Safety Instructions - Extech Instruments EX330 User Manual

Introduction
Congratulations on your purchase of the Extech EX330 Meter. The EX330 offers AC/DC Voltage,
AC/DC Current, Resistance, Diode, Continuity, non-contact Voltage Detection, Capacitance,
Frequency, Duty Cycle, and Temperature (Type K) functions. Proper use and care of this meter will
provide many years of reliable service. For copies of this user manual in other languages please visit
the website.
Safety

SAFETY INSTRUCTIONS

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This symbol adjacent to another symbol, terminal or operating device indicates
that the operator must refer to an explanation in the Operating Instructions to
avoid personal injury or damage to the meter.
This WARNING symbol indicates a potentially hazardous situation, which if not
WARNING
avoided, could result in death or serious injury.
This CAUTION symbol indicates a potentially hazardous situation, which if not
CAUTION
avoided, may result damage to the product.
This symbol advises the user that the terminal(s) so marked must not be
MAX
connected to a circuit point at which the voltage with respect to earth ground
600V
exceeds 600V.
This symbol adjacent to one or more terminals identifies them as being associated
with ranges that may, in normal use, be subjected to particularly hazardous
voltages. For maximum safety, the meter and its test leads should not be handled
when these terminals are energized.
This symbol indicates that a device is protected throughout by double insulation or
reinforced insulation.
This meter has been designed for safe use but must be operated with caution. The rules listed
below must be carefully followed for safe operation.
NEVER apply voltage or current to the meter that exceeds the specified maximum:
Function
V DC or V AC
mA AC/DC
A AC/DC
Frequency, Resistance, Capacitance, Duty
Cycle, Diode Test, Continuity
Temperature
USE EXTREME CAUTION when working with high voltages.
DO NOT measure voltage if the voltage on the "COM" input jack exceeds 600V above earth ground.
NEVER connect the meter leads across a voltage source while the function switch is in the current, resistance,
or diode mode. Doing so can damage the meter.
ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or
diode tests.
ALWAYS turn off power and disconnect test leads before opening the covers to replace the fuse or battery.
NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened
securely.
If the equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired.
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Input Protection Limits
Maximum Input
600V AC and DC
500mA DC/AC
10A DC/AC (for 30 seconds max. every 15 minutes
250V DC/AC
250V DC/AC
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