Fluke Calibration RPM4-100K is a precise reference pressure monitor designed for high-performance pressure measurement, calibration and transfer-standard applications. Equipped with Fluke Calibration’s advanced quartz reference pressure transducer technology, the RPM4-100K provides excellent precision, stability and resolution for demanding laboratory and industrial pressure calibration tasks.
The RPM4 platform is based on Fluke Calibration’s Q-RPT Quartz Reference Pressure Transducer technology. Each Q-RPT measures pressure by detecting changes in the natural oscillating frequency of a quartz crystal caused by pressure-induced stress. Individual transducers are characterized against primary pressure standards to provide the high level of measurement performance required for professional pressure metrology.
In the A100K configuration, the RPM4 covers absolute pressure up to 110 kPa absolute and gauge pressure up to 10 kPa, corresponding to approximately 16 psi absolute and 1.5 psi gauge. This makes the RPM4-100K particularly suitable for precise low-pressure and absolute-pressure measurement applications.
Advanced functions including Infinite Ranging™, AutoRange™, AutoZero, automated leak testing and SDS™ Self Defense System protection simplify daily operation and allow the pressure monitor to be adapted to different calibration tasks.
RS232 and IEEE-488 communication interfaces enable integration into automated pressure calibration systems and laboratory software environments.
At europascal, the Fluke Calibration RPM4-100K can be integrated with suitable pressure generation and control equipment to create a professional pressure calibration system. For calibration and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
The Fluke Calibration RPM4-100K combines high-performance reference pressure measurement with advanced automation and protection functions.
Key advantages include:
- Precision reference pressure monitor
- Q-RPT quartz reference pressure transducer technology
- A100K low-pressure configuration
- Up to 110 kPa absolute
- Up to 10 kPa gauge
- Approximately 16 psi absolute
- Approximately 1.5 psi gauge
- Absolute pressure measurement
- Gauge pressure measurement
- Compound gauge capability depending on configuration
- High measurement precision
- Excellent long-term stability
- Resolution adjustable down to 1 ppm
- Infinite Ranging™
- AutoRange™
- AutoZero functionality
- Automated leak testing
- Pressure rate measurement
- Pressure averaging
- High/low pressure recording
- Freeze function
- Deviation display
- SDS™ Self Defense System
- Automatic Q-RPT protection
- RS232 communication
- IEEE-488.2 communication
- Remote operation
- Suitable for automated calibration
- Optional battery operation
- Optional rack mounting
- Compact laboratory design
- Professional pressure metrology platform
A100K Pressure Range
The Fluke Calibration RPM4-100K uses the A100K Q-RPT range.
The manufacturer’s specification for the A100K is:
Maximum absolute pressure: 110 kPa
and:
Maximum gauge pressure: 10 kPa.
In imperial pressure units, this corresponds approximately to:
16 psi absolute
and:
1.5 psi gauge.
This range makes the RPM4-100K particularly suitable for accurate measurements around atmospheric pressure and for relatively low gauge pressures.
Absolute Pressure Measurement
The A100K Q-RPT supports:
absolute pressure measurement.
Absolute pressure is referenced to a vacuum rather than atmospheric pressure.
This makes the RPM4-100K useful for applications where accurate determination of absolute pressure is required.
Absolute pressure measurement is particularly relevant in:
- Pressure calibration
- Atmospheric-pressure-related measurements
- Research laboratories
- Process instrumentation
- Reference pressure measurements
- Transfer standard applications
Gauge Pressure Measurement
The Fluke Calibration RPM4-100K can also operate in gauge pressure mode.
Gauge pressure is measured relative to atmospheric pressure.
With the A100K Q-RPT, the maximum gauge pressure range is approximately:
10 kPa / 100 mbar / 1.5 psi.
This provides high-performance measurement capability for sensitive low-pressure instruments.
Q-RPT Technology
At the heart of the Fluke Calibration RPM4-100K is the:
Quartz Reference Pressure Transducer – Q-RPT.
Unlike conventional industrial pressure sensors, the Q-RPT is specifically designed for precision pressure metrology.
Pressure-induced stress changes the natural oscillation frequency of a quartz element.
The RPM4 electronics measure this change and convert it into a highly precise pressure value.
Each Q-RPT is individually evaluated and characterized using primary pressure standards before qualification for use in the RPM4 platform.
High Measurement Performance
The RPM4 platform was designed as a professional reference pressure monitor.
Depending on the Q-RPT class and configuration, Fluke specifies measurement uncertainty for RPM4 systems as low as:
±0.008% of reading.
The exact uncertainty applicable to an RPM4-100K depends on the installed Q-RPT class, operating mode, calibration and configuration.
For calibration work, the specification for the exact instrument configuration should therefore always be used.
Standard and Premium Q-RPT Classes
RPM4 Q-RPTs were available in different performance classes.
These include:
Standard
and:
Premium.
The Premium Q-RPT configuration provides enhanced measurement performance and supports the full advantages of the RPM4 Infinite Ranging concept.
The exact model designation identifies the installed Q-RPT range and performance class.
Infinite Ranging™
A major feature of the Fluke Calibration RPM4-100K platform is:
Infinite Ranging™.
Instead of treating the pressure monitor as an instrument with only one fixed operating range, Infinite Ranging allows the RPM4 to optimize its measurement characteristics for the actual range being used.
This is particularly useful when calibrating devices with ranges significantly below the maximum capability of the installed Q-RPT.
AutoRange™
The:
AutoRange™
function simplifies configuration of the RPM4 for a particular calibration task.
The operator enters the required maximum pressure and measurement mode.
The RPM4 then automatically configures relevant measurement parameters.
Depending on the installed configuration, AutoRange can:
- Select the appropriate Q-RPT
- Set the pressure measurement mode
- Adjust display resolution
- Configure overpressure limits
- Optimize measurement characteristics
- Adapt uncertainty calculations for supported Premium Q-RPT configurations
This reduces manual setup and helps ensure that the RPM4-100K is correctly configured for the intended range.
AutoZero
The Fluke Calibration RPM4-100K also supports:
AutoZero.
Zeroing is an important part of precision pressure measurement because small zero shifts can influence the measurement result, particularly at low pressures.
AutoZero provides a systematic method for maintaining Q-RPT measurement performance.
Depending on the measurement mode and configuration, zeroing can be performed against an appropriate pressure reference.
SDS™ Self Defense System
Low-pressure reference transducers can be particularly sensitive to accidental overpressure.
For this reason, Fluke Calibration equips applicable RPM4 Q-RPT modules with the:
SDS™ Self Defense System.
The SDS automatically isolates and vents the Q-RPT when it is not in use or when excessive pressure is detected.
This provides an important level of protection for the precision reference transducer.
Overpressure Protection
For Q-RPT modules up to 7 MPa, the SDS system allows the module to remain connected to pressures up to:
10 MPa / 1,500 psi
without requiring the user to manually isolate or disconnect the sensitive Q-RPT.
This is particularly valuable for a low-pressure configuration such as the RPM4-100K.
The normal measurement and maximum working pressure limits of the Q-RPT must nevertheless always be observed during measurement.
Automated Leak Check
The Fluke Calibration RPM4-100K includes an integrated:
LEAK CHECK
function.
The RPM4 measures the average rate of pressure change over a user-defined period.
This allows the operator to assess whether the connected pressure system is sufficiently leak-tight before beginning a precision calibration.
Leak testing is particularly important at low pressures because even small leaks can cause noticeable measurement drift.
Pressure Rate Measurement
The RPM4 can display:
pressure rate of change.
This provides useful information about pressure stability and dynamic behavior.
Before recording a calibration point, the operator can determine whether the pressure is sufficiently stable.
Pressure Averaging
Another integrated function is:
pressure averaging over time.
Averaging can help evaluate pressure under conditions where small fluctuations are present.
This provides additional flexibility when using the RPM4-100K as a laboratory reference monitor.
High and Low Values
The RPM4 can record:
high and low pressure values.
This allows the operator to monitor pressure variations during a test.
The function can be useful for:
- Stability testing
- Pressure monitoring
- System characterization
- Calibration setup evaluation
Freeze Function
The Fluke Calibration RPM4-100K also includes a display freeze function.
This allows a pressure indication to be held on the display for convenient recording or evaluation.
Deviation from Set Point
The RPM4 can display the:
deviation from a defined pressure set point.
This is particularly useful when manually adjusting pressure.
Instead of calculating the difference between the target and actual pressure separately, the operator can directly observe the remaining deviation.
AutoTest
The RPM4 platform provides:
AutoTest.
AutoTest can automate calibration routines including tolerance testing and data logging.
This allows frequently repeated pressure calibration sequences to be standardized and executed more efficiently.
Reference Pressure Monitor – Not a Pressure Controller
The Fluke Calibration RPM4-100K is a:
reference pressure monitor.
It measures pressure with high precision.
It does not independently generate or automatically control the test pressure.
A complete manual calibration system therefore consists of:
Pressure Generator + RPM4-100K + Device Under Test
The pressure generator creates the required pressure.
The RPM4-100K measures the reference pressure.
The DUT is exposed to the same pressure.
Its indication can then be compared with the RPM4-100K.
Pressure Gauge Calibration
The Fluke Calibration RPM4-100K can be used as a high-performance reference for calibration of low-pressure gauges.
A suitable pneumatic pressure generator is connected to the calibration system.
The pressure is applied simultaneously to the RPM4-100K and the device under test.
The DUT indication can then be compared directly with the reference pressure measured by the RPM4-100K.
Digital Pressure Gauge Calibration
The same comparison principle can be used for digital pressure gauges.
The RPM4-100K provides the reference pressure value while a suitable pressure generator produces the required test pressure.
Defined calibration points can be approached across the measurement range of the DUT.
Pressure Transmitter Calibration
The Fluke Calibration RPM4-100K can also be integrated into a pressure transmitter calibration setup.
A typical configuration consists of:
Pressure Generator + RPM4-100K + Electrical Calibrator + Pressure Transmitter
The RPM4-100K measures the applied reference pressure.
The electrical calibrator measures the transmitter output.
For a conventional process transmitter, this is commonly:
4 to 20 mA.
This allows the complete pressure-to-electrical-output characteristic to be evaluated.
Pressure Sensor Calibration
Low-pressure sensors and pressure transducers can also be calibrated using the RPM4-100K as the reference pressure measurement device.
This is particularly useful when high precision and low measurement uncertainty are required.
Manual Pressure Generation
For manual calibration systems, the RPM4-100K can be combined with a suitable low-pressure pneumatic pressure generator.
The pressure source generates and adjusts pressure while the RPM4-100K continuously measures the actual pressure.
This provides a straightforward comparison calibration system.
Automated Pressure Calibration
The Fluke Calibration RPM4-100K is also designed for integration into automated calibration systems.
The reference monitor can be connected to a compatible pressure controller.
The controller generates and regulates pressure while the RPM4-100K provides high-performance reference measurement.
This separation between pressure control and reference measurement provides considerable flexibility when designing calibration systems.
RS232 Communication
The RPM4 provides:
RS232 communication.
Two serial communication ports are available on the RPM4 platform.
These interfaces can be used for remote control, automated data acquisition and integration with calibration software.
IEEE-488.2 Communication
The Fluke Calibration RPM4-100K also supports:
IEEE-488.2 / GPIB.
GPIB is widely used in professional calibration laboratories and automated measurement systems.
This makes the RPM4 particularly suitable for integration into existing calibration environments.
COMPASS for Pressure
RPM4 reference pressure monitors can be integrated into automated pressure calibration systems using suitable calibration software.
Fluke Calibration’s pressure calibration ecosystem includes COMPASS for Pressure, which can be used to automate compatible pressure calibration equipment and procedures.
This can reduce manual data entry and improve repeatability for recurring calibration tasks.
External Q-RPT Integration
The RPM4 platform can also serve as a reference pressure monitor for external Q-RPT configurations.
This makes the system highly flexible when different pressure ranges or measurement architectures are required.
Adjustable Resolution
The Fluke Calibration RPM4-100K provides resolution:
down to 1 ppm.
The displayed resolution is user adjustable.
This allows the indication to be adapted to the measurement task and prevents unnecessary display digits when they are not required.
Fluid Head Correction
The RPM4 includes a:
HEAD
function.
This provides automatic fluid-head correction for differences in height between the reference pressure monitor and the device under test.
Height differences can cause measurable pressure differences, particularly in precision pressure calibration.
The correction function helps account for this effect.
Compact Laboratory Design
The RPM4 platform combines high-performance pressure measurement with compact dimensions.
This makes the RPM4-100K suitable for:
- Calibration laboratories
- Reference laboratories
- Production calibration
- Research laboratories
- Automated test systems
- Transfer standard applications
The compact design also simplifies integration into larger calibration systems.
Optional Rack Mounting
A rack mount kit is available for installation of the RPM4 in a standard:
19-inch rack.
This is useful for permanent automated calibration installations.
Optional Battery Operation
An optional battery pack allows the RPM4 to operate independently of mains power.
This can be useful when the reference monitor must be transported or used as a transfer standard between different calibration locations.
Technical Highlights
| Feature | Fluke Calibration RPM4-100K |
|---|---|
| Product type | Reference Pressure Monitor |
| Reference technology | Q-RPT quartz transducer |
| Q-RPT range | A100K |
| Maximum absolute pressure | 110 kPa |
| Maximum gauge pressure | 10 kPa |
| Maximum absolute pressure | Approx. 16 psi |
| Maximum gauge pressure | Approx. 1.5 psi |
| Measurement modes | Absolute, gauge, compound gauge |
| Resolution | To 1 ppm, user adjustable |
| Range optimization | Infinite Ranging™ |
| Automatic configuration | AutoRange™ |
| Zero function | AutoZero |
| Q-RPT protection | SDS™ Self Defense System |
| Leak check | Integrated |
| Pressure rate | Integrated |
| Pressure averaging | Integrated |
| High/low function | Integrated |
| Communication | RS232, IEEE-488.2 |
| Remote operation | Yes |
| Automated calibration | Yes |
| Optional battery | Yes |
| Optional rack mounting | Yes |
RPM4-100K vs. RPM4 BA100K
The Fluke Calibration RPM4-100K should not be confused with the:
RPM4 BA100K Reference Pressure Barometer.
The A100K is a Q-RPT range intended for pressure measurement with absolute and gauge capability.
The A100K range extends to:
110 kPa absolute
and:
10 kPa gauge.
The:
BA100K
is a dedicated barometric pressure Q-RPT.
Its operating range is approximately:
70 kPa to 110 kPa absolute.
The BA100K is specifically optimized for high-performance atmospheric pressure measurement and barometric applications.
This distinction is important when selecting the appropriate RPM4 configuration.
RPM4-100K vs. RPM4-AD
The Fluke Calibration RPM4-100K is also different from the:
Fluke Calibration RPM4-AD.
The RPM4-AD is a dedicated air data configuration for measuring:
- Pt
- Ps
- Qc
- Altitude
- Airspeed
The RPM4-100K is a general reference pressure monitor configuration intended for precision pressure measurement rather than dedicated air data calculations.
Typical Applications
The Fluke Calibration RPM4-100K is suitable for:
- Low-pressure calibration
- Absolute pressure calibration
- Gauge pressure calibration
- Reference pressure measurement
- Pressure gauge calibration
- Digital pressure gauge calibration
- Pressure transmitter calibration
- Pressure sensor calibration
- Pressure transducer calibration
- Pressure switch testing
- Comparison calibration
- Transfer standard applications
- Automated pressure calibration
- Calibration laboratory applications
- Research and development
- Production testing
- Pressure metrology
Why Choose the Fluke Calibration RPM4-100K?
The Fluke Calibration RPM4-100K combines high-performance Q-RPT pressure measurement with a sophisticated range of functions developed specifically for precision pressure metrology.
The A100K Q-RPT provides absolute pressure measurement up to 110 kPa and gauge pressure measurement up to 10 kPa, making the configuration particularly suitable for accurate low-pressure measurements.
Fluke Calibration’s Q-RPT technology provides excellent stability, precision and resolution, while Infinite Ranging™ and AutoRange™ allow the instrument to adapt its measurement characteristics to the actual calibration range.
AutoZero helps maintain reference performance, while the SDS™ Self Defense System protects the sensitive Q-RPT against accidental excessive pressure.
Integrated leak checking, pressure-rate measurement, averaging, high/low recording and deviation functions provide useful tools for professional calibration laboratories.
RS232 and IEEE-488.2 interfaces allow the RPM4-100K to be integrated into automated calibration systems.
At europascal, the Fluke Calibration RPM4-100K can be combined with suitable pressure generation and control equipment to create a complete high-performance pressure calibration solution.
For professional calibration and metrological traceability, visit the europascal Calibration Service.
Further products from Fluke Calibration are available from europascal.
Manufacturer information about the Fluke Calibration RPM4-100K and the RPM4 reference pressure monitor platform is available on the official Fluke Calibration website.
