Milltronics airanger XPL plus, Инструкция по эксплуатации, Страница: 91 / 114

7ML19981AN02 AiRanger XPL Plus – INSTRUCTION MANUAL Page 87
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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
30 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 such that the XCT-8 face is 18 in.
above the vessel top.
• an AO-10 is connected to the Peripheral Communications terminals.
• a TS-3 temperature sensor is mounted in the vessel to monitor liquid
temperatures.
Parameter Settings For Point # 1
P001 Operation Enter "2" for space.
P002 Material No entry required (preset for liquid).
P003 Measurement Response No entry required. (preset for medium, 1 m/min).
P004 Transducer Enter "101" for XCT-8.
P005 Units Enter "4" for feet.
P006 Empty Enter "4.5" for 4.50 ft (3 feet diameter plus 1.5 ft in
standpipe).
P007 Span Enter "3" for 3 ft (vessel diameter).
P070 Failsafe Timer Enter ".1" for 6 seconds.
P071 Failsafe Material Level Enter "Lo" for advance to Empty on "LOE".
1.5 ft
(P052)
12.00 ft
(P053)
3.00 ft
(P007)
4.50 ft
(P006)