Our Motor Truck Scales

Truck scale calibration and service

Brechbuhler Scales has been in the truck scale industry since 1929. Whether you run a Centurion, portable, pit type or side rail truck scale, regular calibration keeps every weighment you bill, pay or ship accurate.

What we check on a truck scale

A truck scale calibration compares what the scale reads against known reference loads at several points across its capacity range. We also check section (shift) response by loading each part of the deck, along with repeatability and return to zero. A section test is how a weak load cell, a damaged junction box or a cable fault shows up before it becomes a billing dispute.

Each scale type has its own failure points

Pit type truck scales sit below grade, so debris and standing water under the deck can restrict movement. Side rail and Centurion truck scales depend on the deck, bearings and load cell mounts staying in good condition, whether the deck is steel or concrete. Portable truck scales depend on level, stable ground each time they are set up. Our technicians inspect the mechanical parts along with the weighing electronics.

Legal-for-trade truck scales

A truck scale used to buy or sell by weight is legal for trade and is governed by NIST Handbook 44, which most states adopt. It is normally inspected and sealed by the state or local weights and measures office. A service calibration shows how accurate your scale is and helps keep it ready for inspection, but it does not replace the official inspection.

Signs your truck scale needs attention

• The same truck weighs differently in different positions on the deck.
• The scale does not return to zero when empty.
• The weight drifts, or two weighments of the same load disagree.
• Weights changed after a lightning storm, a flood or heavy snow, or after work on the pit or foundation.
• Drivers or customers question the weights.

Truck scale calibration FAQs

How often should a truck scale be calibrated?

Many facilities calibrate annually. Heavily used scales, scales in harsh weather and scales that support high-value transactions should be calibrated more often. Your state weights and measures office and your quality system may set requirements.

What is a section test?

A section test applies a known load to each part of the deck in turn and compares the readings. If one section reads differently from the others, a load cell, mount or connection in that area may need attention.

What is the difference between calibration and a state inspection?

A calibration is a service that tests your scale and adjusts it if needed, and it produces a certificate. A state or local inspection is a regulatory check that decides whether the scale can be used for trade. Regular calibration helps the scale pass inspection.

Do we need to shut down the scale during calibration?

The scale is generally out of service while reference loads are applied, so schedule the visit for a slow period. Contact us and we will plan the visit around your traffic.

How do I get calibration certificates for an audit?

Our technicians capture calibration data in ScaleSuite, our digital certification software. Calibration certificates are available 24 x 7 through a secure website.

Learn more about how we calibrate and maintain every type of scale, or contact us to schedule a free consultation and on-site evaluation.