Cathy, 

Regarding how to calibrate Tanita BLB-12 scales or any of Tanita's professional baby scales, I've just checked Tanita's website for their weight for calibrating baby scales, but did not readily find this weight, nor did I readily find the Tanita BLB-12 scale that you referenced.  

Here is a link to their website and the page on their current professional baby scales.  This page includes a link for each scale's product guide (I would think that calibration information would be listed in the product guide for each model).   
http://www.tanita.com/en/baby-scales/

For questions on how to calibrate Tanita scales through their customer service department: 
http://www.tanita.com/contact-us/

Tanita is an international company, and their scales have a strong reputation for accuracy.  Although it's been a while since I last contacted Tanita's customer service department, I do recall finding their staff friendly and professional.  

Debra Swank, RN BSN IBCLC
Ocala, Florida USA
More Than Reflexes Education
http://www.MoreThanReflexes.org
http://www.MoreThanReflexes.org/on-learning/

<Does anyone know how to calibrate Tanita BLB-12 scales?  
<Cathy
<Sent from my T-mobile 4G LTE Device

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