Keithley 2010 Service Manual

Figure 4-3 provides a block diagram of the analog circuitry. Table 4-17 is provided to show
where the various switching devices are located in the block diagram.
Table 4-15
Ω 2 signal multiplexing and gain
Range
Signal
(U163)
U176
pin 1
U176
pin 8
U176
pin 9
Gain
(U177)
U176
pin 16
10Ω
100Ω
1kΩ
10kΩ
100kΩ
1MΩ
10MΩ
100MΩ
S4
S4
S4
S4
S4
S4
S4
S4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
X100
X100
X10
X10
X10
X1
X1
X1
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
Table 4-16
Ω 4 signal multiplexing and gain
Range
Signal
(U163)
U176
pin 1
U176
pin 8
U176
pin 9
Gain
(U177)
U176
pin 16
10Ω
100Ω
1kΩ
10kΩ
100kΩ
1MΩ
10MΩ
100MΩ
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
S4 then S7
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
X100
X100
X10
X10
X10
X1
X1
X1
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
Table 4-17
Circuit section locations for switching devices
Switching devices
Analog circuit section
(see Figure 4-3)
Q101, Q102, Q153
Q114, Q136, Q109
K101, Q113, Q105, Q104, Q108, Q167
K102, U103, U105, U111
U133, Q123, Q125, Q124, Q126, Q120
K103, Q164, Q165
U163, U177, U176
SSP (Solid State Protection)
DCV Divider
DCV & Ohms Switching
AC Switching & Gain
Ohms I-Source
Current Shunts
A/D Mux & Gain
Troubleshooting 4-17

Keithley 2010 Specifications

General

Frequency Range	3 Hz to 300 kHz
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
DC Current Range	3 A
DC Current Accuracy	0.05%
AC Current Range	3 A
Resistance Accuracy	0.01%
Interface	GPIB, RS-232
Power Supply	50 Hz or 60 Hz