US308MT Digital Flow Meter

US308MT User Manual-V20240127

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 12V DC power to light on.

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)