TESTO 755-1, Instruction Manual

Page: 4 / 14

4 Intended use
4
determine the status “operating voltage not present” of the part to be
tested via additional measures (e.g, using a suitable voltage tester,
visual inspection of the disconnection point in the electrical network,
etc.) and make sure that the voltage indicated by the voltage tester is
an interference voltage.
• A voltage tester indicating two values for the internal impedance has
passed the test for differentiating between interference and operating
voltage and can display the voltage type directly or indirectly.
4 Intended use
The instrument may only be used under the conditions and for the purpose
for which it was designed:
•
Current measurement, voltage testing in the AC/DC range of
6 to 600 V (testo 755-1) or 6 to 1000 V (testo 755-2), continuity testing /
resistance testing
• Only use the instrument within the specified measuring ranges of the
following overvoltage categories:
- Voltage measurement: CAT IV 600V, CAT III 1000 V
- Current measurement: CAT IV 300V, CAT III 600 V
The instrument must not be used for the following circumstances:
•
In potentially explosive atmospheres: the instrument is not explosion-
proof!
• When there is rain or other precipitation: risk of electric shock!