Fluke MOLBOX1 PLUS - V 6.00 - 5.2.2 Equipment Required for RPT Calibration; 5.2.3 Set-Up and Preparation for Calibration

4. REMOTE OPERATION
Page 133 © 1995 - 2010 Fluke Corporation, DH Instruments Division
TARE
Purpose
Read the current tare conditions and the current tare. Not available on a
molbox1+S.
Syntax
“TARE”
Remarks
The user should set the molbox1+ valves to the tare condition (see “TARESETUP”)
and check the tare conditions using this command before taring the internal
transducers (see “TARESET”).
The returned data will allow the user to determine if the current conditions will allow
a valid tare. The reply contains three fields which are separated by commas.
The first field starts with an "R" if the system is ready to tare or else an "NR". The "R"
must be present to tare the transducers. The system is ready to tare only if the
current difference in pressure [Pa] between the up and down stream RPTs without
tare is below 3,000 Pa. The actual pressure rate of change in Pa/sec follows this text.
The second field displays the current difference in pressure [Pa] between the up and
down stream RPTs without tare. The third field shows the last tare value. All returned
values are in Pascal [Pa]. You cannot be in A+B or A/B modes when taring.
The normal order of remote commands for a tare operation:
“TARESETUP=UP” or “TARESETUP=DN” configures the molbox1+ for a tare.
“TARE” queries the molbox1+ for current conditions until it is ready for tare.
“TARESET” tares the molbox1+ when the “TARE” query has shown it is ready.
“TARESETUP=OFF” returns the molbox1+ to normal measurement mode.
Example
Command:
Reply:
“TARE”
“R 0 Pa/s, 115.2 Pa, 108.1 Pa”
Errors ERR# 6:
ERR# 52:
An argument is invalid.
Cannot tare in A+B or A/B mode.
See Also
3.4.4.1, “TARESET”, “TARESETUP”
TARESETUP(=)
Purpose
To prepare the molbox1+ to be tared and to return the unit to normal operation
after a tare has been completed. Not available on a molbox1+S.
Syntax
“TARESETUP=mode
“TARESETUP”
Defaults
“TARESETUP=OFF”
Arguments mode:
“OFF”. Allows normal operation of the molbox1+.
“UP”. Connects both of the absolute RPTs to the upstream
pressure.
“DN”. Connects both of the absolute RPTs to the downstream
pressure.
Remarks
Before the molbox1+ can be tared, the “TARESETUP” command must be used to
configure the internal RPT connections properly. After the tare operation is complete,
the “TARESETUP” command must again be used to restore the molbox1+ to
normal operation. The “ABORT” command can also return operation to normal.
The normal order of remote commands for a tare operation:
“TARESETUP=UP” or “TARESETUP=DN” configures the molbox1+ for a tare.
“TARE” queries the molbox1+ for current conditions until it is ready for tare.
“TARESET” tares the molbox1+ when the “TARE” query has shown it is ready.
“TARESETUP=OFF” returns the molbox1+ to normal measurement mode.
Example Command:
Reply:
“TARESETUP=UP”
“UP”
Errors
ERR# 6:
ERR# 52:
An argument is invalid.
Cannot tare in A+B or A/B mode.
See Also
3.4.4.1, “TARE”, “TARESET”; “ABORT”