Datasheet

GMC-I Messtechnik GmbH 17

4.6 Resistance Measurement

For resistance measurement, the

resistance R

to be measured is

switched in parallel to the internal

resistance. That is why with open

input terminals (R

= ) the scale

value  (full scale deflection) is indi-

cated. The polarity of the voltage to

be measured corresponds to the

markings on the connection sock-

ets „A|“ and „“. The resistance

measuring ranges are protected by

a superquick-action melting fuse

FF 1.6A/600V AC in conjunction

with power diodes. The overload

limit of the protective means is 200 A at a maximum (one half wave)

on 600 V

eff

Attention!

Upon cut-out of the protective means:

Check the measuring electric circuit and eliminate the cause

of overload prior to putting the instrument back to serviceable

condition.

On the ranges

 x1,  x 10 and  x 100 the open-circuit voltage at

the sockets is approximately 100 mV. The voltage across the device

under test can be read on the 0 ... 100 graduation, whereby 100 scale

parts correspond to 100 mV.

On the ranges k

 x1 and k x 10 the open-circuit voltage at the

sockets is approximately 1 V. The voltage across the device under test

can be read on the 0 ... 100 graduation, whereby 100 scale parts cor-

respond to 1 V. Because the open-circuit voltage is approximately 100

mV on the ranges

 x1,  x 10 and  x 100, resistance measure-

ments are possible on circuit boards that are also equtpped with

semi-conductors.

Ð Set the range switch to position

 x1...k x 10.

Ð Set switch to position „ON“.

Voltage Drop