Power Supply Card - Keithley 1801 Instruction Manual

2.2.2 Power supply card

Figure 2-2 shows the configuration of the power supply
card. Components include:
Cover
The plastic cover shields circuit board parts from damage
and contamination. In order to open the cover, press in on
the cover latch, then swing the cover open on its hinges.
Analog Output
The analog output terminals are intended for connecting
the preamplifier output to a monitoring device such as a
chart recorder. See paragraph 2.3 for details.
Power Connector
The power connector and connecting cable supply power
and control signals to the preamplifier module. They also
feed the analog output signal back to the power supply
card.
Cover
Latch 1
Figure 2-2
Power supply card configuration
LO
Earth 6
Analog
2
Cover
Output
Cable Clamp
The cable clamp provides a strain relief for the output
leads and power cable.
Output Leads
The two output leads are terminated with banana plugs
intended to connect to the multimeter input jacks. Red is
HI, and black is LO. See paragraph 2.5.2 for information
on output connections.
Shield Jumper
This jumper allows you to connect the cable shield and
preamplifier shell either to earth ground or to input LO.
Installing the jumper in the earth ground position allows
the unit to meet its stated low common-mode current but
will degrade common-mode noise rejection (if an AC sig-
nal is floating on input LO). Installing the jumper in the
LO position will degrade the common-mode current but
will provide the specified common-mode noise rejection.
Shield Jumper
(W101)
5
Output Leads
Cable Clamp
3
4
Power
connections
Installation
2-3