---
name: load-frame-capability
title: Check What a Load Frame, Load Cell and Extensometer Can Resolve
description: Check what a servo-hydraulic or electromechanical load frame, its load cell and its strain measurement can actually resolve before treating a test result as valid at the required precision. Vendor-neutral; read the specific system's specifications and calibration records.
keywords:
- level:L1
- mechanical-testing
---

State the load frame type (servo-hydraulic vs. electromechanical) and its
control system — this determines achievable loading frequency range and
dynamic response, which matters for fatigue testing at higher frequencies or
for capturing fast transients.

Check load cell capacity and resolution against the actual loads in the
test: a load cell rated far above the test load loses resolution at the low
end, while one too close to capacity risks overload and reduces safety
margin. State the calibration status and date — an out-of-calibration load
cell invalidates the absolute accuracy of every reported load.

Check extensometer/strain-measurement range and resolution against the
expected strain in the test, and confirm gripping/alignment does not
introduce bending that biases strain readings — misalignment is a common,
often-undiagnosed source of scatter in tensile and fatigue data.

Take every capacity, resolution and calibration date from the specific
system's own specification sheets and calibration certificates, which the
scientist or the lab supplies; do not assume them from the vendor or model
name.

Return the load frame, load cell, and extensometer specification with
calibration status, and confirm each is adequate for the loads and strains
the specific test requires.