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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:
Function
VAC
750V DC/AC
V DC or V AC
1000V DC/AC, 200Vrms on 200mV range
mA DC
200mA 250V fast acting fuse
A DC
20A 250V 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 1000V 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.
netzerotools.com
Input Protection Limits
Maximum Input
4
EX411-EU_ENG
netzerotools.com
V4.0
5/07
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