The non-display version provides a cost effective monitoring solution
in situations where a local display of the gas level is not required.
The unit provides a 4 to 20 mA output.
Calibration of the FGD10B can be carried out simply by using ZERO
and SPAN buttons inside the instrument provided that the concentration
of the calibration gas is the same as that used for factory calibration
of the detector (refer to the instrument calibration certificate for
details).
Alternatively, the purpose designed plug-in hand held
configuration unit shown below may be used together with any appropriate
test gas concentration.
FGD10B Calibration Unit
Calibration of the unit requires the removal of the front cover of
the flameproof enclosure and therefore must only be carried out under
either of the following conditions:-
- In a safe area where there is no risk of the presence of an explosive gas.
- Within the hazardous area by authorised personnel under
controlled conditions after it has been established that no flammable
gases are present in the area. Note that a management or health and
safety department permit may be required for this to be carried out.
To carry out a calibration, the operator must open
the front cover of the unit, plug in the calibration unit and then
present zero and span gases to the sensor during the course of the
calibration procedure.