KYORITSU 1109S User Manual

Page 19

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Applications:

Measuring currents in DC operated electrical appliances, bias current of

transitors, IC's, etc.

⑴ Insert the red test lead into the + termin~1 and the black test lead

into the −COM terminal.

⑵ Set the range selector switch to the 250mA range position.
⑶ Turn off power to the circuit under test.
⑷ Connect the red test lead in series with the positive (+) side of the

circuit under test and the black test lead with the negative (-) side.

⑸ Turn on power to the circuit under test.
⑹ When the reading is below 25mA, set the range selector switch to

the lower range for more accurate reading and proceed with the

measurement.

6-7. Resistance Measurements

# WARNING
Be sure to turn off power to the circuit under test before making
resistance measurements.

# WARNING
Never apply voltage to the ohm ranges. The fuse could blow or the
instrument get damaged. Especially when a voltage higher than

250V is applied, the fuse may not protect the circuit.

# CAUTION
A maximum voltage of 12V is present on the ×10kΩ range. It may
damage IC's for low voltage equipment.
Before making resistance measurements, carefully check the
withstand voltage of the circuit under test.