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RPM4™ OPERATION AND MAINTENANCE MANUAL
© 2004-2007 DH Instruments, a Fluke Company Page 2
1.2 SPECIFICATIONS
1.2.1 GENERAL SPECIFICATIONS
Power Requirements
85 to 264 VAC, 50/60 Hz, 25 VA max consumption
and 12VDC, 1.2 A
Operating Temperature Range
15 to 35 °C
Storage Temperature Range
- 20 to 70 °C
Vibration
Ventilation
Meets MIL-T-28800D
To prevent product overheating, provide proper ventilation. Allow 10 cm
(4 in.) clearance from rear panel cooling fan.
Weight
5 kg (11 lb) approx. (varies slightly with number and type of Q-RPT modules)
Dimensions
10 cm H x 22.7 cm W x 24 cm D (3.9 in. x 9.3 in. x 9.5 in.)
Microprocessors
Motorola 68302, 16 MHz
Communication Ports
Fuses
RS232 (COM1, COM2), IEEE-488.2
1 A, 250 VAC fuse, 5 x 20 mm, time lag type fuse
Internal power supply fuse not replaceable by operator: 2.5A, 250 VAC
Pressure Ranges
One or two independent quartz reference pressure transducer (Q-RPT)
modules cover vacuum to 280 MPa (40 000 psi)
Operating Medium
Any clean, dry, non-corrosive gas or liquid. Q-RPTs less than 7 MPa full scale,
gas only
Pressure Connections Q-RPTs up to A70M Q-RPTs > A70M
TEST(+): 1/8 in. NPT F DH500 F
TEST(-): 1/8 in. NPT F None
VENT or ATM: 10-32 UNF (VENT) 10-32 UNF (ATM)
DH500 is a gland and collar type fitting for 6mm (1/4 in.) coned and left
hand threaded tubes equivalent to AE F250C, HIP HF4, etc.
Self Defense System (SDS™)
Included on all gas operated Q-RPT modules of A7M or lower. Isolates
Q-RPT module TEST(+) port and vents it to atmosphere. SDS is not included
with liquid filled Q-RPTs.
Pressure Limits
Maximum Working Pressure: 104 % Q-RPT maximum
Maximum Pressure Without Damage: 125 % Q-RPT maximum
Maximum SDS Protection Pressure: 10 MPa (1 500 psi):
Without Damage: 13 MPa (2 000 psi)
CE Mark
Available, must be specified
1.2.2 PRESSURE MEASUREMENT SPECIFICATIONS
1.2.2.1 QUARTZ REFERENCE PRESSURE TRANSDUCER (Q-RPT)
RPM4 can be configured with one or two quartz reference pressure transducer (Q-RPT)
modules to measure pressure. The type (Axxx, Gxxx, BGxxx, BAxxx) and range of
the Q-RPT module(s) determines the RPM4 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 Q-RPT is defined by offsetting atmospheric pressure and
applying dynamic compensation for atmospheric changes using the on-board
barometer (see Section 3.2.2). 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 3.3.3 for additional information on
absolute, gauge and negative gauge measurement modes.
RPM4s configured with two Q-RPT modules have independent TEST ports and can
measure separately. Two Q-RPTs can also be used together to operate in
differential mode (see Section 3.3.3.1) and parallel mode (see Section 3.2.4).