™/S, MOLBLOC TERMINAL OPERATION AND MAINTENANCE MANUAL
© 1995 - 2010 Fluke Corporation, DH Instruments Division
Page 132
SR
Purpose
Read the next available ready status.
Syntax
“SR”
Remarks
The current
Ready/Not Ready
status can be read directly using this command. If
the reply is "NR" then the flow is
Not Ready
within the limits set by the stability
settings, molbloc calibration flow or pressure limits. If the reply is "R" then the flow
is
Ready
within the limits. The status is replied when the next flow measurement is
finished.
The third character indicates optional additional molbox status information:
"r"
molbloc flow is over the maximum Reynolds number of 1 200 allowed for
a valid measurement.
“b”
is busy with a
tare
, leak check or purge cycle which does not
allow normal operation.
“a”
is currently executing an averaging cycle.
“P”
molbloc-S BPR is too high or molbloc pressure exceeds molbloc
calibration pressure limits by 10kPa or more (always causes a
Not
Ready
condition).
“F”
Measured flow exceeds molbloc calibration flow limit by 5% or more
(always causes a
Not Ready
condition).
Example
Command:
Reply:
Reply:
Reply:
Reply:
“SR ”
“R ”
(Flow measurement is ready)
“NR ” (Flow measurement is not ready)
“R a” (average cycle is executing)
“R b” (tare, leak check or purge cycle is executing)
“NRP” (BPR is too high for a valid measurement)
See Also
3.1.3, “FA”, “FR”, “READYCK”, “SS”, “TARESET”, “PURGE”, “LEAKCK”, “ALLR”
SS(%)
Purpose
Read or set the flow stability required for a
Ready
condition to occur (flow unit/s).
Syntax
“SS=stab”
“SS”
“SS%=stab%”
“SS%”
Defaults
“SS=0.1 sccm”
Arguments
stab:
stab%:
The flow stability in flow unit/sec.
The flow stability in % FS of the active molbloc.
Remarks
The stability setting determines whether the flow is
ready
or
not ready
. Stability is
set in terms of flow or % FS. It is always stored in terms of flow, so the % FS value
will change if the molbloc range changes. If the rate of change of flow is greater
than the current setting, then the status is
Not Ready
.
Example
Command:
Reply:
Command:
Reply:
“SS=.2”
“0.20 sccm”
“SS%=.1”
“0.1000 %”
Errors
ERR# 6:
The argument is invalid.
See Also
3.1.3, 3.5.2, “READYCK”, “SR”
STDRES(=)
Purpose
Read or set the PRT measurement system auto-calibration reference resistor
values .
Syntax
“STDRES=R100, R110”
“STDRES”
Defaults
“STDRES = 100.0000, 110.0000”
Arguments
R100:
R110:
The actual value of the 100
Ω
reference resistor.
The actual value of the 110
Ω
reference resistor.
Remarks
These values are stored in the molbox’s factory data area, and should not be
routinely changed due to a limitation of the number of changes allowed (100,000
changes) before the factory data area is subject to failure. Use the channel
dependent “TCAL” command for adjusting the temperature calibration.
Example
Sent:
Reply:
“STDRES=100.002, 109.998”
“ 100.0020 Ohms, 109.9980 Ohms”
See Also
5.4, “TCAL”
