HIOKI · APPLICATION GUIDE
Short answer: Measuring power and temperature on the same timeline helps engineers see how electrical loading relates to heat. The HIOKI LR8100 Series can combine power and temperature modules in one logging system, making it easier to study inverter losses, thermal response and changing operating conditions during energy-conversion development.
- Capture input power, output power and temperatures together.
- Match modules, current sensors and thermal channels to the test.
- Review efficiency and temperature trends over the same operating cycle.
Inverters, motor drives, battery systems and renewable-energy equipment must perform efficiently while managing the heat produced by electrical losses. A power measurement may identify a loss, but temperature data helps show where and when the system responds to it.
Separate instruments can perform these tasks, but their clocks, recording intervals and exported files must be coordinated. An integrated measurement system helps engineers compare electrical and thermal behaviour without manually assembling separate timelines for every test.
Why measure power and temperature together?
Electrical load can change much faster than a component heats or cools. A synchronized record shows the load change, its power consequences and the subsequent temperature response. This is useful for comparing operating points, observing warm-up and identifying thermal trends during repeated cycles.
Choose measurement points that answer the engineering question: DC input and AC output for an inverter, temperature on the component or cooling interface of interest, and ambient conditions when they affect the comparison. Record operating mode and load changes with the measurement data.
| Measurement |
Question it helps answer |
Configuration consideration |
| Input and output power |
How much power enters and leaves the conversion stage? |
Circuit topology, voltage, current sensors and power channels |
| Temperature at several points |
Where does temperature rise and how does it change with load? |
Thermocouple type, placement, channel count and response time |
| Time-aligned trends |
How does thermal response follow a change in electrical load? |
Recording interval, duration, clocks and data export |
Build a combined HIOKI measurement system
The modular HIOKI LR8101 and LR8102 data loggers support configurations that bring multiple measurements into one system. Choose the main unit and modules after defining the number and type of measurement points.
The M7103 Power Measurement Module measures power with compatible current sensors, while the M7100 Voltage/Temperature Module accepts voltage and thermocouple inputs. Confirm voltage limits, current range, wiring, isolation, sampling settings and the complete sensor and lead configuration before testing.
GENNECT Space SF4300 supports acquisition, viewing and analysis of compatible measurement data. HIOKI describes CSV export for further analysis. Confirm the current software version, compatibility and system requirements for the planned setup.
Example: inverter input, output and load temperature
In HIOKI's example, an LR8102 combines an M7103 power module and an M7100 temperature module to observe an inverter-motor arrangement. The team records the inverter's electrical input and output alongside temperatures at load resistors while the load changes.
Compare the electrical traces and temperatures over the same time interval. A higher load can increase output power and heating, while the temperature rise may continue after the electrical change. The measured traces show what happened in the actual configuration; they do not by themselves establish the temperature of every component in the system.
For a defined measurement boundary, inverter efficiency can be expressed as output power ÷ input power × 100%, and power loss as input power minus output power. Use consistent sign conventions and time intervals. Sensor accuracy, switching behaviour, wiring and any auxiliary loads inside the boundary affect the result.
Applications beyond inverter testing
Battery development: compare charge and discharge power with temperatures at selected cells, terminals or cooling interfaces over the test cycle. Select instruments and protection arrangements appropriate to the battery voltage and current.
Renewable energy and power conversion: compare input and output power with temperatures at converters, cooling interfaces and other relevant points under changing operating conditions.
Data centre equipment: correlate electrical load with selected rack or cooling temperatures to investigate thermal response and validate a change in operating conditions.
Plan a measurement that produces useful results
- Define the decision, operating cycle and electrical measurement boundary.
- Map power channels, sensor locations and temperature points before choosing modules.
- Check voltage and current limits, sensor compatibility, isolation and installation safety.
- Select an interval and recording duration that capture the event and the slower thermal response.
- Record the baseline, load changes and ambient conditions; compare trends and export data as needed.
Configuration support in Canada
RCC Electronics can help Canadian engineers review a HIOKI configuration for simultaneous power and temperature measurement. Share the circuit topology, voltage, current, frequency content, number of power and temperature channels, sensor placement and recording duration so the logger, modules, sensors and leads can be selected together.
FAQ: Simultaneous power and temperature measurement
Why do temperature and power need a common timeline?
It makes it easier to compare a load change with the thermal response that follows, including the delay caused by heating and cooling.
Can one system measure both inverter input and output power?
Yes, with a suitable number of power channels, compatible sensors and a configuration matched to the input and output circuits.
Does a temperature rise measure power loss directly?
No. Temperature reflects heat transfer as well as losses. Measure electrical input and output to calculate power loss within a defined boundary, then use temperature trends to study the thermal response.
What determines the number of channels?
The test-point map and selected main unit and modules determine the practical channel configuration. Confirm the latest HIOKI specifications and operating conditions.
Can the data be exported?
HIOKI describes CSV export from GENNECT Space. Verify the software version and the required measurement items for your workflow.
* Based on HIOKI manufacturer-published application information. Confirm current specifications, safety limits, software compatibility and complete configuration before selection.
