◇
18
sampling circuit HI FAIL
The following is a detailed description of the test unit parameters:
The principle structure of the test unit:
The high voltage module is a DA reference, controllable
sine generator, PWM amplifier, 40 ~ 600Hz high voltage transformer boost, output voltage closed-
loop control loop.
1.
DA reference: Ensure that the output voltage amplitude can be programmed.
2.
Controllable sine generator: it can be set to work at 50 or 60Hz when AC output, no longer
limited by line voltage.
3.
PWM power amplifier: high efficiency, good output performance and high sensitivity.
4.
40 ~ 600Hz high voltage transformer boost: for the power supply ripple problem of DC and
Insulation Resistance test, this instrument produces 600Hz AC power, after rectification, a DC
voltage is formed as a power source, to ensure that the DC power supply ripple is much smaller
than the previous regulator type old withstand voltage meter
5.
Output voltage closed-loop control: The load regulation rate is small and the test data is
reliable.
Instrument software
: multi-parameter continuous test, a variety of PC control functions.
ST9010 series are equipped with HANDLER, RS-232C, and USB, enabling the instrument to adapt
to a variety of automated test systems that require high safety and reliability.
Test unit features:
Four test functions—AC withstand voltage test, DC withstand voltage test, insulation
resistance test, open short detection
When connected to the load, the instrument can
continuously perform multi-parameter testing by editing the test file.
Multi-unit scanning channel function (optional controller)
ST9010/A with multi-channel controller ST90101/A can realize
4, 8, 12, 16 programmable
scanning channels. Work with suitable test fixtures, programmable fast connection of
components can be realized, the test speed of multi-parameter measurements can be multiplied.
Node connection check CK
: The scan channel of the scan controller is a two-wire parallel
structure, when the two-point connection is realized through the pin of the DUT, the
instrument performs the test of the connection reliability of the test node by performing the
continuity test.
Test power
Each high voltage module of the ST9010 series is a PWM power amplifier circuit and a 50VA
high voltage transformer, to achieve AC: 5kV/10mA, DC: 6kV/5mA output, the distortion of
the waveform is less than 3%. If the customer need to continuous current output, in order to
ensure the reliability of the instrument, maximum output time is 60 seconds when working
above 60% of rated output current. Within 60% to 40% of the rated output current, please pay
attention to the continuous working time. Continuous operation is guaranteed below 40% of
rated output current.
