Loadstar Sensors LoadVUE (LV-400,LV-1000,LV-4000,LV-7000) Load Cell - Manual (Page 26)

LoadVUE User Guide • 24
Loadstar Sensors, Inc. • www.loadstarsensors.com
Example 2: The relay is closed from 0 to 11 lb.
The relay is open for values > 11 lb.
The relay retains its status between 10 and 11 lb. That is, if the load decreases from
11.5 to 10.5 lbs, the relay will stay open. If the load increases from 9.5 lb to 10.5 lb, the
relay will stay closed.
Set L2 = 11, L1=10
Select ‘Close’ for values below L1 and ‘Open” for values above L2. Select ‘Hold’ for
values between 10 and 11 lb.
Enter 0 on the ‘Simulate-Min’ box and 20 on the ‘Simulate-Max’ box. These are just
values you enter to verify the operation of the relay, and do not have to match actual
loading min and max.
Move the slider between the Min and Max values to test the relay operation.
Note: If you are using a preset loading rate to trigger the relay (instead of just the load), the graph
window also shows the loading rate in addition to the loads. The loading rate axis is drawn on the
right hand side as a secondary axis. During logging operations, the loading rate is also logged along
with the load readings.
The loading rate is computed at 1 second intervals. If the logging is done at a higher rate, say 10
times a second, the same loading rate will be logged.
The default LoadVUE-Relay program does not support the loading rate option. Please contact us if
you need this feature.
You can ensure the state of the relay at certain key instants, such as when LoadVUE is started or
shutdown, by selecting the options from the
Advanced tab of the Relay Options window, as shown
below. The following choices are available: