Lakeshore 325, Руководство пользователя, Страница: 86 / 166

Lake Shore Model 325 Temperature Controller User’s Manual
5-10 Advanced Operation
SoftCal™ Calibration Curve Creation (Continued)
Use the numerical keypad to enter the measured data point at or near the boiling point of helium (4.2 K). Temperatures
outside the range of 2
– 10 K are not permitted. The message “Invalid Point. Please Reenter” is displayed if either point is
outside the acceptable range. For this example, we will enter 1.62999. Press the Enter key. The cursor will jump to the
temperature reading. Again use numerical keypad to enter the temperature the measurement was taken at. For this
example, we will enter 4.18 K. Press the
Enter key.
Point 2
+1.02111v 77.0000½
NOTE: If Point 2 is not being used, press the Enter key with both settings at their default value and advance
to Point 3.
Use the numerical keypad to enter the measured data point at or near the boiling point of nitrogen (77.35 K).
Temperatures outside the range of 50
–
100 K are not permitted. For this example, we will enter 1.02111. Press the Enter
key. The cursor will jump to the temperature reading. Again use numerical keypad to enter the temperature the
measurement was taken at. For this example, we will enter 77 K. Press the
Enter key.
Point 3
+0.51583v 302.500½
NOTE: If Point 3 is not being used, press the Enter key with both settings at their default value to complete
the SoftCal calibration.
Use the numerical keypad to enter the measured data point at or near room temperature (305 K). Temperatures outside
the range of 200
–
350 K are not permitted. For this example, we will enter 0.51583. Press the Enter key. The cursor will
jump to the temperature reading. Again use numerical keypad to enter the temperature at which the measurement was
taken. For this example, we will enter 302.5 K. Press the
Enter key.
The new curve is automatically generated and you will return to the normal display. You can check the new curve using
the Edit Curve instructions in Section 5.2.1. The curve is not automatically assigned to either input, so the new curve
must be assigned to an input by the user.