Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User’s Manual Close/Open Switching Module Channels 2-35
Figure 2-12
Model 7700 simplified schematic
Notes:
Cold Junction
Ref x3
Channel 1
HI
LO
Channel 10
HI
LO
(Channels 2–9)
Channel 11
HI
LO
Channel 20
HI
LO
(Channels 12–19)
Channel 21
HI
LO
Channel 22
HI
LO
AMPS
HI
LO
Sense
HI
LO
Input
Channel 23
2-Pole (Open)
4-Pole (Closed)
(See Note)
3A
3A
To
Model 2750
Backplane
Channel 25
(See Note)
Backplane
Isolation
Channel 24
(See Note)
Backplane
Isolation
Channels 23 and 25 in this schematic refer to the
designations used for control and are not actual
available measurement channels.
AMPS
LO
Sense
HI
LO
Input
HI
LO
Cold Junction
Ref x3
If the module is not to be internally connected
to the DMM, channels 24 and 25 can be opened
using multiple channel operation.
2750-900-01.book Page 35 Wednesday, August 3, 2011 7:56 AM

Keithley 2750 Specifications

General

Interface	GPIB, RS-232, Ethernet
Switching Speed	Up to 500 channels/second
Maximum Voltage	300V
Operating Temperature	0°C to 50°C
Measurement Functions	DCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution	6.5 digits
Current	1A
Maximum Current	1A