The Fluke Calibration 9140 is a portable dry block temperature calibrator designed for accurate, reliable and efficient calibration of industrial temperature sensors, resistance thermometers, thermocouples and temperature switches.
With a temperature range from +35 °C to +350 °C, excellent temperature stability and a compact design, the Fluke Calibration 9140 provides a practical solution for professional temperature calibration in laboratories, industrial facilities and field applications.
The instrument combines precise temperature control with fast heating performance. It can reach its maximum temperature of 350 °C in approximately 12 minutes, helping reduce waiting times during calibration procedures.
The Fluke Calibration 9140 provides temperature stability of ±0.03 °C at 50 °C and ±0.05 °C at 350 °C. Its calibrated temperature display offers an accuracy of ±0.5 °C for suitable calibration well diameters.
Interchangeable calibration inserts accommodate temperature probes of different sizes and allow multiple sensors to be calibrated simultaneously.
With a weight of approximately 2.7 kg, the Fluke Calibration 9140 is particularly suitable for portable temperature calibration.
Additional features include adjustable heating and cooling rates, temperature switch testing and an RS232 communication interface.
europascal supports customers with professional temperature calibration equipment, reference thermometers and complete calibration solutions.
For professional calibration services and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
- Portable dry block temperature calibrator
- Temperature range from +35 °C to +350 °C
- Temperature stability of ±0.03 °C at 50 °C
- Temperature stability of ±0.05 °C at 350 °C
- Display accuracy of ±0.5 °C for suitable calibration wells
- Temperature uniformity of ±0.1 °C between similar sized wells
- Fast heating to 350 °C in approximately 12 minutes
- Cooling from 350 °C to 100 °C in approximately 15 minutes
- Stabilization time of approximately 7 minutes
- Calibration well depth of 124 mm
- Interchangeable calibration inserts
- Different insert configurations available
- Suitable for Pt100 and RTD calibration
- Suitable for thermocouple calibration
- Suitable for temperature switch testing
- Adjustable heating and cooling rates
- RS232 communication interface
- Compact and lightweight construction
- Weight of approximately 2.7 kg
- Suitable for laboratory and field calibration
- NIST traceable calibration certificate included
- Professional calibration support from europascal
Ideal for Demanding Calibration Applications
The Fluke Calibration 9140 is designed for temperature calibration applications requiring a portable and reliable heat source.
Industrial temperature sensors are used in production facilities, process plants, manufacturing equipment and laboratory measurement systems.
Regular calibration helps ensure that these instruments provide reliable temperature readings.
The Fluke Calibration 9140 allows temperature sensors to be exposed to defined temperatures and compared with a calibrated reference.
The instrument is particularly suitable for calibrating resistance thermometers, thermocouples and industrial temperature transmitters.
Its compact design allows calibration procedures to be performed directly at industrial facilities.
This reduces the need to transport temperature sensors to a calibration laboratory.
The Fluke Calibration 9140 is also suitable for laboratory applications where a compact and efficient temperature source is required.
Temperature Range from 35 °C to 350 °C
The Fluke Calibration 9140 provides a controlled temperature environment over a range from:
+35 °C to +350 °C
This temperature range covers many important industrial temperature calibration applications.
The instrument is particularly suitable for calibrating temperature sensors used in heating systems, industrial processes and production equipment.
The calibration block can be adjusted to different temperature setpoints within the specified range.
After stabilization, the temperature indication of the device under test can be compared with the reference temperature.
For applications requiring lower temperatures, Fluke Calibration offers the 9103 dry block calibrator with integrated cooling.
Excellent Temperature Stability
Temperature stability is an important characteristic of a dry block temperature calibrator.
The Fluke Calibration 9140 provides excellent stability throughout its operating range.
The manufacturer specifies:
±0.03 °C at 50 °C
±0.05 °C at 350 °C
These values describe the temporal stability of the calibration block under defined operating conditions.
Good temperature stability helps maintain constant temperature conditions during calibration.
This reduces measurement uncertainty contributions caused by temperature fluctuations.
Temperature stability must not be confused with temperature accuracy.
Accurate Temperature Indication
The Fluke Calibration 9140 features a calibrated temperature display.
The manufacturer specifies:
±0.5 °C display accuracy
For calibration openings larger than 6.35 mm, the specified accuracy is:
±1 °C
These specifications apply under the manufacturer’s defined measurement conditions.
For applications requiring lower measurement uncertainty, an external calibrated reference thermometer can be used.
The reference thermometer measures the actual temperature inside the calibration insert.
This allows the temperature indication of the device under test to be compared with a traceable reference temperature.
Fast Heating Performance
One of the main advantages of the Fluke Calibration 9140 is its fast heating performance.
The instrument can heat from ambient temperature to:
350 °C in approximately 12 minutes
This significantly reduces waiting times compared with slower temperature calibration sources.
Fast heating is particularly useful when calibrating several sensors at different temperature points.
The instrument also provides efficient cooling performance.
Cooling from 350 °C to 100 °C takes approximately:
15 minutes
The specified stabilization time is approximately:
7 minutes
Actual heating, cooling and stabilization times depend on ambient conditions and thermal loading.
Interchangeable Calibration Inserts
The Fluke Calibration 9140 uses interchangeable calibration inserts.
Different insert configurations are available to accommodate temperature sensors with different diameters.
The manufacturer offers several configurations.
Insert A
Insert A provides six different calibration openings:
1.6 mm, 3.2 mm, 4.8 mm, 6.35 mm, 9.5 mm and 12.7 mm.
This configuration is suitable for users calibrating temperature sensors with different diameters.
Insert B
Insert B provides six calibration openings:
- Two openings with a diameter of 4.8 mm
- Two openings with a diameter of 6.35 mm
- Two openings with a diameter of 9.5 mm
This configuration is particularly suitable for comparison calibration.
Insert C
Insert C provides six calibration openings with a diameter of:
6.35 mm
This configuration is suitable for calibrating several temperature probes of similar diameter.
Insert D
Insert D provides six metric calibration openings:
- Two openings with a diameter of 3 mm
- Two openings with a diameter of 4 mm
- Two openings with a diameter of 6 mm
This configuration is particularly suitable for industrial temperature sensors with metric diameters.
The appropriate insert should be selected according to the sensor dimensions and calibration requirements.
Calibration Well Depth
The Fluke Calibration 9140 provides a calibration well depth of:
124 mm
The available immersion depth is an important factor in precision temperature calibration.
Insufficient immersion can cause heat conduction along the sensor stem.
This may result in a temperature difference between the sensing element and the calibration block.
For accurate calibration, the sensor should be inserted sufficiently into the calibration well.
The required immersion depth depends on the sensor construction, diameter and measurement uncertainty requirements.
Temperature Uniformity
The Fluke Calibration 9140 provides good temperature uniformity between calibration wells.
The manufacturer specifies:
±0.1 °C between wells of similar size
For the largest calibration openings, temperature differences can be greater.
The manufacturer specifies a value of approximately:
0.4 °C for the largest wells
Good temperature uniformity is particularly important during comparison calibration.
It helps ensure that the reference thermometer and the device under test are exposed to similar temperatures.
The actual temperature distribution depends on insert geometry, sensor diameter and thermal loading.
Calibration of Pt100 and RTD Sensors
The Fluke Calibration 9140 is suitable for calibrating industrial resistance thermometers.
Typical examples include Pt100 and Pt1000 temperature sensors.
The sensor under test is inserted into a suitable calibration opening.
After the temperature has stabilized, the sensor indication is compared with the reference temperature.
The indication error can be calculated as:
ΔT = T_DUT − T_REF
Where:
ΔT is the temperature indication error.
T_DUT is the temperature indicated by the device under test.
T_REF is the reference temperature.
The reference temperature may be obtained from the calibrated block indication or from an external reference thermometer.
For high accuracy applications, an external calibrated reference thermometer is recommended.
Thermocouple Calibration
The Fluke Calibration 9140 can also be used for thermocouple calibration.
The thermocouple measuring junction is inserted into the calibration block.
The temperature is adjusted to the required calibration point.
After stabilization, the thermoelectric voltage is measured using a suitable instrument.
The measured voltage can then be compared with the expected thermoelectric voltage for the corresponding thermocouple type.
The measurement uncertainty must include the reference temperature, thermocouple measurement system and reference junction compensation.
Temperature Transmitter Calibration
The Fluke Calibration 9140 is suitable for industrial temperature transmitter calibration.
A temperature sensor connected to a transmitter can be exposed to defined temperatures.
The transmitter output is measured using an appropriate electrical measuring instrument.
The output signal can then be compared with the expected value.
This allows the performance of the temperature transmitter to be evaluated at different calibration points.
The Fluke Calibration 9140 is particularly useful for temperature transmitters operating at elevated temperatures.
Temperature Switch Testing
The Fluke Calibration 9140 supports temperature switch testing.
Temperature switches change their electrical contact state when a defined temperature is reached.
The instrument can be used to evaluate switching behavior during controlled temperature changes.
The adjustable heating and cooling rates support controlled temperature transitions.
This is particularly useful when testing thermostats and temperature dependent switching devices.
Adjustable Heating and Cooling Rates
The Fluke Calibration 9140 allows heating and cooling rates to be adjusted using the front panel.
This function provides flexibility when performing different calibration procedures.
Controlled temperature changes are particularly useful for temperature switch testing.
They also help when evaluating temperature sensors under gradually changing temperature conditions.
The adjustable ramp rate supports repeatable calibration procedures.
RS232 Communication Interface
The Fluke Calibration 9140 features an integrated RS232 communication interface.
This allows the instrument to communicate with a computer.
The interface can be used for remote control and automated calibration applications.
The manufacturer specifies compatibility with Interface-it software.
This provides additional flexibility for professional calibration laboratories.
Compact and Portable Design
The Fluke Calibration 9140 is designed for portable temperature calibration.
The instrument weighs approximately:
2.7 kg
Its external dimensions are:
152 × 86 × 197 mm
The compact construction makes the instrument suitable for industrial maintenance and field calibration.
Its low weight allows the Fluke Calibration 9140 to be transported easily between different measurement locations.
The instrument is also suitable for use on laboratory workbenches where space is limited.
NIST Traceable Calibration
The Fluke Calibration 9140 is supplied with a NIST traceable calibration certificate.
The manufacturer specifies calibration data at the following temperatures:
50 °C, 100 °C, 150 °C, 200 °C, 250 °C, 300 °C and 350 °C.
These calibration points cover the operating range of the instrument.
The calibration documentation provides metrological traceability.
For applications requiring accredited calibration, the available calibration options should be checked separately.
Technical Highlights
| Specification | Fluke Calibration 9140 |
|---|---|
| Manufacturer | Fluke Calibration |
| Model | 9140 |
| Product type | Portable Dry Block Temperature Calibrator |
| Temperature range | +35 °C to +350 °C |
| Display accuracy | ±0.5 °C |
| Accuracy for openings larger than 6.35 mm | ±1 °C |
| Temperature stability at 50 °C | ±0.03 °C |
| Temperature stability at 350 °C | ±0.05 °C |
| Uniformity between similar sized wells | ±0.1 °C |
| Temperature resolution | 0.1 °C |
| Calibration well depth | 124 mm |
| Insert diameter | 31.8 mm |
| Insert configurations | A, B, C or D |
| Heating time to 350 °C | Approximately 12 minutes |
| Cooling time from 350 °C to 100 °C | Approximately 15 minutes |
| Stabilization time | Approximately 7 minutes |
| Adjustable ramp rate | Yes |
| Temperature switch testing | Yes |
| Communication interface | RS232 |
| Software compatibility | Interface-it |
| Power supply | 115 V or 230 V AC, switchable |
| Frequency | 50 / 60 Hz |
| Power consumption | 500 W |
| Dimensions | 152 × 86 × 197 mm |
| Weight | Approximately 2.7 kg |
| NIST traceable calibration certificate | Included |
Fluke Calibration 9140 or Fluke Calibration 9103?
The Fluke Calibration 9140 and Fluke Calibration 9103 belong to the same family of portable dry block temperature calibrators.
However, the instruments cover different temperature ranges.
The Fluke Calibration 9140 operates from +35 °C to +350 °C.
The Fluke Calibration 9103 operates from −25 °C to +140 °C.
The Fluke Calibration 9140 is particularly suitable for applications requiring elevated temperatures.
The Fluke Calibration 9103 is designed for applications requiring temperatures below ambient conditions.
Both instruments provide interchangeable calibration inserts, adjustable temperature ramp rates and RS232 communication.
The appropriate model depends on the required temperature range, sensor dimensions and measurement uncertainty requirements.
Calibration Service by europascal
Regular calibration is essential for maintaining reliable temperature measurements.
europascal provides professional calibration services for temperature measuring instruments and temperature calibration equipment.
The Fluke Calibration 9140 can be calibrated to determine its temperature indication error and relevant performance characteristics.
For applications requiring low measurement uncertainty, an external calibrated reference thermometer can be used.
The overall measurement uncertainty depends on the temperature source, reference thermometer, sensor immersion depth and measurement conditions.
For professional calibration services and metrological traceability, visit the europascal Calibration Service.
europascal also supports customers in selecting suitable temperature calibration equipment, reference thermometers and complete calibration systems.
Why Choose the Fluke Calibration 9140?
The Fluke Calibration 9140 combines excellent temperature stability, fast heating performance and a compact portable design.
Its temperature range from +35 °C to +350 °C covers many important industrial temperature calibration applications.
Temperature stability of ±0.03 °C at 50 °C and ±0.05 °C at 350 °C supports reliable calibration procedures.
The calibrated temperature display provides an accuracy of ±0.5 °C for suitable calibration well diameters.
Interchangeable calibration inserts allow different temperature sensors to be calibrated.
The 124 mm calibration well depth provides suitable immersion conditions for many industrial temperature probes.
Fast heating to 350 °C in approximately 12 minutes helps reduce waiting times during calibration.
Additional features such as RS232 communication, adjustable ramp rates and temperature switch testing provide flexibility for professional calibration applications.
With a weight of only 2.7 kg, the Fluke Calibration 9140 is particularly suitable for portable temperature calibration.
For laboratories and industrial users requiring a compact dry block calibrator for elevated temperatures, the Fluke Calibration 9140 offers an excellent combination of accuracy, portability and efficiency.
europascal supports customers with temperature calibration equipment, reference thermometers and professional calibration services.
Typical Calibration Applications with the Fluke Calibration 9140
The Fluke Calibration 9140 is suitable for calibrating resistance thermometers, thermocouples, industrial temperature sensors and temperature switches.
Typical applications include industrial maintenance, process instrumentation, quality assurance, production facilities, research laboratories and temperature calibration laboratories.
The combination of a wide temperature range, fast heating performance, interchangeable inserts and compact construction makes the Fluke Calibration 9140 a versatile solution for professional temperature calibration.
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