DH Instruments PPCK PLUS, Operation And Maintenance Manual

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PPCK+™ Operation and Maintenance Manual
Page 53
©2001 DH Instruments, Inc .
Run Autoz By Entry (Absolute Mode Only)
AutoZ by entry allows the value of ZSTD (see Section 3.4.1, PRINCIPLE, How AutoZ
Works) to be entered manually. This provides a simple way of autozeroing relative to
an independent reference device such as a house barometer that does not interface
directly with PPCK+.
To access run AutoZ by entry press [SPECIAL] and select <1AutoZ> ,
<4run> , <1Entry> . The display is:
1. Pressure reading, units and mode of the active
RPT range.
2. Active range indicator.
3. Entry field for the value of ZSTD.
Enter the value of ZSTD in the current units.
The next display is:
The new ZOFFSET is the ZOFFSET calculated from this execution of run AutoZ.
Press [ENTER] to activate the new ZOFFSET for the current range absolute
measurement mode and return to the main run screen.
Press [ESCAPE] to maintain the old ZOFFSET and return to the main run screen.
The value of ZOFFSET is always displayed and entered in Pascal (Pa).
The value of ZSTD is entered in the current pressure units.
Run Autoz By Com2 (Absolute Mode Only)
AutoZ by COM2 allows the value of ZSTD (see Section 3.4.1, PRINCIPLE, How
AutoZ Works) to be read automatically from a
DHI RPM3 connected by RS232
interface to the PPCK+ COM2 port.
To access run AutoZ by COM2 press [SPECIAL] and select <1AutoZ> ,
<4run> , <2COM2> . The display is:
1. Pressure reading, units and mode of the active
RPT range.
2. Active range indicator.
3. Pressure reading of the RPM connected to
PPCK+'s COM2 port.
2
3
14.10 psi a H3
ZSTD: 0.0000
Old ZOFFSET: 0.0 Pa
New ZOFFSET: 978.5 Pa
2
3
14.10 psi a H3
ZSTD: 14.07