iii
For Safety
WARNING
1. ALWAYS refer to the operation manual when working near locations at
which the alert mark shown on the left is attached. If the operation, etc.,
is performed without heeding the advice in the operation manual, there
is a risk of personal injury. In addition, the equipment performance may
be reduced.
Moreover, this alert mark is sometimes used with other marks and de-
scriptions indicating other dangers.
2. Measurement Categories
This instrument is designed for Measurement category I (CAT I). Don't
use this instrument at the locations of measurement categories from
CAT II to CAT IV.
In order to secure the safety of the user making measurements, IEC
61010 clarifies the range of use of instruments by classifying the loca-
tion of measurement into measurement categories from I to IV.
The category outline is as follows:
Measurement category I (CAT I):
Secondary circuits of a device connected to an outlet via a power trans-
former etc.
Measurement category II (CAT II):
Primary circuits of a device with a power cord (portable tools, home
appliance etc.) connected to an outlet.
Measurement category III (CAT III):
Primary circuits of a device (fixed equipment) to which power is directly
supplied from the power distribution panel, and circuits from the distri-
bution panel to outlets.
Measurement category IV (CAT IV):
All building service-line entrance circuits through the integrating watt-
meter and primary circuit breaker (power distribution panel).
3. When supplying power to this equipment, connect the accessory 3-pin
power cord to a grounded outlet. If a grounded outlet is not available,
before supplying power to the equipment, use a conversion adapter and
ground the green wire, or connect the frame ground on the rear panel of
the equipment to ground. If power is supplied without grounding the
equipment, there is a risk of receiving a severe or fatal electric shock.
or
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