Instructions

d) Impedance measurement

Make sure that all circuit parts, circuits and components and other objects of measurement are discon-

nected from the voltage and discharged.

Proceed as follows to measure a resistance:

- Switch on the DMM and select the measuring range “Ω”.

- Plug the red measuring line into the Ω measuring jack (7) and the black

measuring line into the COM measuring jack (6).

- Check the measuring lines for continuity by connecting the two measuring

prods. The impedance value must be approximately 0 - 1.5 Ohm (inherent

impedance of the measuring lines).

- Now connect the two measuring prods to the object to be measured. As

long as the object to be measured is not high-impedance or interrupted,

the measured value will be indicated on the display. Wait until the dis-

played value has stabilised. With impedances of >1 MOhm, this may take

a few seconds.

- If “O.L.” (= overow) appears on the display, you have exceeded the

measuring range or the measuring circuit is interrupted.

- Remove the measuring lines from the object to be measured after comple-

tion of the measurement and switch off the DMM.

If you perform a resistance measurement, make sure that the measuring points you touch with the

measuring prods are free of dirt, oil, solderable lacquer or similar. Such circumstances can falsify the

measured result.

e) Acoustic continuity test

Make sure that all circuit parts, circuits and components and

other objects of measurement are disconnected from the

voltage and discharged.

- Turn the DMM on and select the measuring function .

- Plug the red measuring line into the V measuring jack (7) and the black

measuring line into the COM measuring jack (6).

- A continuity value of less than approx. 50 Ohm is identied as continuity;

in this case a beep sounds. The display shows the corresponding resist-

ance up to max. 199.9 Ohm.

- If “OL” (= overow) appears on the display, you have exceeded the meas-

uring range or the measuring circuit is interrupted.

- Remove the measuring lines from the object to be measured after com-

pletion of the measurement and switch off the DMM.