Hioki 3153 - Startup Inspection

18
_____________________________________________________________________________________________
2.10 Startup Inspection
______________________________________________________________________________________________
2.10 Startup Inspection
To ensure safe testing, check the following before starting operation:
(1) Breaking current (withstand-voltage mode)
1. Prepare a resistor with a resistance smaller than that of the calculation
result from the output voltage and test upper-limit value (breaking current)
that are preset in the withstand-voltage test.
(Output voltage
÷
Upper-limit value (Breaking current) = Resistance)
A high-voltage resistor with a power rating larger than the power
calculated from the output voltage and resistance is recommended.
((Output voltage)
2
÷
Resistance<Power rating)
Example high-voltage resistor:
KOA Corp.'s GS Series High Voltage High Resistance Thick Film
Resistor
2. Set an upper-limit value.
3. Connect the resistor to the H.V. TEST LEAD.
4. Start the test. Confirm that the current is cut off when the preset voltage
is output. (i.e., make sure the unit is in the FAIL state).
(2) Measured resistance (insulation-resistance mode)
1. Calculate the resistance based on the test voltage set for insulation-
resistance testing and the measured current (1 mA), and prepare a resistor
whose resistance is larger than that of the calculation result.
(output-voltage
÷
measured current (1 mA)
≦
resistance value)
2. Specify the test voltage.
3. Connect the resistor that you prepared to the H.V. TEST LEAD.
4. Make sure that the resistance measured matches the resistor that you
prepared.
(3) Analog voltmeter
1. Before turning on the power, make sure the analog voltmeter is at 0 kV.
2. If the voltage reading is not at zero, adjust the value to zero using a
slotted screwdriver.
(4) Interlock
If the Interlock function is set, make sure the Interlock function works
properly before starting operation. (See Section 9.1.4)
(5) Key inspection
1. Turn off the power, and unplug the power cord from the power outlet.
2. For both the START and STOP keys on the front panel of the unit, press
the center of the key, and make sure you feel it click. The click is less
noticeable when the edges of the keys are pressed.
＊
Clicking
When a key is pressed slowly, there is a moment of slight resistance and a
feeling that the key cannot be pressed any further. When the key is
pressed further after this point, a clicking sensation can be felt.
3. If you do not feel a click, the key may be broken.