MKS PDR 2000 - The Commands Used in the PDR 2000; Pressure; Table 7: Serial Output and Displayed Pressure

Description of Parameter Selection and Adjustment Chapter Three: Operation
42
The Commands Used in the PDR 2000:
Pressure
To read the pressure of both gauges:
Send “p” (ASCII value 112); the PDR 2000 sends pressure for gauge 1 and gauge 2 to the terminal. The
output is in the format:
ABCDeE FGHIeJ
Where:
• ABCD is the multiplier and E is the exponent for CDG #1.
• FGHI is the multiplier and J is the exponent for CDG #2.
Some examples follow on the next page in Table 7.
Serial Output and Displayed Pressure
Displayed Pressure Serial Output
OFF
Off
LO
Low
0.000 mTorr 0.000e-3
0.800mTorr 0.800e-3
2.800 mTorr 2.800e-3
-1.600 mTorr -1.600e-3
57.10 mTorr 57.10e-3
2.340 Torr 2.340e+0
105.0 Torr 105.0e+0
4115 Torr 4115e+0
9999 Torr 9999e+0
Table 7: Serial Output and Displayed Pressure
Since both gauges are maintained in an active state, pressure data taken over the serial port are valid for
both gauges at the same time, regardless of which gauge is shown on the digital display.