Plasma Gas Analyzer
70 02001001A_9
3.5 Configuration and operation
3.5.1 Introduction
All configuration, calibration, diagnostic and run menus described in the standard User
Manual also apply to the argon/helium version of the SERVOPRO PLASMA series analyzer.
There is a supplementary "HIDDEN" menu to select the starting count value and the
background operating gas.
3.5.2 HIDDEN menu access
To access the HIDDEN MENU, go to the main menu and enter the secret code by pressing
“1”, “2”, “3”, and “E” consecutively on the keyboard. This brings up the hidden menu see
Figure 50
Figure 50 - OPERATING PARAMETERS MENU
The starting count value is the threshold value where the analyzer switches from starting
mode to normal mode.
If the cell count value (value from the analog to digital converter; this value may be observed
under DIAGNOSTIC MENU) is under the starting count value, a higher power is applied to
the cell by the plasma generator. Once the plasma is started, the cell count will be higher
than the starting count value and the power will come back to normal. If, for any reason, the
cell count value with the normal power applied to the cell is too close or oscillates around the
starting count value, the analyzer will go back and forth between starting and normal mode.
To get rid of such a situation, you should enter a new (lower) threshold value.
To enter a new value, just use the numerical key on the keypad followed by pressing the "E"
key. The value must be between 0 and 1,000,000 counts.
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