Glen Mills Laboratory Lab Jar Mill - No Accessories 144447207331 but unable to zero it

but unable to zero it out and the display fluctuates between 0

Manufacturer ABB Model Number AL9

Manufacturer Pioneer Model Number PL-12D-II SKU 19-80592 Ref 23-115832

Manufacturer Opt Machine Vision Model Number DCA24E-4 / LXTT1822921-W SKU 19-51699 Ref 23-100144

Manufacturer Lutron Model Number HQRD-PRO-WH SKU 19-77780 Ref 23-112047

Glen Mills Laboratory Lab Jar Mill - No Accessories 144447207331 but unable to zero itCondition Used Description This item is fully tested and in excellent working order. Item will come with a 30 Day Warranty. Cosmetically in good condition showing minor scuffs scratches blemishes from previous use. The power cable has insulation visible near the switch (no bare wire visible). Includes Laboratory Jar Mill as pictured. No additional items or accessories are included. Photos are of the actual unit for sale. Inventory is on hand and ready