PPC2+™ Operation and Maintenance Manual
Page 25
©2001 DH Instruments, Inc.
Ranges and Identification
The currently active reference transducer and range is continuously displayed in the
upper right hand corner of the main run screen and most other screens. See Table 1
for a complete listing of the RPTs available and their ranges.
Hi RPT: The RPT in a single RPT PPC2+ or the RPT with the highest maximum
range in a dual RPT PPC2+ is referred to as the Hi RPT.
Lo RPT: The RPT with the lower maximum range in a dual RPT PPC2+ is referred to
as the Lo or secondary RPT.
Range 1, 2 or 3: The three ranges of an RPT are referred to as 1 = lo range, 2 = mid
range, 3 = hi range.
Table 5. PPC2+ Range Identification Summary
REFERENCE PRESSURE
TRANSDUCER
AND RANGE
DESIGNATION
DISPLAY SYMBOL *
Lo RPT, Lo range
Lo, 1
L1
Lo RPT, Mid range
Lo, 2
L2
Lo RPT, Hi range
Lo, 3
L3
Hi RPT, Lo range
Hi, 1
H1
Hi RPT, Mid range
Hi, 2
H2
Hi RPT, Hi range
Hi, 3
H3
* The display symbol is included in the upper, right hand corner of most
PPC2+ menu displays as a convenient indicator of active range.
3 . 2 D I R E C T F U N C T I O N K E Y S
3.2.1 RANGE
m
PURPOSE
To view and/or change the pressure measurement range.
m
PRINCIPLE
Each PPC2+ has three or six ranges (see Section 3.1.2.5).
Pressing the [RANGE] function key allows the ranges to be viewed and selected,
including automated switching of RPTs when necessary, with built-in logic to prevent
accidental overpressure of the Lo RPT if present.
PPC2+ functions and settings such as pressure unit of measure (UNIT), control mode
(CONTROL) and upper limit (UPPER LIMIT) are range specific. Changes made while in
one range apply to that range only and will not affect the other ranges. Only the HEAD
function is not range specific (see Section 3.2.7).
Summary of Contents for PPC2+
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