Monitor Units; Polarity And Monitor Out Scaling Parameters - Lakeshore 335 User Manual

5.6.1 Monitor Units

The Monitor Units parameter determines the units of the Control Input sensor to use
for creating the proportional voltage output. The Monitor Out scaling parameter set-
tings will be entered using the units chosen for this parameter.
Menu Navigation:
Output SetupQOutput 2QOutput Type (Voltage)QOutput Mode (Monitor Out)Q
Control Input (None, Input A, Input B)QMonitor Out Units (Kelvin, Celsius, or Sensor)
Default: Kelvin
Interface Command: ANALOG

5.6.1.1 Polarity and Monitor Out Scaling Parameters

In the Monitor Out and Open Loop modes, the voltage output can be configured as
either unipolar (0 V to +10 V) or bipolar (–10 V to +10 V). 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 tem-
perature 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.
Bipolar
Input mode
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 voltage output to
correspond to the input temperature as shown in FIGURE 5-4. In this case if the actual
reading was 50 K, then the output would be at 0 V (middle of the scale).
Bipolar
FIGURE 5-4 Analog output with polarity set to bipolar
FIGURE 5-5 shows the output if the Polarity parameter is set to Unipolar. In this case if
the actual reading was 50 K, the voltage output would be +5 V (middle of the scale).
Unipolar
FIGURE 5-5 Output with polarity parameter set to unipolar
Menu Navigation:
Output SetupQOutput 2 QOutput Type (Voltage)QOutput Mode (Monitor Out)Q
Control Input (None, Input A, Input B)QMonitor Out Units (Kelvin, Celsius, or Sensor)
QPolarity (Unipolar or Bipolar)
ENTER
Output SetupQOutput 2 QMonitor Out
below)
Output SetupQ Output 2 QMonitor Out
Input
Lowest Middle
–10 V
Output
Lowest Middle
0 V
FIGURE 5-3 Unipolar and bipolar mode
Input
0 K
–10 V
Output
0 K
0 V
0 V (Unipolar) or
+10 V
Q(See note below)
5.6.1 Monitor Units
Highest
0 V +10 V
Input
Highest
+5 V +10 V
Output
50 K 100 K
0 V +10 V
Input
50 K 100 K
+5 V +10 V
Output
-10 V (Bipolar)Q(See note
|
www.lakeshore.com
73