"Difference is too small" message (during calibration)

"Difference is too small" message (during calibration)

The reason for the message is that the change in analogue output from the scale base between zero calibration and the span calibration value is too small.

The most likely reason is that the amount of weight placed on the scale for span calibration is too small – the minimum value should normally be around 50kg or 120 lbs.

Other less likely reasons could be:

  • The load cell cable from the scale base junction box to the indicator is disconnected, cut, or damaged

  • Doing a span calibration without putting weights on to the scale

  • Doing the zero calibration with weights sitting on the scale

  • Failed load cell

  • Mechanical bind under the scale preventing the full load being detected by all four load cells.

    • Related Articles

    • "Not enough weight" message displayed when trying to calibrate

      This message is displayed when the scale Analogue to Digital (A to D) converter doesn't see enough change from zero to the calibration weight value.  Normally this is a problem when using only 40 kg for calibration. Things to try: Try using 100 kg ...

    • "Error Data Nil" message

      The "Error Data Nil" message on the passenger panel means that power is applied, but no RS-485 data is received at the passenger panel. The centre two pins of the connector and cable are used for the communications. This issue can be associated with ...

    • "Bad addr" message on passenger panel

      The command from the operator panel has a standardised format that includes an address byte. The message on the passenger panel indicates that the format received is unexpected. The fault could be with the operator panel, load cell cable or the ...

    • Screen shows ADC 2 error

      This is usually a short circuit in the load cell cable, or an internal problem in the trimmer box. If the input signal from the load cells is shorted to the excitation voltage, then the scale will first read "Heavy Bag", then display the message "ADC ...

    • Changing display from kg to lb

      Press and hold the F4 key down to get into the configuration menu (Dip switch 1 needs to be on, located under the small back cover on the rear of the indicator). Under the scale menu, scroll down using the F3 button until you find the menu "Allow ...