
16
2. Safety Precautions
The Prüfball SPB-L voltage tester has been approved
by VDE test authorities for application of the VDE
GS-symbol. When used for its intended purpose,
the safety of the operator, as well as that of the
instrument, is assured.
In order to maintain awless technical safety con-
ditions, and to assure safe use, it is imperative that
you read these operating instructions thoroughly
and carefully before placing your instrument
into service, and that you follow all instructions
contained therein.
Observe the following safety precautions:
The voltages indicated on the Prüfball SPB are
rated voltages. The voltage tester may only be
used in systems working within these rated
voltage ranges.
Faultless indication of display values is only
guaranteed between -15° and +45°C.
Hold the instrument by the handgears only, to
avoid covering the display and not touching the
test electrodes.
The maximum on-period is 120 seconds.
Only qualified persons may carry out work with
these device. The user needs to be farmiliar with
the risks for measuring voltage and compliance
with safety regulations and the proper use of the
voltage detector.
Workings may only be performed with appropri-
ate personal protective equipment.
Observe the minimum object distance to other
plant components that are energized or earthed
and use personal protective equipment as speci-
fied by national accident prevention regulations
(in Germany: DGUV 3 or DIN EN 50110-1).
The function of the voltage tester must be
checked briefly before and whenever possible
after the use. Carry out the function test. If the
indication of one or several systems fails in the
course of checking, the instrument must not be
used again.
The red -LED only serves as a indication for
hazardous voltage and not as measurement value.
With non pushed buttons this voltage detector
may not permit to clearly indicate the absence of
operating voltage in case of interference voltage
because of its relatively high internal impedance.
When the indication“voltage present”appears
on a part that is expected to be disconnected of
the installation, it is recommended to repeat the
test with pushed buttons with the SPB 500L or
by an other means with the SPB 1000L, that there
is no operating voltage on the part to be tested.
With determination of phase conductors and
phase sequence the perceptibility of the display
may be impaired, e.g. when using insulating
protective gears, in unfavourable locations, for
example on wooden ladders or insulating floor
coverings, as well as with unfavourable lighting
conditions and in an improperly earthed AC
voltage system.