R
INSTALLATION & OPERATING DATA
8 CALIBRATION
The gas sensing module will gradually change its response
characteristics, by a small amount, during normal use.
The output signal is standardised so the module can be
quickly changed when necessary.
Ser vice replacement modules can be
supplied by our Product Suppor t
Depar tment.
Alternatively the gas sensing module
may be re-calibrated when required,
using a Trolex TX6520 Gas Test Kit
equipped with both Air and
Test Gas canisters.
8.1
Prepare to Calibrate
Connect the application tube of the gas test kit to the
inlet aperture of the gas sensing module.
8.2
Enter Calibrate Mode
Press BOTH pushbuttons on the gas
sensing module for about 5 seconds.
Then release.
The indicator will be
RED
denoting that the
module is now setup ready for:
When the Gas Sensing Module is
setup into the CALIBRATE MODE it
will instruct the transmitted output
signal of the sensor to be FIXED at
a value of 0.00. This will prevent the
possibility of false alarm signals being activated in the
monitoring equipment during the calibration process.
The display will continue to show the measured value of
gas concentration during the calibration process.
This function is not operational on 4 to 20 mA, 2 wire systems.
Refer to Section
8.3
Calibrate ZERO
OR
Calibrate SPAN
Refer to Section
8.4
FIX
0
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ISSUE N 06/15
