21. COMMUNICATION PROTOCOL ....................................................... 156
21.1. List of commands .................................................................................... 156
21.2. Responses format for commands sent from computer level ................... 157
21.3. Commands description ........................................................................... 157
22. ERROR MESSAGES ......................................................................... 162
23. UNDER HOOK WEIGHING ............................................................... 163
24. ADDITIONAL EQUIPMENT ............................................................... 164
24.1. Anti-vibration table .................................................................................. 164
24.2. Rack for under hook weighing ................................................................ 164
24.3. Density determination kit (for solids and liquids) ..................................... 164
24.4. Additional display .................................................................................... 164