Industry Leaders
PCB Assembly and Wire Processing Equipments

NT 644

High Voltage Wiring Tester

NT 644

■ Easy operation via PC with control software NT Control
■ Comfortable test program editors
■ Extensive display possibilities and tools for fault location in the unit under test
■ Extensive result reporting to file, to printer or via database connection*
■ Up to 1024 test points
■ Insulation test up to 2150 VDC
■ Dielectric strength test up to 1500 VAC
■ Continuity test, short circuit test and component test
■ Remote maintenance
■ Solid 19” housing
■ Expandable by several measurement electronics
■ The demands of the following test standards are complied with:
   IPC/WHMA-A-620, MIL-STD-202G,
   NASA-STD 8739.4A, MIL-HDBK-83575,
   MIL-STD-1344A, MIL-C-45224D

Technical features NT 644

Test points

max. 1024

Low voltage test DC

Test voltage

max. 25 V (optional up to 250 V)

Test current

max. 25 mA (optional up to 2 A)

Threshold continuity test

1 Ohm – 1 kOhm (optional four-wire measurement from 1 mOhm)

Threshold short-circuit test

20 kOhm – 1 MOhm (optional up to 100 MOhm)

Component test

Resistors: 1 Ohm – 1 MOhm (optional up to 100 MOhm)

Capacitors: 10 nF – 20 mF (optional from 10 pF)

Diodes, Zener diodes, LEDs, suppressor diodes

Dielectric strength test AC

Test voltage

100 – 1500 V

Test current

max. 2,1 mAeff, 3 mAp, safety current limited according to EN 50191 (optional max. 4,2 mAeff, 6 mAp)

Dielectric strength test DC

Test voltage

40 – 2150 V

Test current

max. 3 mA, safety current limited according to EN 50191(optional max. 6 mA)

Insulation test DC

Test voltage

40 – 2150 V


500 kOhm – 2 GOhm (optional up to 10 GOhm)

Function test (optional)

The NT 644 can be expanded, so that the test of relays, time relays, contactors, indication lamps, function procedures etc. can be carried out automatically. Therefore stimulus cards and stimulus sources are available beside powerful software tools and editors in NT Control.


Power supply

100 – 240 VAC (50 – 60 Hz)


Extern interface with 3 opto-coupled inputs and 3 potential free outputs (expandable)

Serial interfaces RS232 / USB 2.0


Pin number probe

Dimensions (W x H x D, approx.)

450 mm x 410 mm x 520 mm

Scope of delivery

NT 644, main cable, pin number probe, USB flash drive with NT Control and documentation in PDF format, mating connector and service connector for safety loop


Need more Information?
Call (91) 9595525010 or e-mail

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