Mastech MS8233A User manual

CAT.II
600 V
AUTO MAX

04
1.SAFETY INFORMATION
This multimeter has been designed according to IEC61010-1
concerning electronic measuring instruments with an
overvoltage category (CAT II) and pollution 2.
Follow all safety and operating instructions to ensure that the
meter is used safely and is kept in good operating condition.
Full compliance with safety standards can be guaranteed only
with test leads supplied. If necessary, they must be replaced
with the type specified in this manual.
1.2Maintenance
• Before opening the case, always disconnect test leads
from all energized circuits.
• For continue protection against fire; replace fuse only
with the specified voltage and current ratings:
250mA/250V(Quick Acting)
10A/250V(Quick Acting)
• Never use the meter unless the back cover is in place
and fastened completely.
• Do not use abrasives or solvents on the meter. To clean
it using a damp cloth and mild detergent only
1.1Safety symbols
Important safety information, refer to the
operating manual.
Dangerous voltage may be present
Anti-garbage
Double insulation (Protection class II).
Fuse must be replaced with rating specified
in the manual.
03
1.3 During use
• Never exceed the protection limit values indicated in
specifications for each range of measurement.
• When the meter is linked to measurement circuit, do not
touch unused terminals.
• Never use the meter to measure voltages that might
exceed 600V above earth ground in category II
installations.
• When the value scale to be measured is unknown
beforehand, set the range selector at the highest
position.
• Before rotating the range selector to change functions,
disconnect test leads from the circuit under test.
• When carrying out measurements on TV or switching
power circuits always remember that there may be high
amplitude voltages pulses at test points, which can
damage the meter.
• Always is careful when working with voltages above 60V
dc or 30V ac rms. Keep fingers behind the probe barriers
when making voltage measurements with test leads.
• Never perform resistance measurements on live circuits