System Options
5-56 Manual # 42-02-7223
Calibration
Manual Calibration with Weights
The Calibration with Weights procedure is the most accurate and recommended method of cal-
ibrating the EMCO Load Weigher. This procedure allows the EMCO control unit to do the fol-
lowing:
• 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 the actual value of
the weight, in kilograms, into the control unit. The load weigher will then learn this weight
• You will also enter the value of the car’s overload weight into the control unit.
• The EMCO control unit will use this information to scale the analog output so that when
the sensors detect the overload weight, the output voltage is about 10 volts. The analog
output for the weights between empty car weight and overload weight will then be linear
from about 0.0 volts to 10 volts.
Calibration procedure:
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. Verify that the sensors are installed on the wire ropes per the previous instructions.
4. 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’s 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.
5. Learn the full load weight:
• Press the menu button until is displayed, if it is not shown already.
• Add the full load weight to the car.
• Enter the value of the full load weight, in kilograms (1lb = .45359Kg). For example, if
the full load weight is 2000lb, enter 0907 (2000 x .45359 = 907.18). Press the but-
ton to select a digit (blinks when selected) and press the button to set the value.
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