<< Click to Display Table of Contents >> Navigation:  LCR.iQ Product Manual > Setup and Operation > Operating the Register > Setting the S1 Close time

Setting the S1 closure time properly is an important part of the setup process when using a 2-stage preset valve. If this value is not set correctly, it may cause the Register to over or under shoot the desired preset volume or cause long delays in reaching the final preset amount. S1 closure rates will depend on the flow rate of the system as well as the viscosity of the product.

 

A 2 stage preset valve is designed to allow a soft closure of the valve by transitioning from high flow, to low flow before reaching final closure. This process greatly improves the ability of the preset to stop at the exact volume desired. For the most accurate closure, it is best that once the transition from high flow to low flow is made, the flow rate should stabilize at the low flow rate for a few seconds before the final closure is reached.

 

The best way to figure out a proper setting for the S1 field is to set up the register for a normal, non preset delivery, and then begin flow at the normal operating flow rate. Once at a normal flow rate, press the Stop button on the register and watch the register closely to see how many units are measure between normal flow to a full stop. This will help to determine how many units of measure it takes to close the valve fully. Repeat this process two more times and find the average close time.  

 

Next, take the normal flow rate of the meter, calculate 2% of this number (for example, 2% of 100GPM = 2 units), then add this value to the valve close time. This number should represent a closure time that is not too long or too short for the user and allow for accurate preset volumes.

 

Here's an example: The valve close time of 2 gallons + 2% of normal flow rate is 2 GPM = 4 units to be set in S1 close field.

 

Enter the calculated value into the S1 close time field and give the system a final test to ensure the Register is now presetting accurately.  If you find that the closure time is to long, minor adjustments can be made to the S1 closure.

 

If you see that the unit is not presetting accurately, or it is over or under-shooting, then increase the S1 closure until the issue is resolved or consult with a Liquid Controls factory trained technician.