EX410A-en-GB_V6.0 6/16
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OVERVOLTAGE CATEGORY III
This meter meets the IEC 61010-1 (2010) 3
rd
edition 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
600V DC/AC, 200Vrms on 200mV range
mA DC
200mA 600V fast acting fuse
A DC
10A 600V fast acting fuse (30 seconds max every 15 minutes)
Ohms, Continuity
250Vrms for 15sec max
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 cover is in place and fastened
securely.
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