Testboy TV 225, Operating Instructions Manual

Page: 22 / 70

Operation
22 Testboy
®
TV 225
Definition of the 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 con-
sumer 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 (me-
ters, mains connection, primary overcurrent protection). Typical short-circuit current >> 50 kA
To establish the measurement category in a combination of test lead and measuring in-
strument, the lowest category, of either the test lead or the measuring instrument, always
applies.
Replacing the battery
If the battery symbol is displayed, the batteries are dead and need to be replaced.
To do this, switch off the instrument and remove any test leads.
To open the battery compartment on the back of the instrument, undo the holding screw
using a Phillips screwdriver size 1. Remove the cover and replace the old batteries with
new ones. 3 AAA (Micro) 1.5 V batteries are required.
Batteries must not be disposed of with normal domestic waste. There will be a
collection point near you!
Maintenance
The instrument does not require special maintenance when used as specified in these
operating instructions.
Cleaning
Use a damp cloth and mild household detergent to clean the instrument should it become
soiled through daily use.
Never use aggressive cleaning agents or solvents to clean the instrument.
To prevent electric shocks, do not allow moisture to ingress the housing.