Lake Shore Model 325 Temperature Controller User’s Manual
3-10 Installation
Initial Setup and System Checkout Procedure (Continued)
NOTE: For rated accuracy, the instrument should warm up for at least 30 minutes.
10. The default input settings are “Silicon Diodes” on Inputs A and B, with Input A controlling using the “Curve 01 DT-
470.” These settings can be verified by pressing the Input Setup key and following the instructions in Section 4.4.
11. The default control mode is “Manual PID” where the Proportional, Integral, and Derivative (PID) settings are
entered by the user. The default settings are P = 50, I = 20, and D = 0. These settings can be verified and/or adjusted
by pressing the PID/MHP key and following the instructions in Section 4.8.
12. For an experiment running at liquid nitrogen temperature, a setpoint of 77 K is good for testing purposes. Press
the Setpoint key. Press the “7” key twice, then press the Enter key. Details of setpoint setting are discussed in
Section 4.11.
13. The default setting for the heater is “Off.” To turn the heater on, press the Heater Range key. Press the s or t key
until “Low” is displayed. Press the Enter key. Depending on your actual setup, you may need to apply more current
to the heater, which is accomplished by selecting the “High” range. Details of heater settings are discussed in
Section 4.13.
NOTE: If any problems appear, immediately press the Heater Off key. If any error messages are displayed,
refer to Section 8.11 for details.
The Model 325 should now be controlling the temperature in the experimental setup at the setpoint temperature. Once
this initial checkout procedure is successfully completed, the unit is ready for normal operation. We recommend all users
thoroughly read Chapter 4 – Operation before attempting to use the Model 325 in an actual experiment or application.
To Next Page
