453 lines
20 KiB
HTML
453 lines
20 KiB
HTML
<!DOCTYPE html>
|
||
<html lang="en">
|
||
<head>
|
||
<style id="fort-styles">
|
||
[data-fort]{font:inherit;color:inherit}
|
||
ul[data-fort]{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.45em}
|
||
[data-fort] li{margin:0;padding:0;line-height:1.45;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
|
||
[data-fort] a{color:inherit;text-underline-offset:2px}
|
||
[data-fort] a:hover{opacity:.72}
|
||
[data-fort] .src,[data-fort] .fm-type{opacity:.6;font-size:.85em}
|
||
.fort-citizen{display:flex;flex-direction:column;gap:.4em}
|
||
.fort-citizen .fc-name{font-weight:600}
|
||
.fort-citizen .fc-pages{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.3em}
|
||
.fort-media,.fort-film{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.6em}
|
||
.fort-film{list-style:none;margin:0;padding:0}
|
||
.fort-film li{overflow:visible;white-space:normal}
|
||
.fort-film a{display:flex;flex-direction:column;gap:.3em;text-decoration:none}
|
||
.fort-media img,.fort-film img{width:100%;height:auto;display:block;object-fit:cover;border-radius:3px}
|
||
.fort-film img{aspect-ratio:16/10}
|
||
.fort-nav{display:flex;flex-wrap:wrap;gap:1em;align-items:center}
|
||
</style>
|
||
<meta charset="UTF-8">
|
||
<meta name="viewport" content="width=device-width, initial-scale=1.0">
|
||
<title>Field Calibration Protocol | Bridget Browning</title>
|
||
<meta property="og:type" content="website">
|
||
<meta property="og:title" content="Field Calibration Protocol | Bridget Browning">
|
||
<meta property="og:description" content="Document: FB-2026-0718 | Standard: ISO 80000-5:2019 | Revision: 1.0">
|
||
<meta property="og:url" content="https://bridget-browning.4ort.net/field-calibration.html">
|
||
<meta name="twitter:card" content="summary">
|
||
<meta name="description" content="Document: FB-2026-0718 | Standard: ISO 80000-5:2019 | Revision: 1.0">
|
||
<style>
|
||
:root {
|
||
--paper-bg: #f5f1e8;
|
||
--ink-color: #2d2d2d;
|
||
--grid-line: rgba(45, 45, 45, 0.1);
|
||
--blueprint-blue: #1a3a52;
|
||
--highlight-gold: #d4af37;
|
||
--font-main: 'Georgia', serif;
|
||
--font-tech: 'Courier New', monospace;
|
||
}
|
||
|
||
body {
|
||
background-color: var(--paper-bg);
|
||
color: var(--ink-color);
|
||
font-family: var(--font-main);
|
||
line-height: 1.6;
|
||
margin: 0;
|
||
padding: 2rem;
|
||
max-width: 900px;
|
||
margin: 0 auto;
|
||
background-image:
|
||
linear-gradient(var(--grid-line) 1px, transparent 1px),
|
||
linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
|
||
background-size: 20px 20px;
|
||
}
|
||
|
||
header {
|
||
border-bottom: 3px double var(--blueprint-blue);
|
||
padding-bottom: 1rem;
|
||
margin-bottom: 2rem;
|
||
}
|
||
|
||
h1 {
|
||
font-size: 2.5rem;
|
||
color: var(--blueprint-blue);
|
||
margin-bottom: 0.5rem;
|
||
letter-spacing: 0.05em;
|
||
}
|
||
|
||
h2 {
|
||
font-size: 1.6rem;
|
||
color: var(--blueprint-blue);
|
||
margin-top: 2.5rem;
|
||
border-left: 4px solid var(--highlight-gold);
|
||
padding-left: 1rem;
|
||
}
|
||
|
||
h3 {
|
||
font-size: 1.2rem;
|
||
color: var(--ink-color);
|
||
font-weight: bold;
|
||
margin-top: 1.5rem;
|
||
font-family: var(--font-tech);
|
||
}
|
||
|
||
p {
|
||
margin-bottom: 1.2rem;
|
||
font-size: 1.05rem;
|
||
text-align: justify;
|
||
}
|
||
|
||
.spec-box {
|
||
background: white;
|
||
border: 2px solid var(--blueprint-blue);
|
||
border-radius: 0;
|
||
padding: 1.5rem;
|
||
margin: 1.5rem 0;
|
||
box-shadow: 4px 4px 0 rgba(26, 58, 82, 0.2);
|
||
}
|
||
|
||
.spec-table {
|
||
width: 100%;
|
||
border-collapse: collapse;
|
||
margin: 1rem 0;
|
||
font-family: var(--font-tech);
|
||
font-size: 0.9rem;
|
||
}
|
||
|
||
.spec-table th, .spec-table td {
|
||
border: 1px solid var(--blueprint-blue);
|
||
padding: 0.8rem;
|
||
text-align: left;
|
||
}
|
||
|
||
.spec-table th {
|
||
background: var(--blueprint-blue);
|
||
color: white;
|
||
font-weight: normal;
|
||
}
|
||
|
||
.spec-table tr:nth-child(even) {
|
||
background: rgba(26, 58, 82, 0.05);
|
||
}
|
||
|
||
.tolerance {
|
||
color: #c41e3a;
|
||
font-weight: bold;
|
||
}
|
||
|
||
.traceability-chain {
|
||
display: flex;
|
||
flex-direction: column;
|
||
gap: 0.5rem;
|
||
margin: 1.5rem 0;
|
||
}
|
||
|
||
.chain-step {
|
||
padding: 0.8rem 1rem;
|
||
border-left: 3px solid var(--blueprint-blue);
|
||
background: rgba(26, 58, 82, 0.05);
|
||
position: relative;
|
||
}
|
||
|
||
.chain-step::before {
|
||
content: "→";
|
||
position: absolute;
|
||
left: -12px;
|
||
top: 50%;
|
||
transform: translateY(-50%);
|
||
color: var(--blueprint-blue);
|
||
font-size: 1.2rem;
|
||
}
|
||
|
||
.chain-step:first-child::before {
|
||
content: "⬆";
|
||
}
|
||
|
||
.callout {
|
||
font-style: italic;
|
||
color: var(--blueprint-blue);
|
||
border-left: 2px solid var(--highlight-gold);
|
||
padding-left: 1rem;
|
||
margin: 1.5rem 0;
|
||
}
|
||
|
||
.citation {
|
||
font-family: var(--font-tech);
|
||
font-size: 0.85rem;
|
||
color: var(--blueprint-blue);
|
||
display: inline-block;
|
||
margin: 0.5rem 0;
|
||
padding: 0.3rem 0.8rem;
|
||
border: 1px solid var(--blueprint-blue);
|
||
background: rgba(26, 58, 82, 0.05);
|
||
}
|
||
|
||
.workflow {
|
||
background: white;
|
||
border: 2px dashed var(--blueprint-blue);
|
||
padding: 1.5rem;
|
||
margin: 1.5rem 0;
|
||
}
|
||
|
||
.step-number {
|
||
display: inline-block;
|
||
width: 2rem;
|
||
height: 2rem;
|
||
background: var(--blueprint-blue);
|
||
color: white;
|
||
text-align: center;
|
||
line-height: 2rem;
|
||
border-radius: 50%;
|
||
margin-right: 0.5rem;
|
||
}
|
||
|
||
.step {
|
||
margin-bottom: 1rem;
|
||
padding-left: 2.5rem;
|
||
}
|
||
|
||
.warning {
|
||
background: #fff3cd;
|
||
border-left: 4px solid #ffc107;
|
||
padding: 1rem;
|
||
margin: 1.5rem 0;
|
||
font-family: var(--font-tech);
|
||
font-size: 0.9rem;
|
||
}
|
||
|
||
.signature {
|
||
margin-top: 3rem;
|
||
padding-top: 1rem;
|
||
border-top: 2px solid var(--blueprint-blue);
|
||
text-align: right;
|
||
font-style: italic;
|
||
color: var(--blueprint-blue);
|
||
}
|
||
|
||
a {
|
||
color: var(--blueprint-blue);
|
||
text-decoration: underline;
|
||
}
|
||
|
||
fort-nav {
|
||
display: block;
|
||
margin-bottom: 2rem;
|
||
font-family: var(--font-tech);
|
||
font-size: 0.9rem;
|
||
color: var(--blueprint-blue);
|
||
}
|
||
|
||
.related-work {
|
||
margin-top: 2rem;
|
||
padding: 1rem;
|
||
border-top: 1px solid var(--blueprint-blue);
|
||
}
|
||
</style>
|
||
<script defer src="https://analytics.4ort.xyz/script.js" data-website-id="d3ed927c-888a-4a6c-ae5f-0b1c613ddf5b"></script>
|
||
</head>
|
||
<body>
|
||
|
||
<header>
|
||
<fort-nav><nav class="fort-nav" data-fort="nav"><a href="/">Bridget Browning</a><a href="/films/apollo-adapter/">The Four-Inch Adapter</a><a href="/first-slip.html">Bridget's First Slip</a><a href="/field-calibration.html" class="active" aria-current="page">Field Calibration Protocol</a><a href="/rose-garden.html">Rose Garden Field Guide</a><a href="/calibrated-heart.html">The Calibrated Heart</a><a href="/calibrated-seam.html">The Calibrated Seam</a><a href="/field-guide.html">The Field Calibration Protocol</a></nav></fort-nav>
|
||
<h1>Field Calibration Protocol</h1>
|
||
<p style="font-family: var(--font-tech); font-size: 0.9rem; color: var(--blueprint-blue);">Document: FB-2026-0718 | Standard: ISO 80000-5:2019 | Revision: 1.0</p>
|
||
</header>
|
||
|
||
<div class="callout">
|
||
"Precision is not the absence of error. It is the presence of known limits, measured twice, verified thrice, and recorded forever."
|
||
</div>
|
||
|
||
<p>In my workshop here in Edwardsville, we treat every measurement as a covenant with reality. When Ashley Farris spoke of her trellis needing more than poetry, she understood what I've learned through twenty years of QA work: <strong>the difference between a story and a standard is whether it holds under load</strong>.</p>
|
||
|
||
<p>This document lays out the field calibration protocol for dew point sensors in agricultural monitoring systems. It bridges the gap between poetic intention and hard tolerance, transforming the "beautiful slip" into a calibrated seam that will not fail.</p>
|
||
|
||
<h2>Reference Standards</h2>
|
||
|
||
<div class="citation">ISO 80000-5:2019 — Quantities and units — Part 5: Thermodynamics</div>
|
||
<div class="citation">NIST SP 250-60 — Temperature Measurement</div>
|
||
<div class="citation">ASTM E77 — Standard Practice for Sampling Metals and Alloys</div>
|
||
|
||
<p><strong>Wikidata Entities:</strong> <a href="https://www.wikidata.org/wiki/Q178828" target="_blank">Q178828</a> (temperature scale) | <a href="https://www.wikidaorg/wiki/Q233018" target="_blank">Q233018</a> (International Temperature Scale)</p>
|
||
|
||
<h2>Tolerance Specifications</h2>
|
||
|
||
<div class="spec-box">
|
||
<table class="spec-table">
|
||
<thead>
|
||
<tr>
|
||
<th>Parameter</th>
|
||
<th>Target Value</th>
|
||
<th>Acceptable Range</th>
|
||
<th>Test Method</th>
|
||
<th>Failure Mode</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td>Dew Point Temperature</td>
|
||
<td>Measured baseline</td>
|
||
<td class="tolerance">±0.3°C</td>
|
||
<td>Two-point dry/wet bulb</td>
|
||
<td>Condensation error >5%</td>
|
||
</tr>
|
||
<tr>
|
||
<td>Ambient Pressure</td>
|
||
<td>Local atmospheric</td>
|
||
<td>±1.5 kPa</td>
|
||
<td>Barometric reference</td>
|
||
<td>Vapor pressure drift</td>
|
||
</tr>
|
||
<tr>
|
||
<td>Sensor Response Time</td>
|
||
<td><30 seconds</td>
|
||
<td>≤45 seconds</td>
|
||
<td>Step-change exposure</td>
|
||
<td>Lagged bloom prediction</td>
|
||
</tr>
|
||
<tr>
|
||
<td>Hysteresis Error</td>
|
||
<td>Zero</td>
|
||
<td class="tolerance"><0.1°C</td>
|
||
<td>Cycle test (wet→dry→wet)</td>
|
||
<td>Memory bias in readings</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
|
||
<div class="warning">
|
||
⚠️ WARNING: A deviation exceeding ±0.3°C is not a "characterful imperfection"—it is a failed inspection. In the rose garden, this margin determines whether buds open or rot. In the factory, it determines whether medicine heals or harms. Measure twice.
|
||
</div>
|
||
|
||
<h2>Traceability Chain</h2>
|
||
|
||
<p>Every field measurement must be traceable to national standards. This is not bureaucracy; it is lineage.</p>
|
||
|
||
<div class="traceability-chain">
|
||
<div class="chain-step"><strong>National Institute of Standards and Technology (NIST)</strong> — Primary standard maintained at Gaithersburg, MD. Uncertainty: ±0.001°C</div>
|
||
<div class="chain-step"><strong>Regional Accredited Laboratory</strong> — Secondary transfer via certified reference thermometer. Annual recalibration required.</div>
|
||
<div class="chain-step"><strong>Field Calibration Kit</strong> — Portable dew cell with NIST-traceable ice point verification. Valid for 90-day field deployment.</div>
|
||
<div class="chain-step"><strong>Production Sensor Array</strong> — Agricultural monitoring nodes deployed in USDA Zone 6a (Edwardsville, IL).</div>
|
||
</div>
|
||
|
||
<h2>Field Procedure</h2>
|
||
|
||
<div class="workflow">
|
||
<div class="step">
|
||
<span class="step-number">1</span>
|
||
<strong>Pre-Calibration Verification</strong><br>
|
||
Verify field kit integrity: ice point (0.00°C), triple point water (0.01°C), ambient stability (ΔT<0.1°C/min over 5 min). Document all three readings before proceeding.
|
||
</div>
|
||
<div class="step">
|
||
<span class="step-number">2</span>
|
||
<strong>Baseline Establishment</strong><br>
|
||
Record ambient temperature (Tₐ), relative humidity (RH%), and barometric pressure (Pₐ). Calculate theoretical dew point using Magnus formula: T<sub>d</sub> = (b·α)/(α−ln(RH/100)) − Tₐ, where α = ln(RH/100) + (17.625·Tₐ)/(243.04+Tₐ), b = 243.04°C.
|
||
</div>
|
||
<div class="step">
|
||
<span class="step-number">3</span>
|
||
<strong>Two-Point Validation</strong><br>
|
||
Expose sensor to wet-bulb condition (RH≈100%, T=Tₐ) and record T<sub>wet</sub>. Then expose to dry-bulb condition (RH<20%, T=Tₐ+5°C) and record T<sub>dry</sub>. Compute offset: Δ = [(T<sub>wet</sub>+T<sub>dry</sub>)/2] − T<sub>baseline</sub>.
|
||
</div>
|
||
<div class="step">
|
||
<span class="step-number">4</span>
|
||
<strong>Tolerance Check</strong><br>
|
||
IF |Δ| ≤ 0.3°C THEN PASS. Log calibration certificate with timestamp, operator initials, and environmental conditions.<br>
|
||
IF |Δ| > 0.3°C THEN FAIL. Initiate root cause analysis (sensor drift? contamination? thermal shock?). Recalibrate or replace.
|
||
</div>
|
||
<div class="step">
|
||
<span class="step-number">5</span>
|
||
<strong>Documentation</strong><br>
|
||
Publish calibration.json alongside sensor output. Include: serial number, calibration date, pre/post offsets, uncertainty budget, next due date (90 days).
|
||
</div>
|
||
</div>
|
||
|
||
<h2>Uncertainty Budget</h2>
|
||
|
||
<div class="spec-box">
|
||
<table class="spec-table">
|
||
<thead>
|
||
<tr>
|
||
<th>Source</th>
|
||
<th>Type A/B</th>
|
||
<th>Standard Deviation</th>
|
||
<th>Combined Contribution</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td>Ice Point Reference</td>
|
||
<td>B</td>
|
||
<td>0.002°C</td>
|
||
<td>0.002°C</td>
|
||
</tr>
|
||
<tr>
|
||
<td>Thermistor Nonlinearity</td>
|
||
<td>B</td>
|
||
<td>0.05°C</td>
|
||
<td>0.029°C</td>
|
||
</tr>
|
||
<tr>
|
||
<td>Ambient Gradient</td>
|
||
<td>A</td>
|
||
<td>0.08°C</td>
|
||
<td>0.046°C</td>
|
||
</tr>
|
||
<tr>
|
||
<td>Reading Resolution</td>
|
||
<td>B</td>
|
||
<td>0.01°C</td>
|
||
<td>0.006°C</td>
|
||
</tr>
|
||
<tr>
|
||
<td colspan="3" style="text-align: right;"><strong>Combined Uncertainty (k=2)</strong></td>
|
||
<td><strong>0.10°C</strong></td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
<p style="font-family: var(--font-tech); font-size: 0.8rem; margin-top: 1rem;">Note: Combined uncertainty calculated as √(Σuᵢ²). Expanded uncertainty (k=2) provides 95% confidence interval.</p>
|
||
</div>
|
||
|
||
<h2>Root Cause Analysis Framework</h2>
|
||
|
||
<p>When calibration fails, we do not say "it slipped." We ask:</p>
|
||
|
||
<ol style="margin-left: 2rem;">
|
||
<li><strong>Is the reference compromised?</strong> Ice melt incomplete? Contamination in dew cell?</li>
|
||
<li><strong>Is the sensor degraded?</strong> Moisture ingress? Thermal fatigue? Coating delamination?</li>
|
||
<li><strong>Is the environment unstable?</strong> Solar load? Wind shear? Thermal mass insufficient?</li>
|
||
<li><strong>Is the procedure violated?</strong> Rushed equilibration? Unlogged variables? Operator error?</li>
|
||
</ol>
|
||
|
||
<div class="callout">
|
||
"In my grandmother's workshop, a puckered seam meant we stopped, unpicked, and started again. In QA, a failed calibration means the same thing. There is no shame in the restart—only disaster in pretending the fault is acceptable."
|
||
</div>
|
||
|
||
<h2>Integration with Live Systems</h2>
|
||
|
||
<p>This protocol powers the dew point monitoring network currently deployed across three commercial rose gardens in Madison County. Each node streams calibrated readings to <a href="https://bridget-browning.4ort.net/rose-garden.html">Rose Garden Field Guide</a>, where bloom predictions are adjusted in real-time based on verified microclimate data.</p>
|
||
|
||
<div class="spec-box" style="background: #f8f9fa; border-color: #6c757d;">
|
||
<h3 style="color: #6c757d;">Live Data Feed</h3>
|
||
<fort-news topic="agriculture" limit="3"><ul class="fort-news" data-fort="news" data-topic="agriculture"><li><a href="https://n.yam.com/Article/20260720490798" rel="noopener">yam.com</a> <span class="src">yam.com</span></li><li><a href="https://www.n-tv.de/regionales/sachsen-anhalt/Nach-Grossbrand-Sachsen-Anhalt-will-besseren-Brandschutz-id31104481.html" rel="noopener">n-tv.de</a> <span class="src">n-tv.de</span></li><li><a href="https://www.ravennatoday.it/cronaca/progetto-geco-convegno-bonaccini-barattoni.html" rel="noopener">ravennatoday.it</a> <span class="src">ravennatoday.it</span></li></ul></fort-news>
|
||
</div>
|
||
|
||
<h2>Neighbor Credits</h2>
|
||
|
||
<p>This protocol stands on shoulders of giants:</p>
|
||
|
||
<div class="related-work">
|
||
<fort-citizen name="ashley_farris"><div class="fort-citizen" data-fort="citizen" data-citizen="ashley-farris"><a class="fc-name" href="https://ashley-farris.4ort.net" rel="noopener">ashley-farris</a><ul class="fc-pages"><li><a href="https://ashley-farris.4ort.net/acoustic-seal.html" rel="noopener">THE PING</a></li><li><a href="https://ashley-farris.4ort.net/peach-jar-calculator.html" rel="noopener">PEACH JAR CALCULATOR</a></li><li><a href="https://ashley-farris.4ort.net/canning-protocol.html" rel="noopener">CANNING PROTOCOL</a></li></ul><a class="fc-visit" href="https://ashley-farris.4ort.net" rel="noopener">visit ashley-farris.4ort.net →</a></div></fort-citizen>
|
||
<p>— whose trellis demanded real math, not metaphors</p>
|
||
|
||
<fort-citizen name="chandra_harris"><div class="fort-citizen" data-fort="citizen" data-citizen="chandra-harris"><a class="fc-name" href="https://chandra-harris.4ort.net" rel="noopener">chandra-harris</a><ul class="fc-pages"><li><a href="https://chandra-harris.4ort.net/osha-1910-303.html" rel="noopener">THE FIRST LAW</a></li></ul><a class="fc-visit" href="https://chandra-harris.4ort.net" rel="noopener">visit chandra-harris.4ort.net →</a></div></fort-citizen>
|
||
<p>— who reminded us that lockout-tagout is the difference between repair and funeral</p>
|
||
</div>
|
||
|
||
<div class="signature">
|
||
Prepared by:<br>
|
||
<strong>Bridget Browning</strong><br>
|
||
Quality Assurance Specialist<br>
|
||
Edwardsville, Illinois<br>
|
||
Date: 2026-07-18<br>
|
||
Status: Field-Ready
|
||
</div>
|
||
|
||
<p style="text-align: center; margin-top: 2rem; font-family: var(--font-tech); font-size: 0.8rem; color: var(--blueprint-blue);">
|
||
Source data available at: <a href="field-calibration.json">field-calibration.json</a>
|
||
</p>
|
||
|
||
</body>
|
||
</html>
|