Transmille 8104 is a precise reference multimeter designed for high-accuracy electrical calibration, metrology and demanding laboratory measurement applications. With DC voltage accuracy down to 4 ppm, direct current measurement up to 30 A, resistance measurement up to 1 TΩ using the dedicated electrometer input and comprehensive AC measurement capabilities, the 8104 provides an exceptionally broad measurement platform for professional calibration laboratories.
As the highest-performance model in Transmille’s 8100 Series, the Transmille 8104 combines precision DC and AC measurement with a dedicated low-noise electrometer input, temperature measurement capabilities, front and rear measurement terminals, advanced ratio functions and comprehensive system interfaces.
The instrument measures DC voltage up to ±1025 V, DC current up to ±30 A, AC voltage up to approximately 1025 V, AC current up to 30 A, conventional resistance up to 1 GΩ and high resistance through the electrometer input up to 1 TΩ.
A dedicated electrometer input additionally provides measurement of extremely low DC currents with resolution down to 0.01 pA. This allows the Transmille 8104 to replace a separate electrometer in many precision laboratory applications.
The 8104 also supports RTD/PRT and thermocouple measurements, significantly expanding the instrument beyond conventional electrical multimeter applications.
At europascal, we provide professional solutions for electrical calibration and precision measurement. The Transmille 8104 can be integrated into manual or automated calibration systems and combined with electrical calibrators, precision standards, current shunts and calibration software.
For professional calibration and metrological traceability of precision multimeters and other electrical measuring instruments, use the europascal Calibration Service.
Your Benefits at a Glance
The Transmille 8104 combines reference-level electrical measurement performance with exceptionally broad measurement capabilities.
Key benefits include:
- DC voltage accuracy down to 4 ppm
- DC voltage measurement up to ±1025 V
- Direct DC current measurement up to ±30 A
- DC current accuracy down to 7 ppm
- AC voltage measurement up to approximately 1025 V
- AC voltage measurement bandwidth up to 1 MHz on applicable ranges
- AC current measurement up to 30 A
- Conventional resistance measurement up to 1 GΩ
- Resistance accuracy down to 8 ppm
- Dedicated low-noise electrometer input
- Electrometer resistance measurement up to 1 TΩ
- Electrometer current resolution down to 0.01 pA
- Frequency measurement up to 1 MHz
- PRT and RTD measurement
- ITS-90 and CVD coefficient support
- Thermocouple measurement
- Front and rear measurement terminals
- Advanced ratio measurement functions
- Precision current shunt support
- Advanced mathematical functions
- Full-color display
- USB interface
- RS232 interface
- GPIB interface
- LAN interface
- ProCal software support
- Designed for professional calibration and metrology laboratories
High-Accuracy DC Voltage Measurement
DC voltage is one of the most important measurement functions of the Transmille 8104.
The instrument covers DC voltages from low-level signals up to approximately:
±1025 V DC
Transmille specifies best one-year total DC voltage accuracy down to:
±4 ppm
This performance makes the 8104 suitable for high-accuracy comparison measurements, electrical calibrator verification and precision voltage measurement.
Typical applications include measurement of:
- Precision DC voltage sources
- Multifunction calibrators
- Voltage references
- Electrical standards
- Laboratory power sources
The broad voltage range allows both low-level and high-voltage signals to be measured using one reference multimeter.
DC Current Measurement up to 30 A
The Transmille 8104 provides direct DC current measurement from low currents up to:
±30 A
Transmille specifies best one-year total DC current accuracy down to:
±7 ppm
A major advantage is the ability to measure high current directly without requiring an external current shunt for standard measurements within the instrument’s direct current ranges.
This makes the 8104 particularly useful for calibration of:
- Multifunction calibrators
- Current calibrators
- Precision current sources
- Electrical test equipment
- Laboratory current standards
Direct measurement up to 30 A can simplify the calibration setup and reduce the number of external components required.
Dedicated Electrometer Input
One of the most important differences between the Transmille 8104 and 8109 is the dedicated:
low-noise electrometer input
This additional input extends the measurement capability far beyond that of a conventional precision multimeter.
The electrometer current ranges cover approximately:
10 nA to ±10 µA
with resolution down to:
0.01 pA
and best specified performance around:
±30 ppm
depending on range and operating conditions.
This enables the Transmille 8104 to measure extremely small currents that would normally require a dedicated electrometer.
High Resistance Measurement up to 1 TΩ
The dedicated electrometer input also extends resistance measurement into the teraohm range.
The Transmille 8104 provides conventional resistance measurement up to:
1 GΩ
and electrometer-based high resistance measurement from approximately:
10 MΩ to 1 TΩ
using selectable measurement voltages from:
10 V to 300 V
Transmille specifies best electrometer resistance performance around:
140 ppm
for applicable ranges and conditions.
This makes the 8104 particularly valuable for laboratories calibrating:
- High-value resistance standards
- Insulation measurement equipment
- Resistance sources
- High-resistance decade boxes
- Electrometers
- Electrical calibration equipment
Precision Resistance Measurement
For conventional resistance measurement, the Transmille 8104 covers values from low resistance up to:
1 GΩ
using 2-wire and 4-wire measurement techniques.
Transmille specifies best one-year resistance performance down to:
±8 ppm
for applicable ranges.
The instrument therefore covers both precision low-resistance measurements and high-resistance measurements using one integrated laboratory platform.
For very high resistance, the dedicated electrometer input extends the range further to 1 TΩ.
AC Voltage Measurement
The Transmille 8104 provides advanced AC voltage measurement capabilities.
The overall AC voltage range extends from approximately:
20 mV to 1025 V
with frequency coverage extending to:
1 MHz
on applicable low-voltage ranges.
Transmille specifies best AC voltage performance down to approximately:
±0.015 %
depending on range and frequency.
The extended frequency capability is an important advantage over the 8109 and makes the 8104 particularly suitable for demanding AC calibration workloads.
High Input Impedance
On the lower AC voltage ranges, the Transmille 8104 provides very high input impedance.
This is especially useful when the instrument is combined with precision AC/DC current shunts.
High input impedance reduces loading of the current shunt output and can eliminate the need for additional buffer amplifiers in suitable measurement setups.
Reducing the number of additional components also reduces potential measurement uncertainty contributions.
AC Current up to 30 A
The 8104 provides direct AC current measurement up to:
30 A
with best performance specified around:
±0.03 %
for applicable conditions.
This enables direct calibration and verification of AC current sources across a broad current range.
The combination of direct current measurement and compatibility with precision external current shunts provides additional flexibility for demanding AC current calibration.
Optimized for Precision AC/DC Current Shunts
The Transmille 8104 has been optimized for use with Transmille precision AC/DC current shunts.
Correction parameters for a current shunt can be entered into the instrument.
The multimeter can then simultaneously measure voltage and frequency and calculate the corrected current value based on the shunt’s AC/DC difference.
This provides direct display of the corrected current measurement.
The approach can simplify precision AC current calibration because separate manual calculations are reduced.
Frequency Measurement
The Transmille 8104 also provides precision frequency measurement.
The measurement range extends from:
10 Hz to 1 MHz
with best one-year total accuracy specified at approximately:
5 ppm
according to the current 8100 Series specifications.
Frequency measurement expands the workload of the instrument beyond voltage, current and resistance calibration.
PRT and RTD Measurement
Unlike the 8109, the Transmille 8104 also provides temperature measurement functionality.
The instrument supports PRT and RTD sensors using:
2-wire, 3-wire and 4-wire connections
with support for:
IEC 751
and:
ITS-90 coefficients
This enables precision resistance thermometers to be connected directly to the instrument.
The capability is particularly useful in laboratories performing both electrical and temperature metrology.
Thermocouple Measurement
The Transmille 8104 also supports thermocouple measurement.
More than eight thermocouple types are supported, with measurement performance specified down to approximately:
±0.05 °C
for applicable conditions.
With the appropriate cold junction measurement configuration, thermocouple signals can be converted directly into temperature.
The combination of RTD, PRT and thermocouple measurement considerably broadens the laboratory workload of the 8104.
Front and Rear Measurement Terminals
The Transmille 8104 includes both front and rear measurement terminals as standard.
This provides additional flexibility when integrating the instrument into automated calibration systems or permanent laboratory installations.
Rear terminals are particularly useful in rack-mounted systems because test connections can remain permanently installed.
The front and rear inputs also enable advanced ratio measurements.
Advanced Ratio Measurement
The 8104 provides configurable ratio measurement functionality using its front and rear measurement inputs.
Available configurations include measurements such as:
Front / Rear
Rear / Front
Front − Rear
and:
Rear − Front
This makes the instrument particularly useful for comparison measurements between reference standards and precision sources.
Ratio to Value Function
An especially powerful 8104 function is the ability to compare the rear input against a known reference value.
For example, a certified precision voltage reference can be connected to the rear input.
The instrument measures the reference and determines a correction factor based on the certified value.
This correction factor can then be applied dynamically to measurements at the front terminals.
The technique can reduce the influence of internal multimeter drift and temperature effects during precision transfer measurements.
This functionality is particularly useful when transferring values between standards or comparing a precision calibrator against a reference.
Advanced Mathematical Functions
The Transmille 8104 provides advanced mathematical functions for precision measurement applications.
These functions allow measurement results to be processed directly by the multimeter.
This can reduce external calculations and simplify complex calibration setups.
Typical applications include:
- Ratio measurements
- Difference measurements
- Current shunt corrections
- Precision transfer measurements
- Reference comparisons
Full-Color Display
The 8104 features a modern full-color graphical display.
Measurement values, ranges and instrument settings are clearly presented.
The graphical user interface simplifies configuration of advanced functions compared with traditional precision multimeters that rely on complex combinations of function keys and small displays.
Comprehensive Communication Interfaces
The Transmille 8104 provides multiple communication interfaces as standard.
These include:
USB
RS232
GPIB IEEE488
and:
LAN
This comprehensive connectivity makes the 8104 suitable for both modern and legacy calibration systems.
Existing GPIB-controlled calibration systems can continue to use an established communication architecture, while USB and LAN simplify integration into modern computer-controlled laboratories.
Automated Calibration with ProCal
The Transmille 8104 is supported by Transmille ProCal 6 calibration software.
ProCal provides built-in support for the 8104 and supports automatic measurement uncertainties.
The combination of the 8104 and calibration software allows measurement procedures to be automated.
Automated calibration can help:
- Reduce manual data entry
- Improve measurement consistency
- Reduce transcription errors
- Increase laboratory throughput
- Standardize calibration procedures
This makes the 8104 particularly attractive for laboratories with a high electrical calibration workload.
Verification of Multifunction Calibrators
A major application of the Transmille 8104 is the verification and calibration of multifunction electrical calibrators.
The instrument covers many of the quantities generated by modern calibration systems:
DC voltage
AC voltage
DC current
AC current
resistance
and:
frequency
Its extended measurement ranges and high accuracy enable a large portion of an electrical calibrator’s output workload to be measured with one reference instrument.
Laboratory Reference Measurements
The Transmille 8104 is also suitable for demanding comparison measurements involving electrical reference standards.
Front and rear measurement inputs and ratio functionality provide useful capabilities for transferring values between reference standards and precision sources.
This makes the instrument suitable not only for routine calibration but also for higher-level electrical metrology applications.
8104 Compared with the 8109
The Transmille 8104 is the higher-performance model in the 8100 Series.
The 8104 provides best DC voltage accuracy down to approximately:
4 ppm
compared with approximately 9 ppm for the 8109.
For DC current, the 8104 reaches approximately:
7 ppm
compared with approximately 25 ppm for the 8109.
Resistance performance improves to approximately:
8 ppm
compared with approximately 20 ppm on the 8109.
The 8104 additionally provides:
- Dedicated electrometer input
- Current resolution down to 0.01 pA
- High resistance measurement up to 1 TΩ
- PRT and RTD measurement
- Thermocouple measurement
- Rear panel measurement terminals
- Advanced ratio measurements
- Extended AC voltage bandwidth
The 8104 is therefore the preferred 8100 Series model when maximum measurement performance and the widest possible laboratory workload are required.
Technical Highlights
| Feature | Transmille 8104 |
|---|---|
| Device type | Reference Precision Multimeter |
| Best DC voltage accuracy | ±4 ppm |
| DC voltage | Up to ±1025 V |
| Best DC current accuracy | ±7 ppm |
| DC current | Up to ±30 A |
| Electrometer DC current | 10 nA to ±10 µA ranges |
| Electrometer resolution | Down to 0.01 pA |
| AC voltage | Approx. 20 mV to 1025 V |
| AC voltage bandwidth | Up to 1 MHz on applicable ranges |
| Best AC voltage performance | Approx. ±0.015 % |
| AC current | Up to 30 A |
| Best AC current performance | Approx. ±0.03 % |
| Conventional resistance | Up to 1 GΩ |
| Best resistance performance | Approx. ±8 ppm |
| Electrometer resistance | 10 MΩ to 1 TΩ |
| High resistance test voltage | 10 V to 300 V |
| Frequency | 10 Hz to 1 MHz |
| Frequency accuracy | Approx. 5 ppm |
| RTD/PRT | 2, 3 and 4-wire |
| PRT coefficients | IEC 751 and ITS-90 |
| Thermocouples | More than 8 types |
| Measurement inputs | Front and rear |
| Interfaces | USB, RS232, GPIB and LAN |
| Automation | ProCal 6 support |
| Installation | Benchtop or optional 19-inch rack mount |
Why Choose the Transmille 8104?
The Transmille 8104 combines high-accuracy electrical measurement with measurement functions that would normally require several individual laboratory instruments.
DC voltage accuracy down to 4 ppm and DC current performance down to 7 ppm provide the precision required for demanding electrical calibration applications.
Direct current measurement up to 30 A reduces the need for external shunts in many standard measurements, while AC voltage and AC current functions cover a broad calibration workload.
Conventional resistance measurement up to 1 GΩ is supplemented by a dedicated low-noise electrometer input extending high-resistance measurement to 1 TΩ and low-current measurement to the picoampere level.
PRT, RTD and thermocouple functions further extend the 8104 into temperature measurement.
Front and rear terminals enable advanced ratio and transfer measurements, while USB, RS232, GPIB and LAN interfaces make the instrument easy to integrate into automated laboratory systems.
Compatibility with Transmille ProCal provides an additional route to automated electrical calibration and uncertainty handling.
For calibration laboratories requiring maximum flexibility from a single precision measurement platform, the Transmille 8104 provides a powerful combination of precision multimeter, electrometer, resistance measurement system and temperature measurement functionality.
At europascal, we provide professional solutions for electrical calibration, reference measurement and automated calibration laboratories. We can assist with integrating the Transmille 8104 with suitable calibrators, precision current shunts, standards and calibration software.
For professional calibration and metrological traceability of the Transmille 8104 and other precision electrical measuring instruments, use the europascal Calibration Service.
Discover more calibration equipment from europascal here.
Manufacturer information about the Transmille 8104 is available on the official Transmille 8100 Series product page.
