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400 Series

EN - 12

6. OPERATING INSTRUCTIONS

Press (short pressure) the key to activate the display’s backlighting should it

be difficult to read the display.

Press (long pressure) the HELP key to display an indicative scheme of the

connections between the instrument and the system being tested in the function set

Should more help screens be available for the same function, use the  and 

keys to scroll them.

Press the ESC key to exit the on-line help and go back to the selected

measurement.

6.1. AUTO

This function enables performing an automatic sequence of tests, including the main tests

regarding the electric safety of a system, i.e.:

 Measurement of earth resistance through socket-outlet

 Measurement of RCD tripping time

 Measurement of insulation resistance between phase and earth

CAUTION

Testing the RCD’s tripping time causes the RCD’s tripping. Therefore, check

that there are NO users or loads connected downstream of the RCD

being tested which could be damaged by a system downtime.

Disconnect all loads connected downstream of the RCD as they could

produce leakage currents further to those produced by the instrument, thus

invalidating the results of the test

Fig. 4: Instrument connection through shuko cable

Fig. 5: Instrument connection by means of single cables and remote probe

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HT 400 Series Specifications

General