General Tools CGD900 User Manual

COMBUSTIBLE GAS

LEAK DETECTOR

CGD900

User’s ManUal

MsHa “IntrInsIc safety” approved (In MetHane-aIr only)

Please read this manual carefully and thoroughly before using this product.

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CONTENTS

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

What’s in the case . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 4

Operation Instructions . . . . . . . . . . . . . . . . . . . 4 –5

Maintenance, Troubleshooting and

Customer Service . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Changing the batteries . . . . . . . . . . . . . . . . . 6

Replacing the sensor . . . . . . . . . . . . . . . . . . 6

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Replacement Parts and Supplies . . . . . . . . . . . . . 7

Warranty Information . . . . . . . . . . . . . . . . . . . . . . . 8

Return Policy . . . . . . . . . . . . . . . . . . . . . . . . . 9

2

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INTRODUCTION

Thank you for purchasing General Tools & Instruments’ CGD900 Com­bustible Gas Leak Detector with MSHA “Intrinsically Safe” approval.
Please read this user’s manual carefully and thoroughly before using
the instrument.

The CGD900 uses proven heated-sensor technology to detect the
presence of most combustible gases, including methane, propane,
butane, acetylene, and alcohol and gasoline vapors (see p.7 [Specifi­cations section] for a longer list). In addition, its unique front-panel
readout indicates the relative size of a gas leak from 1 to 9.

This reading makes it easier to pinpoint the source of a leak and helps
you decide whether it is large enough to be worth plugging. The read­ing, which is independent of the unit’s sensitivity level, rises and falls
with the amount of combustible gas sensed at the end of the CGD900’s
17-inch-long flexible and obedient probe. The maximum value is dis­played when the tip of the probe is at the source of the leak.

The CGD900 is powered by four “AA” Alkaline (non-rechargeable)
batteries.

KEY FEATURES

• CE certified to meet European Union requirements

• MSHA Certified “Intrinsically Safe” in Methane-Air only

• Durable, stable sensor with industry-first two-year warranty

• Methane sensitivity of <5 ppm

• Calibrates automatically

• Unique numeric leak size indicator on front panel

• Three adjustable sensitivity levels

• Comfortable Sanoprene rubber grip

3

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WhAT’S IN ThE CASE

The CGD900 comes fully assembled in a padded carrying case, along
with a leak test vial that enables you to check that the unit is performing
properly. See page 5 for instructions for performing this test titled
“Using the Leak Test Vial”.

SAFETY INSTRUCTIONS

WARNING: Never use a flame to illuminate an area where combustible
gases could be present.

OPERATING INSTRUCTIONS

All of the CDG900’s controls and indicators are on the unit’s front panel.
Familiarize yourself with the nomenclature in the picture below before
turning on and operating the unit.

Before the CGD900 can be put to use, it must execute a three-step
startup sequence:

1. TURN ON. Press the on/off button once to turn on the unit, and
again to turn it off.

2. WARM UP. Once the unit has been
turned on, it automatically begins heating the
sensor. During warm up, the digital leak size
indicator flashes “0”, the sensitivity level indi­cators illuminate in sequence, and the unit
beeps slowly and repeatedly. The warm up
cycle normally takes less than 10 seconds.

3. READY. The CGD900 is ready to begin
searching for leaks when the display stops
flashing “0”, the green LED for NORM lights up,
and the audio “beep” increases in frequency. To
silence the beep, push the Mute button again.
(Note: It takes a few seconds to restore the
sound if the Mute button is pushed quickly and
repeatedly.

4

Digital leak
size indicator

Low battery
indicator

Sensitvity
level LEDs

Audio mute
& sensitivity
buttons

Power
on/off button

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