Parameter Programming - Varian sentorr Instruction Manual

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PARAMETER PROGRAMMING

The set point and ion gauge parameters listed in a column on the front panel display (see Figure 3-1)
can be viewed or programmed by putting the senTorr into the Program mode. To the left of each para-
meter is a single yellow LED.
If the yellow LED is flashing, that parameter is selected to the Program mode and its value is displayed
in the corresponding gauge readout.
If the yellow LED is lit solidly, that menu item is active, meaning that the set point is energized or the
ion gauge parameter has been changed from its default setting.
Enter the Program mode by pressing the "Option Select" key. The first available parameter, beginning
from the top of the column and depending on the senTorr models and options installed, will flash in the
appropriate gauge display. Repeated "Option Select" key presses will advance through the parameters,
returning the unit to the Run mode after the last key press.
When the desired parameter has been selected, the up and down arrow keys can be used to set a
new value to the flashing digit. The "Enter" key will advance the flashing through the digits, saving the
new value after the last digit has been set.
If the yellow LED is left flashing in the Program mode unattended for
more than 5 seconds, the default will automatically return the annuncia-
tor to the Run mode.
A changed value will not be saved unless it has been "Entered" through
all of its digits. The "Option Select" key can be used to "escape" from sav-
ing a changed value prior to "Enter"ing the last digit.
After the value has been saved, the whole setting will flash. Press "Enter" to re-program the value, or
"Option Select" to advance to the next parameter. The senTorr will exit the Program mode if no keys
are pressed for about 8 seconds.
To disable a set point, set its mantissa to "0.0".
IG Setpt (All Models with Set Point option)
The ion gauge set point can be set to energize when the ion gauge pressure drops below the IG Setpt
threshold setting. It will de-energize when the ion gauge pressure goes above the IG Setpt hysteresis
setting (refer to Para. 3-3, Set Point Hysteresis). The IG Setpt pressure will flash in the IG display. Use
the up and down arrow keys and the "Enter" key to set the digit values and advance through the digits.
TC1 Setpt (All models with Set Point option)
The TC1 set point can be set to energize when TC1 reads less than the TC1 Setpt threshold setting.
It will de-energize when the TC1 pressure goes above the TC1 Setpt hysteresis setting (refer to Para.
3-3, Set Point Hysteresis). The TC1 Setpt pressure wll be displayed in the TC1 readout.
Operation
NOTE
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