3
Auto Range Digital Multimeter - USB Interface
1. G E N E R A L I N S T R U C T I O N S
This multimeter has been designed according to IEC1010 standards for
electronic measuring instruments with an over-voltage category (CAT II 1000V,
CAT III 600V) and pollution level 2.
To get the best service from this instrument, read carefully this user manual and
respect the detailed safety precautions.
1.1. Precautionary safety measures
Preliminary
• When using this multimeter, the user must observe all normal safety rules
concerning:
- Protection against the dangers of electric current.
- Protection of the multimeter against misuse.
• For your own safety, only use the test probes supplied with the meter provided.
Before use, check the meter and probes are in good condition.
During use
• If the meter is used near noise generating equipment, be aware that the
display may become unstable or indicate large errors.
• Use EXTREME CAUTION when working around bare conductors or bus bars.
• DO NOT operate the meter around explosive gas, vapour, or dust.
• Verify a meters operation by measuring a known voltage and DO NOT use the
meter if it operates abnormally. Protection may be impaired. When in doubt,
have the meter serviced.
• Use the proper terminals, function, and range for your measurements.
• When the range of the value to be measured is unknown beforehand, ALWAYS
set the range dial at the highest position or autoranging mode.
• NEVER exceed the protection limit values indicated in the specifications for
each range of measurement.
• DO NOT touch unused terminals when meter is linked to a circuit.
• Be careful when working with voltages above 60V DC or 30V AC rms.
• When using the probes, keep your fingers behind the finger guards.
• When making connections, connect the common test lead before connecting
the live test lead; when disconnecting, disconnect the live test lead before
disconnecting the common test lead.
• Before changing functions, disconnect the test leads from the circuit under test.
• For all DC functions, including manual or auto range, to avoid the risk of shock
due to possible improper reading, verify the presence of any AC voltages by
first using the AC function. Then select a DC voltage range equal to or greater
than the AC range.
5163440K_Instructions.qxd 18/09/2009 10:31 Page 3
