Extech FG100 Operating Manual
User's Guide Model FG100
Gas Leak Detector
Introduction
Congratulations on your purchase of the Extech FG100 Gas Leak Detector. The FG100
detects the presence of propane or natural gases. Careful use of this detector will provide
years of reliable service.
Description
Specifications
Measurement ranges Propane: 500 to 6500 ppm; Natural gas: 1000 to 6500 ppm
Power 2 x ‘AAA’ 1.5V batteries; 200mA consumption; 4 hour battery life
Operating conditions 50 to 122
Storage conditions 41 to 131
Dimensions 7.1” Length; 0.8”: diameter” (180mm length; 21mm diameter)
Weight 1.6 oz (46g)
Application
This device can be used to detect gas leaks from small liquid gas containers such as camping
cartridges, lighters, soldering torches, etc. This device is not
industrial use, or complex systems such as heaters and ovens.
Safety
Do not get the sensor wet. Avoid extreme dampness
Do not expose the device to high temperature, high humidity, or strong vibration
Avoid mechanical stress to the device. Do not touch the sensor
Clean with a soft, dry cloth or brush. Do not use liquid, abrasives, solvents, etc.
Battery Installation/Replacement
When the status indicators fail to light with the ON-OFF switch in the ON position, replace the
two (2) ‘AAA’ batteries. Slide the battery compartment cover off (rear of the detector) to access
the batteries. Replace the batteries observing polarity and close the compartment. Remove the
batteries if the detector is to be stored for long periods of time.
o
F (10 to 50oC); < 95% RH non-condensing
o
F (5 to 55oC); < 95% RH (non condensing)
suitable for continuous operation,
Operation
Static Electricity
The metal conductor protruding from the back of the detector is used for static tests. Before
detecting a leak (and at a safe distance from the testing area), touch the conductor with one
hand and, at the same time with the other hand, touch an earth grounded metal object such as a
heater or cold water pipe. If the user is statically discharged, the yellow indicator will light for a
short period. If there are strong charges present, gas detection measurements should not be
taken since discharges could ignite leaking gas.
Leak Detection
1. Remove the protective sensor cap.
2. Slide the ON/OFF switch to the ON position. The Red indicator will light and the audible tone
will sound for a short period of time and then the Green indicator will light.
3. Perform the static electricity test.
4. Trace the sensor around the source of the suspected leak.
Indicators
Yellow used for static electricity tests.
Red lights when gas is detected (along with an audible beep).
Green lights in clean ambient air
When Gas is Detected
When a leak is detected, the red indicator will light and an audible tone will sound. Open all
doors and windows. Avoid open fire and sparks, leave the room, and do not operate any
electrical switches (light switches, etc.). If possible, turn off the gas supply. When the
concentration of gas falls below detectable limits, the red indicator and audible tone will no longer
activate when tests are taken. Note that false alarms are possible due to the presence of aerosol
sprays, tobacco smoke, etc.
Testing the Gas Leak Detector
Hold a gas lighter close to the sensor and allow the unlit lighter to leak a small amount of gas. If
the detector is working correctly, the red indicator will light and the audible tone will sound. If the
light and sound do not activate, the batteries may be weak or the unit is defective.
Note on Liquefied Gases
Liquefied gases are heavier than air and therefore settle on the floor. For this reason, the highest
concentration of gas is close to the ground.
Warranty
EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year
from date of shipment (a six month limited warranty applies on sensors and cables). If it should become necessary to return the
instrument for service during or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210
for authorization or visit our website at www.extech.com (click on ‘Contact Extech’ and go to ‘Service Department’ to request an R A
number). A Return Authorization (RA) number must be issued before any product is returned to Extech. The sender is responsible
for shipping charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not apply t o defects
resulting from action of the user such as misuse, improper wiring, op eration outside of specification, improper maintenance or repair,
or unauthorized modification. Extech specifically disclaims any implied warranties or merchant ability or fitness for a sp ecific purpose
and will not be liable for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or
replacement of the product. The warranty set forth above is inclusive and no other warranty , whether written or oral, is expressed or
implied.
For the latest version of this User’s Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
All rights reserved including the right of reproduction in whole or in part in any form.
Technical support: Extension 200; E-mail: support@extech.com
Support line (781) 890-7440
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
Copyright © 2008 Extech Instruments Corporation.
FG100 V2.0 1/08
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