Iso-Tech IDM 97, Instruction Manual

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3.4 Measuring resistance
1. Plug the red lead into the "V-
è
- " input terminal and the black lead into the "COM" input terminal .
2. Turn the function switch to "
è
"
3. To avoid incorrect measurements, make sure that the circuit to be measured is not live.
4. Apply the probes to the item whose resistance is to be measured. To measure low resistances with the greatest possible
accuracy, before making a measurement short the probes together and make a note of the resistance shown (the resis-
tance of the leads). After making the measurement subtract this resistance from the figure shown on the display.
3.5 Continuity testing with the internal sounder .
1. Plug the red lead into the "V -
è
- " input terminal and the black lead into the "COM" input terminal .
2. Turn the function switch to " ".
3. Apply the probes to the circuit to be tested. The internal sounder will operate if the resistance is less than 50
è
.