MKS Granville-Phillips 358 series, Instruction Manual, Page: 86 / 122

Chapter 5
86
Series 358 Micro-Ion Controller Instruction Manual - 358013 - Rev. B
For example, if the setpoint is programmed to 6.6 x 10
–6
Torr the relay will
activate at 6.5 x 10
–6
Torr (on falling pressure) and will deactivate when the
pressure rises to 6.6 x 10
–6
+ 0.7 x 10
–6
+ 0.1 x 10
–6
or 7.4 x 10
–6
Torr.
Since the process control and computer interface modules derive their
pressure data directly from the display bus, they will be unable to update
their pressure data while setpoints are being displayed. They will not
mistakenly interpret setpoint data as pressure data, but will simply retain the
last displayed pressure data until the SET key is released.
Manual Override
The 3-position switches on the front of the process control module allow
override of the programmed setpoints at any time. When moved to the right,
the relay is activated. When moved to the left, the relay is deactivated.
When left in the center position, the relay is controlled automatically.
Figure 5-16 Process Control Module Front Panel
To Display a Setpoint
1. Be sure the “CAL” switch of the electrometer module is in its OFF
position, or the calibration data in display line 1 will conflict with the
display of setpoints 1 and 2.
2. Set selector switch
1
to the number of the channel you wish to display.
3. Press the setpoint display/set button (either the Up or Down button)
and release. The setpoint will appear for 2 seconds in the
corresponding display.
Selector
Switch
Up Set
Button
Down Set
Button
Setpoint Manual Override
Switches