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BENNING ST 750 A
1. Safety Instructions
This operating manual contains information which is necessary to ensure proper operation of the
appliance tester. Before commissioning of the appliance tester, thoroughly read and adhere to the
instructions contained in this operating manual!
Please keep this operating manual for later use!
Electricalsafetytestsofelectricalappliancesmustbecarriedoutbyqualiedelectriciansorunder
their responsibility only.
Symbols used in this operating manual and on the device:
Attention! Danger! Please observe documentation!
Warning of dangerous voltage
Note to be observed imperatively
(DC), direct voltage or current
(AC), alternating voltage or current
Earth
O/I
Switch ON/OFF
SD memory card
USB interface
IOIO
RS232 interface
Bluetooth connection
Complying with EU directives
All technical information and standards quoted correspond to the status of the time of
printing and have been determined to the best of knowledge.
For testing, the corresponding provisions, regulations and standards shall be
authoritative.
The device has been built and tested in accordance with the applicable regulations (see chapter 2)
and has left the factory in perfectly safe technical condition. To preserve this condition and to ensure
safe operation of the device, the user must absolutely observe the notes and warnings given in this
operating manual. Improper handling and non-observance of the warnings might involve severe
injuries or danger to life. Do not touch the display with edged objects and do not apply pressure to
the display. Only use the input stylus provided or another blunt pen. It is also possible to operate
thedevicewithyourngers.ThedevicecomplieswithprotectionclassII.Foroperationofthe"test
socket",theprotectiveconductorofthedeviceinputisloopedthrough.Theprotectiveconductoris
intended for measuring to earth. Connect the device only to a single-phase mains with 230 V, 50 Hz
and a pre-fuse of 16 A. For information about the admissible load of the test socket, please refer to
chapter20("TechnicalData").
The BENNING ST 750 A Appliance Tester must be operated with earthed mains only!
For all work carried out with the device, the respective applicable accident prevention
regulations of the industrial professional associations for electrical equipment must be
observed.
Please observe that working on live parts and electrical components of all kinds is dan-
gerous! Even low voltages of 30 V AC and 60 V DC may be dangerous to human life!
Thisdevicemustbeoperatedbyqualiedelectriciansorby"electrotechnicallytrained
persons"underresponsibilityofaqualiedelectrician only.Pleaseobservethecorre-
sponding operating or maintenance manuals of the devices / test samples to be tested /
to be connected. The device must be used in dry rooms only. The device outputs are not
intended for permanent operation, but only for short-time tests!
Before commissioning, always check the device as well as all cables for damages.
Do not open the appliance tester. It does not contain any components which can be
repairedbytheuser.Repairandservicemustbecarriedoutbyqualiedpersonnelonly!
Please use only the original measuring lines provided or corresponding safety mea-
suring accessories!
Attention! Dangerous voltages might occur during insulation testing (RISO).
If it can be assumed that safe operation is no longer possible, switch the device off im-
mediately and secure it against unintended operation. Safe operation can be assumed
to be no longer possible, if
- the device exhibits visible damage,
- the device no longer works,
-
the device has been stored under unfavourable conditions for a longer period of time,
- the device has been exposed to extraordinary stress during transport.
For device protection and for functional testing, the measuring voltages are monitored.
In case of a fault, the fault will be indicated on the display. Measurement will be inter-
rupted.Incaseofafaultcurrentof≥25mA,thedevicewillbeswitchedoffwithin100
to 200 ms. When the thermal fuse is triggered, it can only be reset by switching off the
test device.
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