timevolt
Opening soon. Receipts and payments aren't open yet.
Timevolt / Instrument calibration record
Quality / metrology

Preserve the calibration-certificate version with its instrument identifier, reported results and supporting record references.

Preserve the calibration-certificate version with its instrument identifier, reported results and supporting record references. Keep your original source records together, then date the exact files. It does not calibrate equipment, establish accuracy, authenticate the laboratory, demonstrate measurement traceability or grant accreditation.

Try a file locally

Your photos and files stay on your device, so keep them.

EXAMPLE
Instrument calibration record
1 Nov 2026
Authority time: 14:02 UTC · example
Bitcoin block time: 14:10 UTC · example
Last checked: 15:02 UTC · example
✓ Dated◆ Permanent
Now keep it safe: three things
  1. Keep your photos and files unedited. The receipt only matches the originals. Put them in an album such as “My records”.
  2. Save this receipt to your camera roll.

    Keep the receipt file too. The image is a handy copy; checking needs the file.

  3. Email it to yourself.Email it to myself

    Your mail app opens a draft. Attach your receipt image and receipt file. Don’t attach your photos or documents. Timevolt does not send it or know whether it was sent.

Your record, one step at a time.

Your photos and files stay on your device, so keep them.

Local preview: files are fingerprinted here. Notes and progress stay in this browser. Keep downloaded copies; browser storage is not a backup.

0 items
How?

Add the exact original files for this part of the record. Keep them unchanged; a different export or edit has a different fingerprint.

Add link and screenshots

The link is recorded, not fetched or verified.

    0 items
    How?

    Record the date, time, place and who you spoke to. New notes are saved separately rather than editing an old note.

    How to keep notes that hold up
    Write it down

    By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.

      By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.

      How to keep notes that hold up

      Write notes as soon as you can. Keep the original account rather than replacing it later; the venue decides what weight it gets.

      1. Write it down straight away, on paper or in the box on a step.
      2. Put the date, time and place at the top, and who you spoke to.
      3. Use their words where you can; separate what you saw from what you were told.
      4. Sign or initial a paper note, photograph it and add the photo.
      5. Never edit an old note. Add a new dated entry when something changes. A device save time is not independent time evidence or proof of event order.
      Instrument calibration record
      Instrument calibration record

      01 · Keep the exact files

      Keep the original files for instrument calibration record. Include any existing photos, signed records and source-system exports.

      Records to keep: Calibration certificate and control-chart data file

      Instrument calibration record

      02 · Date the file’s code

      Your device fingerprints the selected file or manifest. Dated follows an independent timestamp; Permanent follows Bitcoin anchoring.

      An independent time, tied to the exact bytes.

      Instrument calibration record

      03 · Keep the evidence

      Keep the original files and complete receipt separately, alongside any existing venue, signature and workflow records.

      Keep the originals too. A changed or compressed copy has a different fingerprint.

      Try a file. It stays here.

      Make a test receipt on this device.

      By making a receipt you agree to the Terms and Privacy Policy. The Bitcoin record is permanent.

      or drop a file here

      Real cases: why the saved copy matters.

      Real cases where dated records mattered. We don’t claim a time receipt would have changed the result.

      US federal — Eastern District of Pennsylvania · 2024

      Calibration claims must match the checks performed

      Two testing staff made false papers about equipment checks and sent them to nuclear plant owners. Both pleaded guilty and later faced sentencing hearings. The official report said plea deals barred them from covered nuclear work.

      Summarized on Oct 29, 2026

      Read the source ›
      US federal — nuclear licensed supply chain · 2024

      False certificates can lead to required controls

      False test-equipment papers led to a case against a firm, linked to its staff's guilty pleas. The firm agreed to checks, audits and training. The order made those promised fixes take effect at once.

      Summarized on Oct 29, 2026

      Read the source ›
      US federal — Pennsylvania medical-device manufacturing · 2026

      Keep calibration reports with past test results

      The FDA said a key test tool had never been checked for accuracy. Required reports were missing. Its warning asked for fixes and a review of past results.

      Summarized on Oct 29, 2026

      Read the source ›

      What courts, schemes and regulators say.

      Positions below refer to the cited rule or record type, not endorsement of Timevolt. This service is not represented as an eIDAS qualified timestamp provider. A non-qualified timestamp does not receive the qualified timestamp presumption.

      Needs something else · United States — NIST measurement policy

      National Institute of Standards and Technology

      Metrological traceability policy and FAQ

      Measurement traceability needs a documented chain of calibrations and uncertainty. NIST says its calibration does not automatically certify later user results; a file's timestamp is not that chain.

      Source summary as of 2026-10-29. Check the current source and applicable local rules.

      Read the source
      Silent · United States — general NIST calibration guidance

      National Institute of Standards and Technology

      Recommended calibration interval

      NIST generally prescribes no fixed recalibration interval. Application, contract/regulation, stability and environment matter. The guidance does not approve independent time receipts.

      Source summary as of 2026-10-29. Check the current source and applicable local rules.

      Read the source
      Needs something else · US federal — drug-product equipment within part 211 scope

      FDA current good manufacturing practice rule

      21 CFR 211.68(a)

      Covered equipment must be routinely calibrated, inspected or checked under a written program and written records maintained. This drug-product provision is not a blanket rule for all instruments or a substitute for medical-device requirements.

      Source summary as of 2026-10-29. Check the current source and applicable local rules.

      Read the source

      Other ways to do this

      Prices change. Check each provider’s site for current prices and service details.

      • GAGEtrak

        Schedules calibrations and manages instruments, certificates and labels.

        Visit site

      • GageList

        Provides cloud calibration records and instrument management.

        Visit site

      • Gaugelog certificate workbook

        Provides a workbook for calibration-certificate records.

        Visit site

      Related workflows.

      Quarterly user access review: the reviewer list, decisions and removals frozen as submittedAccess or license request, manager approval and grantQuarterly user access review: the list shown to the reviewer, each keep/remove decision and proof removals happenedHuman-in-the-loop approval before an AI agent executes a high-impact action (refund, payment instruction, production change, customer message)Who was physically present at a members' or condo board meetingHuman-made process record

      Proves / Doesn’t prove

      Proves

      A completed time receipt shows that the exact selected file existed by the independently witnessed time. You can check whether a later copy has the same bytes. It does not establish creation time, authorship, identity, event order, location or the truth of the contents.

      Doesn’t prove

      It does not calibrate equipment, establish accuracy, authenticate the laboratory, demonstrate measurement traceability or grant accreditation.

      It does not calibrate equipment, establish accuracy, authenticate the laboratory, demonstrate measurement traceability or grant accreditation.

      These are the bounds of a completed proof. The local tester does not establish any time. The chosen court, scheme or regulator decides what to accept.

      Questions, answered plainly.

      Your file stays on your device. During normal receipt creation, your device sends a randomized code made from its fingerprint, plus encrypted recovery data. It doesn't send the plain fingerprint or the random value that opens the code. Keep the original file and the complete receipt for checking. Privacy Policy.

      Does a dated certificate establish accurate measurements?

      No. NIST separates traceability and fitness for purpose and says its own calibration does not automatically certify later user results. A receipt dates only certificate bytes.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Does every instrument need annual calibration?

      NIST generally sets no universal recalibration interval. Relevant requirements, stability, environment and measurement needs affect the interval.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Is a laboratory name enough to establish traceability?

      NIST describes traceability as a property of a measurement result supported by a documented calibration chain and uncertainty. A name or logo alone does not supply that evidence.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Does this replace the required calibration record?

      No. For equipment within the cited drug-manufacturing rule, a written program and written check/inspection records remain required. Dating an incomplete file does not fill its gaps.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer
      Can a free workbook become an accredited certificate?

      The opened template provider explicitly says its in-house workbook does not replace an accredited laboratory certificate where one is required. A time receipt does not change that.

      Source summary as of October 30, 2026. Check the current source and its scope.

      Context for this answer

      The file tester runs on your device. It does not issue a timestamp or take a payment.

      Keep the records you already have.

      Keep your original files and any existing official records while the receipt service is being prepared.