Portioner Calibration - WMF 5000 S+ Service Manual

Service

2.4.3 Portioner calibration

Coffee grinder actuation is time-controlled. In order to be able to enter the amount of ground coffee in grams in a recipe, a portioner
calibration is necessary. A portioner calibration determines the amount of ground coffee dispensed per second of running time. Based on this, the machine can
calculate
the running time needed for the amount of ground coffee programmed in the recipe.
A portioner calibration is needed, or must be repeated:
 For a new machine during commissioning
 When using a different type of coffee than was used for the last portioner calibration
 After changing the grinding degree setting
 After replacing the grinder disks
 After opening or cleaning a grinder (during maintenance, for example)
Preconditions:
 Bean hoppers must be half full
 Grinder must be completely filled with fresh ground coffee
 The grinder motor must be at operating temperature → Run 10 grinding cycles prior to starting calibration
 In order to ensure that residual water does not falsify the calibration (up to 3 g of water can be present in the connecting hoses), proceed as follows:
 Discard and do not use the ground coffee from the first portioner calibration
 Afterward, remove the brewer and clean it, dry it, and reinstall it
 Alternatively, a new or cleaned brewer can be used for the calibration
 Also clean and dry the coffee grounds container (for machines with the „Grounds through counter" option, the coffee grounds container
must be closed in order to perform the calibration)
Measurement equipment / accessories needed:
 Scale with a resolution of at least 0.1 g and accuracy of at least ±0.3 g
 Other electronic equipment (such as mobile phones or laptops) can interfere with electronic scales - do not use the scale in the direct vicinity of other
electronic devices
 The scale must be set on a flat, level surface
 When weighing ground coffee, we always recommend transferring the ground coffee from the coffee grounds container into a tared paper cup or measuring
container in order to minimize measurement errors
Start the portioner calibration and follow the instructions on the display: Service > Service routines > Portioner calibration
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