Lake Shore Model 331 Temperature Controller User’s Manual
LINEAR
Input Linear Equation Parameter Command
Input:
LINEAR <input>, <equation>, <varM value>, <X source>, <B source>,
<varB value>[term]
Format:
a,n,±nnnnnn,n,n,±nnnnnn
<input>
Specifies input to configure: A or B.
<equation>
Specifies linear equation to use.
Valid entries: 1 = (y = mx + b), 2 = (y = m(x + b)).
<varM value> Specifies a value for m in the equation.
<X source > Specifies input data to use. Valid entries: 1 = kelvin, 2 = Celsius,
3 = sensor units.
<B source > Specifies what to use for b in the equation. To use a setpoint, set its units to
the same type specified in <X source>. Valid entries: 1 = a value, 2 = +SP1,
3 = -SP1, 4 = +SP2, 5 = -SP2.
<varB value> Specifies a value for b in the equation if <B source> is 1.
Example: LINEAR A,1,1.0,1,3[term] –
The linear data for Input A is calculated from the kelvin reading
of the input using the equation: y = 1.0 * x – SP1.
LINEAR?
Input Linear Equation Parameter Query
Input:
LINEAR? <input>[term]
Format:
a
<input>
Specifies which input to query: A or B.
Returned:
<equation>, <varM value>, <X source>, <B source>, <varB value>[term]
Format:
n,±nnnnnn,n,n,±nnnnnn
(Refer to command for description)
Remarks:
Returns input linear equation configuration.
LOCK
Front Panel Keyboard Lock Command
Input:
LOCK <state>, <code>[term]
Format:
n,nnn
<state>
0 = Unlocked, 1 = Locked
<code>
Specifies lock-out code. Valid entries are 000
–
999.
Remarks:
Locks out all front panel entries except pressing the
Alarm
key to silence alarms and Heater
Off to immediately turn off the heater output. Refer to Paragraph 4.17. Use the CODE
command to set the lock code.
Example: LOCK
1,123[term]
–
Enables keypad lock and sets the code to 123.
LOCK?
Front Panel Keyboard Lock Query
Input:
LOCK?[term]
Returned:
<state>, <code>[term]
Format:
n,nnn
(Refer to command for description)
MDAT?
Minimum/Maximum
Data
Query
Input:
MDAT? <input>[term]
Format:
a
<input>
Specifies which input to query: A or B.
Returned:
<min value>,<max value>[term]
Format:
±nnnnnn,±nnnnnn
Remarks:
Returns the minimum and maximum input data. Also see the RDGST? command.
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Remote Operation
