3. OPERATION

When the run AutoZ selection is made, if a HEAD correction is currently active (see Section 3.3.7) the head correction is momentarily disabled while running AutoZ to avoid “zeroing out” the head value.

The value of Poffset is always displayed and entered in Pascal (Pa).

Run AutoZ by Entry

AutoZ by entry allows the value of Pstd,0 (see Section 3.5.1,  PRINCIPLE) to be entered directly from the RPM4 front panel. This provides a simple way of AutoZeroing relative to an independent reference device such as a house barometer that does not interface directly with RPM4.

To access run AutoZ by entry press [AutoZ], <1entry>. 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.Entry field for the value of Pstd,0. in the current pressure unit of measure.

96.7755 kPa a

Hi

Pstd,0:0.00000

 

Enter the value of the AutoZ reference (Pstd,0) in the same unit of measure as the top line display and press [ENT]. RPM4 logs the reading and calculates a new AutoZ offset value. The next display is:

Press [ENT] to activate the new value of Poffset or [ESC] to start over with entry of a new AutoZ reference (Pstd,0) value.

Old Poffset: 0.0 Pa

New Poffset: 8.3 Pa

The value of Poffset is always in Pascal (Pa). The value of Pstd,0 is entered in the current pressure unit of measure.

Run AutoZ by COM2

AutoZ by COM2 allows the value of Pstd,0 (see Section 3.5.1  Principle) to be read automatically from a DHI RPMx connected to the RPM4 COM2 communications port. The RPMx is read and the new Poffset is calculated automatically.

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© 2004-2007 DH Instruments, a Fluke Company

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Fluke RPM4 manual Run AutoZ by Entry, KPa a Pstd,00.00000, Old Poffset 0.0 Pa New Poffset 8.3 Pa, Run AutoZ by COM2