Lake Shore Model 330 Autotuning Temperature Controller User’s Manual
Remote Operation 4-15
FILT Set Display Filter.
Input: FILT 0, or FILT 1
Returned: Nothing
Remarks: Turns display filter on or off: 0 = Off, 1 = On. Quiets display by taking a running average of 10
readings.
FILT? Display Filter Query.
Input: FILT?
Returned: 0 or 1
Remarks: Returns display filter setting: 0 = Off, 1 = On.
SCHN Set Sample Channel to A or B.
Input: SCHN A, or SCHN B
Returned: Nothing
Remarks: Sets the sample channel to sensor A or B. Allow one controller update cycle (½ second)
before reading the sample data to ensure proper reading.
Example: SCHN A[term] changes the sample channel to A.
SCHN? Sample Channel Query.
Input: SCHN?
Returned: A or B
Remarks: Returns the current sample channel setting: A = channel A, B = channel B.
SDAT? Sample Sensor Data Query.
Input: SDAT?
Returned: ±000.00
Remarks: Returns sample sensor data. A free field is active here. The value returned is 7 characters: a
sign, 5 digits and a decimal point. The last digit may be a null.
Example: +1.2345[term] Typical response for a voltage query.
-123.40[term] Typical response for a degrees Celsius query.
+234.50[term] Typical response for a kelvin or degrees Celsius query.
SUNI Set Units for the Sample Channel.
Input: SUNI K, CUNI C, or CUNI S
Returned: Nothing
Remarks: Set sample channel: K = kelvin, C = Celsius, S = appropriate sensor units (volts for diodes,
ohms for RTDs, or millivolts for thermocouples).
Example: If operating in kelvin with a Model 330-11, SUNI S[term] makes the units volts – the sensor
units for a diode sensor.
SUNI? Sample Units Query.
Input: SUNI?
Returned: K, C, V, R, or M
Remarks: Current sample units setting: K = kelvin, C = Celsius, V = volts, R = Ohms, M = millivolts.
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