TESTBOY 20 Plus Bedienungsanleitung Seite 25

Definition of measurement 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 con-
nection, permanently installed equipment in the distributor). Typical short-
circuit current < 50 kA.
Measurement category IV: Measurements at the source of the low volt-
age installation (meters, mains connection, primary overcurrent protec-
tion). Typical short-circuit current >> 50 kA.
To establish the measurement category in a combination
of test lead and measuring instrument, the lowest cate-
gory, either of the test lead or the measuring instrument,
always
Flashlight
Slide the switch on the side of the tester downwards. The high-perfor-
mance LED can illuminate for up to 80 hours! The lifespan of the LED is
over 100,000 hours.
®
Testboy 20 Plus
applies.
Operation
25