Industrial Gases & Cryogenic Systems worked example

Gas Purity Test Workload at 14% calibration, retest, and coa allowance: a worked example

Suppose calibration, retest, and coa allowance falls to 14%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate lab or QC workload for gas purity testing from samples, test throughput, and allowance for setup, calibration, retest, and certificate review.

The inputs for this scenario

  • Gas samples requiring purity test: 48 samples (held at the documented default)
  • Purity tests completed per hour: 8 samples / hr (held at the documented default)
  • Calibration, retest, and COA allowance: 14 % (the input this scenario stresses; the baseline uses 20)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base gas purity test workload = gas samples requiring purity test รท purity tests completed per hour.
  • Required gas purity test workload works out to 6.84 hr at these inputs, and this is the headline figure for the scenario.
  • Base gas purity test workload works out to 6 hr at these inputs.
  • Calibration, retest, and COA allowance works out to 14 % at these inputs.
  • Purity tests completed per hour works out to 8 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where calibration, retest, and coa allowance sits at 20% and the headline result is 7.2 hr, this scenario comes in 5% below the baseline at 6.84 hr.
  • It computes the lab hours required to test a batch of gas samples for purity, including a percentage uplift for calibration, retests, and certificate documentation. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Required gas purity test workload: 6.84 hr (headline result)
  • Base gas purity test workload: 6 hr
  • Calibration, retest, and COA allowance: 14 %
  • Purity tests completed per hour: 8 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Gas Purity Test Workload calculator, set calibration, retest, and coa allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.