AUT500-EU-EN v1.0 5/13
4
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.
METER SAFETY RULES
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
Voltage DC or V AC
Ohms, Continuity
Diode, Capacitance, Type K Temperature
Frequency, % Duty, Pulse-ms, Dwell
RPM
600V AC or DC
mA AC/DC
400mA 250V
20A AC/DC
20A AC or DC*
* 20A measurements for 30 seconds maximum
Notes: Resistance (Ohms) cannot be measured if voltage is present. Resistance can only be
measured on a non-powered circuit
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 batteries.
7.
NEVER
operate the meter unless the back cover and the battery and fuse covers are in place
and fastened securely.
