Sperry instruments SMART meter Operating Instructions Manual page 3

WARNING
• Never attempt to make any measurement if any abnormal conditions are noted, such as broken case, cracked
test leads and exposed metal part.
• Do not change the measurement function with test leads connected to the circuit under test.
• Do not install substitute parts or make any modification to the instrument.
• Do not try to replace the batteries if the surface of the instrument is wet.
• Always switch off the instrument before opening the battery compartment cover for battery replacement.
CAUTION
• Select the proper measurement function measurement.
• Do not expose the instrument to the direct sun, high temperature and humidity or dewfall.
• Be sure to power off the instrument after use. When the instrument will not be in use for
a long period, place it in storage after removing the batteries.
• Use only a soft cloth dampened with water or neutral detergent for cleaning the meter.
Do not use abrasives, solvents or harsh chemicals. Allow to dry thoroughly before use.
Measurement Categories (Over-Voltage Categories)
To ensure safe operation of measuring instruments, IEC61010 establishes safety standards for various electrical
environments, specified as CAT I through CAT IV, and called measurement categories. Higher-numbered
categories correspond to electrical environments with greater momentary energy, so a measuring instrument
designed for CAT III environments can endure greater momentary energy than one designed for CAT II.
• CAT I: Secondary electrical circuits connected to an AC electrical outlet through a transformer or similar device.
• CAT II: Primary electrical circuits of equipment connected to an AC electrical outlet by a power cord.
• CAT III: Primary electrical circuits of the equipment connected directly to the distribution panel, and feeders from
the distribution panel to outlets.
• CAT IV: The circuit from the service drop to the service entrance and to the power meter and primary over current
protection device (distribution panel).
Important Information; Refer to manual
Conformité Européene ("European Conformity")
Designates the product as recyclable electronic
SYMBOLS
waste per WEEE Directive
Double Insulated
AC (Alternating Current)
DC (Direct Current)
Earth ground
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Figure 3