. Activation

2.1 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.

2.2. SWITCH OFF

Press and hold down the KEY button ( ) for three seconds, after the three second countdown the
monitor will turn o.

The device will not be switched o only unless you keep pressing the button for longer than three
seconds.

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