Servomex SERVOPRO Plasma, Operator'S Manual

Page: 65 / 82

Plasma Gas Analyzer
63 02001001A_9
Enter a realistic value based on your system configuration, typically around 5 minutes. You
should make sure that this value is big enough to allow the sample gas to purge the span gas in
the system.
When the proper timing parameters are entered, automatic calibration can be turned on from
the calibration selection mode menu Figure 42
Toggle the calibrat
ion mode until “ AUTOMATIC”
is selected by pressing F1 in the calibration
selection mode menu. The calibration timer “ TIME BETWEEN CALIBRATIONS”
begins to
count down from the moment you put the analyzer in automatic calibration mode. You may track
the automatic calibration process and monitor both timers
“TIME BETWEEN CALIBRATIONS”
and
“TIME ON CAL. GAS”
from the diagnostic menu. The value displayed next to
“ELAPSED TIME SINCE LAST CAL.”
is the number of hours since the analyzer was put in
automatic calibration mode. The value displayed next to
“MINUTES ON CAL. GAS”
is the
number of minutes the analyzer has spent on calibration gas (zero or span) since the zero or
span gas was selected. “0.0” is displayed if the analyzer is not currently performing a
calibration.
Furthermore, in the run menu, the gas currently selected is displayed next to
“Gas”.
Note that
during an automatic calibration sequence, the status contact remains OPEN.
When the analyzer is in the RUN menu during an automatic calibration, the word
“AUTOCALIB”
will be displayed instead of the measure in PPM.
NOTE: In order to get accurate readings when using auto-calibration mode, the user must enter
proper timing values in accordance with the sampling system. Longer purging time are better
than shorter ones.
NOTE: Only one alarm can be used with the auto-calibration option.