Milltronics AiRanger SPL PL-573, Инструкция по эксплуатации

Страница: 95 / 113

PL-573 AiRanger SPL Page 95
Technical Refer
e
nce
Example 2 - Space Measurement
This mode of operation is commonly used when remaining vessel capacity is of more
importance to the installation than the actual material level.
Space
For this example we'll assume the following:
•
the vessel is a 3 ft diameter by 15 ft long cylinder (including the parabolic ends of 1.5
ft each).
•
the maximum vessel filling rate is 1 ft per minute (slower at mid level).
•
a mA output scaled from 4 mA at Full to 20 mA at Empty is required for PLC
operation.
•
in the event of a measurement difficulty, failsafe operation is to be activated in 6
seconds.
•
if the difficulty doesn't subside, the mA output must immediately assume 22.00 mA.
•
an XCT-8 transducer is mounted in a standpipe so that the face is 18 in. above the
vessel top.
•
a TS-3 temperature sensor is mounted in the vessel to monitor liquid temperature.
1.5ft
(P052)
12.00 ft
(P053)
4.50 ft
(P006)
3.00 ft
(P007)