Lakeshore 330 User Manual page 60

Lake Shore Model 330 Autotuning Temperature Controller User's Manual
SETP
Sets the Setpoint In Units Chosen For Control Channel.
Input: SETP XXX.XX for temperature, or SETP X.XXXX for voltage
Returned: Nothing
Remarks: For the setpoint parameter, enter a value from 0 to 999.9 for temperature or 0 to 2.4990 for
voltage. Utilizes the free field format. Resolution is 0.01 for temperatures below 200.
Example: If in kelvin:
If in Celsius: 3. SETP -123[term] will result in the display showing –123.00 °C.
SETP?
Setpoint Status Query.
Input:
SETP?
Returned: ±XXX.X for temperature, or ±X.XXXX for voltage
Remarks: Returns current set point setting, a 7-digit value (a sign, 5 digits, and a decimal point).
Resolution is 0.01 for temperatures below 200.
Example: Using the examples above in the SETP command discussion:
If in kelvin:
If in Celsius: 3. SETP?[term] returns -123.00[term].
TUNE
Sets Autotuning Status.
Input:
TUNE X
Returned: Nothing
Remarks: Sets Autotuning status: 0 = Manual, 1 = P, 2 = PI, 3 = PID, 4 = Zone. See Paragraph 3.3.4 for
details on Autotuning settings.
TUNE?
Autotuning Query.
Input:
TUNE?
Returned: X
Remarks: Returns current Autotuning status: 0 = Manual, 1 = P, 2 = PI, 3 = PID,
4 = Zone. See Paragraph 3.3.4 for details on Autotuning settings.
ZONE
Zone Storage.
Input:
ZONE XX,±SSS.S,R,PPP,III,DDD
Returned: Nothing
Remarks: Stores the stated values of Setpoint, Heater Range, Gain, Rate, and Reset. Zone XX is
between 01 and 10. ±SSS.S = setpoint in kelvin, R = heater range, PPP = gain, III = Reset,
DDD = Rate. For Heater Range: 0 = Heater off, 1 = Heater Low, 2 = Heater Medium, 3 =
Heater High. Use the TUNE command to activate the zone autotuning mode.
Example: ZONE 1,100.0,2,100.0,100,20[term] instructs the Model 330 to store in Zone 1 a
100.0 K setpoint, a 2 (Medium) Heater Range, a 100 Gain, a 100 Reset, and a 20% Rate.
ZONE?
Zone Storage Query.
Input:
ZONE? XX
Returned: ±SSS.S,R,PPP,III,DDD
Remarks: When entering the zone command, XX defines the zone between 01 and 10. Returns:
±SSS.S = setpoint in kelvin, R = heater range, PPP = gain, III = Reset, DDD = Rate. For
Heater Range: 0 = Heater off, 1 = Heater Low, 2 = Heater Medium, 3 = Heater High. Use
TUNE command to activate zone autotuning mode.
4-18
1. SETP 77.2[term] will result in the display showing 77.20 K.
2. SETP 123[term] will result in the display showing 123.00 K.
4. SETP 123.456[term] will result in the display showing 123.46 °C.
1. SETP?[term] returns +077.20[term].
2. SETP?[term] returns +123.00[term].
4. SETP?[term] returns +123.45[term].
Remote Operation