22May2002
Page
13
3.
Position lower portion of housing (cylinder) around sensor. Push
upper edge of cylinder over upper housing. Tighten four set screws
to secure cylinder.
VIII. SENSOR CALIBRATION:
NOTE:
A routine program of calibration should be employed to ensure proper
operation/performance of the sensor and system. Although the sensors are normally
quite stable, it is generally recommended that calibration be performed monthly in
the interest of safety.
Sensor calibration is performed at the smarter transmitter using a gas sample of
known
concentration
. To calibrate the sensor, follow the steps outlined below.
NOTE:
The sensors are
factory calibrated
with gas prior to delivery. Field calibrations
must be performed with an appropriated gas sample of
known concentration
.
