System Check; Calibration And Adjustment; Performance Of Calibration - Extron electronics ExSens Instruction Manual

Instruction Manual
ExTox Transmitter ExSens(-I) and Sens(-I)
of measured values at application of test gas is determined and compared with the
nominal values. In case the settings are corrected additionally the process is called
adjustment. In case of combination with sampling systems their correct function
has also to be checked. It is not necessary to trigger the switching functions.
A functional check should only be done, if there is no alarm present. You should
ensure the same environmental conditions during this process as valid for the
measuring process. For example a transmitter used in cold storage houses should
not be adjusted under normal ambient temperatures, as there might be more or
less remarkable deviations depending on sensor type.
Make sure that measures have been taken to avoid unintended triggering and
transmission of alarms before applying test gas. Activate the alarm bypass in ser-
vice mode at your ExTox Control Unit, deactivate automatically triggering protec-
tion measures or inform the responsible maintenance personnel. The measures cor-
responding to your application have to be determined and the person in charge for
maintenance has to be familiar with all details.

System Check

6.4
The system check additionally comprises the triggering of switching functions;
check of system parameters and of indication and recording facilities.

Calibration and Adjustment

6.5
Calibration and Adjustment are done by means of test gases and a suitable system
for application of test gas. When calibrating the indication of measured values at
application of test gas is determined and compared with the nominal values. In
case the settings are corrected additionally the process is called adjustment.
Calibration or adjustment should only be done, if an alarm is not present. You
should ensure the same environmental conditions during this process as valid for
the measuring process. For example a transmitter used in cold storage houses
should not be adjusted under normal ambient temperatures, as there might be
more or less remarkable deviations depending on sensor type.
Make sure that measures have been taken to avoid unintended triggering and
transmission of alarms before applying test gas. Activate the alarm bypass in ser-
vice mode at your ExTox Control Unit, deactivate automatically triggering protec-
tion measures or inform the responsible maintenance personnel. The measures cor-
responding to your application have to be determined and the person in charge for
maintenance has to be familiar with all details.

Performance of Calibration

6.5.1
The necessary test gases ( DB), the system for application of test gas as well as
the ExTox Calibration Adapter have to be prepared.
It has to be ensured that all used material is compatible with the measured gas and
that substances to contaminate the sensor element are not available. For example,
you should not use tubes containing silicone for transmitters working on the princi-
ple of catalytic combustion. ExTox offers you suitable equipment if requested.
The use of the ExTox Calibration Adapter ensures that the measuring results when
applying test gas correspond to those in normal measuring operation of the trans-
mitter.
The calibration adapter has to be put onto the sensor element as far as it will go.
The adapter should not be canted and it should lock leak-proof with the sensor el-
ement. Connect the hose of your calibration device with the gas inlet of the adapt-
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