Temperature Probe Placement and Calibration for Cold Stores

Use the working record

Download the editable worksheet. Record the actual evidence and responsible reviewer against each relevant row. The empty results are inputs for your project, not completed tests. Add the equipment identity, operating period and reference method before assigning an outcome. Retain unsuccessful checks and the evidence from any repeat after correction.

Begin with the quality decision

Identify the product, process stage and question the observation must support. A room-control reading, a storage-risk indicator and a product-release measurement can require different methods. The quality owner should approve that relationship before the installer selects convenient mounting positions.

Record the relevant room arrangement, loading pattern, doors and refrigeration equipment. A position that represents one layout may become unsuitable after racks or airflow change. Keep the accepted location tied to the actual arrangement rather than treating the room name as a sufficient description.

Distinguish mapping from ongoing monitoring

A mapping exercise investigates spatial and temporal variation under stated conditions. Ongoing monitoring follows selected points after the measurement plan is established. The mapping method, number of observations and operating scenarios should be chosen for the room and decision by the responsible specialist.

Retain the mapping findings that justify the monitoring positions. A generic diagram or arbitrary sensor count cannot demonstrate coverage of every store. If the initial scope uses a limited trial, record its conditions and the further work needed before extending the interpretation to other loading or seasonal conditions.

Describe what each probe represents

Air measurements can respond quickly to changes near the probe. A buffered reference or product measurement can have a different response and purpose. Label those observations separately and use the customer's approved method to interpret them. A smooth trace from one type should not silently substitute for the evidence required from another.

Record probe construction, range, response information and relevant environmental suitability from the actual documentation. Cleaning, condensation, mounting and cable arrangements may affect the installation. The proposal should identify the selected equipment and verification method rather than rely only on a generic sensor category.

Check the installed position under real activity

Observe loading, door use, refrigeration cycles and other relevant events during the agreed trial. Preserve the exact position and orientation with photographs or a location drawing. The quality reviewer needs to know whether a short-lived change reflects a local activity or a condition relevant to the stored product.

Avoid relocating a probe simply to make an inconvenient trend look calmer. A location change should have a technical reason and approval. Keep the old and new assignments, effective time and comparison evidence so the historical record remains interpretable.

Separate calibration from an operating check

A calibration record describes the comparison performed under stated conditions, with the relevant reference and results. A routine operating check may answer a narrower question about the installed reading. Record which activity was performed, by whom and what conclusion the method supports.

The quality plan determines the appropriate review intervals and acceptance criteria. Consider the device, use, history and consequences of an incorrect reading. This guide does not set one calibration interval for every cold store. Preserve the reference identity and any uncertainty information needed for the customer's decision.

Handle a failed comparison as a record-quality event

When a probe fails the accepted check, identify the potentially affected period and the observations requiring review. Preserve the original readings with a quality flag. The responsible quality person determines how the evidence can be used and whether additional assessment of stored product is needed.

Keep correction, recalibration and replacement actions traceable. A revised offset should not overwrite the evidence of the original discrepancy. Record the new effective configuration and the verification that supports return to service. Historical corrections need a separate authorised method and audit trail.

Plan replacement before the original probe fails

Identify the spare, configuration and transition procedure. Where the approved method requires overlapping observations, retain the old and new readings and their timing. A replacement that begins at a similar value still needs identity, mapping and reference checks before its trend is treated as continuous evidence.

Update alarms, exports and maintenance records to the new device while preserving the room and historical asset relationship. The operating team should know which instrument produced each period. Keep any gap or qualified interval visible in the consignment or room record.

Accept the record beyond the dashboard

Demonstrate an export containing identity, position, acquisition time, unit, quality and relevant calibration reference. Select a normal period and a maintenance or invalid interval. The reviewer should be able to distinguish actual observations, unavailable data and any approved calculation without relying on chart appearance.

Assign ownership of position review, scheduled checks, cleaning-related inspections and replacement. A measurement plan remains reliable through controlled changes and practical local checks. The final handover should let a technician reproduce the accepted installation and let the quality owner explain what each recorded value represents.

Connect the decision to the project

Use Cold chain monitoring, Logistics to place this task within the wider installation. Bring a recent operating record and identify the decision that the proposed measurement should support. A focused discussion should establish the first boundary, the responsible site participants and the evidence needed before expanding the scope.

Agree who maintains the point register and who can change interpretation rules. Preserve the previous version when a device, product, reporting period or responsibility changes. During handover, demonstrate an export that another authorised person can reconcile without relying on the dashboard operator to explain missing fields.

Discuss the scope with addanode using the actual site information, available interfaces and proposed acceptance record.

Sources and method

The CDC storage and handling toolkit is used for measurement and record-management background. Product limits and the site quality procedure must be supplied for the actual goods; vaccine requirements are not presented as universal food-storage rules.

Frequently asked questions