The Fluke Calibration 7103 is a portable Micro-Bath temperature calibrator designed for accurate and reliable calibration of temperature sensors, thermometers and temperature switches. With a temperature range from −30 °C to +125 °C, excellent temperature stability and a compact liquid bath design, the Fluke Calibration 7103 combines the performance of a laboratory calibration bath with the convenience of a portable temperature calibrator.
Unlike conventional dry-block calibrators, the Fluke Calibration 7103 uses a stirred liquid calibration medium to provide stable and uniform temperature conditions around the sensors under test.
The integrated cooling system allows the instrument to reach temperatures as low as −30 °C without requiring an external refrigeration system.
This makes the Fluke Calibration 7103 particularly suitable for temperature calibration applications requiring measurements below ambient temperature.
The instrument provides temperature stability of ±0.03 °C at −25 °C and ±0.05 °C at +125 °C when operated with the specified calibration fluid.
Its excellent temperature uniformity of ±0.02 °C supports accurate temperature comparison calibration.
The compact calibration chamber has a depth of approximately 140 mm and a usable working diameter of 48 mm.
With a weight of approximately 9.8 kg including calibration fluid, the Fluke Calibration 7103 offers excellent portability for laboratory and industrial applications.
Additional features include RS-232 communication, programmable temperature setpoints, adjustable temperature ramp rates and integrated temperature switch testing.
europascal supports customers with professional temperature calibration equipment and calibration services.
For professional calibration and metrological traceability, visit the europascal Calibration Service.
Your Benefits at a Glance
- Portable liquid temperature calibration bath
- Temperature range from −30 °C to +125 °C
- Temperature stability of ±0.03 °C at −25 °C
- Temperature stability of ±0.05 °C at +125 °C
- Temperature uniformity of ±0.02 °C
- Display accuracy of ±0.25 °C
- Temperature resolution of 0.01 °C
- Integrated thermoelectric cooling
- Compressor-free operation
- Compact and portable construction
- Approximately 9.8 kg including calibration fluid
- Calibration chamber depth of approximately 140 mm
- Usable working diameter of 48 mm
- Bath volume of approximately 1.0 liter
- Suitable for different sensor shapes and sizes
- Suitable for short temperature probes
- Suitable for liquid-in-glass thermometers
- Suitable for bimetallic thermometers
- Suitable for Pt100 and RTD calibration
- Suitable for thermocouple calibration
- Integrated temperature switch testing
- Eight programmable temperature setpoints
- Adjustable temperature ramp rates
- RS-232 communication interface
- Overtemperature protection
- Transport lid with spill protection
- Professional calibration support from europascal
Portable Temperature Calibration from −30 °C to +125 °C
The Fluke Calibration 7103 provides a controlled temperature environment over a range from:
−30 °C to +125 °C
This wide temperature range covers many important industrial and laboratory calibration applications.
The instrument is particularly suitable for temperature measurements below ambient conditions.
Its integrated cooling system allows temperatures down to −30 °C without requiring external refrigeration equipment.
The liquid calibration medium provides excellent thermal contact between the reference thermometer and the sensors under test.
This helps reduce measurement errors caused by poor thermal coupling.
The compact construction allows the Fluke Calibration 7103 to be used in laboratories and directly at industrial measurement locations.
Excellent Temperature Stability
Temperature stability is one of the most important characteristics of a calibration bath.
The Fluke Calibration 7103 provides excellent stability over its operating range.
The manufacturer specifies:
±0.03 °C at −25 °C
±0.05 °C at +125 °C
These specifications apply when using Fluke Calibration 5010 oil under the specified operating conditions.
Good temperature stability is particularly important during comparison calibration.
It allows the reference thermometer and the device under test to be measured under nearly constant temperature conditions.
This helps reduce uncertainty caused by temporal temperature fluctuations.
High Temperature Uniformity
The Fluke Calibration 7103 provides excellent temperature uniformity.
The manufacturer specifies:
±0.02 °C
Temperature uniformity describes the temperature differences between different positions within the calibration zone.
Good uniformity is particularly important when calibrating multiple temperature sensors simultaneously.
The stirred liquid calibration medium provides effective thermal contact around the immersed probes.
This allows temperature sensors with different geometries to be calibrated under comparable conditions.
Liquid Bath Technology
Unlike a conventional dry-block calibrator, the Fluke Calibration 7103 uses a liquid calibration medium.
The liquid surrounds the immersed temperature sensors.
This provides several advantages.
The calibration medium adapts to different sensor diameters and shapes.
It also reduces problems caused by poor contact between a probe and a calibration insert.
The liquid bath design is particularly useful for short temperature probes, glass thermometers and mechanical thermometers.
The Fluke Calibration 7103 therefore offers greater flexibility for certain applications than conventional dry-block calibrators.
Integrated Thermoelectric Cooling
One of the main advantages of the Fluke Calibration 7103 is its integrated cooling system.
The instrument uses thermoelectric cooling technology.
Unlike conventional refrigeration systems, it does not require a compressor.
This reduces the number of moving components and contributes to a compact design.
The cooling system allows the calibration bath to reach temperatures down to −30 °C.
This makes the Fluke Calibration 7103 particularly suitable for calibration applications requiring temperatures significantly below ambient conditions.
Compact Calibration Chamber
The Fluke Calibration 7103 features a compact liquid calibration chamber.
Chamber diameter: 64 mm
Usable working diameter: 48 mm
Chamber depth: approximately 140 mm
The chamber provides sufficient space for many common temperature sensors.
The usable working diameter allows different sensor configurations to be accommodated.
For high-accuracy calibration, the sensors should be positioned correctly and immersed sufficiently.
The actual measurement uncertainty depends on sensor geometry and temperature distribution within the bath.
Portable Design
The Fluke Calibration 7103 combines precision temperature calibration with portability.
The instrument weighs approximately:
9.8 kg including calibration fluid
Its external dimensions are:
230 × 340 × 260 mm
The compact design makes the instrument suitable for portable calibration applications.
The Fluke Calibration 7103 can be transported between different measurement locations without requiring a large transport system.
A specially designed transport lid helps prevent fluid leakage.
The instrument can therefore be transported with calibration fluid inside when the manufacturer’s transport instructions are followed.
Calibration of Different Temperature Sensors
The Fluke Calibration 7103 is suitable for calibrating many different temperature measuring instruments.
Typical examples include:
- Pt100 resistance thermometers
- Industrial RTD sensors
- Precision platinum resistance thermometers
- Thermocouples
- Liquid-in-glass thermometers
- Bimetallic thermometers
- Temperature switches
- Industrial temperature probes
- Laboratory temperature sensors
The liquid calibration medium provides flexibility when working with different probe geometries.
This is particularly useful for sensors that cannot be inserted into conventional dry-block calibration inserts.
Calibration of Pt100 and RTD Sensors
The Fluke Calibration 7103 is particularly suitable for Pt100 and RTD calibration.
A calibrated reference thermometer and the resistance thermometer under test are immersed in the calibration bath.
After the temperature has stabilized, the reference temperature and the indication of the device under test are recorded.
The indication error is calculated as:
ΔT = T_DUT − T_REF
Where:
- ΔT = Temperature indication error
- T_DUT = Temperature indicated by the device under test
- T_REF = Reference temperature
The resulting measurement values can be used to evaluate the performance of the temperature sensor.
Calibration of Thermocouples
The Fluke Calibration 7103 can also be used for thermocouple calibration.
The thermocouple measuring junction is immersed in the liquid calibration bath.
A suitable reference thermometer measures the actual bath temperature.
The thermoelectric voltage of the thermocouple is measured using a compatible instrument.
The measured voltage can then be compared with the expected thermoelectric voltage for the corresponding thermocouple type.
The measurement uncertainty must consider the reference temperature, thermocouple measurement system and reference junction compensation.
Calibration of Liquid-in-Glass Thermometers
The Fluke Calibration 7103 is particularly useful for calibrating liquid-in-glass thermometers.
These thermometers often have geometries that are difficult to accommodate in dry-block calibrators.
The liquid bath provides a suitable temperature environment around the thermometer bulb.
The indicated temperature can be compared with a calibrated reference thermometer.
This makes the Fluke Calibration 7103 useful for laboratory glass thermometer calibration.
Calibration of Bimetallic Thermometers
Bimetallic thermometers are commonly used in industrial temperature measurement.
Their sensing elements may have relatively large diameters or unusual shapes.
The Fluke Calibration 7103 provides a liquid calibration environment that can accommodate many of these sensors.
The thermometer can be immersed in the bath and compared with a calibrated reference thermometer.
This allows the indication error to be determined at different temperature points.
Integrated Temperature Switch Testing
The Fluke Calibration 7103 includes connections for temperature switch testing.
Temperature switches change their electrical contact state when a defined temperature is reached.
The instrument allows the switching behavior to be evaluated during controlled temperature changes.
This is particularly useful for testing thermostats and temperature-dependent switching devices.
The adjustable temperature ramp rate supports controlled heating and cooling during switch testing.
Eight Programmable Temperature Setpoints
The Fluke Calibration 7103 provides memory for eight temperature setpoints.
This allows frequently used calibration temperatures to be stored.
The operator can select the required temperature without entering the value again.
This feature is particularly useful for repeated calibration procedures.
It simplifies operation and reduces setup time.
Adjustable Temperature Ramp Rate
The Fluke Calibration 7103 provides an adjustable temperature ramp rate.
This allows the temperature to be changed at a controlled rate.
Controlled temperature changes are particularly useful for temperature switch testing.
They can also support calibration procedures requiring gradual temperature transitions.
RS-232 Communication Interface
The Fluke Calibration 7103 features an RS-232 interface.
This allows the instrument to communicate with a computer.
The interface can be used for remote control and automated calibration applications.
The instrument can be used with compatible Fluke Calibration software solutions, including MET/TEMP II.
This provides additional flexibility for professional calibration laboratories.
Overtemperature Protection
The Fluke Calibration 7103 includes an overtemperature safety cutout.
This function helps protect the instrument against excessive temperatures.
The maximum permissible operating temperature also depends on the selected calibration fluid.
The temperature limits of the fluid must always be considered.
The instrument should not be operated outside the permitted operating conditions of the calibration medium.
Heating and Cooling Performance
The Fluke Calibration 7103 provides efficient heating and cooling within its operating range.
The manufacturer specifies:
Heating from 25 °C to 100 °C: approximately 35 minutes
Cooling from 25 °C to −25 °C: approximately 45 minutes
These values provide an indication of the instrument’s temperature adjustment performance.
The actual heating and cooling times depend on the calibration fluid, ambient conditions and operating configuration.
Suitable Calibration Fluids
The Fluke Calibration 7103 requires a suitable liquid calibration medium.
Fluke Calibration specifies performance values using Fluke Calibration 5010 oil.
The selected fluid must provide suitable thermal properties and remain stable over the required temperature range.
Important considerations include:
- Operating temperature range
- Viscosity
- Thermal stability
- Flash point
- Boiling point
- Chemical compatibility
- Safety requirements
The correct fluid selection is essential for reliable calibration results.
Temperature Comparison Calibration
The Fluke Calibration 7103 is designed for temperature comparison calibration.
A calibrated reference thermometer and the device under test are placed in the same liquid calibration bath.
After thermal equilibrium has been reached, the reference temperature and the indication of the device under test are recorded.
The difference between both values determines the indication error.
For high-accuracy calibration, the measurement uncertainty must include relevant contributions from the reference thermometer, temperature stability, temperature uniformity and measurement conditions.
Use with External Reference Thermometers
The Fluke Calibration 7103 can be used with an external reference thermometer.
This is particularly useful when low measurement uncertainty is required.
The internal temperature controller regulates the bath temperature.
The external reference thermometer measures the actual temperature of the calibration medium.
The reference temperature is then used to evaluate the indication error of the device under test.
Suitable reference thermometers include calibrated platinum resistance thermometers connected to precision thermometer readouts.
Technical Highlights
| Feature | Fluke Calibration 7103 |
|---|---|
| Product type | Portable Micro-Bath Temperature Calibrator |
| Manufacturer | Fluke Calibration |
| Temperature range | −30 °C to +125 °C |
| Display accuracy | ±0.25 °C |
| Stability at −25 °C | ±0.03 °C |
| Stability at +125 °C | ±0.05 °C |
| Temperature uniformity | ±0.02 °C |
| Temperature resolution | 0.01 °C |
| Calibration chamber diameter | 64 mm |
| Usable working diameter | 48 mm |
| Calibration chamber depth | 140 mm |
| Bath volume | 1.0 L |
| Weight with fluid | 9.8 kg |
| Dimensions | 230 × 340 × 260 mm |
| Operating ambient temperature | +5 °C to +45 °C |
| Heating time, 25 °C to 100 °C | 35 minutes |
| Cooling time, 25 °C to −25 °C | 45 minutes |
| Power supply | 94 to 234 V AC |
| Frequency | 50 / 60 Hz |
| Power consumption | 400 W |
| Communication interface | RS-232 |
| Cooling system | Thermoelectric cooling |
| Temperature switch testing | Yes |
| Programmable setpoints | 8 |
| Adjustable ramp rate | Yes |
| Overtemperature protection | Yes |
| NIST-traceable calibration | Included |
Fluke Calibration 7103 vs. 7102 vs. 6102
The Fluke Calibration 7103, 7102 and 6102 belong to the same portable Micro-Bath series.
However, the instruments cover different temperature ranges.
| Feature | Fluke Calibration 7103 | Fluke Calibration 7102 | Fluke Calibration 6102 |
|---|---|---|---|
| Temperature range | −30 °C to +125 °C | −5 °C to +125 °C | +35 °C to +200 °C |
| Display accuracy | ±0.25 °C | ±0.25 °C | ±0.25 °C |
| Temperature uniformity | ±0.02 °C | ±0.02 °C | ±0.02 °C |
| Bath volume | 1.0 L | 0.75 L | 0.75 L |
| Weight with fluid | 9.8 kg | 6.8 kg | 4.5 kg |
| RS-232 interface | Yes | Yes | Yes |
| Main advantage | Extended low-temperature range | Cooling below ambient | Higher temperatures |
The Fluke Calibration 7103 is particularly suitable for applications requiring temperatures down to −30 °C.
The Fluke Calibration 7102 is designed for applications requiring temperatures slightly below 0 °C.
The Fluke Calibration 6102 covers temperatures up to +200 °C.
Typical Applications
The Fluke Calibration 7103 is suitable for:
- Temperature calibration laboratories
- Industrial temperature calibration
- Low-temperature calibration
- Pt100 calibration
- RTD calibration
- Thermocouple calibration
- Temperature switch testing
- Liquid-in-glass thermometer calibration
- Bimetallic thermometer calibration
- Temperature comparison calibration
- Portable temperature calibration
- On-site temperature calibration
- Laboratory temperature measurements
- Quality assurance
- Maintenance departments
- Temperature metrology
Calibration by europascal
Regular calibration is essential for maintaining reliable temperature calibration results.
europascal provides professional calibration services for temperature measuring instruments and temperature calibration equipment.
The Fluke Calibration 7103 can be calibrated to determine its temperature indication error and relevant performance characteristics.
For high-accuracy applications, the instrument can be used with a calibrated external reference thermometer.
The overall measurement uncertainty depends on the calibration bath, reference thermometer, measurement conditions and calibration procedure.
For professional calibration and metrological traceability, visit the europascal Calibration Service.
europascal also supports customers in selecting suitable temperature calibration baths, reference thermometers and complete calibration systems.
Why Choose the Fluke Calibration 7103?
The Fluke Calibration 7103 combines the performance of a precision liquid calibration bath with the convenience of a compact portable instrument.
Its temperature range from −30 °C to +125 °C covers many important industrial and laboratory calibration applications.
The integrated thermoelectric cooling system allows temperatures significantly below ambient without requiring a conventional refrigeration compressor.
The instrument provides excellent temperature stability and uniformity.
Its liquid bath design allows temperature sensors with different geometries to be calibrated without requiring precisely matched dry-block inserts.
The compact calibration chamber is particularly suitable for short temperature probes, glass thermometers and bimetallic thermometers.
With a weight of approximately 9.8 kg including fluid, the Fluke Calibration 7103 remains portable.
Additional features such as RS-232 communication, temperature switch testing, programmable setpoints and overtemperature protection provide flexibility for professional calibration applications.
For laboratories and industrial users requiring a portable liquid temperature calibration bath with an extended low-temperature range, the Fluke Calibration 7103 offers an excellent combination of precision, portability and versatility.
europascal supports customers with temperature calibration equipment, reference thermometers and professional calibration services.
