Home / Blog / Telonic Instruments News / Introducing the Microtest 7640/7641 Hi-Pot Safety Testers!

Introducing the Microtest 7640/7641 Hi-Pot Safety Testers!

Posted on: October 8th, 2026 by Kane Brady

The MICROTEST 7640 and 7641 are versatile three-in-one electrical safety testers combining AC flash, DC flash and insulation-resistance testing in a single platform. Both models provide testing up to 5kV AC, 6kV DC and 100GΩ, with programmable test sequences, arc detection, safety interlock protection and comprehensive connectivity. The 7640 offers a straightforward single-channel solution, while the eight-channel 7641 is designed for multi-point testing and expandable automated production systems.

New
MICROTEST 7640 1-Channel 5kV AC / 6kV DC / 100GΩ Hi-Pot Tester
.
1 in stock (can be backordered)

Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)
Read more

New
MICROTEST 7641 8-Channel 5kV AC / 6kV DC / 100GΩ Hi-Pot Tester
.
Available on back-order

Availability: Stock models delivered next working day (UK only) for orders placed before 16:30 (Mon - Fri)
Read more

Key Features and Performance

Three-in-one AC withstand, DC withstand and insulation-resistance testing
AC hipot output from 10V to 5000V, with up to 30mA rated current
DC hipot output from 10V to 6000V, with up to 10mA rated current
Insulation-resistance testing from 200kΩ to 100GΩ
Choice of single-channel 7640 or eight-channel 7641
7641 expandable to as many as 72 channels with compatible 7508A or 7516A scanner boxes
Programmable ramp, dwell and fall times from 0.1 to 99.9 seconds
Adjustable arc detection with OFF and sensitivity levels 1 to 9
True RMS measurement and fixture-leakage compensation
Safety interlock protection
4.3-inch, 480 × 272 colour TFT display
RS-232, Remote, USB Host, USB Device and EXT I/O interfaces
Internal test-program storage and removable USB storage
PC connectivity for remote programming, control and test-data logging

Image of Sdg8a multilevelsequenceplayback telonicuk

Three safety tests in one

Perform AC hi-pot, DC hi-pot and insulation-resistance testing from one platform.

Image of Siglent ssg3000x plus ocxo carousel5 telonicuk

Choose the right channel count

The 7640 provides one test channel, while the 7641 provides eight configurable channels.

Image of Siglent ssg3000x plus usb power meter control carousel4 telonicuk

Expand when required

Compatible 7508A and 7516A scanner boxes can extend a 7641 system to as many as 72 channels.

Detect insulation defects

Adjustable arc sensitivity helps identify transient discharge through weak or damaged insulation.

Controlled voltage profiles

Programmable ramp, dwell and fall timing helps protect the DUT from sudden voltage changes.

Applications

Transformers, inductors, capacitors and filters
Motors, stators, rotors and coil insulation
Wires, cables, insulation materials and high-voltage connectors
High-voltage harnesses and multi-terminal assemblies
Household appliances and power supplies
Automotive power boards and battery flexible PCBs
New-energy vehicle electrical assemblies
Engineering validation and safety-compliance testing
Quality control and automated production-line testing
Multi-point and parallel testing with the 7641

Product Specifications Table

Specification	MICROTEST 7640	MICROTEST 7641
Model configuration
Built-in channels	1	8
Maximum channels with expansion	Single-channel base instrument	Up to 72 with compatible 7508A / 7516A scanner boxes
Test-sequence capacity	Up to 8 steps per group	Up to 16 steps per group
Built-in storage	64 sets	32 sets
AC hi-pot
Output voltage	10V to 5000V	10V to 5000V
Voltage resolution	1V	1V
Voltage accuracy	±(2% of setting + 5V), no load	±(2% of setting + 5V), no load
Output frequency	50 / 60Hz	50 / 60Hz
Rated current, maximum	30mA	30mA
Leakage-current range	0 to 31mA	0 to 31mA
Lower leakage-current resolution	0.001mA	0.001mA
Lower leakage-current accuracy	±(1% of reading + 5µA)	±(1% of reading + 5µA)
DC hi-pot
Output voltage	10V to 6000V	10V to 6000V
Voltage resolution	1V	1V
Voltage accuracy	±(2% of setting + 5V)	±(2% of setting + 5V)
Rated current, maximum	10mA	10mA
Leakage-current range	0 to 11mA	0 to 11mA
Lower leakage-current resolution	0.001mA	0.001mA
Lower leakage-current accuracy	±(1% of reading + 5µA)	±(1% of reading + 5µA)
Insulation resistance
Output voltage	10V to 6000V	10V to 6000V
Voltage resolution	1V	1V
Voltage accuracy	±(2% of setting + 5V)	±(2% of setting + 5V)
Rated current, maximum	1mA	1mA
IR range / upper threshold	200kΩ to 100GΩ	200kΩ to 100GΩ
IR resolution	0.001MΩ	0.001MΩ
Timing and detection
Measuring time	0.1 to 999s; 0 for continuous	0.1 to 999s; 0 for continuous
Measuring-time resolution	0.1s	0.1s
Ramp / dwell / fall time	0.1 to 99.9s	0.1 to 99.9s
Arc detection	OFF or levels 1 to 9; level 1 is most sensitive	OFF or levels 1 to 9; level 1 is most sensitive
General
Remote control	Test and Abort	Test and Abort
Remote output signals	Pass, Fail, HV Output and Testing	Pass, Fail, HV Output and Testing
Safety switch	Rear INTER LOCK must be closed to enable high-voltage output	Rear INTER LOCK must be closed to enable high-voltage output
Interfaces	RS-232, Remote, USB Host, USB Device and EXT I/O	RS-232, Remote, USB Host, USB Device and EXT I/O
Display	4.3-inch TFT LCD, 480 × 272	4.3-inch TFT LCD, 480 × 272
Power supply	100Vac to 240Vac, 50 / 60Hz ±5%	100Vac to 240Vac, 50 / 60Hz ±5%
Power consumption	350VA	350VA
Operating environment	5°C to 40°C; 20% to 80% RH	5°C to 40°C; 20% to 80% RH
Dimensions (W × H × D)	340 × 88 × 369.6mm	340 × 88 × 429.6mm
Weight	12kg	14kg

See Safety Testers sold by Telonic

How to Shop:

Online: Browse our collection directly on our website. https://telonic.co.uk/
Contact Us: For more information, reach out to our sales team at https://telonic.co.uk/contact/