User Manual

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2.4 Connection of the Input Product
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2.4.2 8951 VOLTAGE/CURRENT UNIT
DANGER
Precautions when using the 3273, 3273-50, and the 3276
CLAMP ON PROBE
When conductors being measured carry in excess of the
safe voltage level (SELV-E)* and not more than 300 V, to
prevent short circuits and electric shock while the core
section is open, make sure that conductors to be measured
are insulated with material conforming to (1) Measurement
Category (Overvoltage Category), (2) Double (reinforced)
Insulation Requirements for Working Voltages of 300 V, and
(3) Pollution Degree 2. For safeties sake, never use this
sensor on bare conductors. The core and shield case are
not insulated.
Be careful to avoid damaging the insulation surface while
taking measurements.
Refer to the following standards regarding the meanings of
underlined terms.
IEC 61010-1 (JIS C 1010-1)
IEC 61010-2-031 (JIS C 1010-2-31)
IEC 61010-2-032 (JIS C 1010-2-32)
Precautions when using the 3274 and the 3275 CLAMP ON
PROBE
When conductors being measured carry in excess of the
safe voltage level (SELV-E)* and not more than 600 V (CAT II)
or 300 V (CAT III), to prevent short circuits and electric shock
while the core section is open, make sure that the conductor
insulation satisfies the (1) Basic insulation requirements for
the applicable (2) Measurement Category (Overvoltage
Category, (3) Working Voltage, and (4) Pollution Degree. For
safeties sake, never use this sensor on bare conductors.
Be careful to avoid damaging the insulation surface while
taking measurements.
Refer to the following standards regarding the meanings of
underlined terms.
IEC 61010-1 (JIS C 1010-1)
IEC 61010-2-031 (JIS C 1010-2-31)
IEC 61010-2-032 (JIS C 1010-2-32)
WARNING
When you are using the clamp to the 8855, the 8951 GND,
clamp GND, and power supply terminals of modules on other
channels are not insulated. Exercise care in handling these
to avoid damaging this instrument or suffering from injury.
To avoid shock and short circuits, turn off all power before
connecting probes.
*: The voltage levels are 30 V rms and 42.4 V peak or 60 V DC.