Keithley 2700 User Manual

3-22 Basic DMM Operation Model 2700 Multimeter/Switch System User’s Manual
Model 7700 switching module
Connections for the switching module are shown in Figure 3-9. As shown in Figure 3-9A,
each of the 20 channels can be used to perform Ω2 measurements. For Ω4 measurements, a
channel pair is used for each 4-wire measurement as shown in
Figure 3-9B.
For Ω4 connections, channels 1 through 10 (which are used as the INPUT terminals) are
paired to channels 11 through 20 (which are used as the SENSE terminals). Channel 1 is
paired to channel 11, channel 2 is paired to channel 12, and so on.
Figure 3-9
Ω2 and Ω4 connections for Model 7700 switching module
Shielding
To achieve a stable reading, it helps to shield resistances greater than 100kΩ. As shown in
Figure 3-8 and Figure 3-9, place the resistance in a shielded enclosure and connect the
shield to the input low terminal of the instrument electrically.
H
L
CH 1-10
Model 7700
Switching
Module
H
L
CH 11-20
B. Ω4 Connections
INPUT
SENSE
Resistance
Under Test
Optional Shield
Shielded
Cable
Shielded
Cable
H
L
CH 1-20
Model 7700
Switching
Module
Resistance
Under Test
Shielded
Cable
Optional Shield
A. Ω2 Connections
Note: Source current flows from input
high (H) to input low (L).

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