DH Instruments PPC3 - Operation with a Pg7000 Piston Gauge; Direct Function Keys Summary; Table 4. Settings and What They Are Specific to (Range, Measurement Mode, Q-RPT, System)

3. OPERATION
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settings are stored with the range and recalled whenever the range is made active. This makes
setting up and saving ranges a convenient way to store and recall frequently used operating
configurations. See Table 4 for a listing of PPC3 adjustments and settings and whether they
are range, Q-RPT or system specific.
The ranges available on a PPC3 system are accessed using [RANGE] (see Section 3.3.1)
and/or created using [AutoRange] (see Section 3.3.4). External Q-RPTs connected to the
PPC3 (see Section 3.2.4) are initialized using [RPT] (see Section 3.3.5).
Table 4. Settings and What They Are Specific To (Range, Measurement Mode, Q-RPT, System)
SETTING PURPOSE SPECIFIC TO SECTION
Unit Set pressure unit of measure Range 3.3.2
Mode Set pressure measurement mode
(absolute, gauge, negative gauge)
Range 3.3.3
Resolution Set pressure display resolution Range 3.4.2
Jog Set jog step size Range 3.4.3
Control Set pressure control mode and
parameters
Range 3.4.6
Upper Limit Set upper and lower pressure limit alarm Range and measurement mode 3.4.4
AutoZ Run AutoZ, ON/OFF, set and view value Range and measurement mode 3.5.1
Screen
Saver,
Sound,
Time, ID,
Level
Set system user preferences System 3.5.5
Head Set fluid head correction height, fluid, unit
of measure
System 3.3.7
3.5.3
Control
reference
Set EXHAUST port pressure condition System 3.5.7.2
Purge Enable/disable purge function System 3.5.7.4
Valve
Drivers
Set status of external valve drivers System 3.4.7
Lo vnt
Set status of TEST(-) vent valve,
if present
System 3.5.7.5
Cal Various Q-RPT and utility sensor
calibration functions
Q-RPT, utility sensor or barometer 3.5.8
3.2.6 OPERATION WITH A PG7000 PISTON GAUGE
PPC3 can act as a pressure control source to automated setting pressure and floating the
piston of a PG7000 gas operated piston gauge.
For automated operation, the PPC3 communicates with the PG7000 through an RS232
connection from the PG7000 COM3 port to the PPC3 COM1 port. Pressure control
commands are sent from the PG7000 when it is in “AutoGen” mode (see the PG7000
Operation and Maintenance Manual).
The PPC3 may also be operated manually using its direct pressure control keys (see Section 3.1.3).
3.2.7 DIRECT FUNCTION KEYS SUMMARY
Local operation of PPC3 is through the front panel keypad. To minimize menu layers, the
keypad numerical keys also provide direct access to the most commonly used functions. The
function accessed is labeled on the bottom half of the key. Direct function keys are active