Sanitary flow sensors: Programming

Display and indications

LEDs 0…9 light up in green to indicate the flow in 10% increments of the taught flow rate. One LED represents the switch point. When red, the output is open and when orange, the output is closed.
LEDs 2 and 3 are used for programming.

Factory default configuration

Out of the box, the SI has the following parameters:

Flow velocity from 5…100 cm/s for water
Switch point at LED 7 (70…79 cm/s)
Normally open output function

If these parameters fit within your application, no further programming is required.

The following table provides flow rate equating to 100 cm/s of various media and pipe size. Note that for oil and gas, the values listed are estimates. Test the sensor in your application to confirm its suitability.

	100 cm/s flow velocity
Line size	Water (gpm)	Oil (gpm)*	Air (cfm)*
1/2	3	8	4
1	8	20	10
2	30	80	45
4	130	320	170
6	290	725	390
8	515	1285	690
10	800	2000	1075
12	1160	2890	1550
14	1585	3935	2100
16	2060	5140	2750

Oil requires 2-3 times the velocity of water for the same thermal response and air requires about 10 times the velocity of water.

Adjusting the settings

To fine tune the settings or when using media other than water, follow these steps.

1	Perform the high-flow adjustment. Set the system flow to its normal flow rate. Press and the right arrow button. LED 9 lights and after 5 seconds, it flashes. Release the button.
2	Perform the low-flow adjustment. Set the system flow to its minimum or no flow rate. Press and hold the left arrow button. LED 0 lights and after 5 seconds, it flashes. Release the button.
3	To change the switch point, press the left or right arrow button to decrease or increase the switch point.

Note: If your application calls for a fast response time, set the switch point for a lower LED (fast response on increasing flow) or a higher LED (fast response on decreasing flow).