Keithley 1801, Instruction Manual, Page: 10 / 93

List of Illustrations
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2 Installation
Figure 2-1 Preamplifier module configuration ..................................................................................................... 2-2
Figure 2-2 Power supply card configuration ........................................................................................................ 2-3
Figure 2-3 Power and output connections ............................................................................................................ 2-4
Figure 2-4 Typical analog output connections ..................................................................................................... 2-5
Figure 2-5 Power supply card installation ............................................................................................................ 2-6
Figure 2-6 Power supply connections .................................................................................................................. 2-7
Figure 2-7 Connections to multimeter input ........................................................................................................ 2-8
Figure 2-8 Input cable connections ...................................................................................................................... 2-8
Figure 2-9 Using the thermal isolator container ................................................................................................... 2-9
3 Operation
Figure 3-1 Filter frequency response curves ........................................................................................................ 3-5
Figure 3-2 Connections for DC voltage measurements ....................................................................................... 3-8
Figure 3-3 Connections for AC voltage measurements ..................................................................................... 3-10
Figure 3-4 Connections for 4-wire resistance measurements ............................................................................. 3-12
Figure 3-5 Connections for frequency measurements ........................................................................................ 3-13
Figure 3-6 Connections for differential temperature measurements .................................................................. 3-16
Figure 3-7 Thermal EMF generation .................................................................................................................. 3-19
Figure 3-8 Magnetic field generation ................................................................................................................. 3-21
Figure 3-9 Minimizing interference from magnetic loops ................................................................................. 3-21
Figure 3-10 Power line ground loops ................................................................................................................... 3-23
Figure 3-11 Eliminating ground loops ................................................................................................................. 3-24
4 Performance Verification
Figure 4-1 Connections for DC volts verification ................................................................................................ 4-4
Figure 4-2 Connections for AC volts verification ................................................................................................ 4-7
5 Service Information
Figure 5-1 Connections for offset voltage adjustment ......................................................................................... 5-3
Figure 5-2 Connections for offset current adjustment .......................................................................................... 5-3
Figure 5-3 Calibration connections ...................................................................................................................... 5-5
Figure 5-4 Block diagram ................................................................................................................................... 5-11