HT instruments HT4010 - Manual (Page 24)

HT4010
EN - 3
1.2 BEFORE USE
Always keep to the instructions contained in this manual:
CAUTION
Non compliance with the warnings and/or the instructions may damage the
tester and/or its components or injure the operator.
• Before changing the switch’s position, take off the clamp jaw from the tested conductor
or the electrical circuit in order to avoid any accident
• When the clamp is connected to the circuits to be tested, never touch unused terminals
• When testing resistors, do not add voltage. Although there is a protection circuit,
excessive voltage would cause malfunctioning
• Before measuring current, remove the voltage-resistance test leads
• When measuring current, any strong current near or close to the clamp jaw will affect
the accuracy
• When measuring current, always put the tested conductor in the middle of the clamp
jaw in order to obtain a more accurate reading
• If the reading value or the sign indication remains unchanged during the measurement,
check if the HOLD function is active
1.3 AFTER
USE
• Once the measurements are completed, turn the rotary switch to OFF
• If you expect not to use the clamp for a long time, remove the battery