RPM4 Reference Pressure Monitorisdifferent from traditional pressure monitors.State-of-the-art performance from very low pressure to 280 MPa (40,000 psi)_ advanced on-board features_ compact and rugged_ full local and remote communications_ RPM4 is the perfect solution in a wide variety of high end pressure calibration, testing and measurement applications.
Infinite Ranging and AutoRange
Infinite Ranging gives RPM4 Reference Pressure Monitorunprecedented versatility in adapting to the specific range of operation. With the easy-to-use AutoRange function, a few simple key strokes or a single remote command string at the start of a test adapt every feature of the pressure monitor to optimize it for the range to be covered. Just enter the maximum pressure and the measurement mode. AutoRange then:
Selects and activates the most appropriate Q-RPT to cover the specified range and measurement mode.
Sets the pressure unit of measure. Activates absolute, gauge or compound gauge measurement.
Adjusts display resolution to the appropriate level for the range.
Adjusts overpressure alarms to the actual range of operation.
Reduces measurement uncertainty proportionally to the selected range (premium class Q-RPTs only).
Note: The use of RPM4’s Infinite Ranging and AutoRange feature is recommended to optimize operation for a specific range but is not required to obtain % of reading measurement specifications.
SDS Q-RPT self defense system
All Q-RPT modules up to 7 MPa (1 000 psi) include the unique Self Defense System (SDS). SDS valves automatically isolate and vent the module’s Q-RPT when it is not in use or an overpressure is about to occur. With SDS, any Q-RPT module can be left connected to pressure up to 10 MPa (1 500 psi) without needing to isolate or disconnect it.
Advanced on-board functions
RPM4 pressure monitorsprovides a variety of advanced on-board pressure data functions including:
Special data such as pressure average over time, rate of change, hi/lo, freeze, deviation from set point.
Differential mode directly measures the difference between two Q-RPTs including taring at the line pressure.
Parallel measurement uses two Q-RPTs redundantly as one.
Leak check measures average pressure rate of change over a user set time period.
AutoTest automates calibration routines with tolerance testing and data logging.
Quartz reference pressure transducer (Q-RPT) modules
RPM4’s outstanding pressure measurement specifications are made possible by Fluke Calibration’s exclusive quartz reference pressure transducer (Q-RPT) modules.
Q-RPTs measure pressure by measuring the change in the natural oscillating frequency of a quartz crystal with pressure induced stress. To be qualified for use in a Q-RPT module, each transducer is individually evaluated and characterized using primary pressure standards. Only transducers exhibiting required levels of linearity, repeatability and stability are selected. A proprietary compensation model, derived from more than 15 years experience with thousands of quartz pressure transducers, is applied to optimize the metrological characteristics needed in a transfer standard. Standard and premium class Q-RPT modules are available to best fit your performance and budgetary requirements.
A unique dynamic compensation for atmospheric pressure system uses an independent on-board barometer to provide seamless switching between absolute, gauge and compound gauge modes at any time. The barometer is used only to measure the small variations in atmospheric pressure that occur during gauge mode operation so its absolute error and drift over time do not contribute to measurement uncertainty. Q-RPT modules offer the advantages of:
% of reading measurement uncertainty with AutoRange span turndown available
Negligible warm up time
No gas species dependence
Quartz element isolated from test medium
Low sensitivity to orientation
Q-PRTs and ranges

Q-RPT Designation

SI Version

US Version

Measurement MODE Supported

Operating Media

SDSTM Self Defense System

Maximum Range [kPa] Absolute
Maximum Range [kPa] Gauge
Maximum Range [psi] Absolute
Maximum Range [psi] Gauge
A280M-L
280 000
280 000
40 000
40 000

Absolute, Gauge and Compound Gauge

Gas StndardOil available

Not available

A200M-L
200 000
200 000
30 000
30 000
A140M-L
140 000
140 000
20 000
20 000
A100M-L
100 000
100 000
15 000
15 000
A70M
70 000
70 000
10 000
10 000

Gas StandardOil availableGas only

A40M
40 000
40 000
6 000
6 000
A20M
20 000
20 000
3 000
3 000
A14M
14000
14000
2000
2000
A10M
10 000
10 000
1500
1500

Included

A7M
7000
7000
1000
1000
A3.5M
3500
3 500
500
500

Gas only

A2M
2 000
2 000
300
300
A1.4M
1400
1400
200
200
A700K
700
700
100
100
A350K
350
250
50
35
A200K
200
100
30
15
A160K
160
60
23
8
A100K
110
10
16
1.5
BA100K1
110

16

G200K

200

30

Gauge only

G100K

100

15
BG15K2

15

2.2
G15K

15

2.2
1 BA100K is a barometer with a low point of 70 kPa (10 psia).2 BG15K is bidirectional gauge from – 15 to + 15 kPa (- 2.2 to + 2.2 psi).
Compatible with PPC4 Automated Pressure Controller
RPM4 can be used as an external reference pressure measurement device for a Fluke Calibration PPC4, fully automated, pressure controller/calibrator. One RPM4 can be connected to PPC4 by 9-pin RS232 cable. The RPM4’s Q-RPT become part of the PPC4 system and are managed by the PPC4 transparently to the user. There is only one test connection for the PPC4 system’s full range of operation.

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