METREL MD 9880
Safety
6
3. Overvoltage category III
Equipment with CAT Ill can be used as part of fixed installations. It must contain its
own overvoltage protection.
NOTE:
Examples include switches in the fixed installation and some equipment for industrial
use with permanent connection to the fixed installation.
4. Overvoltage category IV
Equipment with CAT IV is used at installation connection to the network.
NOTE
:
Examples include electricity meters and primary over-current protection equipment.
Safety instructions
The meter has been designed to be used safely, but must always be operated with
caution. Rules for safe operation are the following.
DO NOT use with voltage or current exceeding the specified maximum.
Input Protection Limits
Function
Maximum Input
Voltage DC or AC
600 V
DCRMS
/ V
ACRMS
Frequency, Resistance, Capacitance
Duty Cycle, Diode test, Continuity
Current AC or DC
10 A
Surge Protection:6kV peak per IEC 61010
USE EXTREME CAUTION when working with high voltages.
DO NOT measure voltage if voltage on the "COM" input jack exceeds 600V
above earth.
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.
ALWAYS discharge filter capacitors in power supplies and disconnect the power
when making resistance or diode tests.
ALWAYS turn off the power and disconnect the test leads before opening the
covers to replace the fuse or batteries.
NEVER operate the meter unless the back cover, the battery, and fuse covers are
in place and fastened securely.
If the equipment is used in a manner not specified by the manufacturer, the
protection provided by the equipment may be impaired.
