DH Instruments PPCK PLUS, Руководство по эксплуатации и обслуживанию

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PPCK+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc .
Page 92
PSS
Purpose Set a new target pressure and use just the slow speed to generate the pressure.
Command “PSS n ”
Classic “PSS= n ”
Arguments n: The target pressure in the current pressure units.
Remarks The PPCK+ will set the given target pressure using just the slow speed, and will stop
generating when the pressure has reached or passed the given target. The system
will not attempt to hold the pressure. Control stops after the pressure is set.
The “PR?”, “PRR?”, “STAT?”, or “SR?” program message can be used to monitor the
progress of the generation.
Example
(enhanced) Cmd sent:
Reply: “PSS 1000”
“1000.000 kPaa (no reply if IEEE-488)
Example
(classic) Sent:
Reply: “PSS=1000”
“1000.000 kPaa
Errors ERR# 6: The target pressure is out of range.
See Also 3.1.2.2, “PR”, “PRR”, “STAT”, “SR”, “PSF”, “RATES”
QPRR
Purpose Read the last RPT pressure, rate, and ATM pressure.
Query “QPRR?”
Classic “QPRR”
Remarks The last measured Ready condition, pressure rate of pressure change, and ambient
pressure for the active RPT (always Hi RPT in PPCK+) and range is returned in the
current pressure units. This program message is useful when a rapid response of
measured pressure is needed. Each data field is separated by a comma, and is
returned in the following order:
Ready/Not Ready , pressure UNITS, rate UNITS/s,
atm UNITS.
Here are the field descriptions:
Ready/Not
Ready
:
‘R’ if the current pressure Ready criteria has been met,
‘NR’ if the criteria has not been met (see the “SR” program message).
pressure The measured pressure for the selected RPT and range in the
current pressure units. This is followed by the current pressure units.
rate The measured rate for the selected RPT and range in the current
pressure units per second. This is followed by the current
pressure units.
atm The ambient pressure measured by the PPCK+ internal barometer in
the current pressure units (but always absolute). This is followed by
the current pressure units.
Example
(enhanced) Query sent:
Query reply: “QPRR?”
“R,2306.265 kPaa,0.011 kPa/s,97.000 kPaa”
Example
(classic) Query sent:
Reply: “QPRR”
“R,2306.265 kPaa,0.011 kPa/s,97.000 kPaa”
See Also “PR”, “PRR”, “SR”, “ATM”, “RATE”