DH Instruments PPCH-G, Руководство по эксплуатации и обслуживанию

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PPCH-G™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 104
PCAL
n
(PCAL:
XX
)
Purpose Read or set the Q-RPT or utility sensor calibration information for the “IH” (internal high) and
“IL” (internal low) RPTs.
Command
Query “PCAL n adder, mult, CalDate, (GaOnly) ”
“PCAL n ?”
Classic “PCAL n = adder, mult, CalDate, (GaOnly) ”
“PCAL n
Defaults “PCAL n = 0.0, 1.0, 19800101, 0”
“n” The active RPT is assumed if no suffix is given. The “Hi” RPT is assumed if the HL
RPT is active and no suffix is given.
‘1’ Specify the Hi RPT Optional Suffix
‘2’ Specify the Lo RPT
Arguments Adder: The RPT calibration adder (PA). In Pascal.
Mult: The RPT calibration multiplier (PM) from 0.1 to 100.
CalDate: The date of the calibration in the format “YYYYMMDD” by default. Any other
format up to 8 characters long will also be accepted, and the replied format is
in the previously entered format.
GaOnly Optional “Gauge only” flag. Indicates that the an Axxx Q-RPT is set to
operate in gauge measurement mode only. This field does not apply for
utility sensors.
‘0’ Absolute and gauge modes are available.
‘1’ Gauge mode only.
Remarks The user defined pressure calibration information for the specified RPT (Hi or Lo pressure)
can be accessed with this program message. Using this program message overwrites the
current calibration coefficients, so caution must be used. If the “
GaMode ” flag is set, then the
RPT will only be allowed to operate in gauge mode. Changes made using this program
message take effect immediately.
The calibration information of
DHI
RPM4s connected to PPCH-G must be adjusted directly on
the RPM4. The information cannot be adjusted through the PPCH-G.
Example
(enhanced) Cmd sent:
Reply: “PCAL1 2.1, 1.000021, 20011201, 0” (“Hi” RPT calibration)
“ 2.10 Pa, 1.000021, 20011201, 0” (No reply if GPIB-488)
Example
(enhanced) Cmd sent:
Reply: “PCAL1? 2.1, 1.000021, 20011201, 0”
“ 2.10 Pa, 1.000021, 20011201, 0”
Example
(classic) Sent:
Reply: “PCAL2=2.1, 1.000021, 20011201, 1” (“Lo” RPT calibration)
“ 2.10 Pa, 1.000021, 20011201, 1”
Errors ERR# 2
ERR# 6:
The CalDate exceeds 8 digits
One of the numeric arguments are out of range.
See Also 5.2
PR
Purpose Read the next available pressure.
Query “PR?”
Classic “PR”
Remarks
The next available pressure value for the active Q-RPT or utility sensor is read in the current
pressure units. The data returned also contains
Ready/Not Ready information, and the
pressure unit of measure and measurement mode.
The reply field is always 20 characters long. The first 3 characters of the reply are reserved
for the ready status (R or NR). The ready status is described in the “SR” program message.
The pressure value and pressure unit of measure are right justified in this field.
After receiving this program message, the PPCH-G replies back with the data after a new
pressure measurement cycle is complete. This can take up to 1.5 seconds.
Example
(enhanced) Query sent:
Reply: “PR?”
“R 19.367 MPa a”
Example
(classic) Query sent:
Reply: “PR”
“R 19.367 MPa a”
See Also “PRR”, “QPRR”, “SR”
3.1.1, 3.2.2