DH Instruments PPC4, Operation And Maintenance Manual

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PPC4™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 144
ARANGE
Purpose Read existing AurtoRange range or create a new AutoRange range.
Command
Query “ARANGE Range, unit, mode (,RptLabel) ”
“ARANGE?”
Classic “ARANGE= Range, units, mode (,RptLabel) ”
“ARANGE”
Arguments Range The AutoRange maximum pressure. Cannot be negative.
Unit: The unit of measure of the Range argument.
Mode: The measurement mode of the Range argument:
“A” for absolute
“G” for gauge
“N” for negative gauge
Note
Measured pressure values are returned with “g” to
identify measurement mode for both gauge and negative
gauge measurement modes.
RptLabel:
(optional)
One of the Internal or External RPTs that is available.
“IH”:
Internal, Hi Q-RPT
“IL”: Internal, Lo Q-RPT
“X1H”: External RPM4, Hi Q-RPT
“X1L”: External RPM4, Lo Q-RPT
Remarks The ARANGE command is used to define a PPC4 range by specifying a desired unit of
measure, measurement mode and maximum pressure, and have the PPC4 pick the best
available Q-RPT and make operational adjustments to optimize that range. Available Q-RPTs
may be determined by the use of the “RPT” command to search for external RPM4
devices or use of the [RPT] function key.
The optional “
RptLabel ” argument can be used to specify which Q-RPT you wish to use
for the AutoRange range instead of allowing the PPC4 to pick the best Q-RPT. By using
this option you can override the internal logic that picks the most suitable Q- RPT. This Q-RPT
must have been previously found using the “RPT” command,
[RPT Search] or <RPT>
and must be valid for the maximum pressure and measurement mode specified.
The reply indicates the current range data, including the
RptLabel used for the range.
If a water column unit (inH2O, mH2O, mmH2O) is specified for the pressure unit of
measure, the temperature reference can be given after the unit text. For example,
“inH2O4”, “inH2O20” or “inH2O60” corresponds to inH2O at 4 °C, 20 °C or 60 °F. If no
temperature is specified, a default of 20 °C is assumed. There is no indication of the
temperature reference in the reply.
Example
(enhanced) Cmd sent:
Query reply: “ARANGE?” (read the current range in the current units)
“100.00, psi, A, IH”
Example
(classic) Cmd sent:
Query reply: “ARANGE” (read the current range in the current units)
“100.00, psi, A, IH”
Example
(enhanced) Cmd sent:
Query reply: “ARANGE? 250, inWa4, G (range of 250 inWa @ 4 °C in gauge mode)
“250.000 inWa, G, X2H”
(Hi RPT of 2
nd
external RPM4 used)
Example
(classic) Cmd sent:
Query reply: “ARANGE=250, kPa, G (set a range of 250 kPa in gauge mode)
“250.00 kPa, G, X1L” (Lo RPT of 1
st
external RPM4 used)
Example
(enhanced) Cmd sent:
Query reply: “ARANGE 50, psi, A, X1L (set a range of 50 psi in absolute mode on
Lo RPT of 1
st
RPM4)
“50.000 psi, A, X1L” (No reply if IEEE-488)
Errors ERR# 4:
ERR# 5:
ERR# 6:
ERR# 19:
ERR# 20:
ERR# 29: RPT previously found not detected. Usually occurs when the external
RPM4(s) have been disconnected since the last RPT “search”
RPT previously found not the same as now found. Usually occurs when
the external RPM4(s) connections to the PPC4 have been changed
since the last RPT “search”.
“
Range “ maximum pressure exceeds available RPTs or is negative.
Cannot Range to ‘0’ with absolute units.
Cannot Range to ‘0’ with gauge units.
Correct type of RPT for the selected “
Mode ” is not available.
See Also “RPT”, “RANGE”
3.2.8. 3.2.5, 3.2.6, 3.2.11