Lake Shore Model 321 Autotuning Temperature Controller User’s Manual
Operation
3-3
3.2 THERMOMETRY
FUNCTIONS
The following front panel keyboard function are related to the thermometry or temperature control
aspects of the Model 321.
Function Paragraph
Input Type ........................ 3.2.1
Units................................. 3.2.2
Temp. Compensation ...... 3.2.3
Display Filter .................... 3.2.4
Curve ............................... 3.2.5
SoftCal ............................. 3.2.6
3.2.1 Input
Type
The
Input Type
button has been included to permit the user to ascertain the internal DIP switch
setting configuration that determines the type of sensor input. When first configured at the factory, the
Model number will correspond the type of sensor to be used with the controller. A Model 321-01 will
display the following message.
A Model 321-02 will display the following message.
A Model 321-04 will display the following message.
The Input Type display is for information only; no user changes are available. The display will remain
visible for 3 seconds and then will return to the normal display.
In addition to showing input sensor type, pressing and holding
Input Type
has the function of turning
the Display Filter on or off. Refer to Paragraph 3.2.4. For thermocouple units only, the extra Input
Type display is Temperature Compensation. Refer to Paragraph 3.2.3.
3.2.2 Units
The
Units
button gives a slightly different display depending on the sensor input and model number.
All three models permit selection of temperature displays in kelvin (K) or degrees Celsius (°C). The
difference is in the selection of sensor output. For the silicon diode used with the Model 321-01, the
additional units selection is Volts (V). Refer to Paragraph 3.2.2.1. For the platinum resistor used with
the Model 321-02, the additional units selection is ohms (
Ω
). Refer to Paragraph 3.2.2.2. For the
thermocouple used with the Model 321-04, the additional units selection is millivolts (mV). Refer to
Paragraph 3.2.2.3. Units in K is the default for all models.
