Lakeshore 340 - Page 132

Lake Shore Model 340 Temperature Controller User’s Manual
9-34 Remote Operation
<range> Specifies the input range (refer to Paragraph 5.1.4). This parameter has a
predetermined value based on <type>. If this parameter is supplied, <type>
changes to 0 (Special). Valid entries are (given in volts):
1 - 1 mV 4 - 10 mV 7 - 100 mV 10 - 1 V 13 - 7.5 V
2 - 2.5 mV 5 - 25 mV 8 - 250 mV 11 - 2.5 V
3 - 5 mV 6 - 50 mV 9 - 500 mV 12 - 5 V
Example: INTYPE A, 2[term] - Sets Input A sensor type to GaAlAs diode.
INTYPE B, 3, , , 7[term] - Sets Input B sensor type to Platinum 100, but use a 30 µV
excitation. Input B now responds as a Special.
INTYPE? Query Input Type Parameters
Input: INTYPE? <input>
Returned: <type>, <units>, <coefficient>, <excitation>, <range>. Format: n,n,n,nn,nn[term]
Remarks: Returns input type parameters. See the INTYPE command for parameter descriptions.
<input> Specifies which input to query.
KEYST? Query Keypad Status
Input: KEYST?
Returned: <keypad status>. Format: n[term]
Remarks: Returns keypad status since the last KEYST?. 1 = key pressed, 0 = no key pressed.
KEYST? returns 1 after initial power-up.
KRDG? Query Kelvin Reading for an Input
Input: KRDG? <input>
Returned: <kelvin value>. Format: ±nnn.nnnE±n[term]
Remarks: Returns the kelvin reading for an input. <input> specifies which input to query.
LDAT? Query Linear Equation Data for an Input
Input: LDAT? <input>
Returned: <linear value>. Format: ±nnn.nnnE±n[term]
Remarks: Returns the linear equation data for an input. <input> specifies which input to query.
LDATST? Query Linear Equation Data Status for an Input
Input: LDATST? <input>
Returned: A bit weighted integer from 0 - 255. Format: nnn[term]
Remarks: The integer returned represents the sum of the bit weighting of the input linear equation data
status flag bits. <input> specifies which input to query. See RDGST? Command.
LINEAR Configure Input Linear Equation Parameters
Input: LINEAR <input>, [<equation >], [<varM value>], [<X source>], [<B source>], [<varB
value>]
Returned: Nothing
Remarks: Configures the linear equation for an input.
<input> Specifies input to configure.
<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 * × –SP1.