3-8
IM CA71-E
3. Before Starting Source/Measurement
■ Operating Environment
Operating Environment
Ambient Temperature and Humidity
Use the CA51/71 in the following environment:
• Ambient temperature: 0 to 50°C
• Ambient humidity: 20 to 80 % RH (no condensation)
• Location: indoors
• Operating altitude: 2000 m max. above sea level.
■ Measurement Category
Measurement Category of Main unit
WARNING
Do not use the CA51 or CA71 for measurements in location that fall
under Measurement Category IV.
The instrument is designed for measurement category III.
Measurement
Category
Description
Remarks
O
(None, Other)
Other circuits that are not directly
connected to MEAINS.
Circuits not connected to
a mains power source.
CAT II
For measurement preformed on
circuits directly connected to a
low-voltage installation.
Appliances, portable
equipment, etc.
CAT III
For measurement preformed in a
building installation.
Distribution board,
circuit breaker, etc.
CAT IV
For measurement preformed at the
source of a low-voltage installation.
Overhead wire,
cable systems, etc.
Category of Lead cables (RD031)
WARNING
When you use the lead cables, attache or remove the caps according to
the measurement category.
With caps:
1000V 10A CAT III / 600V 10A CAT IV
With no caps:
1000V 10A CAT II
Summary of Contents for CA71 HANDY CAL
Page 110: ......
