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Hipot Safety Tester | 500 VA, AC/DC/IR

€3,478.00 *
Content: 1 piece(s)

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  • GW-GPT-9903A
Available downloads:
GW Instek GW-GPT-9903A:   3-in-1 Hipot Safety Tester - AC Withstanding - DC Withstanding -... more
Product information "Hipot Safety Tester | 500 VA, AC/DC/IR"

GW Instek GW-GPT-9903A:  
3-in-1 Hipot Safety Tester - AC Withstanding - DC Withstanding - Insulation Resistance Testing plus Sweep Function -  500 VA

  • 500 VA AC Test Capacity
  • 240 x 64 Ice Blue Dot matrix LCD
  • Manual / Auto Mode
  • Sweep Function with graphical display
  • Function Key for quick selecting
  • High intensity flash for Caution & Status indication
  • Safety Interlock function
  • Zero Crossing Turn-on Operation
  • Controllable Ramp-up Time
  • True RMS Current Measurement 
  • High resolution: 1 uA for measuring current, 2 V for setting voltage
  • PWM Amplifier to enhance power efficiency and reliable testing 
  • Max. 100 memory block for test condition setting, and each step can be named individually
  • Remote terminal on the front panel for Start, Stop & Control
  • Interface: RS-232C, USB device, Signal I/O, GPIB (optional)
  • 2 Years Warranty

A Solid Foundation for Reliable, Safe and Practical Safety Compliance Testing
The GW Instek GPT-9900 series, with 500VA maximum output capacity, is a new range of safety testers (hi-pot tester/hipot tester). The family of four, including the GPT-9904, GPT-9903A, GPT-9902A and GPT-9901A, compliments the existing GPT-9800 Series, which has 200VA output capacity, rather than 500VA. The GPT-9900 Series serves the market with higher power demands for the safety tests of electronic products and components. The GPT-9000 series supports the major test items among all the needed for the compliance of the safety standards such as IEC, EN, UL, CSA, GB, JIS and other safety regulations.

The GPT-9900 series is built upon a platform of AC 500VA maximum power output. The GPT-9904 is a 4-in-1 model capable of performing AC withstanding, DC withstanding, insulation resistance and ground bond tests, whereas the GPT-9903A is a 3-in-1 model capable of performing AC withstanding, DC withstanding and insulation resistance tests. The GPT-9902A is capable of performing both AC and DC withstanding tests, whereas the GPT-9901A is able to only perform AC withstanding tests.The GPT-9900 series safety testers include all the powerful features and advantages of the GPT-9800 Series. The high-efficiency PWM amplifier is the core of GPT-9900 platform design to impede the influence from the 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-9900 series automatically discharges the DUT after each test to eliminate excessive voltage that remains on the DUT.

Following an easy-to-use design concept, the GPT-9903A 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. Major test functions include AC withstanding (AC 5kV/100mA), DC withstanding (DC 6kV/20mA), insulation resistance (DC 50V ~ 1000V/50GΩ max.) and ground bond (AC 32A max./650mΩ max.) tests, with high power measurement capabilities. Furthermore, the test duration, ramp up time and upper/lower limits of the output voltage are fully-adjustable to accommodate a wide variety of safety tests with accurate measurement results. The “Sweep” function of the GPT-9900 series is able to display the test results point by point all through the testing period to form a trace graph. This graphic display performs the characteristic verification of a DUT through observing the parameter response to the changes of the applied voltage or current or testing time. On the graph a movable marker is available to get the parameter reading on the specific point of user’s interest.

Other significant functions and features of the GPT-9903A include the rear panel output for system applications, the open-circuit detection to ensure proper connections of apparatus for ground bond test, 100 sets of memory to save and recall the panel settings for individual or sequential tests, a remote output on-off terminal in the front panel and a signal I/O port in the rear panel provided as the means for remote start/stop control of the safety tester, and RS-232C, USB and GPIB (optional) interfaces available for PC remote control and test result logging.

Scope of Delivery:

  • Quick Start Guide
  • CD (complete User Manual)
  • Power cord
  • Interlock key
  • Remote terminal male plug
  • Test lead GHT-114 x 1


  • Opt.1 GPIB Card

Optional Accessories:

  • GHT-113:  High Voltage Test Pistol
  • GHT-117:  High Voltage Adapter Box
  • GHT-118:  High Voltage / Ground Bond Adapter Box
  • GHT-205:  High Voltage Test Probe
  • GTL-232:   RS232C Cable, 9-pin Female to 9-pin, null Modem for Computer
  • GTL-247:   USB Cable, A-A type, approx. 1.8m
  • GTL-248:   GPIB Cable, approx. 2m
  • GRA-433:  RACK Adapter Panel (19", 4U)


Founded in 1975, Good Will Instrument Co., Ltd was the first professional manufacturer in Taiwan specializing in electrical test & measurement instruments. GW Instek began as a manufacturer of power supplies and quickly expanded into the development of high precision electronic test and measurement instruments.

After decades of experience in the test and measurement industry, GW Instek has grown to become one of the important manufacturers and developers of test and measurement instruments worldwide. Today GW Instek has more than 300 product items, ranging from oscilloscopes, spectrum analyzers, signal sources, basic test & measurement instruments to video surveillance systems. GW Instek has also seen its present growth internationally. With headquarters located in Taipei, Taiwan, GW Instek has subsidiaries in mainland China, America, Japan, Korea, Malaysia, Europe, and India; its products are sold to more than 80 countries worldwide.

With a strong focus on high quality, economical measurement solutions for the educational and industrial manufacturing markets, Good Will Instrument has developed a solid brand image and reputation for reliability, integrity and innovation. From its inception, GW Instek has dedicated itself to becoming a professional electronic test and measurement designer and manufacturer, resulting in a number of national awards and the trust of customers world-wide; In 1993 Good Will Instrument became ISO 9002 accredited and the following year won the Highest Honor of National Outstanding SMEs (small and medium enterprises) Award from the Taiwanese Ministry of Economic Affairs. In 2000, Good Will Instrument went public on the Taiwan Stock Exchange.

GW Instek has been a byword for quality electronic test & measurement instruments due to its decades of experience in R&D, marketing and manufacturing. GW Instek's reputation has been built upon the philosophy of integrity, quality, and creativity as well as the accumulation of years of experience. Focusing on the improvement of R&D, manufacturing and marketing competitiveness, GW Instek will continue to be one of the most reliable, trusted brands creating the highest value for customers.

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