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C-Link Protocol Commands
Measurements
B-12
Model 42i Trace Level Instruction Manual
pmt voltage
This command reports the PMT voltage. The example below reports that
the current PMT voltage is -750 volts.
Send:
pmt voltage
Receive:
pmt voltage -750
pres
This command 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 300 mmHg is used
as default pressure even though the actual pressure is 306.3 mmHg. The
example below shows that the actual reaction chamber pressure is 306.3
mmHg.
Send:
pres
Receive:
pres 753.4 mm Hg, actual 306.6
react temp
This command reports the current reaction chamber temperature. The
example below reports that the current reaction temperature is 49.0 °C.
Send:
react temp
Receive:
react temp 49.0 deg C
flags
This reports 8 hexadecimal digits (or flags) that represent the status of the
ozonator, PMT, pressure and temperature compensation status, gas units,
gas mode, and alarms. To decode the flags, each hexadecimal digit is
converted to binary as shown in the
define the status of each parameter. In the example below, the instrument is
reporting that the ozonator and PMT are both on, and that the instrument
is in the span gas mode.
Send:
flags
Receive:
flags 80028000
Figure
B–1. It is the binary digits that
Thermo Fisher Scientific
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Troubleshooting
