LST400 | ULTRASONIC LEVEL TRANSMITTER | OI/LST400-EN REV. E
19
8 Examples
Distance measurement
11.55 ft / 3.50 m
16.5 ft / 5.00 m
Transducer
Piston
The above application deals with a moving piston:
The maximum range for the piston is 16.5 ft / 5.00 m and the
closest the piston can get to the transducer is 1.63 ft / 0.50 m
(Due to the blanking of the transducer).
Security code
Mode DISTANCE
Empty distance
Span
Blanking
Rate of change
Below is what LST400 will display on the above application.
Dist. 11.55 ft
mA Output: 14.66mA
Instant: 11.55 ft
Temperature: 20°C
Percentage: 66.66%
The analogue output should be approximately 14.66mA.
Level measurement
Empty distance
16.5 ft / 5.00 m
2.46 ft / 0.75 m
Blanking distance 1.63 ft / 0.50 m
RELAY1 SET 13.2 ft / 4.00 m
RELAY 1 RESET 11.55 ft / 3.50 m
Span 14.85 ft / 4.50 m
RELAY 2 SET 3.28 ft / 1.00 m
RELAY2 RESET 4.95 ft / 1.50 m
NOTICE
Set the relay set and reset point further apart to avoid the
relays from chattering.
Below is what LST400 will display on the application above.
Relay 1 will switch on (set) when the level rises above 13.2 ft /
4.00 m and reset when the level goes below 11.55 ft / 3.50 m.
Relay 2 will switch on (set) when the level drops below 3.28 ft /
1.00 m and reset when the level goes above 4.95 ft / 1.50 m.
Level 13.94 ft
mA Output: 19.11mA
Instant: 2.46 ft
Temperature: 20°C
Percentage: 94.44%
Security code
Mode LEVEL
Empty distance
Span
Blanking
Rate of change
Setup relays YES
HI
LO
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