TIF900
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
Resistance value
4. If the measuring cables being used have
not been calibrated, first calibrate them
as described in paragraph 4.4.1
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 30
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
2. Short-circuit the cable ends with each other as shown in Fig. 5 making sure that the
metallic parts of test probes and crocodiles are in good touch