Interactive SourceMeter® Instrument Reference Manual Section 2:
2450-901-01 Rev. B/September 2013 2-69
Basic connections
The front and rear terminals of the instrument are rated for connection to circuits rated
Measurement Category I only, with transients rated less than 1500 V peak above the
maximum rated input. Do not connect the instrument terminals to CAT II, CAT III, or CAT IV
circuits. Connection of the instrument terminals to circuits higher than CAT I can cause
damage to the equipment and expose the operator to hazardous voltage.
Do not exceed the maximum allowable voltage differentials. Exceeding the voltage
differentials can result in electric shock and damage to the equipment.
Common mode voltage must be externally limited to 250 VDC, 1.05 A maximum. Failure to
limit the common mode voltage can result in electric shock and damage to the equipment.
You can access the FORCE HI, FORCE LO, SENSE LO, and SENSE HI connections from the front
or rear panel of the instrument. The front panel has banana jack connections and the rear panel has
triaxial connections.
The front panel of the instrument shows the maximum allowable voltage differentials between
terminals. The maximum common mode voltage is the voltage between FORCE LO and chassis
ground. You must limit the current from an external common mode voltage source. You can use a
protective impedance or a fuse to limit the current.
The GUARD connections are only available from the rear panel of the instrument.
To remove a triaxial cable from the rear panel, turn the cable's connector counterclockwise and pull it
off the rear panel.
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