Replace weight sensor

In this document you will find a description how to replace the weight sensor in the Smartb 

   

 

 

 You will need: 

 

 a new weight sensor kit 

 a set of allen keys 

 trimmers 

 cutters 

 

 

 

 

 

 Before replacing disconnect device from the power supply! 

 

 Step 1 Unscrew the top floor  

 

 

 

 

 

 The top floor is bolted directly from the strain gauge beams 

 Unscrew the 4 screws marked on the picture 

 

 

 

 

 

 

 

 

 

 Step 2 Unplug the sensor 

 

 

 

 

 

 Unplug the sensor 

 

 

 

 

 

 

 

 

 Step 3 Remove zippers 

 

 

 

 

 

 

 

 

 

 

 Step 4 Unscrew sensor form frame 

 

 

 

 

 

 There are two bolt (for each load cell) form bottom (alen key 4) 

 

 

 

   

 

 

 

 

   

 

 

 

 

 

 

 

 

 

 Step 5 Set new sensor 

 Pay special attention to the direction! The beam has an arrow drawn on it. This arrow should point down and be on the opposite side of the mounting screws to the frame! (see photo below) On the front of the device, the arrow should be on the left and on the back on the right. 

 

 

 

 

 

 first place the beams in their final positions 

 screw the first one (closer to the front door) 

 then the second one at the back similarly to the description (on the back it is on the other side) 

 

 

 

 

 

 

 

 

 

 Step 6 Secure cable and PCB with zippers 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 Step 7 Plug in a new sensor 

 

 

 

 

 

 

 

 

 

 

 

 Step 8 Screw flor again 

 The floor is not symmetrical! Orient it similarly to the others! 

 

 

 

   

 

 

 

 

 

 

 Step 9 Wieght calibration 

 Full calibration is required after load cell replacement. THIS IS A DIFFERENT CALIBRATION THAN ZERO CALIBRATION FROM THE MENU. Right now there is no possible full calibration from user menu. 

 Calibration consists of 4 stages 1. empty beam 2. load placed at the back 3. load placed in the middle 4. load placed at the front