Fast single measurement
In fast mode, measurement time is 30 to 50 ms or 80 ms, depending on the current range.
TH2692 – Insulation Resistance Tester up to 100 GΩ
For reliable electrical quality testing of components, materials and battery cells.
The compact benchtop design combines an adjustable test voltage from 25 to 1,000 V with four current ranges. This enables widely differing insulation values to be measured with one instrument, while automatic or manual range selection supports both changing DUTs and repetitive test sequences.
Limit evaluation
Upper and lower limits can be defined and evaluated separately for resistance or current.
Contact and short check
Four-terminal contact checking and low-voltage short checking detect poor connections and battery-cell micro-shorts.
System integration
RS232C, USB Device, EXT.I/O and an analog output support automated test stations.
Personal project consultation
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Select the appropriate technical configuration or access product documentation directly.
ART. NO.
Description
TH 2692
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Description
TH2692 – Insulation resistance tester, 10 kΩ–100 GΩ, 25–1,000 V test voltage, up to 2.4 mA, fastest test approx. 50 ms
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Isolation tester
TH2692 overview
The TH2692 is a programmable insulation resistance tester covering resistance values from 10 kΩ to 100 GΩ and leakage currents up to 2.4 mA. Its DC test voltage is adjustable from 25 to 1,000 V in 1 V steps. Four current ranges, automatic or manual range selection and three measurement speeds adapt the instrument to component, material and battery-cell testing. Resistance or current can be evaluated against independently defined upper and lower limits. Up to 16 test files store recurring configurations. The compact benchtop instrument features a 5-inch capacitive touchscreen with 800 × 480 resolution and integrates into automated production and ATE systems through digital, serial and analog interfaces.
Key benefits
Wide measurement range
The 10 kΩ to 100 GΩ range covers lower-resistance checks as well as high-resistance insulation measurements.
Variable test voltage
A 25 to 1,000 V range with 1 V setting resolution adapts the test conditions to different DUTs.
Four current ranges
Automatic or manual selection of 2 mA, 200 µA, 20 µA and 2 µA combines convenience with defined workflows.
Stored test conditions
Up to 16 test files shorten changeover between recurring measurement and evaluation configurations.
Current zeroing
The zeroing function compensates current offset in the sensitive 2 µA range and reduces environment-related deviation.
Direct operation
The capacitive touchscreen clearly presents measured value, test voltage, timing, range and evaluation status.
Measurement principle and specifications
The instrument applies the selected DC test voltage to the DUT, measures the resulting current and calculates insulation resistance. Either resistance or current can be selected as the main displayed and evaluated parameter. An automatic delay starts acquisition after the test voltage has stabilised; alternatively, the delay can be adjusted to suit the DUT's charging and settling behaviour.
| Parameter | TH2692 | Notes |
|---|---|---|
| Resistance measurement range | 10 kΩ to 100 GΩ | Display resolution depends on the resistance value |
| Test voltage | 25 to 1,000 V DC | 1 V setting resolution |
| Voltage output accuracy | ±(1% of setting + 1 V) | The same specification applies to the voltage reading |
| Maximum test current | 2.4 mA | In the 2 mA range |
| Current ranges | 2 mA, 200 µA, 20 µA, 2 µA | Automatic or manual selection |
| Resistance accuracy | I > 100 nA: ±2% of reading 10 nA < I ≤ 100 nA: ±5% of reading 1 nA < I ≤ 10 nA: ±25% of reading |
Depends on measured current |
| Measurement speed | Fast: 30 to 50 ms, 80 ms in the 2 µA range Medium: 200 ms Slow: 500 ms |
Excluding screen refresh time |
| Display | 5-inch touchscreen, 800 × 480 pixels | Chinese and English user interface |
| Test files | 16 internal | Rapid changeover between test conditions |
Selecting measurement speed: For currents of 10 nA or below, medium or slow measurement with pass-stop or fail-stop comparison is appropriate. The optimum setting depends on the DUT and its stabilisation behaviour.
Test sequencing and programmable functions
Limit comparison
Upper and lower limits evaluate insulation resistance or leakage current as PASS, UPPER FAIL or LOWER FAIL.
Four comparison modes
Continuous, pass-stop, fail-stop and end-of-test comparison adapt the sequence to the required decision logic.
Timing and delay control
Test duration and measurement delay are configurable, with automatic or manual delay selection.
Four-terminal contact check
Separate high- and low-side checks detect interrupted or poor contact during the test.
Low-voltage short check
The preliminary check supports detection of battery-cell micro-shorts before the high test voltage is applied.
Noise check
The selectable noise check stabilises evaluation when open test terminals or interference cause fluctuating values.
Typical applications
The TH2692 combines insulation and leakage-current measurement with contact, short-circuit and limit checking. It is suitable for characterising individual DUTs and for repeatable production test stations.
Battery cells
Micro-short and insulation checks identify defective cells before further electrical testing.
Electronic components
Capacitors, resistors, diodes, transistors, sensors, switches and relays can be tested for insulation and leakage current.
Material characterisation
The variable voltage and resistance ranges support electrical characterisation of dielectrics, polymers, ceramics, films and other materials.
Semiconductors and solar cells
Leakage-current and I-V-related measurements support characterisation of semiconductors, optoelectronic devices and solar cells.
Production and end-of-line testing
Limit outputs, external triggering and stored test files enable rapid pass/fail decisions in automated lines.
Research and development
Manual range selection, variable test voltage and configurable timing support repeatable test series on changing DUTs.
Interfaces and automation
All listed interfaces are included as standard. RS232C and USB Device transfer measured values and evaluation results to a PC and provide command-based remote control. EXT.I/O connects the instrument directly to PLC, relay or ATE logic.
| Interface | Status | Function |
|---|---|---|
| RS232C | Standard | PC communication, measurement and result transfer, command-based remote control |
| USB Device | Standard | PC communication and remote control of instrument functions |
| 37-pin EXT.I/O | Standard | START/STOP, interlock, selection of test files 1 to 15, PASS/FAIL/ERR signals and BCD measurement output; selectable NPN or PNP input mode |
| Analog output | Standard | Conversion of measured insulation resistance into a 0 to 4 V signal |
| USB Host / USB-A | Standard | Firmware updates and screenshot storage via USB flash drive |
EXT.I/O integration: Inputs can connect to switches, relays or PLC outputs. Digital outputs provide test status, limit evaluation, error status and the measured value as a BCD signal.
Installation and operating conditions
| Parameter | Specification |
|---|---|
| AC input | 90 to 121 V AC at 60 Hz or 198 to 242 V AC at 50 Hz |
| Power consumption | 25 VA |
| Operating temperature | 0 to 40 °C |
| Relative humidity | ≤ 80% RH |
| Warm-up time | at least 20 minutes |
| Dimensions (W × H × D) | 215 × 89 × 154 mm |
| Weight | approx. 1.9 kg |
Protection and safety functions
External interlock
The EXT.I/O interlock blocks testing when the enabled external safety condition is not satisfied.
Two-step start
The selectable dual-action function requires STOP followed by START within one second, reducing unintended activation.
Error output
Contact, short-circuit and output-voltage errors can be reported to the test controller through the ERR output.
High-voltage testing: Test voltages up to 1,000 V require touch-safe fixtures, suitable test leads, protective earthing and an application-specific safety concept.
TH2692 FAQ
What resistance range does the TH2692 measure?
The specified measurement range extends from 10 kΩ to 100 GΩ.
Is the test voltage adjustable?
Yes. The DC test voltage is adjustable from 25 to 1,000 V with 1 V resolution.
How fast is a measurement?
Fast-mode measurement time is 30 to 50 ms, or 80 ms in the sensitive 2 µA range.
How are DUTs evaluated?
Upper and lower limits can be set for resistance or current. Results are output as PASS or an upper- or lower-limit failure.
Is the instrument suitable for battery cells?
Yes. Its low-voltage short check is intended to detect micro-shorts before high-voltage testing.
Can the TH2692 be automated?
Yes. RS232C, USB Device, EXT.I/O and the analog output support PC-, PLC- and ATE-based workflows.
How many test configurations can be stored?
The instrument stores up to 16 test files. Files 1 to 15 can be selected through EXT.I/O.
What is the purpose of contact checking?
It monitors the high and low connections separately and stops the test if contact is poor or interrupted.
Technical consultation and project enquiry
We can help you select the test voltage, measurement ranges, contacting method and interface integration for your laboratory, production or ATE station.
