Fluke Calibration RPM4, Operation And Maintenance Manual

Page: 100 / 150

RPM4™ OPERATION AND MAINTENANCE MANUAL
Page 90
ATM
Purpose Reads the next measured pressure from RPM4’s on-board barometer (if present).
Query
Classic “ATM?”
“ATM”
Remarks The atmospheric pressure as measured by the RPM4 on-board barometer is returned in
the current pressure units of the active Q-RPT (always absolute). This measurement is
followed by the units text. Not all RPM4s are equipped with an on-board barometer.
Example
(enhanced) Query sent:
Query reply: “ATM?”
“97.12348 kPa a”
Example
(classic) Sent:
Reply: “ATM”
“97.12384 kPa a”
Errors ERR# 23: RPM4 is not equipped with a barometer.
See Also 3.5.7.1
AUTOZERO n
Purpose Read or set the status of the AutoZ function.
Command
Query “AUTOZERO n state ”
“AUTOZERO n ?”
Classic “AUTOZERO n = state ”
“AUTOZERO n ”
Default “AUTOZERO1”
Optional Suffix
“n”
The active Q-RPT is assumed if no suffix is given.
‘1’ Specify the Hi Q-RPT if the Hi and Lo Q-RPTs are NOT OFF
Specify the HL Q-RPT if the Hi and Lo Q-RPTs are OFF
‘2’ Specify the Lo Q-RPT
‘3’ Specify the HL Q-RPT if the HL Q-RPT is active
Arguments ‘state’ : ’0’ Autozero OFF
’1’ Autozero ON
Remarks The RPM4 AutoZ function can be turned ON and OFF. There is a separate AutoZ flag for
the gauge, absolute, and differential measurement modes for each Q-RPT. This
command sets the AutoZ status for the current mode of the specified or the active Q-RPT
only. To set the sate of AutoZ for a measurement mode, you must be in that mode.
Example
(enhanced) Cmd sent:
Query reply: “AUTOZERO 0”
“0”
(No reply if GPIB-488)
Example
(classic) Sent:
Query reply: “AUTOZERO=0”
“AUTOZERO=0”
Errors ERR# 7:
ERR# 10:
The argument was other than ‘0’ or ‘1’.
The suffix is invalid.
See Also “ZOFFSET”, “MMODE”
3.5.1
AUTOZERO n =RUN
Purpose Run the AutoZero routine.
Command
Query “AUTOZERO n RUN (, Pref )”
“AUTOZERO n ? RUN (, Pref )”
Classic “AUTOZERO n = RUN (, Pref )”
Optional Suffix “n”
The active Q-RPT is assumed if no suffix is given.
‘1’ Specify the Hi Q-RPT if the Hi and Lo Q-RPTs are NOT OFF
Specify the HL Q-RPT if the Hi and Lo Q-RPTs are OFF
‘2’ Specify the Lo Q-RPT
‘3’ Specify the HL Q-RPT if the HL Q-RPT is active
Arguments ‘Pref’ : The AutoZ reference pressure in Pa. Optional when the RPM4 is not in
absolute measurement mode, as the reference is usually “0”.
Remarks The RPM4 AutoZ function can be remotely run with this command only if AutoZero is
ON. You should ensure that the pressure is stable for valid determination of Z
offset
. If in
differential mode, the previous 5 measurements of the Q-RPTs are averaged for Z
offset
calculation so you should ensure that the RPM4 has been stable for at least 5
measurement cycles before running a remote AutoZ in differential mode.
Example
(enhanced) Cmd sent:
Query reply: “AUTOZERO RUN”
“OK”
(No reply if GPIB-488)
Example
(enhanced) Cmd sent:
Query reply: “AUTOZERO? RUN, 97283” (abs AutoZero to 97283 Paa)
“OK”
Example
(classic) Sent:
Query reply: “AUTOZERO=RUN”
“OK”
Errors ERR# 6:
ERR# 10:
ERR# 53
An argument was not given for the AutoZ reference in absolute mode.
Invalid suffix
AutoZero is currently OFF.
See Also “ZOFFSET”, “MMODE”, “AUTOZERO”
3.5.1