Fluke RPM4-AD, Operation And Maintenance Manual

Page: 108 / 152

RPM4-AD™ OPERATION AND MAINTENANCE MANUAL
© 2005-2007 DH Instruments, a Fluke Company Page 98
RATE
n
Purpose Read the next available pressure rate of change.
Query “RATE n ?”
Classic “RATE n ”
Optional Suffix “n”
The active Q-RPT is assumed if no suffix is given.
‘1’ Specify the Hi Q-RPT if the HL RPT is not active
Specify the HL Q-RPT if the HL Q-RPT is active
‘2’ Specify the Lo Q-RPT
‘3’ Specify the HL Q-RPT if the HL Q-RPT is active
Remarks The next available pressure rate of change in the current pressure unit per second is returned.
Though the RPM4-AD can set locally to display rate per minute, the response to the “RATE”
command is always rate per second.
After receiving this program message, the RPM4-AD replies back with the data once a new
pressure measurement cycle is complete. This can take up to the current read rate period (1.2
seconds
by default).
Example
(enhanced) Query sent:
Query reply: “RATE?”
“0.01 kPa/s”
Example
(classic) Sent:
Reply: “RATE2”
“0.03 kPa/s”
See Also “PRR”, “QPRR”.”READRATE”
3.3.6.2
READRATE
n
Purpose Read or set the specified or active Q-RPT read rate or auto read rate mode.
Command
Query “READRATE n period ”
“READRATE n ?”
Classic “READRATE n = period ”
“READRATE n ”
Optional Suffix “n”
The active Q-RPT is assumed if no suffix is given.
‘1’ Specify the Hi Q-RPT if the HL RPT is not active
Specify the HL Q-RPT if the HL Q-RPT is active
‘2’ Specify the Lo Q-RPT if the HL Q-RPT is not active and the
measurement mode is not differential
‘3’ Specify the HL Q-RPT if the HL Q-RPT is active
Arguments “period ": Period to integrate the measurement over (ms). Can be from 200 ms to 20000
ms. Set to ‘0’ to enable automatic read rate.
Remarks The RPM4-AD can have the speed in which it integrates each measurement (“read rate”)
automatically adjusted based on the rate, or it can manually set to a fixed period. Increasing the read
rate increases the reply time for pressure and rate queries. In differential mode and when using the HL
Q-RPT, the Lo Q-RPT read rate is always set to the same read rate as the Hi.
Example
(enhanced) Cmd sent:
Query reply: “READRATE 1000”
“1000”
(No reply if GPIB-488)
Example
(enhanced) Cmd sent:
Query reply: “READRATE? 1000”
“1000”
Example
(classic) Sent:
Reply: “READRATE=1000”
“1000”
Errors ERR# 6:
ERR#10:
The “ period ” argument is out of range.
The suffix ‘ n ’ is invalid
See Also “PR”, “PRR”, “SR”
3.5.7.2