Sanwa HG561H, Instruction Manual, Page: 11 / 16

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Do not apply any voltage to the measuring terminals.
1) What to measure
Resistance: Resistor, circuit resistance, etc.
Continuity check: Wiring connections, Operation of
switches, etc.
When the circuit to be measured is in a hot line condition
(
≧
30 V ac/dc), the voltage and will be indicated on
the display and the beep sounds. Under the condition,
even if the MΩ test button gets pressed, the instrument
will not generate any test voltage. Turn off the circuit to be
measured, and then measure again.
• The LED level meter works synchronizing with the reading on
the display. (* Refer to "How to read the LED level meter".)
• A voltage between 5 Vac and 30 Vac (Ghost voltage etc.) on
the circuit to be measured makes the "AC" on the display
blink. Unstable reading may be shown during the insulation
resistance measurement under the condition.
After the measurement, the instrument holds the last
reading on the display, and starts the automatic discharge.
When a voltage of the circuit to be measured decreases to
30 V or lower, on the display will be turned off. (Refer to
"5-4 Discharge Function".)
* Insulation resistance measurement principle:
Detecting a current flowing through the circuit to be
measured being applied a DC voltage, the insulation
resistance is calculated from "the voltage / the current".
5-4 Discharge Function
Measuring a capacitive circuit to be measured will charge
it with a rated test voltage. This function discharges the
remaining high voltage from the circuit to be measured to
prevent from electric shock.
1. Keep the measurement probe and the alligator clip
connected to the circuit to be measured, and turn off
the MΩ measurement switch after the MΩ measurement
finished.
2. The instrument automatically starts the discharge.
on the display means "still under discharging". When
the discharge finishes or a voltage of the circuit to be
measured gets to 30 V or less, gets turned off.
5-5 Resistance (Ω) Measurement, Continuity Check
WARNING
How to read the LED level meter when the test voltage is
15 V, 25 V, or 50 V.
Reading LED level meter
0.49 MΩ or under
0.50 MΩ
～
0.99 MΩ
1.00 MΩ
～
4.99 MΩ
5.00 MΩ
～
9.99 MΩ
10.0 MΩ
～
19.9 MΩ
20.0 MΩ or over
A ghost voltage makes “AC” blink
and the reading may be unstable.