Operating Precautions
14
Before Attaching a Multiplexer Unit
Before Connecting the Multiplexer’s Connector
• To avoid electric shock, before removing or replacing a Multiplexer
Unit, confirm that the instrument’s main power switch is off and that
the measurement leads, power cord, and all connectors have been
disconnected.
• The mounting screws must be firmly tightened or the Multiplexer Unit
may not perform to specifications, or may even fail.
• Failure to fasten the connectors properly may result in sub-specifica-
tion performance or damage to the equipment.
• When connecting a measurement target with electromotive force (a
battery or power supply), take steps to protect against short-circuits.
• The Z3003 Multiplexer Unit’s maximum allowable voltage for contacts
is 33 V RMS/46.7 V peak, or 70 V DC. Do not connect directly to a
dielectric strength tester or insulation resistance tester.
• To avoid the danger of electric shock, never operate the instrument
with a multiplexer unit removed. To use the instrument after removing
a multiplexer unit, install a blank panel over the opening of the
removed unit.
• When inserting in the unit, hold the metal plate. Directly touching the board
may cause static electricity and lead to damage of the instrument. (Using
the wrist strap for preventing static electricity when inserting is recom-
mended.)
• To prevent malfunctions when not using the Multiplexer Unit, store it using
the packaging materials in which it was delivered.
Before Using D/A Output
• To avoid electric shock and instrument damage when connecting a device
to the instrument’s D/A output terminal, turn off main power switch on the
instrument and the device being connected and ensure that the measure-
ment leads have been disconnected from the measurement target.
• The maximum output voltage that can be generated from the D/A output is
5 V. If the rated voltage of the device being connected is less than 5.5 V, the
connected device could be damaged.
• D/A output is not isolated from the ground circuit. If the device connected to
D/A output is not isolated from the ground circuit, the error component in
measured values will increase.
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