Danfoss TM70, Calibration Manual

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9. In CAL.ENTER mode, choose one of the following options: 2.1- > VALUE 1; 2.2 -> VALUE 2 and 2.3
-
> UNITS. Pressing “ENTER” function the required option is selected.
➢ “DOWN” function
(
▼)
: To move through the character list in a descending order.
➢ “UP” function (▲) : To move through the character list in an ascending order.
➢ “ESC” function: To return to the previous character or previous menu in the display.
➢ “ENTER” function: To validate the edited character and move to the next character.
10. Once the corresponding value to the pending load has been assigned, the value in the display will be
of three digits plus a comma. Units must be edited such that the value represented and the units are
coherent. Validate the value inserted pressing START. VALUE 1 will be memorised.
11.
Press “ESC” to return to the previous menu in order to edit the units. Units must have no more than
three characters.
12. Press STOP and restart the crane again. Replace the load with another known load.
13. Repeat the process again (steps 4 to 8) selecting VALUE 2 in the Calibration menu.
14. Once finished the feedback calibration process, the system will be calibrated.
At this point the system is ready to work normally. Until calibration is performed, data appearing in the
display will be inconsistent.
Calibration generates a linear interpolation of the possible values. This means that it can be used with all
systems that generate a linear analogue outputs. For non linear systems the interpolation will not produce a
correct display value. Calibration allows to obtain negative values.
Example of calibration of a load cell:
➢
Enter into the calibration mode and introduce the value corresponding to the hook without load (1st
value).
➢
Validate the value pressing START. Extinguish the transmitter.
➢
Start the system again and raise a known load.
➢
Extinguish the transmitter and enter again to the calibration mode for the edition of the 2
nd
value.
➢
Press START to validate the value.
➢
Press pushbutton 1 to edit the units.
➢
Press START to validate the units.
➢
Extinguish the transmitter.
➢
The equipment is already ready to work normally.
Notes; Value 1 - to be zero. Value 2; to be span