Lake Shore Model 331 Temperature Controller User’s Manual
Analog Output In Input Mode (Continued)
Bipolar mode refers to whether or not negative voltages are used, as shown below.
Bipolar Mod
e
: On
Bipolar Mod
e
: On
Bipolar Mod
e
: Off
Bipolar Mod
e
: Off
10 V
+10 V
0 V
Lowest
Middle
Highest
Input
Output
0 V
+10 V
+5 V
Lowest
Middle
Highest
Input
Output
Input Mode
Input Mode
For this first example we will choose Bipolar Mode On. Press the
Enter
key.
Enter for AnOut
-10V Value 0½
The –10 V value is entered using the numeric keypad, which includes the numbers 0
–
9, +/–, and
decimal point. For this example, we will enter 0 K. Press the
Enter
key.
Enter for AnOut
+10V Value 100½
The +10 V value is entered using the numeric keypad, which includes the numbers 0
–
9, +/–, and
decimal point. For this example, we will enter 100 K. Press the
Enter
key. You are returned to the
normal display.
The analog output will now correspond to the input temperature as shown below. For example, if the
actual reading was 50 K, the analog output would be at 0 V (middle of the scale).
Bipolar Mod
e
: On
Bipolar Mod
e
: On
10 V
+10 V
0 V
0 K
50 K
100 K
Input
Output
If we repeat the same procedure using all the same settings, but select Bipolar Mode Off, the output
would be as shown below. In this case, if the actual reading was 50 K, the analog output would be
+5 V (middle of the scale).
Bipolar Mod
e
: Off
Bipolar Mod
e
: Off
0 V
+10 V
+5 V
0 K
50 K
100 K
Input
Output
Operation
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