Analog Output Modes; Mode 0; Figure 18 Analog Current Output Connection - Vaisala PWD22/52 User Manual

Chapter 5 ________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 69
Figure 18 Analog Current Output Connection (External Current
Source)

Analog Output Modes

The actual instant Visibility value used in the analog output calculation is
first limited to the maximum range of the sensor. Thus, the maximum
value of the analog output may be set higher whereas the actual output is
limited by the sensor's range. The MIN VISIBILITY limits the low end.
If the abs (max current minus min current) is more than (>) 1.5, then the
current range of 0 ... 20 mA will be used. This is a default configuration.
Otherwise, the current range of 0 ... 1 mA must be jumper X13. For
details, see Appendix B, PWC22/52 Connectors and Jumper Settings, on
page 107.

Mode 0

Mode 0 indicates standard linear visibility to the current mode. The
maximum visibility must be higher than the minimum visibility as well
as the corresponding currents.
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