Hypot III

The Hypot III series of manual Hypot instruments sets the standard for production line safety compliance testing.

These instruments are packed with productivity-enhancing features and proven safety technology to reduce the safety compliance bottleneck on the production line. All models include basic Continuity test capability for compliance with international standards as well as advanced functions like our patented SmartGFI operator safety circuit and PLC I/O. Interconnect the Hypot III with a HYAMP III Ground Bond instrument to form a complete safety compliance test system. Interested in automation and data collection?


Associated Research Hypot III

Model overview

AC Hipot

DC Hipot

Insulation Resistance

Ground Continuity
3705 Yes Yes
3765 Yes Yes Yes
3770 Yes Yes Yes Yes
3780 500 VA* Yes

*Meets 200 mA short circuit requirements

Key features

Available for automated control.

The patented SmartGFI® is a high speed shut down circuit that provides maximum operator protection. If the circuit detects excessive leakage to ground it shuts down the high voltage in less than 1 millisecond. SmartGFI is automatically activated if the DUT is not grounded. The operator does not need to make the decision whether to activate the SmartGFI.

The patented CAL-ALERT® feature automatically alerts the user when the instrument is due for re-calibration. This eliminates the need for manual tracking of calibration dates.

The VERI-CHEK® feature is a menu driven process by which the instrument's failure detectors are proven to be functioning properly, 'verifying' the functionality of the electrical safety tester and connected accessories.

The ability of a circuit to detect the short duration current spikes normally in the range of 10 microseconds which have peak amplitudes in the milliamp range. These high frequency spikes normally appear on the peaks of the output wave prior to catastrophic or destructive arc breakdown which result in complete failure of the insulation.

Other features

  • Comes complete with a test box for products terminated in a line cord
  • Storage of up to 10 setups with 3 steps per setup
  • Built-in security settings
  • No load setup of trip current and output voltage
  • Electronic ramping (up and down)
  • Built-in adjustable continuity test
  • Interconnection to HYAMP® III to form complete test system


Option Details
Voltage 3705/3765/3770: 115/230 VAC ± 10%, user selectable
3780: 115/230 VAC ± 15%, automatically selected
Frequency 50/60 Hz ± 5%
Fuse 3705/3765/3770: 3.15 A, fast acting 250 VAC
3780: 15 Amp, Slow Blow 250 VAC
Mechanical Bench or rack mount with tilt up feet
Dimensions 3705/3765/3770: (W x H x D) 8.46 x 3.5 x 14.57 in. (215 x 89 x 370 mm)
3780: (W x H x D) 16.93 x 5.24 x 13.78 in. (430 x 133 x 350 mm)
Interface RS-232 interface standard for entry-level automation
Weight 3705/3765/3770: 20.96 lbs. (9.53 kg)
3780: 49 lbs. (23 kg)
Memory 10 memories w/3 steps per memory

If you would like to talk to us about our range of Associated Research test and measurement solutions please contact our sales team on +44 (0)1908 282 766 or email us.