5
Auto Range Digital Multimeter - USB Interface
1.2 Maintenance
• DO NOT attempt to adjust or repair the meter by removing the rear case while
voltage is being applied. Please allow a fully qualified technician to investigate
any problems.
• Before opening the meter case, always disconnect test leads from all sources
of electric current.
• Do not use abrasives or solvents on the multimeter; instead use a damp (not
wet) cloth and mild detergent only.
• ALWAYS set the dial to 'OFF' position when meter is not in use.
• If the meter is not going to be used for a long time, take out the battery and do
not store the meter in high temperature or high humidity environment.
1.3 Protection mechanisms
This instrument is fitted with various protection mechanisms:
• Varistor protection for limiting transients of over 1000V at the V
Ω
terminal.
• A PTC (positive temperature coefficient) resistor protects against permanent
overvoltages of up to 1000V during resistance, capacitance, temperature,
continuity and diode test measurements.
5163440K_Instructions.qxd 18/09/2009 10:31 Page 5
