Ht-instruments HT4012 Manuel d'utilisateur télécharger pdf (Page 37)

HT4012

EN - 12

4.3.4. Resistance measurement

WARNING

Before taking any in circuit resistance measurement, remove power from

the circuit being tested and discharge all the capacitors.

Fig. 7: Use of clamps for resistance measures

1. Select the function “Ω”.

2. Insert the test leads into the jack, the red plug into V/Ω jack, and black plug into COM

jack.

3. Insert the two long ends of test leads to the desired circuit (see Fig. 7); the reading will

be displayed with automatic detection of the appropriate range.

4. Pressing the R-H key you can select manually the measurement ranges the

measurement ranges in cyclic order. Press the R-H key 2 seconds at least to come back

to AUTOMATIC range selection.

5. The “

O.L" symbol means that the measured quantity is higher than the selected

range. Press the R-H key to select a higher range.

6. If the reading is difficult, press the D-H key to hold the obtained value. To exit from this

function press D-H key again.

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Ht-instruments HT4012 Manuel d'utilisateur Page 37