Ignore consecutive duplicates with 232key – parcel scale usage example

232key version 2016.2.3 comes with the ability to ignore consecutive duplicates. This means that you can instruct 232key to ignore identical data captured several times in a row. I’ll explain this new feature with two usage examples.

Usage example 1: Manually transferring the weight from a scale

Let’s say that you’ve set up 232key to capture the weight from a scale and type it into a parcel processing software running on a PC. To send the weight from the scale, the user presses the “Print” button on the scale’s indicator:
Print key Ohaus Defender 3000 parcel scale

Everything works fine, except that sometimes the button is inadvertently pressed twice, generating two parcel labels. You can use 232key’s new feature to prevent this from happening by checking the “ignore consecutive duplicates” option:
Ignore consecutive duplicatesThe new ignore function will prevent the second weight from being typed. However, sometimes you might actually encounter two parcels with the same weight in a row. The second parcel would now be ignored by 232key. To fix this, click on the “Adjust…” button and enter a time limit (in milliseconds, e.g. “3000” for 3 seconds):
Time limit

Any data received after the indicated time has passed is no longer ignored. Each new captured value resets the timer.

Usage example 2: Using auto print mode

In auto print mode, a scale sends the weight automatically without requiring the user to press a button. Not all scales are equipped with this mode and not all auto print modes work in the same way. The Ohaus T31P indicator used in our example has a very simple auto-print mode: It sends every stable weight to the connected PC. This can cause issues if the weight of an item fluctuates between two values: The scale might send these values several times for as long as the item remains on the platform (e.g. 20.00 and 20.05 [kg]).

This is where the second setting in the “ignore consecutive duplicates” dialog comes into play: By defining a tolerance, 232key ignores a range of values. For our example, we’d enter a tolerance of Ā±0.05:
Time limit and toleranceNow, when the scales sends a weight of 20.05 after just having sent 20.00, it is considered a duplicate and is not typed by 232key.


  • The toleranceĀ setting is only available if you’ve selected a numeric device in the “input” tab. It doesn’t make sense to apply a tolerance to text devices, e.g. barcodes received from a barcode reader.
  • If data is captured by 232key, it becomes the new reference for both the tolerance and timeout setting even if it is ignored (unless it’s empty, i.e. it contains no printable characters). For our second example with a tolerance setting of 0.05, this means that a value of 20.00 (received first) would be typed, but 20.05 (second) and also 20.10 (third) would be ignored (20.05 + 0.05 = 20.10).
  • We recommend that you set a timeout in addition to the tolerance setting to restrict the ignore function (but you don’t have to).
  • The new ignore function is not meant to be used with scales working in continuous mode (continuously transferring data several times per second).

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