General Instructions; Precaution Safety Measures; Preliminary; During Use - Mastech MS8265 Operator's Instruction Manual

1. General Instructions

This instrument complies with IEC 1010-1 (61010
-1@IEC: 2001), CAT. II 1000V and CAT. III 600V
over voltage standards. See Specifications.
To get the best service from this instrument, read
carefully this user's manual and respect the
detailed safety precautions.
International symbols used on the Meter and in this
manual are explained in chapter 1.1.3
1.1 Precautions Safety Measures

1.1.1 Preliminary

* Measurement category III is for measurements
performed in the building installation.
NOTE: Examples are measurements on distribution
boards, circuit-breakers, wiring, including cables,
bus-bars, junction boxes, switches, socket-outlets
in the fixed installation, and equipment for industrial
use and some other equipment, for example,
stationary motors with permanent connection to the
fixed installation.
* Measurement category II is for measurements
performed on circuits directly connected to the low
voltage installation.
NOTE: Examples are measurements on household
appliances, portable tools and similar equipment.
* Measurement category I is for measurements
performed on circuits not directly connected to MAINS.
NOTE: Examples are measurements on circuits not
derived from MAINS, and specially protected (internal)
MAINS derived circuits. In the latter case, transient
stresses are variable; for that reason, requires that the
transient withstand capability of the equipment is made
known to the user.
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*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 instrument. Before use, check that they are
in good condition.

1.1.2 During use

*If the meter is used near noise generating equipment,
be aware that display may become unstable or indicate
large errors.
*Do not use the meter or test leads if they look damaged.
*Use the meter only as specified in this manual;
otherwise, the protection provided by the meter may
be impaired.
*Use extreme caution when working around bare
conductors or bus bars.
*Do not operate the meter around explosive gas, vapor,
or dust.
*Verify a Meter's operation by measuring a known
voltage. Do not use the Meter if it operates abnormally.
Protection may be impaired. When in doubt, have the
Meter serviced.
*Uses the proper terminals, function, and range for
your measurements.
*When the range of the value to be measured is
unknown, check that the range initially set on the
multimeter is the highest possible or, wherever
possible, choose the autoranging mode.
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