15 tools
Maintenance & Technician Tools
Fifteen tools for plant and field work: measurement logs, sensor and loop scaling, thermocouple and RTD conversion, PM checklists and work orders, downtime, MTBF, MTTR and OEE, spares planning and shift handovers.
About these tools
Maintenance records are site documents: readings, faults, work orders and handover notes say a great deal about a plant and about the people working on it. Every tool in this collection therefore runs in your browser, keeps nothing after you close the tab unless you export it, and produces plain CSV, JSON or printable output you can file wherever your records actually live.
The reliability figures are arithmetic on what you enter, not a forecast. MTBF from three failures is not a prediction of the fourth, and an OEE number is only as honest as the ideal cycle time behind it, so each page states the definition it uses - ISO 22400 for the manufacturing KPIs - and what the result does not prove.
Popular tasks
All Maintenance & Technician Tools
- Multimeter Reading Log Keep a structured log of field measurements - point, quantity, range, reading, unit and notes - with automatic unit handling, deviation from the expected value, out-of-tolerance flags and CSV or JSON export.
- Resistor Tolerance Checker Check measured resistance against a nominal value and tolerance class: the permitted band, the deviation in ohms and per cent, a pass or fail verdict, and the E-series value the measurement is actually closest to.
- Sensor Calibration Calculator Turn calibration points into a correction: zero offset and span gain from two points, a least-squares fit for more, the corrected reading for any raw value, and linearity, hysteresis and repeatability error as percentages of span.
- 4-20 mA Scaling Calculator Convert between loop current and engineering units for 4-20 mA, 0-20 mA, 0-10 V and 1-5 V signals: the value at any current, the current for any value, percentage of span, and what a live-zero fault current means.
- Thermocouple Temperature Converter Convert thermocouple millivolts to temperature and back for the standard types, with cold-junction compensation, the IEC 60584 polynomial coefficients used, the tolerance class limits and the usable range of each type.
- PT100 RTD Temperature Converter Convert RTD resistance to temperature and back using the IEC 60751 Callendar-Van Dusen equation for PT100, PT500 and PT1000, with tolerance class AA to C limits and the lead-resistance error of a 2-wire connection.
- Preventive Maintenance Checklist Builder Build a preventive maintenance checklist for an asset: tasks grouped by interval, the trade and time each needs, safety and isolation steps at the top, sign-off boxes, and a printable sheet plus CSV export.
- Maintenance Work Order Builder Write a complete work order in the browser: fault description, priority, isolation and permit notes, parts and labour lines with costs, time recording and a printable job card you can hand to the technician.
- Equipment Downtime Calculator Add up downtime events into the numbers a plant meeting needs: total and per-cause downtime, availability against planned running time, lost output in units, and the cost of the stoppage at your rates.
- MTBF and MTTR Calculator Calculate mean time between failures, mean time to repair, failure rate and inherent availability from run hours and failure records, with the definition of each term and what the figures do not tell you.
- Overall Equipment Effectiveness Calculator Work out overall equipment effectiveness from shift data: availability, performance and quality as defined in ISO 22400, the OEE figure itself, and the six big losses ranked so the biggest one is obvious.
- Spare Parts Consumption Calculator Turn issue history into a stocking policy: average and peak consumption, reorder point from lead time and demand variability, safety stock for a service level you choose, and the holding cost of that decision.
- Calibration Due-Date Calculator Track instrument calibration: due date from the last calibration and the interval, days remaining, overdue and due-soon flags, a sortable register for a whole department, and a calendar file for the next round.
- Shift Handover Note Builder Write a handover the next shift can actually use: plant status, work done, open jobs with owners, isolations still in place, safety concerns and outstanding permits, as a printable note or a copyable message.
- Electrical Inspection Checklist Builder Build an electrical inspection checklist for a board or installation: visual items, test items with expected values, result and observation columns, a findings summary, and a printable schedule with sign-off.
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