Lake Shore Model 231 User’s Manual
1-2
Introduction
Once the Model 231 obtains temperature data, it
transmits it as a current from 4 to 20 mA. The
current output changes linearly with sensor
temperature. Output scale depends on the selected
temperature range. Several switch selected ranges
are available. For highest accuracy and sensitivity,
set the output for a narrow temperature band. An
optional 0 to 20 mA output is also available to
convert output to a voltage reading scaled from zero.
A 500
±0.02% precision resistor is provided for
this purpose. This resistor produces the maximum
full-scale output of 10 V.
A 5 VDC supply powers Model 231 circuitry.
The outputs are isolated so several 231s can
operate from the same supply without interference.
The +5 VDC can also be supplied from the pins on
the VME bus connector.
Mechanical mounting is easy because the
Model 231 is built on a standard size VME card.
It fits directly into a single height (3U) VME card
holder. The transmitter does not use the electrical
bus format, only its physical shape and power
supply.
Figure 1-1. Typical
Model 231 Front Panel
Summary of Contents for 231
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