Run Autoz - Fluke MOLBOX RFM Operation And Maintenance Manual

molbox™ RFM™ OPERATION AND MAINTENANCE MANUAL
To edit the current P
Edit the P
Press [ESC] to abandon changes.
3.4.4.4.2
Run AutoZ is the function by which the current RPT reading is compared to a
reference, P
The value of P
possible change in zero over time (see Section 3.4.4.4, PRINCIPLE).
To access run AutoZ, press [TARE], <4AutoZ>, <4run>. The display is:
Selecting <1Entry> allows the value of P
Selecting <2COM> allows the value of P
RPMx connected to molbox RFM's COM2 communications port.
When AutoZ is run, the molbox RFM internal valves are actuated to connect both
molbox RPTs to the Hi port on the molbox RFM rear panel (see Figure 21 in
Section 5.2.4.1). Be sure the Hi port is fully open to atmosphere when running
AutoZ. Note that the molbox RFM quick connectors and molbox to molbloc
pressure lines are self sealing and therefore DO NOT open to atmosphere
unless a quick connector stem is inserted. Use a quick connector stem (DHI P/N
101889, equivalent to Swagelok SS-QM2-S-200) supplied with the molbox RFM
accessories to open the port to atmosphere.
© 1998-2007 DH Instruments, a Fluke Company
values, press [TARE], <4AutoZ>, <3edit>. The display is:
offset
1. Edit field for the value of P
(1, Hi) RPT.
2. Edit field for the value of P
(1, Hi) RPT.
value(s) as desired and press [ENT] to activate the new value(s).
offset
The value of P is always displayed and entered in Pascal (Pa).
offset

Run AutoZ

, at atmospheric pressure to determine a new value of P
std,0
is then used by AutoZ to automatically correct the RPT for
offset
1. Selection of source of P
std,0
to AutoZ.
Allow the molbox RFM to stabilize at atmospheric pressure and ambient
temperature for 10 to 15 minutes before running AutoZ.
If running AutoZ results in a value of P
the span of the RPT that is being AutoZeroed, the RPT and/or the reference
used as the source of Pstd,0 may be out of tolerance or the AutoZ process may
have been faulty. Before activating a new P
the active RPT, check to be sure that both the RPT and the reference were in
good working order, properly vented to stable atmospheric pressure, at the
same height, and reading in the same pressure units when AutoZ was run.
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of the upstream
offset
Poffset:18.7
of the upstream
Poffset:-3.5
offset
AutoZ by:
1Entry 2COM2
reference to which
to be entered from the front panel keypad.
std,0
to be read automatically from a DHI
std,0
that is greater than ± 0.025 % FS of
offset
offset
Pa UP1
Pa DN2
offset
greater than ± 0.025 % FS of
.