Operation Manual
16
1. Safety and operational considerations
1.1 Warning
- This document is only a supplement to the instruction manual.
- Before using the BENNING IT 120 B read the instruction manual carefully, otherwise use of
the BENNING IT 120 B may be dangerous for the operator, for the BENNING IT 120 B or for
equipment under test.
- The symbol on the BENNING IT 120 B means „Read the instruction manual with special
care“. The symbol requires an action!
- IftheBENNINGIT120Bisusedinamannernotspeciedinthisinstructionmanualthe
protection provided by the BENNING IT 120 B may be impaired.
- Do not use the BENNING IT 120 B or accessories if any damage is noticed.
- If a fuse has blown, follow the instructions in the instruction manual to replace it.
- Consider all generally known precautions in order to avoid risk of electric shock while dealing
with hazardous voltages.
- Do not use the BENNING IT 120 B in supply systems with voltages higher than 550 V.
- Service intervention or adjustment procedure is allowed to be carried out only by competent
authorised persons.
- Use only standard or optional test accessories supplied by your distributor.
- Consider that older and some of new optional test accessories compatible with this
BENNING IT 120 B meet only overvoltage category CAT III/ 300 V. It means that maximal
allowed voltage between test terminals and ground is 300 V.
- Disconnect any measuring accessory and power off the BENNING IT 120 B before opening
battery/fuse compartment cover, hazardous voltage inside.
Safety and operational considerations