Reconcile aggregate catch-can volume, collector geometry and runtime with a comparison sprinkler precipitation rate.
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Reconcile one zone’s aggregate catch-can volume, collector opening area and runtime with an independently recorded precipitation rate.
Reproduce average catch volume, depth and precipitation rate from the aggregate record.
Enter total catch, collector count, throat area, runtime and the comparison rate.
Sees the signed comparison and can trace the unit conversion.
Know that aggregate volume cannot recover low-half or low-quarter uniformity.
Retain every individual catch and compute uniformity with the complete grid outside this aggregate check.
Does not infer DU from one total.
Avoid turning one measured rate into an automatic schedule.
Review wind, pressure, nozzle/head condition, infiltration/runoff, plant water need and current weather separately.
Does not accept runtime advice from the arithmetic alone.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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Divide total collected milliliters by the whole collector count. Divide that average volume by 16.387064 cubic centimeters per cubic inch and by the entered opening area to obtain average caught depth in inches.
Multiply average caught depth by 60 and divide by the zone runtime in minutes. Subtract the entered field or independently calculated comparison rate and retain the direction of the difference.
An aggregate total cannot reproduce low-quarter or low-half distribution uniformity. Keep every individual catch, collector grid, wind, pressure, nozzle condition and overlapping-zone runtime with the audit.
Updated: August 2026
A technician independently reproduces the zone-average precipitation rate from an aggregate catch-can record.
An auditor checks that the level throat/opening area and runtime—not a container base or nominal head spacing—drive the conversion.
A manager compares matched zone audits while retaining the individual catches needed to interpret distribution changes.
Use a representative catch-can audit for actual zone delivery, or keep a specification calculation explicitly separate from measured performance.
Retain every value. The aggregate supports average precipitation, but distribution uniformity depends on the sorted individual measurements.
This worksheet reproduces one zone-average catch-can precipitation rate from measured volume, collector opening area and runtime. It does not infer application uniformity or recommend a runtime.