DH Instruments PPC2 AF - Specifications; General Specifications; Pressure Measurement Specifications; High Pressure Reference Transducer (Hi Ref)

1. INTRODUCTION
Page 9 © 1998 DH Instruments, Inc.
1.3 SPECIFICATIONS
1.3.1 GENERAL SPECIFICATIONS
Power Requirements
85 to 264 VAC, 47 to 440 Hz, 30 VA max consumption.
Operating Temperature Range
15 to 35 °C
Storage Temperature Range
- 20 to 70 °C
Vibration
Meets MIL-T-28800D
Weight
12.8 kg (28.2 lb)
Dimensions
7.1" H X 12.6" W X 15.8" D (18 cm X 32 cm X 40 cm)
Microprocessor
Motorola 68302, 16 MHz
Communication Port
RS232 (COM1)
Pressure Ranges
-15 to 1 000 psi (7 MPa) gauge/0 to 1 000 psi absolute in six ranges using two
reference pressure transducers and a barometer
Operating Medium
Clean, dry, non-corrosive gas
Pressure Connections
Supply: 1/8 in. NPT F
Test: 1/4 in. NPT F
Vent: 1/4 in. NPT F
Exhaust: 1/4 in. NPT F
AutoZero: 1/4 in. NPT F
1.3.2 PRESSURE MEASUREMENT SPECIFICATIONS
PPC2 AF measures pressures in gauge and absolute mode in six ranges using two reference
pressure transducers and a barometer.
The reference pressure transducers are of the absolute pressure type using an evacuated,
permanently sealed reference. They are used to measure gauge pressures by atmospheric
offset determined by direct measurement when the reference transducer is vented. The
atmospheric offset is dynamically compensated while operating in gauge mode using
measurements of the changes in atmosphere provided by a separate barometer.
1.3.2.1 HIGH PRESSURE REFERENCE TRANSDUCER (HI REF)
Ranges
High (3): 0 to 1 000 psi (7 MPa) gauge/absolute
Mid (2): 0 to 600 psi (4 MPa) gauge/absolute
Low (1): 0 to 300 psi (2 MPa) gauge/absolute
Measurement Precision
(Combined Linearity, Hysteresis
and Repeatability)
± 0.01% F.S. of each range
Stability (6 Month with Use of
AutoZero Function)
± 0.005% F.S. of maximum range
Resolution
1 ppm of maximum range
1.3.2.2 LOW PRESSURE REFERENCE TRANSDUCER (LO REF)
Ranges
High (3): - 15 to 35 psi (250 kPa) gauge
0 to 50 psi (350 kPa) absolute
Mid (2): - 15 to 15 psi (100 kPa) gauge
0 to 30 psi (200 kPa) absolute
Low (1): - 15 to 0 psi gauge
0 to 15 psi (100 kPa) absolute
Measurement Precision
(Combined Linearity, Hysteresis
and Repeatability)
± 0.01 % F.S. of each range
Stability (6 Month with Use of
AutoZero Function)
± 0.005 % F.S. of maximum range
Resolution
1 ppm of maximum range