4
To ensure operators’ ability to use measuring instruments safely,
IEC 61010 classies the locations in which instruments are used
into a series of safety-based measurement categories (ranging
from CAT II to CAT IV). Using an instrument that does not satisfy
the required safety level can lead to an electrical accident.
All development, design, and manufacturing processes for
almost all Hioki digital multimeters are carried out at our
Head Ofce in Nagano Prefecture. Some of the industry’s
most advanced technological capabilities enable us to
deliver products of the highest possible quality.
Safe measurement requires use of an instrument
that suits the measurement location.
Designed and manufactured in Japan to
ensure high quality and guaranteed with a
3-year warranty for peace of mind
CAT IV 600 V
Measurement category
suited to the location of use
Terminal-to-ground voltage
High-end models CAT III 1000 V / CAT IV 600 V
Standard models CAT III 1000 V / CAT IV 600 V
Pocket models CAT III 600 V / CAT IV 300 V
Service wires
Distribution
panel
L1
N
L2
Line voltage:
100 V
TV: 100 V
100V
100V
Air conditioner: 200 V
Line voltage:
200 V
Line voltage:
100 V
Pole-mounted
transformer
Electric
wires
Ground (0 V)
Measurement categories
Terminal-to-ground voltage
Buried wires
Transformer
Outlet Outlet
Service
connection
Service
wires
Power meter
Distribution
panel
Distribution
panel
Fixed
equipment
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