07/ 2018
BENNING ST 725
22
in Section 6. “Ambient conditions”).
The following symbols are used in these operating instructions and on the BENNING ST 725:
Warning of electrical danger!
Indicates instructions which must be followed to avoid danger to persons.
Important, comply with the documentation!
The symbol indicates that the information provided in the operating instructions must
be complied with in order to avoid risks.
This symbol on the BENNING ST 725 means that the BENNING ST 725 complies
with the EU directives.
This symbol appears on the display to indicate discharged batteries. As soon as the
battery symbol ashes, immediately replace the batteries by new ones. Charged
batteries are also required for measuring in mains operating mode.
(AC) Alternating voltage or current.
Ground (Voltage against ground).
Protection class I
Protection class II
2. Safety note
The instrument is built and tested in accordance with
DIN EN 61557-16 (VDE 0413-16)
DIN EN 61010-1 (VDE 0411-1)
DIN EN 61010-2-030 (VDE 0411-2-030)
DIN EN 61557-1, -2, -4, -10 and -16 (VDE 0413-1, -2, -4, -10 and -16)
and has left the factory in perfectly safe technical state. To maintain this state and ensure safe
operation of the appliance tester, the user must observe the notes and warnings given in these
instructions at all times. Improper handling and non observance of the warnings might involve
severe injuries or danger to life.
WARNING! Be careful when working with bare conductors or main line carrier!
Contact with live conductors will cause an electric shock!
The BENNING ST 725 may be used only in power circuits within the overvoltage
category II with a conductor for 300 V AC max. to earth.
Remember that work on electrical components of all kinds is dangerous. Even
low voltages of 30 V AC and 60 V DC may be dangerous to human life.
The device must be connected to a single-phase mains with 230 V, 50 Hz,
pre-fuse 16 A only. Please make sure not to exceed the maximum breaking
capacity/ lamp load of the test socket of the BENNING ST 725 (see chapters 7.4
and 7.5). Exceeding the values might cause tripping of the fuses and damaging
of the BENNING ST 725. Damages due to overload are excluded from possible
warranty claims.
Do not carry out repeated protective conductor or contact current
measurements with a measuring duration of 2 x 5 minutes at test objects with
high current consumption (16 A). Repeated measurements at maximum load
(16 A) might heat up the inside of the device and thus also its surface.
The protective conductor resistance measurement might be distorted by
impedances connected in parallel of additional operating circuits and by
transient currents.
Measurements of the protective conductor resistance and of the insulating
resistance must be carried out at idle system parts only.
Before starting the appliance tester up, always check it for signs of damage.
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