What is the difference between an analytical balance and a precision balance?

An analytical balance provides readability of 0.1 mg or better, while a precision balance typically reads to 0.001 g or 0.01 g. Analytical balances include draft shields and are designed for highly sensitive measurements. Precision balances handle larger samples and are less affected by environmental conditions.

What readability do I need for my lab application?

You need a readability that is at least one-tenth of your smallest sample weight or required measurement increment. For example, measuring 100 mg samples may require 0.01 mg readability, while gram-level work may only need 0.01 g. Selecting higher readability than necessary increases cost without improving results.

Do lab balances need to be calibrated?

Yes, all lab balances require regular calibration to maintain accuracy. Calibration ensures measurements remain traceable to certified standards. Internal calibration simplifies this process by automating adjustments, while external calibration requires manual verification with certified weights. In regulated environments, calibration records must be documented and retained.

What is the difference between readability and repeatability?

Readability is the smallest increment of weight a balance will display. Repeatability is the degree of agreement between multiple measurements of the same mass, on the same balance, under the same conditions.

What is the best way to clean my balance to ensure accurate readings?

Inspect and clean before each use. A flannel cloth or soft brush works well for dusting and light cleaning. Use a non-abrasive cleaner for light spills, and a dry flannel cloth for glass parts. Set a regular maintenance schedule for deep cleaning to ensure optimal performance and instrument longevity.

Can vibration affect the accuracy of my balance?

Yes — even slight vibration from a heavy footstep can affect accuracy. Place the balance on a sturdy benchtop away from high-traffic areas such as hallways, elevators, stairways, and doors. If that placement is not possible, an anti-vibration table should be considered.

Ask The Tech Experts at Cole-Parmer.com

Cole-Parmer is well known for its technical expertise. We only hire the top tech experts. Let’s see what’s happening with one of our tech experts, Charlsie.

“If you need help with agar recommendations, I’m your girl!” said tech expert Specialist Charlsie. With a stint as a microbiologist and a degree in biology, Charlsie has developed specific areas of expertise. “I am also the go-to person for anything micro,” she added.

Charlsie thrives on variety—and the customers she interacts with are happy to supply it. “One customer was seeking to remove mites from his bear. I thought he had a live pet bear but it turns out it was a large stuffed bear,” she said. “We recommended a UV light that would work for him.”

This was only one of the many challenges Charlsie responds to. “Every day I receive e-mails from all around the world. I love it when I can answer a question but also add something extra that may help the user even more. I believe educating customers about the theory behind their product will better equip them to use it,” she said.

Off-hours, Charlsie loves to channel her enthusiasm into support for the Utah Jazz, NBA basketball, and her church community.

Get your questions answered by our knowledgeable tech experts. Call 1-800-323-4340. It’s free!

Ask the Tech Expert: Charlsie

Be the first to comment on "Ask the Tech Expert: Charlsie"

Leave a comment Cancel reply