Keithley 2701 Service Manual

Model 2701 Service Manual Troubleshooting 4-19
Figure 4-3 provides a block diagram of the analog circuitry. Table 4-18 shows where the
various switching devices are located in the block diagram.
Table 4-18
Switching device locations
Switching devices Analog circuit section (see Figure 4-3)
Q101, Q102
Q114, Q136, Q109
K101, Q113, Q105, Q104, Q108
Q121
K102, U103, U105, U111
U133, Q119, Q123, Q124, Q125, Q126
K103
U129, U163
SSP (Solid State Protection)
DCV Divider
DCV and Ohms Switching
Sense LO
AC switching and Gain
Ohms I-Source
Current Shunts
A/D Mux and Gain

Keithley 2701 Specifications

General

Max Voltage	300 V
Max Current	3 A
Frequency Range	3 Hz to 500 kHz
Frequency Accuracy	0.01%
Weight	3.6 kg
Measurement Functions	Frequency, Temperature
Interface	IEEE-488 (GPIB), RS-232
DC Voltage Range	300 V
DC Current Range	3 A
AC Voltage Range	300V
AC Current Range	1 μA to 3 A
Resistance Accuracy	0.01%
Channels	10
Dimensions	213mm x 88mm x 370mm