8
Maintenance
We strongly recommend that the user periodically inspects the instrument to make sure the fault
indicator is not active.
Servicing frequency
Impact
recommends regulator testing of fixed gas installations. This type of test consists of
injecting a standard gas of sufficient concentration in to the sensor in order to trigger the alarm.
Frequency of testing depends on the application the detector is being used for, if a detector does
not react upon contact with gas, it must be repaired and or calibrated, the frequency of
calibration will depend on tests(humidity, temperature, dust etc) calibration should occur at least
once a year.
The site manager is responsible for implementing the safety procedures on his site.
Impact
is
not responsible for implementing safety procedures.
Sensor location (Flying lead version)
Dichloromethane vapor tends to be heavier than air and without the influence of air currents and
negative pressure, will concentrate at lower levels, please consider this when fitting as a spill
alarm.
In general the sensor is mounted at around operator working height externally to the fume
cupboard; try to avoid mounting the sensor too close to the fan extraction as this may unduly
affect the sensor.
Never expose the sensor to Dichloromethane directly, as this will immediately destroy the
sensor.
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