MS8264 Manual Datasheet
Digital Multimeter Manual
|Total Page||15 Pages|
This instrument complies with IEC 1010-1 (61010-1@IEC: 2001), CAT. II 1000V and CAT. III 600V
overvoltage standards. See Specifications.
To get the best service from this instrument, read carefully this user's manual and respect the detailed
International symbols used on the Meter and in this manual are explained in chapter 1.1.3
Precautions safety measures
* 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
* Measurement category II is for measurements performed on circuits directly connected to the low
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.
* 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
* 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.
* To avoid damages to the instrument, do not exceed the maximum limits of the input values shown in the
technical specification tables.
* When the multimeter is linked to measurement circuits, do not touch unused terminals.
* Caution when working with voltages above 60Vdc or 30Vac rms. Such voltages pose a shock hazard.
* 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-ranging, 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.
* Disconnect circuits power and discharge all high-voltage capacitors before testing resistance, continuity,
diodes, or capacitance.
* Never perform resistance or continuity measurements on live circuits.
* Before measuring current, check the meter's fuse and turn off power to the circuit before connecting the
meter to the circuit.
* In TV repair work, or when carrying out measurements on power switching circuits, remember that high
amplitude voltage pulses at the test points can damage the multimeter. Use of a TV filter will attenuate
any such pulses.
* Use the 9V NEDA battery, properly installed in the Meter's battery case, to power the Meter.
* Replace the battery as soon as the battery indicator (
) appears. With a low battery, the Meter
might produce false readings that can lead to electric shock and personal injury.
* Do not measure voltages above 600V in Category III, or 1000V in Category II installations.
* Do not operate the Meter with the case (or part of the case) removed.
Symbols used in this manual and on the instrument:
Caution: refer to the instruction manual.
Incorrect use may result in damage to
the device or its components.
~ AC (Alternating Current)
DC (Direct Current)
Conforms to European Union directives
|Features||Mastech MS8264 User's Manual GENERAL INS TRUCTIONS This instrument complies with IEC 1010-1 (61010-1@IEC: 2001), CAT. I I 1000V and CAT. III 600V overvoltage s tandards. See Specifications. To get th e best service from this instrument, re ad carefully this user's manual and res pect the detailed safety precautions. I nternational symbols used on the Meter and in this manual are explained in cha pter 1.1.3 Precautions safety measures 1.1.1 Preliminary * Measurement categor y III is for measurements performed in the building installation. NOTE: Exampl es are measurements on distribution boa rds, circuit-breakers, wiring, includin g cables, bus-bars, junction boxes, swi tches, socket-outlets in the fixed inst allation, and equipment for industrial use and some other equipment, for examp le, stationary motors with permanent co nnection to the fixed installation. * M easurement category II is for measureme nts performed on circuits directly conn ected to the low voltage installation. NOTE: Examples are measu.|
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