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.
Safety
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
WARNING
if not avoided, could result in death or serious injury.
This CAUTION symbol indicates a potentially hazardous situation, which
CAUTION
if not avoided, may result damage to the product.
MAX This symbol advises the user that the terminal(s) so marked must not be
connected to a circuit point at which the voltage with respect to earth
600V
ground 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.

SAFETY INSTRUCTIONS

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.
1. 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
2. USE EXTREME CAUTION when working with high voltages.
3. DO NOT measure voltage if the voltage on the "COM" input jack exceeds 600V above earth ground.
4. 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.
5. ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance
or diode tests.
6. ALWAYS turn off power and disconnect test leads before opening the covers to replace the fuse or battery.
7. NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened
securely.
8. If the equipment is used in a manner not specified by the manufacturer, the protection
provided by the equipment may be impaired.
Input Protection Limits
600V AC and DC
500mA DC/AC
10A DC/AC (for 30 seconds max. every 15
minutes
250V DC/AC
250V DC/AC
2
Maximum Input
Model EX330 - Version 4.0 – 05/06