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molbox™ RFM™ OPERATION AND MAINTENANCE MANUAL
FR
Purpose
Syntax
Remarks
Example
Errors
See Also
FRA
Purpose
Syntax
Remarks
Example
Errors
See Also
© 1998-2007 DH Instruments, a Fluke Company
Read the next measurement of flow through the molbloc as
calculated by the molbox RFM.
"FR"
The next available flow value is read in the current flow units.
This can take up to 1 second, since the molbox RFM waits for
the next flow measurement before replying.
contains ready information.
The first 3 characters are reserved for the ReadyNot Ready
status.
The Ready/Not Ready status is covered in the "SR"
command.
The flow measurement number starts at the fifth
character, and is followed by the flow units.
Command:
"FR"
Reply:
"R 0.00001 sccm"
ERR# 27:
One of the RPTs (transducer) is not functioning.
3.1.2.4, "SR", "READYCK"
Read the results of a completed flow averaging cycle.
"FRA"
This command is used to check on the status of or collect the
results of an averaging cycle that was started earlier using the
"FA=" command. During the averaging cycle, this command will
reply "BUSY" until the averaging cycle is complete. Then the
reply will be the result of the averaging cycle. If the cycle is
aborted before it is complete (see "FA="), then the data will be
lost.
The data that is returned from the command consists of multiple
numeric fields delimited by commas. The flow numbers are in
the current flow unit of measure. The actual data fields returned
are as follows:
An "H" will appear as the first character of the reply string. An
"S" will appear as the second character of the string if the flow
stability stayed within the stability setting during the sequence.
From the fourth position on, the numeric data fields are:
Average flow over the averaging period.
Standard deviation of flow over the averaging period.
The minimum flow reached during the period.
The maximum flow reached during the period.
"NA" always.
"NA" always.
Command:
"FRA"
Reply:
"HS 0.00002 sccm,0.00000,0.00002,0.00002,NA,
NA"
Reply:
"BUSY" if still averaging.
ERR# 15:
The "FR" command was not sent previous to
this command.
3.2.6.2, "FR", "SR", "FA"
Page 110
The reply also
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