GDZX ZXFC, Руководство пользователя

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ZXFC MOV SPD TESTER
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IV. Operation Method
1. preparation
1) Turn "HV limit" knob clockwise to the end (maximum) and the "voltage preset" counterclockwise to the end
(minimum). Insert the test lines into the panel "+" and "-" respectively. Connect the external power source to
the back panel corresponding power socket.
2) Turn on the power switch. If the instrument display "000", it means the instrument is working well,
otherwise, it is abnormal. Please contact the sales personnel promptly.
2. Test
1) test of varistor/MOV
Turn "varistor / discharge tube" to Varistor (Top) side, "single / continuous" to single(top)end, connect to the
testing object, Press "HV on/off" key and press "test" button. The screen immediately displays the breakdown
voltage of the measured varistor (U1mA), the unit is "V". After about 2 seconds, automatically displays the
leakage current (I 0.75U1mA), the unit isμA, and the green indicating light in on along with the leakage current
display, lasting about 2 seconds.
2) Gas Discharge tube test
(1) routine methods (recommended)
Select "varistor / discharge tube" and "single / continuous" to lower side, connect to the testing sample after
made the preparation mentioned above.
Press "HV on/off" key and "test” key, the test voltage rises from the voltage preset value at the rate of 100V/s,
when the green indicator lights up, the screen displays the voltage which is the ignition voltage of the tube.
(2) screening method
Turn "varistor / discharge tube" to low position (discharge tube), "single / continuous" to top position (single),
clockwise "voltage preset" knob to the end (maximum). Press "HV on/off" knob to the required value (the
upper limit of the test range). Then adjust the "voltage preset" knob to select the voltage value (the lower limit
of the test range).
Connect the test line into testing tube, press "HV on/off" , If the buzzer sends out a sound warning, the Vsdc
value of the ignition voltage of the measured discharge tube is less than the "voltage preset" value (the lower
limit of the super range). At this point, the high voltage should be shut down and the tested product should be
removed in time. Otherwise, the ignition will be repeated. If the buzzer does not alarm, it means that the value
of the ignition voltage Vsdc of the measured discharge tube is greater than the voltage preset. You can click
"test" to continue the next steps.