Analog Output Modes; Mode 0; Figure 20 Analog Current Output Connection (External Current Source) - Vaisala PWD22 User Manual

User's Guide _______________________________________________________________________
78____________________________________________________________________ M210543EN-B
Figure 20 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 section Jumper Settings and Connectors
on page 52.

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.
0312-0125