Continuity Check; E) Insulation Test With Auxiliary Supply - VOLTCRAFT ET-100 Bedienungsanleitung

d) Continuity check
Make sure that all circuit parts, circuits, components and any other test objects are currentless
and discharged.
- Switch on the measuring device and select measuring range
- Carry out the measurement as described for resistance measurement. A measured value of less than 35 ohms
is identified as continuity and accompanied by a beep. The continuity check symbol is displayed.
- After measuring, remove the measuring lines from the test object and switch off the measuring device.

e) Insulation test with auxiliary supply

Make sure that all circuit parts, circuits, components and any other test objects are currentless
and discharged. If the measuring device recognises a voltage of ≥30 V/DC or ≥30 V/AC in the
measuring circuit, no insulation test is possible. Always measure the voltage (AC + DC) before
testing the insulation.
During insulation tests, dangerous voltages can be present at the test prods. A lightning symbol
on the display warns of such voltages. The voltage is also present in all connected circuits and
conductors. Do not touch any circuits or components when measuring the insulation.
Only touch within the tangible grip markings on the test prods or the insulated alligator clip.
The insulation test allows measuring the insulation resistance of safety-related
protective measures with an adjustable auxiliary supply. Faulty or insufficient
insulation can be detected. The required insulation resistances can be gathered
from the respective standards.
- Switch on the measuring device and select the "4000 MΩ" measuring range
and the corresponding auxiliary supply.
- Plug the red measuring line into the "V" measuring socket (10) and the black
measuring line into the COM measuring socket (11). You can use the provided
alligator clip to carry out a one-hand measurement.
- The display shows the unit "MΩ".
- Connect the two test prods (red = positive/black = negative) with the test
object. The measuring line with the alligator clip makes handling easier during
measurements.
When measuring, a beep along with a flashing lightning symbol warns of test voltage present in
the measuring lines.
If a voltage of more than 30 V (AC/DC) has been detected, no test is carried out and ">30 V" is
displayed along with the voltage type (AC or DC). This is indicated by a warning sound. Stop meas-
uring immediately and disconnect the measuring circuit, any components and the device from the
power supply.
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