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Side 47
Ultrasonic Level Meter
Operation Manual
environment 7.
◆
"6 Alarm setting"
Set alarm relay.
Alarm 1 mode:
closed mode, low-level alarm and high-level alarm are
optional. Closed: relay 1 is out of service; low-level alarm: relay 1 sends
low-level alarm signal; and high-level alarm: relay 1 sends high-level alarm
signal. Factory default is closed mode.
Alarm 1 value:
the unit is m and factory default is 0.
Alarm 1 Diff(Alarm 1 return difference):
the unit is m, and after being
triggered, the alarm can be canceled only after the measured value reaches the
alarm value +/- alarm return difference. Factory default is 0.
Setting method of alarm 2/3/4 mode is the same as above.
Example: (how to use a relay to control startup/shutdown of water pump)
Through alarm return difference, one relay can control the whole working
process of water pump from low level to high level.
For water drainage: when water level is below 1m, water pump stop draining;
when water level rises to 5m, water pump start to drain water. Detailed settings
are shown below:
Alarm 1 mode: high-level alarm. Alarm 1 value: 5.00m; alarm 1 return
difference: 4.00m.
For water supply: when water level is below 1m, water pump start to feed
water; when water level rises to 5m, water pump stop feeding water. Detailed
settings are shown below:
Alarm 1 mode: low-level alarm. Alarm 1 value: 1.00m; alarm 1 return
difference: 4.00m.
