4
Megohmmeter Models 6528/6529
MEASUREMENT CATEGORIES
Thank you for purchasing the True Megohmmeter
®
Model 6528 or 6529. For best results
with your instrument:
■
Read
this user manual carefully
■
Respect
precautions for use
AC - Alternating current
DC - Direct Current
AC or DC
Double insulated
Shock Hazard
Fuse
Battery
Instructions that must be
read and understood
Instrument follows
recycling directives
Comply with US directives
Sorting for the recycling
of electric and electronic
waste
Earth Ground
Danger Hazard
770 V
Voltage on the instrument
should not exceed 770V
RMS
Definition of Measurement Categories (CAT)
■
CAT IV:
Test and measurement circuits connected to the source of the building’s
low-voltage network installation.
Example: Measurement on equipment installed upstream of the main fuse or
building installation cut-off switch.
■
CAT III:
Test and measurement circuits connected to parts of the building’s low
voltage network installation.
Example: Measurement on distribution switchboards (including secondary meters),
the circuit breakers, cabling including cables, busbars, junction boxes, circuit
breakers, power outlets in the fixed installation and industrial instruments and
other equipment such as motors permanently connected to the fixed installation.
■
CAT II:
Test and measurement circuits directly connected to points of use (power
outlets and other similar points) on the low voltage network.
Example: Measurement on circuits in network for household appliances, portable
tools and other similar instruments.
