Tequipment NGD8800 User Manual

NGD8800

User’s Manual

Combustible

Gas Detector

INTRODUCTION

This instrument detects combustible gases. It includes a rechargeable
battery pack and charger. It is an excellent instrument to use to
pinpoint combustible gas, vapor, residue or leaks and verify safety
situation of potential hazardous locations.

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SOME APPLICATIONS ARE:

• Gas lines and pipes

• Propane gas refill station

• Fuel in marine bilges

• Exhaust and fuel leaks

• Liquid or gas fired heating systems

• Check manholes for safety

Note: Although the unit will respond to high levels of Carbon
Monoxide, it should not be used as a detector for this gas in normal
room or working atmospheres. It is used to pinpoint a leak as
described in the Operating Instructions.

HOW IT WORKS:

After the automatic warm up, when the sensor of the instrument
detects vaporous and gas from combustible compound, the LED signal
will light up and change with the increasing tick rate to locate the
combustible leaks. This helps the user to take effective measures or
actions to clear potential hazard.

FEATURES:

• Leak size indication (Audial and Visible)

• Auto fast warm-up

• Adjustable sensitivity

• Low battery indication

• Rechargeable battery

• Charge protection to prevent overcharge or over current

• Double color LED indicates charge state

• ON/OFF switch

• Sensing tip

• 14" Flexible gooseneck probe - unfasten probe knob to readjust
rotation

Includes: Rechargeable battery, charger and hard carry case

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A

Speaker

B

Charge state indicator

C

Leak size indicator-the larger the concentration, the more LED will
be lit

D

Sensitivity adjust knob-turn clockwise to increase sensitivity, turn
counter clockwise to decrease sensitivity

E

Power indicator-LED blinking indicates low battery. Please turn off
the unit and recharge the battery.

F

ON/OFF switch

G

Sensing tip

H

Flex probe-probe knob may be loosened to rotate the probe

I

Battery compartment-unscrew to open battery door and install the
battery pack with the contact upwards. Close battery door and
fasten the screws.

J

Probe knob

(Figure 1)

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OPERATION INSTRUCTIONS:

1. Turn the unit off and turn the sensitivity knob fully counter

clockwise.

2. Turn the unit on in a non-contaminated atmosphere with the slide

switch, the power indicator will light up. Power indicator shows the
battery power is sufficient, it ensures precise detection.

3. After the unit is turned on, it will auto warm-up within 110

seconds, a ticking sound will be heard.

4. Adjust the sensitivity control until the first leak indicator lights up,

and the ticking frequency increases.

5. Approaching known leak source, the leak size indicate lights will

increase with the rapid ticking. Above steps are necessary to
ensure the unit is working correctly. Now the unit is ready for use.
If the battery power is in sufficient state, but the sensor
approaches known leaks without any responses, do not use the
instrument, please return for repair.

6. In conjunction with the increased tick rate, the leak size indicator

will light from bottom to top as combustible gas concentration
grows.

7. Search the general area of the leak. When a detectable compound

enters the sensor, the tick rate speeds up.

8. If you are searching for a heavy leak source, please lower the

sensitivity in a clear air by turning the adjustable knob (until the
leak size indicator turns off).

TO CHARGE BATTERY:

1. During operation, if the power indicator is blinking, it is necessary

to charge the battery.

2. Install the battery into the battery compartment properly, cover

battery door and fasten screws.

3. Turn off the instrument, connect the charger into a power socket of

50-60 Hz and insert the plug into the jack on the bottom of the
instrument. A green charge indicator indicates that the battery
power is low and still under charge(a new battery needs to be
charged for 16 hours before usage)

4. When the charge indicator turns from green to orange the battery

is fully charged. Please take it off the charger.

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Insert the plug into the jack of the instrument

Note: Battery must only be
charged or replaced in an area
known to be non-hazardous.
Make sure the charger plug
is completely plugged into
the unit.

CAUTION

1. Do not use the instrument in an area of extremely high level of

combustible gas.

2. The gas/vapor of organic solvent might interfere with the function

of the unit. During detection,please eliminate the influence of the
organic solvent.

3. In order to ensure correct operation and indication, the unit should

be switched on and warm-up in non-contaminated atmosphere.

4. Charge the unit at least 16 hours before it is used. If it is not used

for a long time, the unit will take a long time to warm up.

5. Do not charge the battery over 24 hours.

SPECIFICATIONS

Detect Item: Combustible gas
Sensitivity: Variable, as low as 5ppm (gasoline)
Response Time: Instantaneou
Warm up time: <110 second (in 25°C, 60%RH
Continuous operation time: Up to 2 hours (slightly vary with operation)
Low battery indication: 5±0.3V
Operation temperature: 0° to 110°F (0° to 52°C)
Power supply: 1200mAh, 6V Ni-MH rechargeable battery
Weight/Size: 17.4 oz. (492 g); 9.3"x3.4"x1.8" (235 x 86 x 46 cm)
Standard accessory: (1) Tool box

(1) Charger: (DC10V AT 240mA LOADING)

(Figure 2)

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