Kyoritsu 3131A User Manual download pdf (Page 14)

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Principle of Continuity Testing (Resistance Test)

Resistance value can be obtained by applying a certain current to the

resistance under test and measuring the voltage generated on the both

sides of the resistance under test.

Resistance Value = Voltage/Current

RX = V/I

6-4 Continuous Measurement

A lock down feature is incorporated on the test button. Pressing and

turning it clockwise, lock the test button in the continuous operating

position.

To release the lock turn the test button counterclockwise.

DANGER

Be extremely careful not to get electric shock during insulation resistance

measurement as high voltage is present on the tip of the test probe

continuously.

① Set the range selector switch to the desired position xΩor x 10Ω.

② Short the line probe (red) and the earth clip of the test probe (black) and

press the test button. Adjust the ohm zero adjust to zero the pointer on

the scale.

③ Connect the test probes to the circuit under test and press the test button.

④ Read the scale directly for xΩrange, multiply by 10 for x 10Ωrange.

Fig.6

continuity

EARTH（−）

LINE（＋）

VOLTAGE:V

RESISTANCE

VALUE:RX

CURRENT:I

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 20

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Kyoritsu 3131A User Manual Page 14