Cold-chain probe log: seventeen probe tips before the cooler seals

Cold-chain close is a probe tip log, not a hand on the door. Seventeen probe tips get a written line before the cooler seals. Miss a line and the night lead keeps the radio.

The log hangs on a clip inside the cooler vestibule. Header lists T1 through T17. Those codes match the physical probe slots on the rack, not wishful nicknames. If a slot is retired, reprint the header the same day.

Walk the tips in order

Start at T1 with a dry pen and a charged light. Read the display once. Confirm the tip is seated, the cable is undamaged, and the reading is in range. Write three short marks. Move. Do not rewrite essays at T1 while T17 waits behind a pallet.

Each line needs: tip seated (yes/no), cable intact (yes/no), reading in range (yes/no). Add one extra word for trouble — drift, fray, open — then keep walking. Full incident detail goes on the red cold-chain pad, not on this log.

Radio “probe log complete” only after T17. Then seal the cooler. Sixteen lines with a blank seventeenth is a failed log. The far rack loves hiding an open tip.

Empty slots still get a line. Write EMPTY plus the code. Erasing a row because “that product never ships tonight” is how blind corners return. Tagged-out probes get OOS plus the work-order number.

Cost of a blank probe line

Blank is not later. Blank is an unread tip. Morning then finds a drifted reading, a frayed cable, or an open connector, and the day crew debates who left the mess. The log ends that debate.

A missing T11 once delayed an outbound chilled load. A missing T4 once hid a tip left hanging in air. Both needed one honest line, not a meeting.

When the problem is real, the log still helps. You can show which tips were checked and which were not. That narrows the window instead of blaming the whole cooler.

Where this log sits with the other night boards

This cold-chain probe log is separate from the extinguisher tag board, the shrink-wrap seal card, and the pallet jack check. Same discipline, different surface: write before you claim sealed.

When quality wants a week of cooler photos as one clean PDF for review, we merge the phone shots in tip order instead of dumping a chat thread. A quick merge on pdfmergefiles.com keeps T1–T17 readable. Put the date and “T1-T17” in the filename so nobody hunts a chat scroll.

Keep the physical logs thirty days even after you photo them. Auditors like a dated paper trail more than a gallery.

Failure modes we keep killing

Yesterday’s log left on the clip. Skipping far tips in a hurry. Phone photos instead of written marks. Clipboard left on a forklift seat. Each one seals the cooler while a tip stays unread.

Fix stays dull: clipboard on the vestibule hook, today’s date stamp, T1→T17 in order, radio only after T17.

Another quiet failure is rewriting marks after the radio call. If you need a second look, walk again before you claim complete. Do not invent a cleaner page at the desk.

Teaching the next night lead

Night one: they write, you watch. Night two: they walk alone, you check the log before seal. Night three: they own the radio call. Seal authority waits until that sequence holds.

Neat identical “yes” marks copied from memory fail harder than messy honest ones. Send them back out. Have them point at each tip while reading the line aloud.

If they say seventeen is too many, recount the slots together. Fewer slots means a new header the same day. Seventeen slots means seventeen lines.

Morning handoff

Day shift reads seventeen lines before the first chilled pick. No standup required. “Drift” means start there. Clean log still gets a glance at T17.

Binder archive for thirty days. Photo if the binder is full. Merge photos when quality asks for a week. Always merge in T1 order.

Scope we refuse

No cooler Wi-Fi tablets that die in the cold. No QR scavenger hunts on wet floors. No thirty-page probe SOP at 23:50. Seventeen tips, three fields, one radio call.

Permanent slot removal means reprint the header the same day. Invented T18 gets stopped. Scope creep kills the log faster than laziness.

Last soft check

Say T1 through T17 aloud. A skipped code means skipped feet. Then seal.

Safer seals come from seventeen written tip lines, not from hoping the cooler felt cold. Fill the log, then seal.