DH Instruments PPCH, Руководство по эксплуатации и обслуживанию

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PPCH™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 116
PSF
Purpose Set a new target pressure, using a fast fixed rate and aborting pressure control once the
target
is reached.
Command “PSF n ”
Classic “PSF= n ”
Arguments N: The target pressure in the current pressure unit.
Remarks The PPCH sets the given target pressure using a rate of 2 % FS/sec, and stops controlling as
the pressure approaches the given target. The system does not attempt to maintain the target
pressure.
The “PR?”, “PRR?”, “STAT?”, or “SR?” program message queries can be used to monitor the
progress of the generation.
Example
(enhanced) Cmd sent:
Reply: “PSF 1000”
“1000 kPa a (no reply if IEEE-488)
Example
(classic) Sent:
Reply: “PSF=1000”
“1000 kPa a
Errors ERR# 6
ERR# 8
ERR# 12
ERR# 55
The target pressure is out of range.
Active external RPM4 timeout.
Pressure has exceeded maximum limits.
Hardware malfunction, reservoir level low.
See Also “PR”, “PRR”, “STAT”, “SR”, “PSS”, “PS”
3.2.1
PSS
Purpose Set a new target pressure using a slow fixed rate and aborting pressure control once the
target
is reached.
Command “PSS n ”
Classic “PSS= n ”
Arguments N: The target pressure in the current pressure units.
Remarks The PPCH sets the given target pressure using a rate of 0.2% FS/sec, and stops controlling
when the pressure has reached or passed the given target. The system does not attempt to
maintain the target pressure.
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 kPaa”
(no reply if IEEE-488)
Example
(enhanced) Cmd sent:
Reply: “PSS? 1000”
“1000 kPaa”
Example
(classic) Sent:
Reply: “PSS=1000”
“1000 kPaa”
Errors ERR# 6
ERR# 8
ERR# 12
ERR# 55
The target pressure is out of range.
Active external RPM4 timeout.
Pressure has exceeded maximum limits.
Hardware malfunction, reservoir level low
See Also “PR”, “PRR”, “STAT”, “SR”, “PSF”, “PS”
3.2.1
PUMPPR
Purpose Read the pump drive and outlet pressure.
Query “PUMPPR?”
Classic “PUMPPR”
Remarks
The last known measured pump drive pressure and calculated pump outlet pressure is replied
in the current pressure units.
Example
(enhanced) Query sent:
Reply: “PUMPPR?”
“366.7 kPa,76307.5 MPa”
Example
(classic) Query sent:
Reply: “PUMPPR”
“366.7 kPa,76307.5 MPa”
See Also 3.5.7.3.3, 3.2.1
PUMPHOURS
Purpose Read the total accumulated hours that the PPCH pump has been pressurized.
Query “PUMPHOURS?”
Classic “PUMPHOUS”
Remarks
The PPCH drive pump timer keeps track of how long the pump has has been pressurized since being
serviced.
Example
(enhanced) Cmd sent:
Reply: “PUMPHOURS?”
“22”
Example
(classic) Sent:
Reply: “PUMPHOURS”
“22”
See Also 3.5.7.3.4