Fluke RPM4-AD, Руководство по эксплуатации и обслуживанию

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RPM4-AD™ OPERATION AND MAINTENANCE MANUAL
© 2005-2007 DH Instruments, a Fluke Company Page 48
Before running AutoZ in gauge mode, ensure that the pressure applied to
the Q-RPT is truly zero gauge (atmospheric pressure). If running AutoZ in
gauge mode results in a zero offset that RPM4-AD considers unusually
large, <Confirm 0 gauge P!> is displayed when AutoZ is pressed. Check that
zero gauge pressure is applied to the TEST port(s) and press ENTER to
continue or ESCAPE to abort. To be sure the Q-RPTs are really open to zero
gauge pressure, SDS may be closed to shut the Q-RPTs off from the
TEST
ports and open vent them to atmosphere.
Allow the RPM4-AD to stabilize at atmospheric pressure and ambient
temperature for 1 to 2 minutes before running AutoZ in gauge mode.
3.3.9.2 [AUTOZ] IN ABSOLUTE MODE
 PURPOSE
To “rezero” the active Q-RPT in absolute measurement mode.
See Section 3.5.1,

Principle for a full explanation of the AutoZ function.
 OPERATION
For the AutoZ function key to run AutoZ, AutoZ must be turned ON for the
active Q-RPT and measurement mode. AutoZ ON is indicated by <z> to the
left of the range designator on the first line of the MAIN RUN screen. AutoZ
ON and OFF is set using [SPECIAL], <1AutoZ> (see Section 3.5.1). If AutoZ
is OFF for the active range, and measurement mode, <AutoZ is off…> is
displayed when [AutoZ] is pressed.
Running AutoZ in or parallel mode (see Section 3.2.5) autozeros both the Hi
and Lo Q-RPTs simultaneously.
AutoZ cannot be run when the active unit of measure is an altitude unit.
To run AutoZ in absolute measurement mode, set absolute measurement mode
(see Section 3.3.3) and press
[AutoZ] from the MAIN RUN screen. The display is:
1. Active Q-RPT designator.
2. Current measurement mode (absolute).
3. Selection of source of P
std,0
reference to which
to AutoZ.
AutoZ Hi abs by:
1Entry 2COM2 3Lo RPT
Selecting <1Entry> allows the value of P
std,0
to be entered from the front panel keypad.
Selecting <2COM2> allows the value of P
std,0
to be read automatically from another
DHI RPMx connected to RPM4’s COM2 communications port.