User`s guide

EX430-EU-EN v5.5 08/13

OVERVOLTAGE CATEGORY III

This meter meets the IEC 610-1-2001 standard for OVERVOLTAGE CATEGORY III. Cat III meters

are protected against overvoltage transients in fixed installation at the distribution level. Examples

include switches in the fixed installation and some equipment for industrial use with permanent

connection to the fixed installation.

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:

Input Protection Limits

Function Maximum Input

V DC or V AC 1000V DC/750V AC, 200Vrms on 400mV range

mA AC/DC 500mA 250V fast acting fuse

A AC/DC 20A 250V fast acting fuse(30 seconds max every 15

minutes)

Frequency, Resistance, Capacitance,

Duty Cycle, Diode Test, Continuity

250Vrms for 15sec max

Temperature 60V DC/24V AC

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 the power and disconnect the 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.