4. REMOTE OPERATION
Page 145
© 1998-2008 DH Instruments, a Fluke Company
DIFLOAD
Purpose
Executes the mass load determined by the DIFSETUP command.
Syntax “DIFLOAD”
Remarks
This command must be preceded by the DIFSETUP command. The DIFSETUP
command sets up the PG7601 and determines the proper mass load for offset
determination.
The DIFLOAD command executes the mass load determined by the DIFSETUP
command and places the PG7601 into the offset determination mode. When in this
mode, use the DIFOFFSET command to query the PG for the calculated differential
offset. The DIFOFFSET command is also used to save the offset as the new differential
mode RPM offset value, and to exit the offset determination mode. The ABORT
command can also be used to exit the offset determination mode.
The reply is the same nominal mass values returned by the DIFSETUP command that is
expected to be loaded.
Example Typical
command:
Typical reply:
“”DIFLOAD”
“9.7 kg, 28.05 g”
Error
See the “DIFSETUP” and “DIFOFFSET” commands.
ERR
#1
ERR #23
ERR #35
Argument is invalid.
Vacuum reference not supported by this PG7000.
The “DIFSETUP” was not used prior to this command.
See Also
3.9.4.1, DIFLOAD, DIFSETUP
DIFOFFSET (=)
Purpose
Set or read the differential offset value.
Syntax “DIFOFFSET=offset,
pressure”
“DIFOFFSET”
Default Offset:
Pressure:
0 Pa
101325.0 Paa
Argument Offset:
“NEW”
Saves the current calculation of RPM offset if PG7601 is
currently in the offset determination mode, else set the
differential offset value in Pa.
Pressure:
The PG7601 defined pressure when the previously determined
differential offset was saved or if
Offset
is “NEW”, this argument
is ignored and should not be used.
Remarks
The DIFOFFSET commands have two types of operation.
If PG7601 is in the offset determination mode, the calculated offset of the external
measurement device from the PG7601 defined pressure is returned along with the
current PG7601 pressure. If the “NEW” arguments is given with this command, the
calculated offset and PG7601 pressure are saved as the new RPM offset and pressure,
and PG7601 exits the offset determination mode returning to normal operation, with
differential measurement mode enabled.
If the PG7601 is not in the offset determination mode, this command just reads back the
RPM offset and pressure as determined previously, or can be used set them to another
value.
Example Typical
command:
Typical reply:
“DIFOFFSET=7.1,97.100”
“7.10 Pa, 97.10 000 Paa”
If PG7601 is in the offset determination mode:
Typical
command:
Typical reply:
“DIFOFFSET=NEW”
“4.13 Pa, 96.14321 Paa”
Error
See the “DIFSETUP” and “DIFLOAD” commands.
ERR
#1
ERR #2
ERR #35
The Offset field is invalid or missing.
The Pressure field is invalid or missing.
Offset was “NEW” but the PG is not in the offset determination
mode.
See Also
3.9.4.1, DIFLOAD, DIFSETUP