Ht-instruments HT701 Manual de usuario descargar pdf (Pagina 19)

HT701

EN - 18

4.4.9. Insulation resistance measurement

CAUTION

 Check that no voltage is present at the ends of the circuit to be tested

before carrying out an insulation measurement.

 During the whole test, make sure that the applied voltage cannot be

accessed by third parties and adequately arrange the system by

disconnecting everything that must not be included in the test.

Fig. 10: Use of the instrument for Insulation measurement

1. Select the INSULATION position.

2. Press the RANGE key for manually selecting test voltage (see § 4.2.6).

3. If necessary, press the MODE key for selecting the “SMOOTH” mode (see § 4.3.5).

The message “SMOOTH” is shown on the display.

4. If necessary, press the HOLD/LOCK key for selecting the “LOCK” mode (see § 4.2.1).

The symbols “ ” and “LOCK” appear on the display.

5. Insert the red remote probe into input lead “” and the black cable into input lead “

”

(see Fig. 10).

6. Position the leads at the ends of the circuit to be tested, respecting positive and negative

polarity (see Fig. 10). If necessary, use the alligator clips.

7. Press and hold the TEST key (with “LOCK” function deactivated) on the instrument or

on the remote probe to start measuring. The symbols “TEST” and “

”, further to the

indication of test voltage, are shown on the display. Release the TEST key to stop

measuring. The result, expressed in M, is shown on the display

8. The message “> full scale M” indicates that the measured value exceeds the full

scale relevant to the selected test voltage.

9. To save the result, see § 4.2.5

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Ht-instruments HT701 Manual de usuario Pagina 19