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RPM4™ OPERATION AND MAINTENANCE MANUAL
© 2004-2007 DH Instruments, a Fluke Company Page 50
To access run AutoZ by COM2 press [AutoZ], <2COM2>. The display is:
1. Real time pressure reading (without head
correction), pressure unit of measure and
measurement mode of the active Q-RPT.
2. Active Q-RPT position designator.
3. Real time reading from the RPMx connected
to RPM4’s COM2 communications port.
96.7755 kPa a Hi
Pstd,0:0.00000
Observe the displayed pressures and verify that they are stable. When ready,
press [ENT] to cause AutoZ to run. RPM4 logs both readings and calculates a
new AutoZ offset value. The display is:
Press [ENT] to activate the new value of
P
offset
or [ESC] to start over.
Old P
offset
: 0.0 Pa
New P
offset
: 3.1 Pa
For RPM4 to communicate with an RPMx connected to its COM2 port, the
RPM4 and the RPMx RS-232 interfaces must be set up properly
(see Section 3.5.2). If, the RPM4 is unable to communicate with an RPMx via
COM2 when running AutoZ by COM2, it times out after 6 seconds and
displays <RPM NOT detected>.
The value of P
offset
is always displayed and entered in Pascal (Pa).
Run AutoZ by Lo RPT
AutoZ by Lo RPT is available only if the active Q-RPT is the Hi Q-RPT and there
is an Axxx Lo Q-RPT. AutoZ by Lo RPT allows the Lo Q-RPT in an RPM4 to serve
as the AutoZ reference (source of P
std,0
) (see Section 3.5.1, PRINCIPLE).
The Lo Q-RPT is read and the new P
offset
is calculated automatically.
To access run AutoZ by Lo RPT press [AutoZ], <3Lo RPT>. The display is:
1. Real time pressure reading (without head
correction), pressure unit of measure and
measurement mode of the active Q-RPT.
2. Active Q-RPT position designator.
3. Real time reading from the Lo Q-RPT.
96.7755 kPa a Hi
Pstd,0:97.7786
Observe the displayed pressures and verify that they are stable. When ready,
press [ENT] to cause AutoZ to run. RPM4 logs both readings and calculates a
new AutoZ offset value. The display is:
Press [ENT] to activate the new value of
P
offset
or [ESC] to start over.
Old P
offset
: 0.0 Pa
New P
offset
: 3.1 Pa
The value of P
offset
is always displayed and entered in Pascal (Pa).