Datasheet

In order to provide high accuracy testing for production test, regulation
compliance, and characteristic verification, the withstanding test voltage
(AC 5kV/DC 6kV) of the GPT-9900 Series can be adjusted in 2V steps,
while the current measurement can be done with 1 A resolution andμ
±(1.5% + 30 A) accuracy to enable small leakage current measurementsμ
of the products or the components. In addition, the test voltage of
insulation resistance of the GPT-9900 Series can be adjusted in 50V steps
within the DC output range from 50V to 1kV, carrying a measurement
accuracy of ±(10% of reading +1 count) at full scale (2000M /9.999G )Ω Ω
and ±(15% of reading +1 count) at full scale (50.00G ). This providesΩ
the flexibility for performing Insulation Resistance (IR) measurements
under variable levels of applied voltage. As the majority of safety
With these capabilities, the user is able to perform various safety tests
and verifications with high flexibility, accuracy and confidence.
regulations need an AC source for ground bond testing, the GPT-9900
Series provides 6Vac voltage (open circuit) and 3A~32Aac current for
ground bond test. Furthermore, open circuit detection (via SOURCE H,
SENSE H and SOURCE L terminals) for ground bond test is also
provided to check whether the test apparatus is properly connected
before the start of a test. This is to ensure the ground bond test is done
accurately without any unnoticeable misconnection of the test leads and
the test terminals.
Once the GPT-9900 Series is turned on, the protection functions to
protect operator and DUT are always in operation throughout the testing
period. When the power is turned on, the GPT-9900 Series immediately
goes through the self-check procedures to ensure that all test functions
are performed under normal conditions, as the first protection function
being applied.
The second protection function is activated once the “Start” (output)
button is pressed. At the first moment of start up, the GPT-9900 will
send a detection voltage (~50V) during the initialization period (100ms)
to check whether the DUT has any short circuit due to poor insulation
before the high voltage is applied. This is to prevent high voltage or
current from returning to the DUT during the test time. To protect DUT
from insulation breakdown caused by the rapid increase of test voltage
at power-on and avoid flashover or arcing phenomena that could affect
the test results, the GPT-9900 Series has a Zero Crossing Turn-On feature,
which ensures the output always starts from the zero crossing of a sine
wave. Moreover, the adjustable voltage ramp-up time (0.1s ~ 999.9s)
allows the test voltage to slowly rise to the set test voltage to reduce the
risk of damaging DUT during mandatory production testing.
Furthermore, after the voltage has ramped to the set test voltage, the
GPT-9900 will continue monitoring the voltage and cut off power output
once any irregularity is detected. This provides both the safety tester and
the operator with a high level protection, which allows the test to be
done in a safe and accurate manner.
High Adjustment & Measurement Resolution
Output Voltage Variation in One Test Cycle
Zero-Crossing Operation
Test V
Start V
Initial Time
RAMP
TEST TIME
Discharge Time
Time
(100ms)
C.
HIGH ACCURACY AND HIGH RESOLUTION TESTING PERFORMANCE
SAFETY GUARDING THROUGHOUT THE TESTING PERIOD
D.