Gassing The Sensor; Equipment Required; Calibration Gassing Procedure - Honeywell 705 Operating Instructions Manual

MAN0364.P65 Issue 03, Mar 01
00705M5003

6.1 EQUIPMENT REQUIRED

To test and calibrate the gas detection system the following
items are required:
a.
b.
Note:

6.2 CALIBRATION GASSING PROCEDURE

(1)
(2)
(3)
(4)
(5)

6. GASSING THE SENSOR

A suitable Calibration Gas Test Kit and a bottle of the
appropriate test gas.
Where sensor accessories are not fitted, a Sample
Flow Housing will be required for accurate sensor
calibration.
Purpose built gassing equipment is available on
request from Zellweger Analytics Limited.
Connect a suitable calibration gas test kit to the sensor
gassing nozzle, or to the permanently connected
pipeline where fitted.
Upward pressure on the gassing nozzle of Weather
Protection Housings, forces the nozzle against the
hydrophobic barrier. Do not rotate the nozzle when fitting
the pipeline as this may cause damage.
Open the valve of the calibration gas test kit and set
the flow rate to 1.5 ± 0.1 litres per minute.
Apply the gas to the sensor for a minimum period of 3
minutes.
Set up the Control System as instructed in the Control
System manual.
On completion, shut off the test gas and disconnect
the calibration gas test kit.
CAUTION
21
705 Sensor CO