Load Weigher
3-29
3
Motion 4000
Calibration
Manual Calibration with Weights
This procedure allows the EMCO control unit to do the following:
• Learn the empty weight of the car and set this weight as the zero reference (the analog
voltage output from the control unit will be about zero volts at this weight).
• Learn a known weight. You place a known weight in the car and enter it into the control
unit. The load weigher will then learn this weight.
• If you are using the analog output, you will enter the car overload weight value. The con-
trol unit uses this information to scale the analog output so that, at the point the sensors
detect overload conditions, the analog output is about 10 volts. The analog output from
empty to overload weight will be linear from about 0.0 to 10.0 volts.
• If you are using the relays, you will enter the set points for each relay.
1. Before programming or calibrating the sensors and control unit:
• Bring car to the lowest floor of its total travel.
• Bounce in car to verify that it is free on guide rails.
2. Verify that the sensors are properly connected to the control unit.
3. Power up the control unit and verify that the input voltage is within the voltage range of
the control unit.
4. Verify that the sensors are installed on the wire ropes per the previous instructions.
5. Learn the empty car weight (Zero the control unit):
• Press the menu button until is displayed.
• Press the button once. The display will flash.
• While the display is flashing, press the menu button once. If the display stops
flashing before you press the menu button, you must start over.
• The control unit display begins to count down. Exit the cartop before the countdown
finishes.
• When the zero calibration is complete, will be displayed. If is not
shown, the value has not been saved and this step must be repeated.
6. Learn a known weight (full load is recommended):
• Press the menu button until is displayed, if it is not shown already.
• Place a known weight in the car (full load recommended).
• Enter the value of the known weight. Press the button to select a digit (blinks when
selected) and press the button to set the value.
If the overload weight (125% of full load) will exceed 9999 lbs, use a percentage of the full load
weight instead. For example, if full load weight is 9,000 lbs, scale it to 80% by entering 7200.
That way, overload weight will be under 9999 lbs (9000 lbs with the given example). If overload
value exceeds 9999 lbs, the load weigher will display err7.
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