Keithley 2700 Service Manual

Troubleshooting 4-13
Analog signal switching states
Table 4-5 through Table 4-11 provide switching states of the various relays, FETs, and ana-
log switches for the basic measurement functions and ranges. These tables can be used to assist
in tracing an analog signal from the input to the A/D multiplexer.
Table 4-5
DCV signal switching
Range Q101 Q102 Q114 Q136 Q109 K101* Q113 Q105 Q104 Q108
100mV
1V
10V
100V
1000V
ON
ON
ON
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
SET
SET
SET
SET
SET
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
* K101 set states: Pin 8 switched to Pin 7
Pin 3 switched to Pin 4
Table 4-6
ACV and FREQ signal switching
Range Q101 Q102 K101* K102*
U103
pin 8
U103
pin 9
U105
pin 9
U105
pin 8
U103
pin 16
U103
pin 1
U105
pin 1
U111
pin 16
100mV
1V
10V
100V
750V
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
RESET
RESET
RESET
RESET
RESET
RESET
RESET
SET
SET
SET
ON
ON
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
* K101 and K102 reset states: Pin 8 switched to Pin 9
Pin 3 switched to Pin 2
K101 and K102 set states: Pin 8 switched to Pin 7
Pin 3 switched to Pin 4

Keithley 2700 Specifications

General

Type	Digital Multimeter
Measurement Functions	DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Frequency, Temperature
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Frequency Range	3 Hz to 500 kHz
Temperature Range	-200°C to +1372°C
Display	Vacuum Fluorescent Display
Connectivity	IEEE-488, RS-232
Channels	10
Power Supply	100V to 240V AC, 45Hz to 66Hz
DC Current Range	10 µA to 3 A
AC Current Range	10 µA to 3 A
Temperature Measurement	Thermocouple, RTD