Appendix B RS-232 Commands
B-12
pres
This reports the current reaction chamber pressure. The first pressure reading is the
pressure reading being used in instrument calculations. The second pressure is the actual
pressure reading being measured. If pressure compensation is on, then both pressure
readings are the same. If pressure compensation is off, a pressure of 750 mm Hg is used
as the default pressure even though the actual pressure is 753.4 mm Hg. The example
below shows that actual reaction chamber pressure is 753.4 mm Hg.
Send: "pres"
Receive: "pres 750.0 mm Hg, actual 753.4"
pres comp
This reports whether pressure compensation is on or off. The example below shows that
pressure compensation is on.
Send: "pres comp"
Receive: "pres comp on"
set pres comp on
set pres comp off
These commands turn the pressure compensation on and off. The example below turns
pressure compensation off.
Send: "set pres comp off"
Receive: "set pres comp off ok"
time
This reports the current time (military time). The example below reports that the internal
time is 2:15:30 pm.
Send: "time"
Receive: "time 14:15:30"
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