1
General information
Any use of the Dräger GS3 requires a full understanding and
strict adherence to the instructions of this manual and to the
national and international regulations and standards. The
instrument is only to be used for the purposes specified in this
manual.
This instruction manual is part of the instrument. Do not
dispose of the instructions for use. Ensure that they are
stored and used appropriately by the product user.
Do not throw used batteries into fire or try to open them by force.
Dispose of the batteries in accordance with national regulations.
2
The leakage detector
The Dräger GS3 is an electronic leakage detector that detects
different combustible gases.
Do not use the Dräger GS3 as monitoring device for your
individual safety!
2.1
Switching on
Switch on the Dräger GS3 by pressing the push-button for a short
time (< 1s). After switching on, the battery capacity will be shown
by flashing LEDs:
4 flashes: batteries full
1 flash: batteries empty
The warm up is shown by continuous flashing LEDs.
The readiness for operation is shown by constant flashing LEDs
and a constant ticking
(1 x every 2 seconds).
This gas leak detector uses a semiconductor sensor with a high
sensitivity to methane and other combustible gases.
In general, such sensors require a certain warm-up time after
switching on until they show a stable zero signal. The warm-up
time is needed to process substances that have diffused into the
sensor during storage of the instrument. The Dräger GS3 is
designed to be ready for operation in the shortest time possible.
The default warm-up time is 30 seconds. Depending on storage
and environmental conditions, the default warm-up time may not
be sufficient. In such a case, the Dräger GS3 extends the warm-
up time to up to 300 seconds. If this extended warm-up time is still
not sufficient, the Dräger GS3 outputs an error signal and the
sensor is defective.
This product must not be disposed of as
household waste. This is indicated by the ad-
jacent icon. You can return this product to Drä-
ger free of charge. For information please
contact the national marketing organisations
and Dräger MSI GmbH.
1 gas sensor
2 flashing LEDs
3 push-button
4 battery case
1
2
3
4
2.2
Detecting a leak
Position the instrument in such a way that the gas sensor is
purged by ambient air. By rapprochement to a leak and
increasing gas concentration, the flashing and ticking rate will
increase. By removing from a leak and decreasing gas
concentration the signals will become slower.
If the signals become fast, you can slower them by shortly
pressing the push-button. The signals will slow down to 1x speed
every 2 seconds. With increasing gas concentration, the signal
rate will rise. With decreasing gas concentration, the zero point
will re-adjust automatically.
In case of a gas leak, gas plumes can form in the ambient air
that are heavily influenced by air circulation.
2.3
Switching off
Switch off the Dräger GS3 by pressing the push-button for a
longer time (> 3s). The Dräger GS3 switches off automatically 10
minutes after the last key press or the last detected signal.
2.4
Changing the batteries
Unscrew the battery case. Insert the new AAA batteries into the
battery case. Make sure the positive pole is facing the gas
sensor. Screw down the battery case.
By doing this, the Dräger GS3 will switch on automatically.
2.5
Functional test of the leakage detector
Hold a gas lighter close to the gas sensor, let gas escape out of
the lighter without igniting the flame. The signal rate should
increase.
3
Troubleshooting
Technical data
Operating conditions
3.1
Service and maintenance
Regular maintenance of the Dräger GS3 is not necessary. To
ensure that the instrument is working properly, perform the
functional test regularly.
Problem
Remedy
LEDs light for 10 seconds after
warm-up, after that the instru-
ment switches off.
Restart the device.
LEDs light for 2 seconds and
then are off for 2 seconds befo-
re warm-up.
Restart the device while in
fresh air.
Instrument is not turning on.
Change batteries.
Measuring range
0 – 10.000 ppm (methane)
Sensitivity
< 50 ppm (methane)
Warm-up time
norm. 30 seconds
Response time
< 2 seconds. (to 10 % L.E.L.)
Signal
audio and visual (1 x every 2 se-
conds w/o gas)
Sensor
semiconductor
Detectable gases
natural gas, methane, liquid gases,
propane, butane, gasoline, jet fuel,
alcohol, various thinners, acetone,
hydrogen
Humidity
10 – 90 % r.F. not condensating
Ambient temperature
+5 – +45 °C
Storage temperature
-20 – +50 °C
Power supply
2 AAA batteries
Battery life
approx. 6 h
Dimensions
170 mm x 16 mm x 19 mm
Weight
approx. 50 g
