Keithley 2750, User Manual

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Model 2750 Multimeter/Switch System User’s Manual Getting Started 1-5
Rack mount kit
Model 4288-7 rack mount kit — Mounts a Model 2750 in a standard 19-inch rack.
Includes rear brackets to provide additional support for a mainframe that has two or more
switching modules installed.
NOTE
The Model 2750 includes hardware that allows it to be mounted to the front rails
of a standard 19-inch rack. With two or more switching modules installed, rear
support brackets may be required. The Model 4288-7 rack mount kit includes
rear support brackets.
Model 2750 features
Model 2750 is a 6
H
-digit high-performance multimeter/data acquisition system. It can mea-
sure voltage (DC and AC), current (DC and AC), resistance (2- and 4-wire), temperature
(thermocouple, thermistor, and 4-wire RTD), frequency and period, and test
continuity.
The Model 2750 has five slots that will accommodate Keithley Model 7700 series switch-
ing modules (
Table 1-1 ). Each channel of a switching module that is closed or scanned is
measured by the Model 2750. For scanning, each channel can have its own unique setup
(i.e., function, range, digits, etc.).
More information on the measurement capabilities of the Model 2750 is provided in
“DMM measurement capabilities,” page 3-2 . A connection guide for the Model 7700 is
provided in Appendix B .
Additional features of Model 2750 include:
•
Setup storage
— Five instrument setups (three user, *RST defaults and factory
defaults) can be saved and recalled.
•
Offset compensated ohms
— A two-measurement process for 4-wire ohms to
cancel the effects of thermal EMFs. Available for the 1
Ω
, 10
Ω
, 100
Ω
, 1k
Ω
, and
10k
Ω,
ranges.
•
Dry circuit ohms
— Low voltage mode (20mV open-circuit clamping) for 4-wire
ohms measurements. Available for the 1
Ω
, 10
Ω
, 100
Ω,
and 1k
Ω
ranges.
•
Math
— mX+b, percent, and reciprocal (1/X) calculations provide mathematical
manipulation of readings.
•
Relative
— Null offsets or establish baseline values.
•
Ratio and channel average
— Ratio and average calculations for two switching
module channels.
•
Buffer
— Store up to 110,000 readings in the internal buffer.
•
Limits
— Two sets of high and low reading limits to test devices.
2750-900-01.book Page 5 Wednesday, August 3, 2011 7:56 AM