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Electrical Safety Tester, GPT-9900 Series


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Technical Datasheet:
GPT-9904.   Datasheet
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Technical Documents (1)

Product Overview

The GPT-9904 from GW Instek is a GPT-9900 series A.C. 500VA AC/DC withstanding voltage/insulation resistance/ground bond tester. The high efficiency PWM amplifier is the core of GPT-9902A platform design to impede the influence from voltage fluctuation of input AC source. The output voltage is automatically cut off (within 150μs) upon the detection of an abnormal output voltage or a trip of current limits during test to protect the operator from hazardous injury. The GPT-9902A automatically discharges the DUT after each test to eliminate excessive voltage that remains on the DUT. Following a tidy and easy to use design concept, the tester is equipped with a simple & clear panel layout, a high resolution dot matrix LCD display and colour LED indicators allowing operators to interpret measurement results easily and quickly. The sweep function of GPT-9904 is able to display test results point by point all through the testing period to form a trace graph.
  • 0.050KV to 5.000KV AC withstanding, 0.050KV to 6.000KV DC withstanding
  • 0.001Gohm to 50.00Gohm insulation resistance, 03.00A to 32.00A ac ground bond output current range
  • RS-232C, USB, signal I/O and GPIB (optional) interface, 100 memory block for test condition setting
  • AC 100V/120V/220V/230V ±10%, 50/60Hz power, 330 (W) x 148 (H) x 587mm(D) dimension, 27Kg weight
  • 240x64 ice blue dot matrix LCD, sweep function for DUT characteristic analysis
  • Function key for quick selection, high intensity flash for caution & status indication
  • Safety interlock function, zero crossing turn-on operation, controllable ramp-up time
  • High resolution, 1µA for measuring current, 2V for setting voltage, true RMS current measurement
  • PWM amplifier to enhance the power efficiency and reliable testing
  • Maximum 100 memory block for test condition (step) setting, manual/auto mode


Test & Measurement


GPT-9904 AC/DC withstanding voltage tester, Quick start guide, CD (completed user manual), Power cord, Interlock key, Remote terminal male plug, GHT-114 x 1, GTL-115 x 1.


Never touch the safety tester, lead wires, terminals, probes and other connected equipment when the tester is testing.


The GPT-9000/9900A series is a high voltage instrument that outputs dangerous voltages. GPT-9000/9000A Series User Manual describes precautions and procedures that must be followed to ensure a safe work environment.

Available to manufacturer lead time 20 weeks

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