Hired-Hand System 1000 Power Curtain - Manual (Page 11)

System 1000 Power Curtain Features
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ratio--one inch of machine movement gives two inches of curtain
movement.) Although there are many combinations for cable and
pulleys, this controller will support only two ratios (1:1 or 1:2).
Sensors Display
As you scroll through the programming features, you will notice three
screens with a lot of information in them. The screen which reads "S1:-
(Some Temperature) S2:-(Some Temperature)..." shows the temperature
read by each sensor.
This information is very useful when troubleshooting the controller.
From this screen, you can see which sensor(s) may not be operating
properly, or see the individual temperatures read by the sensors.
Manually Set Speed
This option allows you to experiment with the variable speed fans. If
you are not sure of the speed you want, you can test here until you find
the speed you want. The controller will ask for a percentage, then when
entered, will run the fan, or fans at that percentage and ask if you would
like to change again. This feature is only operable when in selected
features. The controller will not automatically control temperature, or
curtain machines while in selected features.