Continuity Test; Load Connection / Fi/Rcd Trigger Test, Pe (Protective Earth Test); Backlighting; Frequency Indication - TESTBOY Profi III LCD Bedienungsanleitung

Continuity test

(To switch on, place the test pr obes on one another )
Place the test probes on the line to test, fuse or similar. With a resistance of <10.0 k  " OL" will appear on the display and the
acoustical signal will sound, with a resistance >10.0 – 199.9 k, the resistance value appears on the display, if the resistance is
> 200 k, the overflow indicator "OL" appears on the display.

Load connection / FI/RCD trigger test, PE (protective earth test)

Interference voltages and inductives, as well as capacitive coupling can be reduced during the voltage test by simultaneously press-
ing both buttons, FI/RCD. Thereby, a lower impedance is switched on.
When activating the button, the peak current is less than 0.3 A (Is).
This additional load circuit is protected against overloading and reduces the load current after a few seconds.
This in-built load enables a FI/RCD circuit breaker to trigger.
The FI/RCD (max . 30 mA @ 230 V AC) is tested between the phase and protective earth.
Hold a test probe on a phase-carrying conductor ( refer to the phase test ), the other at the protective earth and press in both
FI/RCD buttons as far as possible.
In the normal case, the FI is not triggered without pressing both buttons!
NOTE
Only carry out the FI/RCD test on fix ed installations and power circuits. In the event of a fault, a test on mova-
ble and devices not permanently wired, ex tension leads, amongst other things, can result in ex cessive current
flow in metallic parts connected to the protective earth.
This test does not replace tests on the FI/RCD protective earth, in accordance with VDE 0100!
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For this, Testboy provides the appropriate instruments.

Backlighting

The display backlighting is permanently present, to protect the battery power it automatically switches off after a few seconds and
on again as soon as a test is carried out.

Frequency indication

During the voltage test, the frequency of the AC voltage applied is recorded and indicated on the display, in comple te Hertz, by the
small figures.

Cleaning

Use a damp cloth and mild household detergent to clean the instrument should it become soiled through daily use. Never use ag-
gressive cleaning agents or solvents to clean the instrument.
To prevent electric shocks, do not allow moisture to ingress the housing.

Maintenance

During operation in accordance with the operating instructions, the instrument does not require special maintenance, with the ex -
ception of the batteries.

Replacing the battery

If the batteries are discharged, the battery symbol appears on the display and the instrument automatically switches off as neces-
sary. Immediately replace the batteries in order to ensure accuracy of the test values.
Before opening the battery compartment, disconnect the test probes from the test circuit!
To replace the batteries, open the battery compartment on the main housing. Use a suitable screwdriver and alternately releas e the
screws. When inserting the batteries, ensure that the polarity is correct. Carefully close a nd lock the battery compartment with the
screws.
With the aid of an LED and without batteries, the instrument indicates an applied voltage of more than the ELV value.
At lower temperatures of less than 5°C, the readiness of the voltage tester can be impaired. Please provide sufficient power supply
by using suitable batteries which are also specified for the appointed temperature range!
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Testboy Profi III LCD
Operation
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