* Switch on Calibration switch which is in the back of Weight scale
* Turn on weight scale
* Press green key until CAL mode appear in screen
* Press green key, screen will show USER modev * Press blue key Screen will show COM mode
* Press blue key screen will show CMD.SR
* Press blue key again
* Press green key until RS232 mode
* Press blue key for CMD.SR mode
* Press green key to confirm .
* Screen will display INTFC ,then press blue to confirm
* Press green key and Select TYPE 4 and press blue key to confirm
* Press again green key
* Screen will display BUD.RT then press blue key to confirm
* Press green key and Select 9600 and press blue key to confirm
* Screen will display BUD.RT then press blue to confirm
* Press green key then Screen will display BT.FMT then press blue key
* Press green key and select 7E1 and press blue key
* Press green key and select END and press blue key
* Press green key and select END and press blue key
* Press green key and select END and press blue key
* switch off Calibration mode which is in the back of weight scale