B-4 Model 7700 Connection Guide Model 2700 Multimeter/Switch System User’s Manual
Connections and wiring
WARNING The following information is intended for qualified service personnel.
Do not make or break switching module connections unless qualified
to do so.
WARNING To prevent electric shock that could result in serious injury or death,
adhere to the following safety precautions:
• Before removing or installing the switching module in the
mainframe, make sure the Model 2700 is turned off and
disconnected from line power.
• Before making or breaking connections to the switching module,
make sure power is removed from all external circuitry.
• Do not connect signals that will exceed the maximum
specifications of the Model 7700. Specifications are provided in
Appendix A.
WARNING If both the front panel terminals and the switching module terminals
are connected at the same time, the test lead insulation must be rated
to the highest voltage that is connected. For example, if 1000V is
connected to the front panel input, the test lead insulation for the
switching module must also be rated for 1000V.
WARNING Dangerous arcs of an explosive nature in a high energy circuit can
cause severe personal injury or death. If the multimeter is connected to
a high energy circuit when set to a current range, low resistance range,
or any other low impedance range, the circuit is virtually shorted.
Dangerous arcing can result even when the multimeter is set to a
voltage range if the minimum voltage spacing is reduced in the
external connections. For details to safely make high energy
measurements, see “High energy circuit safety precautions” in
Section 3.
As described in the International Electrotechnical Commission (IEC)
Standard IEC 664, the Model 2700 is Installation Category I and must
not be connected to mains.
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