switch to 230 for use with a 230 volt input. See section 3.2.2. Rear Panel Controls
for an image of the rear panel.
Do not replace the power supply cord with an improperly rated
cord. For North American: A UL listed and CSA labeled power
cord must be used with the instrument in the United States and
Canada. The power cord must include a NEMA5-15 style male plug, SVT or SJT cord
sets, and be rated for at least 125VAC, 10A, number 16 gauge (or 125VAC, 15A,
number 14 gauge) wire or larger, and the length of the cord does not exceed 2 m must
be used. For European: A certified power supply cord not lighter than light PVC
sheathed flexible cord according to IEC 60227, designation H03 VV-F or
H03 VVH2-F (for equipment mass not exceeding 3 kg), or H05 VV-F or H05 VVH2-F2
(for equipment mass exceeding 3 kg), and be rated for at least 3G 0.75 mm² (for rated
current up to 10 A) or 3G 1.0mm² (for rated current over 10 A up to 16 A) wire or
larger, and the length of the cord does not exceed 2 m must be used.
Do not switch the line voltage selector switch located on the
rear panel while the instrument is on or operating. This may
cause internal damage and represents a safety risk to the
operator.
The 620L must be connected to a good ground. Be certain that
the power wiring is properly polarized and that the proper low
resistance bonding to ground is in place.
2.2.3. Basic Connections
Power Cable
The instrument is shipped with a line cord containing a protective earth ground. When
the line cord is connected to an appropriate AC power source the cable will connect
the chassis to earth ground.
The main plug shall only be inserted in a socket outlet with a
protective ground (earth) contact. This protective ground must
not be defeated by the use of an extension cord without a
protective conductor.
Return Connection
When the instrument’s return is grounded, any internal and external stray leakage will
be monitored due to currents that flow from high voltage to earth ground (such as from
high voltage to the chassis of the instrument). These currents are inherent and will
cause errors when trying to monitor very low leakage currents in the micoamp range.
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