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34
Chapter 4
Programming Guide
Level
Example 1 Level Measurement
empty distance (P105), 11.0 feet
100%, span (P106), 10.0 feet
(output = 20mA)
high alarm on (P213), 8.5 feet
high alarm off (P214), 8.0 feet
low alarm off (P224),1.5 feet
low alarm on (P223),1.0 feet
0% , empty level (output = 4mA)
In this example, the
blackbox
and dB6 is being used to monitor a moving
level within a vessel and is required to provide a 4 to 20mA output
proportional to the level, over a range of 10.0 feet. In addition, when the level
rises to 8.5 feet, Relay ‘1’ is required to give a high alarm and rest when the
level falls to 8.0 feet. In the event that the level should fall to 1.0 feet then
Relay ‘2’ is to give a low alarm and reset once the level rises to 1.5 feet.
