LabLISP Guide

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**//LAKESHORE-TEMPERATURE-CONTROLLER//**

Package: ''TCON''

===Hosted functions:===

''SETPOINT''

Get or set the sample temperature setpoint.

<code lisp>
>(tcon::setpoint)
300.0

>(tcon::setpoint 250)
250.0
</code>

''GET-T''

Reading actual temperature from channel A, B, C, D. The channel symbols A, B, C, D are also in package TCON. Without argument, defaults to the sample channel D.

<code lisp>
>(tcon::get-t 'tcon::a)
296.321
</code>

''CHANGING?''

Predicate, indicates if the controller is waiting for stable temperature

<code lisp>
>(tcon::changing?)
T
</code>

''HEATER-OUTPUT''

Just returns the actual heater output in percents.

<code lisp>
>(tcon::heater-output)
2.2                     ; controller shows 2.2%
</code>

''HEATER-RANGE''

Get or set the heater range as number. Heater off is 0, low range is 1, mid range is 2, high range is 3. Normally we use range 3 for normal operation.

<code lisp>
>(tcon::heater-range)
0                           ; heater is off

USER>(tcon::heater-range 3) ; sets heater on
3
</code>

''BRACKET''

Get or set the bracket defining stable temperature, with maximum delta T and time spent in that interval.

<code lisp>
>(tcon::bracket)
(1.0 30.0)     ; delta T is 1 K, waiting time is 30 sec

USER>(tcon::bracket '(2 20))  ; parameter must be list of numbers
(2.0 20.0)
</code>

===Symbols that represent channels:===

''TEMPERATURE''

''A''

''B''

''C''

''D''