Fluke HPMS - Manual (Page 106)

RPM4/HPMS A70M/A20M-AF OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company Page 96
UNITn
Purpose
Read or set the pressure unit of measure unit and measurement mode.
Command
Query “UNITn unit (, ref”)”
“UNITn unitn (, ref”)”
“UNITn unitg (, ref”)”
“UNITn unita (, ref”)”
“UNITn unitd (, ref”)”
“UNITn?”
Classic “UNITn=unit (, ref”)”
“UNITn=unitn (, ref”)”
“UNITn=unitg (, ref”)”
“UNITn=unita (, ref”)”
“UNITn=unitd (,ref”)”
“UNITn”
Optional Suffix “n”
The active Q-RPT is assumed if no suffix is given.
‘1’ Specify the Hi Q-RPT
‘2’ Specify the Lo Q-RPT
Arguments Unit:
ref: The text corresponding to the pressure unit of measure. A unit mode
character can optionally be added to the end of the units:
‘a’ for absolute measurement mode.
‘g’ for gauge measurement mode.
The optional unit reference temperature only if the unit is “InWa”
Remarks This program message determines what unit of measure and what measurement mode is used to
display pressure values. Refer to Table 7 for a detailed list of the units available and their labels.
If the unit text is not followed by an explicit mode character (‘a’, ‘g’) then “gauge” mode is assumed.
There can be a space between the unit text and the ‘a’ or ‘g’.
If the unit specified is “InWa”, an optional second argument “ref” can be set. The “ref” can be 4, 20,
or 60 corresponding to InWa at 4 °C, 20 °C or 60 °F. If this second argument is not given when the
unit is “InWa”, then the reference temperature is assumed to be 20 °C. This can also be added
directly onto the end of the Unit argument if desired.
The fifth character of the reply is always ‘a’ for absolute mode or ‘g’ for gauge/negative gauge
mode. White spaces precede this character if needed. The temperature reference is added to the
reply only if the unit is “InWa”.
The reply includes the measurement mode character in the fifth position, with an ‘a’ indicating
absolute mode or a ‘g’ indicating gauge.
The “MODE” command can also be used to set the desired measurement mode only.
Example
(enhanced) Cmd sent:
Query reply:
Sent:
Query reply:
Sent:
Query reply: “UNIT? kPaa”
“kPaa”
“UNIT? InWag, 4”
“inWag, 4”
“UNIT? InWaa60”
“inWaa, 60”
Example
(enhanced) Cmd sent:
Query reply: “UNIT psi n”
“psi g”
(‘g’ used to indicate both gauge & neg gauge modes)
Example
(classic) Sent:
Reply:
Sent:
Reply: “UNIT=kPaa”
“kPaa”
“UNIT=InWag, 4”
“inWag, 4”
Errors ERR# 7:
ERR# 6:
ERR# 20:
The unit is invalid.
The ref is invalid.
Absolute measurement mode and altitude units are not allowed with a gauge Q-RPT.
See Also “MMODE”, “MODE”
3.3.2, 3.3.3, 3.5.6, 7.1.1
VER
Purpose
Identify the RPM4, US or SI units, the Q-RPT labels and the software version.
Query “VER?”
Classic “VER”
Remarks
The software version of the RPM4 can be read. This is useful for checking for the presence of the
RPM4 and for reference purposes. It indicates the internal Q-RPT(s) and software version.
Example
(enhanced) Query sent:
Query reply: “VER?”
“DH INSTRUMENTS, INC RPM4 us A350K/BG15K Ver1.00 ”
Example
(classic) Query sent:
Query reply: “VER?”
“DH INSTRUMENTS, INC RPM4 us A350K/BG15K Ver1.00 ”
See Also “ID”, “*IDN?”
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