My LoopCal

Convert, verify, and document 4–20 mA instrument loops in seconds — direct or reverse, linear or square root — completely offline.

LoopCal is a fast, fully offline field toolkit for instrumentation and calibration technicians who work with 4–20 mA current loops and analog process signals.

CONVERT INSTANTLY • 4–20 mA, 0–20 mA, 0–10 V, 1–5 V, and your own custom signal endpoints • Direct-acting and reverse-acting ranges • Linear and square-root (flow) transfer functions • Engineering ranges with any unit, including negative and offset spans • Percent, signal, and engineering values update as you type, with the substituted formula shown

VERIFY AND DOCUMENT • Three-point, five-point, and custom 2–21-point checks • As-found and as-left runs with immediate error and pass/fail • Percent-of-span, signal-unit, or engineering-unit tolerance basis • Worst-point and maximum-error summaries

LOOP POWER MATH • Shunt resistor voltage drop • Required supply voltage and remaining compliance • Maximum loop and wire resistance

ORGANIZE AND SHARE • Save instruments, ranges, and history • Due-date reminders • PDF and CSV field worksheets with your company identity

PRIVATE BY DESIGN • Everything runs on your device. No account, no ads, no tracking, no network.

LoopCal is a calculation aid and field worksheet — not a calibrator, an accredited calibration service, or a replacement for manufacturer procedures. Always follow site lockout/tagout, operations authorization, device manuals, and approved procedures.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/