DH Instruments PPC2 AF

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PPC2 AF OPERATION AND MAINTENANCE MANUAL

When the RANGE function key is first pressed, the current reference transducer and range

being used are displayed, for example:

1. Identifies reference transducer in use (Lo or Hi).

2. Identifies range of that reference transducer currently in use

(1, 2 or 3, Lo to Hi).

3. Abbreviated range designation.

4. Units of measure and pressure range for that transducer and

range number when used in gauge (g) or absolute(a) mode.

Current LO, Rng3 L3

psi 35 g/50 a

Pressing the

key or pressing the RANGE key again causes the screen to step through

the other available ranges in sequence Lo to Hi, for example:

1. Identifies reference transducer (Lo or Hi).

2. Identifies range of number on that reference transducer (1, 2 or 3).

3. Abbreviated range designation.

4. Units of measure and pressure range for that transducer and

that range when used in gauge (g) or absolute(a) mode.

Select HI, Rng1 H1

psi 300 g/300 a

Range limits are given in the pressure unit that is currently active for that range.

To protect against overpressure of the Lo pressure reference transducer and avoid

accidentally exceeding range upper limits, the active range can only be changed when the

system is vented. If ENTER is pressed while in the RANGE function when PPC2 AF is not

vented, the display will indicate "Vent system fully to change range". Press ESCAPE or ENTER

to reach the main run screen and vent using the VENT direct pressure control key. Once

the system has fully vented, use the RANGE function to make the desired range change.

RANGE SPECIFIC FUNCTIONS AND SETTINGS

In general, PPC2 AF functions and settings are channel specific. They are set and stored for

each range so that changing them when in one range does not change them in the other

ranges and when you return to a range, you will find the settings you left.

The only functions and settings that are not range specific are:

Functions: HEAD, ANALOG

Setup Menu: 1ControlRef, 4Drivers

3.2.2 UNIT

 PURPOSE

To specify the pressure unit in which PPC2 AF displays pressure values.

DH Instruments PPC2 AF - Unit