Operation Manual

MD 9225 Clamp Meter Series Operation

Note: In DCA measurements, hysteresis of the jaws (after measuring high DC currents)

may introduce non-zero residual readings. Relative Zero

mode should be used each

time to offset the residual readings, if any, for more accurate measurements.

Adjacent current-carrying devices such as transformers, motors and conductor wires will

affect measurement accuracy. Keep the jaws away from them as much as possible to

minimize influence.



Resistance, and Continuity functions

CAUTION

Using Resistance, Continuity or Diode function in a live circuit will produce false results

and may damage the instrument. In many cases the suspected component must be

disconnected from the circuit to obtain an accurate measurement reading

Inputs are made through the test leads terminals. Slide-switch on defaults at . Press

SELECT

button momentarily to select Continuity function which is convenient for

checking wiring connections and operation of switches. A continuous beep tone

indicates a complete wire.

Diode test function

Inputs are made through the test leads terminals. Slide-switch on defaults at .

Press

SELECT

button momentarily 2 times to select Diode test function. Normal forward

voltage drop (forward biased) for a good silicon diode is between 0.400V to 0.900V. A

reading higher than that indicates a leaky diode (defective). A zero reading indicates a

shorted diode (defective). An OL indicates an open diode (defective). Reverse the test