Porter Scales

           W.B. Porter & Co., Inc.           
Celebrating 50 Years as the Triangle Area's leading source for industrial and laboratory weighing solutions.
1721 Lake Wheeler Road
Raleigh, North Carolina 27603

Tel: 919.828.1750
Fax: 919.755.0991

P.O. Box 27905
Raleigh, North Carolina 27611

We want your feedback!

As the name suggests, this is YOUR page.  We've set this page up to give you a place to ask questions or offer feedback about our service, equipment, quality system, or anything else that's on your mind.  Please use the form below to submit your feedback.  Scroll down for answers to customer questions, and news items that may interest you.

Thanks for your input.  Knowing what's on your mind will enable us to better serve your needs.

How often do we need to calibrate our scales?

This is arguably the most common question we are asked.  Unfortunately, it's also a question that just doesn't have an easy, definitive answer.  There are many factors involved, including:

  • How often do you use your scales?
  • How critical are the scales to your process?
  • What governmental or internal quality standards are you required to meet?
  • What happens to your product if a scale is found to be out of tolerance?  Can it be salvaged, or will it have to be scrapped?  What do you stand to lose if a scale is not working properly?

To establish a calibration interval, we suggest that you start with the manufacturer's recommendation (which is no doubt too often) and then adjust it based on documented historical experience.  If you find that quarterly calibration results show the scales to be out of tolerance each time, you may want to consider calibrating more frequently, perhaps monthly.  On the other hand, if your scales are rarely or never out of tolerance, it may be that you only need to have them calibrated every six months.  In the final analysis, this is a decision that only you can make.

Lorrie Blackburn
Quality Manager

1 comment | Add a New Comment
1. Mary | June 24, 2009 at 01:52 AM EDT

Pretty cool post. I just found your blog and wanted to say
that I've really enjoyed browsing your blog posts. Anyway
I'll be subscribing to your feed and I hope you write again soon!

Add a New Comment

(Enter the numbers shown in the above image)