MD 9231 Industrial TRMS AC/DC Current Clamp Meter
1 SAFETY
This manual contains information and warnings that must be followed for operating the instrument safely and
maintaining the instrument in a safe operating condition. If the instrument is used in a manner not specified
by the manufacturer, the protection provided by the instrument may be impaired.
The meter protection rating, against the users, is double insulation per UL/IEC/EN61010-1 Ed. 3.0,
IEC/EN61010-2-033 Ed. 1.0, CAN/CSA C22.2 No. 61010-1 Ed. 3.0, IEC/EN61010-2-032 Ed. 3.0 &
IEC/EN61010-031 Ed. 1.1:
Measurement Category III 1000V & Category IV 600V AC & DC.
Per IEC61010-1 (2010) OVERVOLTAGE CATEGORY
OVERVOLTAGE CATEGORY ll (CAT II) is for equipment intended to be supplied from the building wiring. It
applies both to plug-connected equipment and to PERMANENTLY CONNECTED EQUIPMENT.
OVERVOLTAGE CATEGORY lll (CAT III) is for equipment intended to form part of a building wiring installation.
Such equipment includes socket outlets, fuse panels, and some MAINS installation control equipment.
OVERVOLTAGE CATEGORY lV (CAT IV) is for equipment installed at or near the origin of the electrical supply
to a building, between the building entrance and the main distribution board. Such equipment may include
electricity tariff meters and primary overcurrent protection devices.
TERMS IN THIS MANUAL
WARNING
identifies conditions and actions that could result in serious injury or even death to the user.
CAUTION
identifies conditions and actions that could cause damage or malfunction in the instrument.
WARNING
To reduce the risk of fire or electric shock, do not expose this product to rain or moisture. The meter is intended
only for indoor use.
To avoid electrical shock hazard, observe the proper safety precautions when working with voltages above 60
VDC or 30 VAC rms. These voltage levels pose a potential shock hazard to the user. Before and after
hazardous voltage measurements, test the voltage function on a known source such as line voltage to
determine proper meter functioning.
Keep your hands/fingers behind the hand/finger barriers (of the meter and the test leads) that indicate the
limits of safe access of the hand-held part during measurement. Inspect test leads, connectors, and probes
for damaged insulation or exposed metal before using the instrument. If any defects are found, replace them
immediately. Only use the test lead provided with the equipment or UL Listed Probe Assembly rated CAT III
1000V or better.
This Clamp-on meter is designed to apply around or remove from uninsulated hazardous live conductors. But
still, individual protective equipment must be used if hazardous live parts in the installation where
measurement is to be carried out could be accessible.
CAUTION
Disconnect the test leads from the test points before changing meter functions.
5
Safety