Testboy Profi III LED, Operating Instructions Manual

Page: 16 / 156

Operation
16 Testboy
®
Profi III LED
Checking the DC voltage
When placing the probes on an AC voltage within the rated voltage range, one of the lower (12 V +~-) LED's and the LED arranged
above it illuminate according to the voltage applied. The lower LED's indicate the polarity at the test probes L2! ( + or - )
If the threshold value of approx . 35 V is ex ceeded, the ELV LED also illuminates and lucid vibration can be felt. This indicates
a hazardous voltage is present!
The ELV LED must not be used for measurement.
Checking the AC voltage
When placing the probes on an AC voltage within the rated voltage range, both of the lower (12 V +~-) LED's and the LED's ar-
ranged above them illuminate according to the voltage applied. The simultaneous illumination of the l ower LED's indicates AC volt-
age (~).
If the threshold value of approx . 35 V is ex ceeded, the ELV LED also illuminates and lucid vibration can be felt. This indicates a
general hazardous voltage!
The ELV LED must not be used for measurement.
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), min. 100 V~ is applied, the
"<L" LED illuminates! Momentarily illumination of the 12 V LEDs has no significance here.
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 fl oor
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 flows 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.
A clockwise sequence (phase at L1 before phase at L2) is present if the "R" LED illuminates.
An anticlockwise sequence (phase at L2 before phase at L1) is present if the "L" LED illuminates.
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 ha nd parts. The dis-
tance of the test probes can be adjusted by simply rotating. (Schuko / CEE).
Test location lighting
The lighting at the test location is switched on and off by momentarily activating the L.H button.
Carefully insert these because, due to the additional load, the batteries become discharged prematurely.
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. For a resistance of 0 - 200 k
 , the green "Rx /  " LED illuminates and an
acoustic signal sounds.