HT instruments M70 - Manual (Page 9)

M70
EN - 8
4.4.
 :
RESISTANCE MEASUREMENT AND CONTINUITY TEST
CAUTION
Before taking resistance measurements make sure that the circuit under test is
not powered and that eventual condensers are discharged. The measured
value is out of accuracy if an input voltage is present.
Fig. 4: Connection of the instrument’s terminals during  test
1. Turn on the instrument
2. Press the arrow keys to select 
3. Insert the black and red cables in the corresponding input terminals of the instrument
4. If the measuring cables being used
have not been calibrated, first calibrate
them as described in § 4.4.1
Resistance value
5. Position the test probes on the desired
points of the circuit under test (see Fig.
4)
6. GO
Press GO to perform the
measurement
7. Example of display of resistance value. If such value is lower than 2  the instrument
emits an acoustic signal
8. + GO
Press LOCK and GO together to perform the measurement in
continuous mode, the symbol LOCK is displayed. Press GO
another time to stop the continuous mode measurement
9. In lock mode the instrument emits an acoustic signal and the auto power off is
disabled
4.4.1. "ZERO" mode
1. Any addition or replacement of cables, extensions and croco clips nullify the previous
calibration and make necessary a new calibration before performing further
measurements. Therefore the instrument must be calibrated in the same conditions at
which it will operate during measurements