The flow rate displayed is in litres per minute. The total flow displayed is in Litres. (By pressing SHIFT to shift the display)
How to set
Provide 5-24V DC power to light on, the default power supply is DC12V.
Open the back cover of the device
Press SET for 5 seconds to enter the menu or parameters
Then press SET to select the menu
Press + or - to increase or decrease the number, hold + or – to change the numbers quickly.
Parameters
1. 1.00500-K value, this setting value is 100 times the real K value
For example: the formula of the flow sensor is F=8Q, then real K=8, setting K is 800;
Range: 1-65535
Default value:500
2. 2.00500 – upper limit alarm value
=500L/Min means the alarm will go off when the flow rate is greater than the alarm value
Range: 1-65535
Default value:500
3. 3.001.00 – lower limit alarm value
=1.00 means the alarm will go off when the flow rate is lower than 1.0 litres/min
=0, function off
Range: 0.01-655.35
Default value:1.0
4. 4.00000: Total amount alarming value. When =0, Function off.
Range: 1-65535
Default value: 0, no display, no total volume alarm output.
5. 5.00000: Alarming time period. When =0, Function off.
Range: 1-65535
Default value: 0, always alarm after triggerred, when=3, alarm for 3 seconds and then off.
6. 6.00002: Decimal,
Range: 1-3
Default value: 2. the display number will show like 2.35(L/Min)
How to calibrate
Use K (constant) to calibrate the flow rate
Frequency = K x Flow rate
If K set on 10, and the flow rate is 4 lts/min
To calibrate to 8 lts/min, change K to 5 (10x4/8)