DH Instruments PPC4, Operation And Maintenance Manual

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PPC4™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company Page 2
1.2.2 Pressure Measurement Specifications
1.2.2.1 Quartz Reference Pressure Transducer (Q-RPT)
Quartz reference pressure transducers (Q-RPTs) can be installed in PPC4 to obtain
low uncertainty pressure measurement. One or two Q-RPTs can be included in the
PPC4 and/or additional Q-RPTs can be used externally mounted in a
DHI RPM4
Reference Pressure Monitor (see Section 3.2.5).
The type (Axxx, Gxxx, BGxxx, BAxxx) and range of the Q-RPT module(s) determines
the PPC4 measurement specifications.
All Q-RPTs whose maximum pressure is over 200 kPa (30 psi) are of the absolute
pressure type (Axxx) using an evacuated, permanently sealed reference. Axxx Q-RPTs
can measure absolute, gauge and negative gauge pressure. Gauge pressure with an
Axxx (absolute) Q-RPT is obtained by offsetting atmospheric pressure and applying
dynamic compensation for atmospheric changes using the on-board barometer (see
Section 3.2.4). Gxxx (gauge) Q-RPTs can measure positive gauge pressure only.
BGxxx (bi-directional gauge) Q-RPTs can measure gauge and negative gauge
pressure. See Section 3.2.11 for additional information on absolute, gauge and
negative gauge measurement modes.
PPC4s configured with two Q-RPT modules have only one TEST(+) and TEST(-) port.
PPC4 internal valves and logic handle switching between the two Q-RPTs as needed.
Note
Q-RPTs are available with three different performance levels,
PREMIUM class, STANDARD class, and FULL SCALE
STANDARD class. See the product label on the PPC4 rear panel,
the label on the Q-RPT module on the rear panel and/or the
product calibration reports to determine the class of the Q-RPTs
installed in PPC4.
Table 1. Reference Pressure Transducer (Q-RPT) Designations and Ranges
RPT
DESIGNATION
SI VERSION US VERSION
MAXIMUM
PRESSURE
Absolute
[kPa]
MAXIMUM
PRESSURE
Gauge
[kPa]
MAXIMUM
PRESSURE
Absolute
[psi]
MAXIMUM
PRESSURE
Gauge
[psi]
A14M
1
14 000 14 000 2 000 2 000
A10M
1
10 000 10 000 1 500 1 500
A7M
1
7 000 7 000 1 000 1 000
A3.5M
1
3 500 3 500 500 500
A2M
1
2 000 2 000 300 300
A1.4M
1
1 400 1 400 200 200
A700K
1
700 700 100 100
A350K
1
350 250 50 35
A200K
1
200 100 30 15
A160K
1
160 60 23 8