BENETECH GM8800A Gas Detector Instruction Manual

MODEL: GM8800A
**Combustible Gas Detector Instruction Manual**

Before use

Check up
Thanks for your purchasing our product, please check the following components after you unpack the box. If there is any missing or wrong page manual, please contact the local dealer.

Safety instruction

For your safety, please read this manual before operation.
: This operation may induce physical hazards to users. Please be careful.
: This operation may cause damage to the instrument. Please be careful.
**** Warning!
If there is explode accident happening:

• Cut off all the potential gas resource
• Keep the rescuing area ventilated and no potential combustible gas exists.
• Switch off all the power connections.
• Evacuate all the people in the area
• Report to the authorities immediately

In daily work, please keep the work environment ventilated, for good ventilation can ensure that combustible gas will not accumulate

Warnings and Precautions

Improper operation or improper environment for usage may cause accidents.
The environments with high or low oxygen concentrations may cause inaccurate measurements.
Other impurities such as gas or water vapor may affect the normal measurement of the combustible gas sensors.
The sensor aperture must be kept clean, or impurities may cause inaccurate measurements.
When replacing the battery, be careful not to install batteries backward, otherwise, it may cause the danger of electric leakage and accidents.
If the instrument breaks down, please turn to the professional staff of our company for help, other people should not change components and wiring.
Do not disassemble the instrument in hazardous environments.
Do not disassemble the battery in explosive environments.
This product complies with the following procedures and calibration: JJG693-2004, GB3836. 1-2010 GB3836. 4-2010, GB4208

Brief

This product one-hand-operated can detect the leaked gas indoors with its slim gooseneck sensor, and alarm if gas leaks.

Technical index

Lel means the lowest explosive level that the gas may explode in the air when being fired.

Application and characters

The hand-held design allows you to operate easily and the visual and acoustical alarm can detect the gas resource precisely. And the adjustable beep rate helps to decrease the polluted gas density in the air.

• High sensitivity
• Quickly find the resource of the leakage
• Indicating the leakage via alarming bulb
• High precision sensor able to detect slight gas leakage
• Quick response
• Monophony earphone socket
• 16-inch long gooseneck

International safety knowledge

**** This operation must refer to instructions. Please be careful.
Complying with EU standard Explosion-proof sign: Ex ib IIB T3 Gb

Specification

1. Response time: 2 seconds
2. Warm-up time:60seconds approx(25 ( . 60%RH environment)
3. Continuous operating time: 8 hours (varying with operating status)
4. Low battery indication:3-±0.2V
5. Operating environment temperature:0-50 C
6. Detectable control
7. Sensor reset
8. Power & Alarm LED indication
9. Power:3*1.5V LR14 batteries
10. Working current: about 150mA
11. Product size :7651.4220mm

Operation environment
To keep the reliable and precise output, please operate the product in the environment conditioned below:
Temperature: 32-120 F. 0-50
Humidity: 10-90%RH (non-condensation)

Operation manual

Device and indication device

1. Sensor tip and a built-in sensor
2. Gooseneck
3. Alarm indication
4. Power indication
5. Power on the toggle switch
6. Earphone socket
7. Beep sound rate adjustment
8. Sensor clip
9. Handle
10. Battery door

Operation instruction
Open the unit in a clean environment by switching to the on position, when the battery is full the green LED will be on and the unit is to be warmed up for 1 minute and reset to zero automatically. The persistent sound of the ticking alarm lies in that the sensitivity of the rotary dial adjusted beforehand is not down to the lowest level.

Beep rate(sensitivity) adjustment
Before operating this product, a quick functional test must be performed. Adjust the ticking rate to a non-alarm level and the instrument will detect flammable gas after warm-up. When the probe is exposed to a known gas source such as unburned lighter gas (butane) or flowing flammable gas, the “ticking” sound begins to intensify when the sensor at the top of the probe detects flammable gas, and the instrument will set off the alarm, with warning light (red light) flashing. Continuous ticking will arise due to gas concentration if the operating environment needs to be quiet, or the environment is noisy, you can use the headset. (Insert the headset into the headphone jack on the upper left side of the instrument). Please be noted that the alarm and beep may sound very loudly. If the ready led or the battery is too low please replace the battery immediately. A low battery may impact the safety and reliability of the product. The beep sounds quicker and quicker if the sensor is approaching the gas resource closer and closer. And you may use the dial at the center of the product to control the beep rate. Rotate the knob anticlockwise to slow down the beep sound rate. In a clean environment, the typical rate is set within a range 4-8 times per second, when the sensor is approaching the gas resource, it sounds quicker, to isolate the gas resource, and rotate the know anticlockwise slightly.

Replacing battery(Note: Please replace batteries in safe environments)
If the instrument has the following status, Please replace the 1.5V LR14 alkaline batteries:

• The yellow READY LED is out
• No other LED is on as turning on the unit.

Follow the steps below to replace the battery.

1. Put the unit back upside
2. Take off the protective cover of the unit to open the battery door.
3. Take out the battery
4. Insert 3 fresh batteries.
5. Please do not install batteries backward.

Replacing sensor
The sensor of the unit can provide reliable service for years, it must be replaced only if the sensor is immersed in liquid or Long-term storage at a high temperature and acid environment.

1. Turn off the unit
2. Take out the sensor cap
3. Take out the old sensor
4. Replace them with a new sensor and cap
5. Restart the instrument and carry out the ‘operation check’ step

Others

Gas detecting
The instrument is an advanced detection apparatus that can be used to test the leakage of a variety of flammable gases.
Combustible gas
The following list only shows partial gases can be detectable.

Keep-up and maintenance

1. Keep-up: U Keep-up and replacement of battery: Take out the battery from the unit which will not be operated for a long time less the leakage of battery damage and erodes the battery contact metal.
   ° Case cleaning: Use only fresh water to clean the case of the product, forbidden to use any erosive liquid such as alcohol etc.
   ° Make sure the sensor is clean and use a soft brush to clean the sensor aperture.
   ° Never impact it or operate and store it in a humid environment.
   Do not store the product in the environment below:
   a. Humid or dusty environment
   b. The high density of salt or sulfur
   c. The environment is full of other chemical gas
   d. High temperature or humidity, or environment in direct sunlight.

2. Maintenance:
   Please refer to the guaranty card offered. We hold no responsibility for the product due to the following reason: Unauthorized disassembly of the product, improper transportation after purchasing and wrong storage, damage due to abuse, failure to provide purchasing proof or unauthorized amendment on the purchasing invoice/guaranty card

3. Claim:
   a. We reserve the right to change the specification or instruction manual of the product without further notification.
   b. Old battery dealing must comply with local laws and regulations.

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