MKS PDR 2000 - Reset of Stored (Default) Values; Set Point Operation; Reading Pressure

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Note
HEATED CDGs
When using heated or temperature-controlled CDGs, you should wait four
hours before adjusting the PDR 2000 or the CDG. This will allow the
CDG to come to its regulated temperature. When you are confident the
CDG is at a stable temperature, adjust the zero adjustment on the CDG
until the PDR 2000 display shows a value close to zero.
Reset of Stored (Default) Values
This allows you to recover the factory (default) settings for all stored values and resets the
SET POINTS to
off. For a system that is far out of calibration, the factory settings provide a good starting point for re-
calibrating or adjusting the gauge controller.
To recover the factory settings:
1. Unplug the PDR 2000 from its power source.
2. Press and hold the
RAISE and LOWER buttons at the same time.
3. Plug in the power cord, while holding the depressed
RAISE and LOWER buttons.
You will hear a few short ‘chirps’ from the loudspeaker confirming the factory settings have been
entered. The digital display will show RST to confirm the reset has been entered.
Set Point Operation
When pressure values have been entered for a set point (1 or 2) and assigned to a gauge (1 or 2), the set
point relay operates as follows:
• As the pressure on the assigned gauge falls through the chosen “Set Point N Low” pressure, the
relay actuates, either opening (if the Normally Closed pin has been used on the Auxiliary I/O
connector) or closing (if the Normally Open pin has been used on the Auxiliary I/O connector).
• Likewise, as the pressure on the assigned gauge rises through the chosen “Set Point N High”
pressure, the relay de-actuates, either closing (if the Normally Closed pin has been used on the
Auxiliary I/O connector) or opening (if the Normally Open pin has been used on the Auxiliary I/O
connector).
•
Reading Pressure
Pressure display and ranging are automatic in the PDR 2000. Most readings will take place between zero
pressure and the full scale of the PDR 2000. Table 5 that follows, will help explain the operation.
PDR 2000 Ranges: Sensor, High, Low, Set Points
Sensor
Range
Full-Scale
PDR 2000
Lowest Scale
PDR 2000
Highest
Scale
Highest
Resolution
Lowest
Recommended
Reliable Value
Lowest Set
Point
Highest
Set Point
1000 torr XX.X torr XXX torr 0.1 torr 1 torr 2 torr 999 torr