Lake Shore 321-01 User Manual
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Lake Shore Model 321 Autotuning Temperature Controller User’s ManualOperation 3-93.2.6.3 Entering Voltage Values from a Lake Shore SoftCal ReportIf a Lake Shore SoftCal Report was purchased, the voltage values for the 2 or 3 point calibrationcan be entered and the resulting modified Standard Curve 10 stored as Curve 12 in the controller.To enter the voltages, pressing the SoftCal button. Use either the s, t, or SoftCal button to cyclethe selector arrow (→) to V (Voltage). You will see the following display.Press Enter. You will see the following display.This procedure will assume a 3 point SoftCal was obtained. The Customer will now enter the 3voltages corresponding to the temperature points on the report. (A 2 point SoftCal uses the sameprocedure, but skips the 4.2 K entry.) With the selector arrow (→) pointing to 4.2 K, press the Enterbutton.NOTE: In this example, we will be using voltages taken from a sample Lake Shore SoftCalReport. These values are for example only. Since voltage values are unique toindividual silicon diode sensors, the Customer should substitute the values from theirreport when following this procedure.For this example, the Lake Shore SoftCal Report provided a reading of 1.6339 V corresponding to4.2 K. For the Model 321, you must round the provided voltage to four places. Use the numerickeypad to enter the voltage. You will see the following display.If you attempt to enter a value that is ±10° from the Standard Curve 10, you will see the followingerror message.A similar message will be displayed if entering an incorrect value for 77.3 K or 305 K.Once the proper voltage value is entered, press the Enter button. The display will read“Processing...” for a couple of seconds, and then will return to the temperature selection display.Use the s, t, or SoftCal button to cycle the selector arrow (→) to 77.3 K and press the Enterbutton. Again look at the SoftCal Report and enter the voltage corresponding to 77.35 K. In thisexample, the report provided a value of 1.0215. You will see the following display. |
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