TESTBOY TV 215N Bedienungsanleitung Seite 40

Definition of overvoltage categories
Measurement category II: Measurements on circuits directly
connected to low voltage networks electrically via plug. Typical
short-circuit current < 10 kA.
Measurement category III: Measurements within the building
installation (stationary consumer devices with non-plug-in
connection, distributor connection, permanently installed
equipment in the distributor). Typical short-circuit current < 50
kA.
Measurement category IV: Measurements at the source of the
low voltage installation (meters, mains connection, primary
overcurrent protection). Typical short-circuit current >>50 kA.
To establish the measurement category in a combination of test
lead and measuring instrument, the lowest category, either of the
test lead or the measuring instrument, always applies.
When using this clamp meter, the user must observe all normal
safety rules concerning:
| Protection against dangers of electric current.
| Protection of the clamp meter against misuse.
For own safety, only use the test probes supplied with the
instrument. Before use, check that they are in good conditions.
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Testboy TV 215N
Operation
39