XITRON 2000I, Руководство пользователя

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Applications 53
Low-Level Application Summary
•
To reduce thermal E.M.F. voltage interference to acceptable levels:
ü
Use twisted pairs of 26 AWG (or smaller) wire.
ü
Use the Xitron Technologies option
SP48
shielded lead set.
•
To reduce current interference to acceptable levels:
ü
Use twisted pairs of 26AWG (or smaller) wire with Teflon®
insulation.
ü
Use Polyethylene insulated shielded cables or short lengths of bare
wire.
•
In both voltage and current low-level applications, reduce the movement
of personnel near the instrument and cabling to a minimum, and place all
line wiring and digital cabling at a distance from the analog signal cables
or wires.
Process Control Industry Applications
The 2000 instruments can be used in the process control industry:
•
For calibration and maintenance applications.
•
Wherever an accurate source of DC voltage or current is required.
•
As a strain gauge bridge simulator with bridge supplies and as a RTD
thermometer bridge simulator with bridge supplies.
•
As an external DC supply in remote sites.
•
As an accurate simulator of most transducers.
Calibrating in Process Control Environments
The 2000 instruments may be used to calibrate low-level DC voltage or
current equipment, such as, chart recorders, nullmeters, galvanometers,
analog to digital and digital to analog convertors. The 2000 instruments meet
the in-field calibration requirements of the process control industry.
Caution: Connecting the 2000 instruments to an active process control
system may adversely affect that system’s safety.