Overview of Screens Chore-Tronics® 2 Control
56
MT1843B
Potentiometer Calibration (Natural Ventilation Only)
This procedure involves using the manual toggle switches for the Main Curtains open
and close Outputs. Always place the open or close switch in its manual “on” position
by itself. Never place both the open and close switches in the manual “on” position
at the same time. This will cause the Curtain Machine to try to open and close at the
same time and could cause motor or Relay failure.
To calibrate Potentiometer 1, go to the "Main 1 Curtain Calibration" portion of the
calibration screen (Figure 70, below).
1. Begin by measuring how long it takes the
Main 1 Curtain to move 18 inches. Enter
this amount time at the "Main 1 speed"
line.
2. Measure the total travel distance of the
Curtain from the closed limit switch to
the open limit switch. Enter the number
of inches at the "Mechanical full open
limit" line. Return open Toggle Switch to
the "off" position.
Turn the close toggle switch to manual “on”
position and run the Curtain completely
closed. When the Curtain is completely
closed turn the toggle switch to the manual
“off” position.
3. Enter the Current pot 1 readout value with
Curtain completely closed at the “Pot 1
readout at close limit” line.
Turn the open toggle switch to manual “on”
position and run the Curtain completely
open. When the Curtain is completely open
turn the toggle switch to the manual “off”
position.
4. Enter the Current pot 1 readout value with
the Curtain completely open at the “Pot 1
readout at mech. open limit” line.
Repeat the procedure above if Main 2 Curtain
is used.
Caution!
MT1842-083 10/04
1
Figure 70. Setup-Control Screen:
Calibrate Tab, Potentiometer Calibration
1
2
3
4