You'll find the "Put-away Unit of Measure Code" (field no. 7307) on the Item Card, grouped together with other Warehouse-related fields.
Anyways, I've given it another thought and I don't think that alone will solve your problem...
You must understand that NAV allows you to define and use different UOMs throughout the system according to the following:
Base UOM = used in Item Ledger Entries (basically your Inventory)
Sales UOM = shows on Sales Docs., but related entries are converted during posting into Base UOM
Purchase UOM = like Sales UOM on Purchase Docs.
Put-Away UOM = used in Warehouse Entries (your Bin Content).
This works thanks to the "Item Unit of Measure" table, were you define A FIXED conversion factor between the different UOMS (as multiples of Base UOM).
Even if you define a Sales UOM, your not obliged to use it in Sales Docs.: when you validate the Item No., the Sales UOM is automatically filled out, but you can overwrite it with any other valid UOM that you've defined for that particular product.
The problem at hand is that you have an Item of Variable Weight, so this automatic conversion between Sales UOM and Base/Put-Away UOM will always give you an error on Qty.
The way I see it, either you need to customize NAV or change your process to one of the following options:
- Use the same UOM throughout (Base/Sales/Purchase/Put-Away) for Variable Weight Items (either all in NOS or KGS but not a mix).
- Define NOS as 1 KG to be able to show NOS on Sales Doc but register the correct quantity on Ledger Entries.
I've got a customer that opted for changing the process for these products (they only suppose around 2-3% of their Item catalogue) and it works fine.
If you don't have a high proportion of variable weight items, I'd recommend that instead of customizing.