Datasheet

Other significant functions and features are also incorporated with both series such as the output voltage is automatically cut off (within
150 s) upon the detection of an abnormal output voltage or a trip of current limits during test to protect the operator from hazardousμ
injury and automatically discharges a DUT after test to eliminate excessive voltage on a DUT, 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 on 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.
The unique “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.
Following a tidy and easy-to-use design concept, the both series are equipped with a simple & clear panel layout, a high resolution dot
matrix LCD display, and color LED indicators, allowing operators to interpret measurement results easily and quickly. All major test
functions, including AC withstanding (AC 5kV), DC withstanding (DC 6kV), insulation resistance (DC 50V ~ 1000V) and ground bond
(AC 32A max.) tests, are performed under a high-stability voltage or current output with high-resolution measurement results. Further
more, the test duration, ramp up time and upper/lower limits of the tripping current/resistance are fully-adjustable to accommodate a
wide variety of safety tests with accurate measurement results.
The GPT-9900 series is built upon a platform of AC 500VA, and the GPT-9800 series is built upon a platform of AC 200VA maximum
power output. Each series with 4 models, The GPT-9904 and GPT-9804 are a 4-in-1 model capable of performing AC withstanding,
DC withstanding, insulation resistance and ground bond tests. The GPT-9903 and GPT-9803 are a 3-in-1 model capable of performing AC
withstanding, DC withstanding and insulation resistance tests. The GPT-9902A and GPT-9802 are capable of performing both AC and DC
withstanding tests, whereas the GPT-9901A and GPT-9801 are able to perform AC withstanding test. The high-efficiency PWM amplifier is
the core of both series platform design to impede the influence from the voltage fluctuation of input AC source. Each 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.
A Solid Foundation for Reliable, Safe and
Practical Safety Compliance Testing.
UNIQUE SWEEP FUNCTION FOR DUT CHARACTERISTICS ANALYSIS
The GPT-9900 Series has a unique sweep function to show the trace graph
of test results of the device under test. The test readings are recorded
point by point according to the setting of the applied test voltage or
current and the testing duration (ramp-up time + timer) to form a trace
of parameter response. On this sweep graph, users can use a moveable
cursor to locate the point of specific time or specific amount of applied
source (voltage or current) within test period to know the measurement
result of this point. It helps users to verify the changes of measured
parameter (current or resistance) all thorough the test process, instead
of just obtaining one final value at the end.
B.
HIGH EFFICIENCY AND HIGH STABILITY OUTPUT
PWM Amplifier Efficiency
PWM Amplifier
Liner Amplifier
Output Power
Efficiency
Unlike the conventional safety tester design that uses variable voltage
transformer and class AB amplifier to provide testing voltage, the GPT-
9900 Series, carrying a high-efficiency PWM amplifier design, generates
output source up to 98% efficiency. This greatly reduces the amount of
power loss to heat and therefore lowers the temperature within the
cabinet of the GPT-9900 Series. The suppression of temperature rise
during heavy-duty operations of the tester significantly increases its
reliability and service lifetime. In addition, as PWM amplifier is
comparatively more resistant to the fluctuations of input power voltage,
a stable high-voltage output with less than 1% regulation is provided by
the GPT-9900 Series to perform precision tests of the DUT.
A.