Ametek Thermox WDG Insitu User Manual page 107

Calibration Gas Time
Inadequate

NOTE
If you are having problems running an auto calibration, you
may not have allowed the calibration gases enough time to flow
through the sensor and stabilize. To correct this problem, select
Inject Cal Gas from the Calibrate key menu.
Turn on each calibration gas and determine how long it takes
for each gas to stabilize on the control unit display. Then add a
one minute buffer to each of these times. Also make sure the
cylinder regulators are set to the correct pressure. See the Flow
Section of the System Interconnect Drawing for the system flow
and pressure requirements . This drawing is included with your
Installation package.
Select Cal Gas Duration from the Calibrate/Set Cal Timers
menu to set calibration gas times.
If performing a manual calibration, ensure that you are waiting for the
reading to stabilize on the display before switching to the next calibra-
tion gas. You should wait a minimum of two minutes.
Maintenance and Troubleshooting | 6-9