Industrial Floor Scale, 48" x 48", 5000LB/0.5LB, PEC Focus on Industry for 60 Years

How do you power it? Looking to install this in the bed of my work van.

When it says "5000lb/0.5lb", does that mean it is a 5000 lbs. capacity with a .5 lbs. accuracy?

How often does it takes readings? the frequency of sampling?

How does the Tare weight work on it?