Operation; Voltage Test; Single-Pole Phase Test; Rotation Field Test - Wiha SB 255-15 Manual

When you replace the batteries, the self test starts automatically.

Operation

Voltage test

1. Hold both test tips L1- 14 and L2+ 2 to the object to be tested.
The voltage is displayed by the LEDs and on the LC display 7 .
•
• If the voltage exceeds 50 V AC / 120 V DC an acoustic signal is also
triggered.
• The voltage polarity is indicated as follows:
AC: LED + and -12 V light up
+ DC: LED +12 V light up
- DC: LED -12 V lights up and "-" appears on the LC display
• If there is negative/positive voltage on the test tip L2+, then a -/+ is
displayed on the LC display.
During the voltage test, the LED L or R may light up.
When fixed in place, the test tips L1- and L2+ are the same distance apart
as the contact openings of a socket, i.e. testing can be carried out with one
hand.

Single-pole phase test

Testing of an electric circuit must not rely solely on this single-pole phase
test. Carry out an additional voltage test to achieve a precise result.
It is potentially not possible to obtain a precise measurement if the insulation/
earthing conditions of the user or the tested object are insufficient, for
example if the floor is insulated or surfaces are painted.
1. Hold the test tip L2+ 2 to the object to be tested.
The ELV LED is illuminated. An acoustic signal is actuated if the voltage exceeds
approx. 100 V AC.

Rotation field test

LED L and R can be operated with different wire systems, however, you
can only obtain a precise test result with a three-phase alternating current
four-wire system.
It is potentially not possible to obtain a precise measurement if the insulation/
earthing conditions of the user or the tested object are insufficient, for example
if the floor is insulated or surfaces are painted.
The device detects the incremental phase sequence with reference to use as
the earth.
1. Fully grasp the handles to ensure capacitive coupling to earth.
2. Hold both test tips L1- 14 and L2+ 2 to the object to be tested.
The voltage from phase to phase is displayed by the LEDs:
LED R is illuminated in case of right rotation.
LED L is illuminated in case of left rotation.
3. Now carry out a counter-test with replaced test tips L1- and L2+. The rotation
direction must always change.

Flow/diodes test

1. The object to be tested must have zero voltage.
For this purpose carry out a voltage test (see section on „Voltage test" on page
12).
2. Switch the device on by holding both test tips L1- 14 and L2+ 2 to each other
or pushing the button [
3. Hold both test tips L1- and L2+ to the object to be tested.
In case of flow (up to approx. 500 kΩ) the LED Rx is illuminated and an acoustic
signal is actuated. If no flow is detected, the device switches off automatically
after approx. 30 s.
If the device is switched off and a flow is detected, the device switches
on again automatically.
For diodes, the LED Rx is illuminated and an acoustic signal is actuated when L1- is
connected to the anode and L2+ to the cathode. If the device is connected in reverse
order to the diode, no flow is shown.
] 8 .
EN
12