Checking The Dc Voltage; Check Ac Voltage (Trms); Data Hold Function; Phase Test - TESTBOY Profi III LCD Bedienungsanleitung

Operation

Checking the DC voltage

When placing the probes on a DC voltage within the rated voltage range, the voltage is indicated in Volts and "DC" also appea rs on
the display. If a negative voltage is applied at the probe "L2", a " -" (minus) is indicated in front of the value. From a voltage of ap-
prox . 35 V, the hazardous voltage is indicated by a red flashing LED behind the display and a vibrating signal is indicated.
The ELV LED must not be used for measurement.
If the batter ies ar e completely dischar ged, if voltage is applied, a war ning tr iangle is indicated on the display.

Check AC voltage (TRMS)

When placing the probes on an AC voltage within the rated voltage range, the voltage is in dicated in Volts and "AC" also appears
on the display. The mains frequency is also indicated. From a voltage of approx . 35 V, the hazardous voltage is indicated by a
flashing LED behind the display and a vibrating signal is indicated.
The ELV LED must not be used for measurement.
If the batter ies ar e completely dischar ged, if voltage is applied, a war ning tr iangle is indicated on the display.

DATA HOLD Function

By briefly activating the "L.H." button (save data), a test value can be saved on the LC display . The "DATA HOLD" function is indi-
cated on the display by the symbol "D.H." and can be switched off by again briefly activating the button.

Phase test

Pr otective clothing and insulation locations can influence the function!
With the test probe "L2", contact the large hand parts of a conductor. If a phase (Pol >100 V AC) of min. 100 V~ is applied, the dis-
play indicates "<L", the warning triangle and the red flashing LED, as well as vibration.
For determining the phase conductor, the perceptibility of the indication can be impaired, e.g. by insulating fix -
tures to protect against direct contact, in adverse positions, for ex ample on wooden ladders or insulating floor
coverings, of a voltage not earthed or also in adverse lighting conditions.
For safety, check for two-pole deenergization.
The phase can also be determined by checking the ex ternal conductor against the protective earth. The voltage applied should be
indicated at the phase conductor.
During this test, make sure that an additional current flow s across the protective conductor. This is added to
that already ex isting and could trigger the circuit breaker (FI))!
Phase sequence testing (> 200 V AC)
Pr otective clothing and insulation locations can influence the function.
Fully encompass the handles L1 and L2 (refer to the figure on Page 15) below the mechanical mark.
Place the probes L1 and L2 on two ex ternal conductors (phases) and check to see whether the ex ternal conductor voltage of, e. g.
400 V is applied.
An anticlockwise sequence (phase L2 before phase L1) is present if the letter "R" appears on the display.
An anticlockwise sequence (phase L2 before phase L1) is present if the letter "L" appears on the display.
Determination of the phase sequence must always be carried out with a check for transposed probes. Thereby, the phase se-
quence must change.
Please note:
The phase sequence test is possible in earthed AC voltage mains supply from 200 V, 50/60 Hz (phase to phase).
The " third" phase (L3) is simulated with the aid of a sensor in the instrument, by using the hand parts.

One-hand test (e.g. Schuko socket)

Locking both hand parts is possible by the distance piece located on the test line in the lower section on the L1 hand parts. The
distance of the test probes can be adjusted by simply rotati ng. (Schuko / CEE).

Test location lighting

Lighting of the test locations is switched on and off by prolonged activation of the "L.H " button ( save data).
Carefully insert these because, due to the additional load, the batteries become discharged prematurely.
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Testboy Profi III LCD