Lake Shore 350, User Manual

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5.6.1 Monitor Units 91
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5.6.1.1 Polarity and Monitor Out Scaling Parameters
In the Monitor Out and Open Loop modes, the unpowered analog outputs can be con-
figured as either unipolar (0 V to +10 V) or bipolar (–10 V to +10 V) outputs. In bipolar
mode, the Monitor Out –10 V setting determines the temperature or sensor value at
which the output should be –10 V. In unipolar mode, the Monitor Out 0 V setting
determines the temperature or sensor value at which the output should be 0 V. The
Monitor Out +10 V setting determines the temperature or sensor value at which the
output should be +10 V in either unipolar or bipolar modes.
Unipolar and bipolar mode
Bipolar
Lowest Middle Highest
–10 V 0 V +10 V
0 V +5 V +10 V
Lowest Middle Highest
Input mode
Input
Output
Input
Output
Unipolar
For example, if Polarity is set to Bipolar, then setting the Monitor Out –10 V parameter
to 0 K and the Monitor Out +10 V parameter to 100 K will cause the analog output to
correspond to the input temperature as shown in FIGURE 5-3. In this case if the actual
reading was 50 K, then the output would be at 0 V (middle of the scale).
Analog output with polarity set to bipolar
Bipolar
0 K 50 K 100 K
–10 V 0 V +10 V
Input
Output
If we set the Polarity parameter to Unipolar, the output would be as shown in

FIGURE 5-4. In this case if the actual reading was 50 K, the analog output would be
+5 V (middle of the scale).
Output with polarity parameter set to unipolar
0 V +5 V +10 V
0 K 50 K 100 K
Input
Output
Unipolar
Menu Navigation:
Output Setup
Q
Output ( 3 or 4 )
Q
Polarity
Q
(Unipolar or Bipolar)
Output Setup
Q
Output ( 3 or 4 )
Q
Monitor Out –10 V
Q
(See note below)
Output Setup
Q
Output ( 3 or 4 )
Q
Monitor Out 0 V
Q
(See note below)
Output Setup
Q
Output ( 3 or 4 )
Q
Monitor Out +10 V
Q
(See note below)
Monitor Out -10 V, 0 V, and +10 V settings depend on the Monitor Units selected, and are
limited to the acceptable values of the selected units.
Default: Polarity
Q
Unipolar
Monitor Out -10 V
Q
0.0000 K
Monitor Out 0 V
Q
0.0000 K
Monitor Out +10 V
Q
1000 K
Interface Command:
ANALOG
FIGURE 5-2
FIGURE 5-3
FIGURE 5-4