Important Notes - Wohler GS 220 Bedienungsanleitung

Important notes

3 Important notes
WARNING!
The Wöhler GS 220 may never be used in an environment where there is the risk of ex-
plosion. If the environment is suspected to conglomerate potentially explosive gases, in
no case you must use the Wöhler GS 220. Batteries may not be taken from the device
and/or be changed.
ATTENTION!
The Wöhler GS 220 indicates the approximate concentration of gas in a 5-level LED.
However, the indication may be rather imprecise, according to the sensor, age, ambient
conditions etc. The Wöhler GS 220 is a gas leak detector, and as such it detects leaks,
but it does not measure the exact concentration of gas.
High-density exposure to corrosive materials such as H2S, SOx, Cl2, HCl, etc. may
cause corrosion or breakage of the lead wires or heater material.
Sensor drift may occur when the sensor is contaminated by alkaline metals, especially
salt water spray.
Sensor drift may occur due to soak or splash the sensor with water.
If water freezes on the sensing surface, the sensor would crack and alter characteris-
tics.
This meter requires to operate under around 21% ambient oxygen environment in order
to function properly. This meter cannot work well in zero or low oxygen atmosphere.
Light condensation under indoor usage should not be a problem for sensor. However, if
water condenses on the sensor's surface for a while, the sensor characteristics may still
drift.
Sensor performance may be also affected if exposed to a high density gas for a long
time, regardless of the powering condition.
When meter is off for a long time, the sensor may show a drift in resistance according to
the storage environment. So, the meter should be stored in a sealed bag with clean air.
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