Commission calibration with the right measuring scope
A calibration certificate is useful when the instrument, measurement points and application match. Define the devices, the ranges actually used and the purpose of the results. Adjustment, repair or statutory verification is not automatically included in calibration.
Distinguish calibration, adjustment and statutory verification
Calibration determines deviations against a reference; adjustment changes the device setting. Legally regulated instruments may require separate statutory verification, depending on their type and use. Agree the required service rather than treating a calibration certificate as a replacement for every legal check.
| Service | Expected output |
|---|---|
| Calibration | Document values and uncertainty |
| Adjustment | Change settings; agree measurements afterwards |
| Statutory verification | Clarify applicability and competent body separately |
Identify instruments and measuring ranges
Give the exact instrument count and known manufacturers and models. For different devices, one list with quantities per type is sufficient. The measured quantity, working range, accessories and requested points help the laboratory plan. If points are not yet defined, describe the use and request a suitable proposal.
Check evidence and accreditation scope
State known customer or quality requirements without attaching confidential records to the initial request. Where accredited calibration is needed, the particular work must fall within the performing laboratory’s scope. A general accreditation statement does not cover every instrument. Agree the certificate language and any assessment against your tolerances with a defined decision rule.
Compare laboratory, on-site work and downtime
Portable instruments can often be shipped; installed sensors and large testing machines need different arrangements. Ask whether removal is necessary and who handles it. On-site work needs agreed access, environmental conditions and a usable time window. In-place calibration is not available for every device or range.
Record condition before and after interventions
If a device falls outside your requirements, adjustment or repair should require your approval. Agree extra costs and preservation of initial readings. Further calibration may be needed after changes. Before-intervention results matter when reviewing earlier measurements; that assessment belongs to your quality process.
Compare the same scope and total costs
Count alone does not explain the price. Quantity measured, measurement points, evidence, handling and downtime change the work. Check shipping, travel, removal, cleaning and repeat measurements separately. Identify items that can only be confirmed after inspecting the device. One instrument price is not a general Swiss calibration tariff.
| Item | Define before comparison |
|---|---|
| Measurement | Same devices, ranges and points |
| Documentation | Evidence type, language and assessment |
| Logistics | Shipping or travel, removal and downtime |
Agree preparation, work and return
Prepare a short instrument list and known requirements. The provider then confirms feasibility, scope, handling of deviations and timing. Agree clean, safe handover and accessories; for shipping, include packaging and return arrangements. On return, check device identification, agreed measurement points and complete evidence. Set the next date according to use, results and requirements rather than a blanket annual rule.
Frequently asked questions
What belongs in the initial request?
Count, type and model, working range, evidence and laboratory or on-site preference. The provider can propose unresolved technical details.
Is calibration the same as statutory verification?
No. Any required statutory check must be clarified separately for the device and its use.
Is accredited calibration always necessary?
It depends on the particular evidence requirements. Where required, the performing body must cover the relevant measuring scope.
Is a device automatically adjusted?
Not without agreement. Define approval, extra cost and before-and-after results.
Can every device be calibrated on site?
No. Method, range, installation and environment determine feasibility, which the provider must check.
How often should calibration be commissioned?
Intervals depend on use, stability, results and specific requirements. A supplier recommendation for one device type is not a universal annual legal deadline.
