A connector vibration pass is useful only when the report identifies what was mounted, how it was supported, which circuits were monitored and what counted as an electrical interruption. Before accepting a quotation, match those conditions to the intended assembly. A resistance measurement taken after vibration cannot establish that every circuit remained connected throughout the exposure.
The procurement decision is therefore about evidence coverage. A buyer needs a defined mating pair, an installation drawing, an approved exposure and a monitoring record linked to the same specimens. A standard number and a photograph of a shaker do not supply that chain.
This guide concerns supplier evidence review for separable connectors and their installed harness interfaces. It does not prescribe a vibration severity, a universal allowable interruption duration or a live high-energy test. Engineering should approve the exposure and electrical acceptance criteria; a competent laboratory should determine and document the test implementation.
Separate three questions hidden inside a vibration claim
The first question is mechanical: did the specified assembly remain physically intact and secured during the exposure? The second is dynamic electrical continuity: did the monitored path cross a defined electrical threshold for a defined duration while the exposure was running? The third is residual condition: what changed in contact resistance, retention or appearance afterward?
These questions can have different evidence. A final photograph can support an appearance assessment but cannot reconstruct an unrecorded interruption. A post-test resistance result can reveal persistent deterioration without capturing a brief event that ended earlier. An event log can identify interruptions without explaining whether the mating interface, a termination or a measurement lead caused them.
TE's SGI 2.0 product specification, 108-106266 Rev A1 illustrates the distinction. It includes a product-specific sinusoidal vibration requirement addressing interruptions of one microsecond or longer, while low-level contact resistance appears as a separate test in the qualification sequence. Those requirements belong to that connector system and document; they are not a default acceptance limit for every harness.
Use the dry-circuit contact-resistance guide for the separate baseline measurement question. Keep both records when both are required, rather than relabeling one as proof of the other.
Freeze the complete specimen before comparing reports
Identify both connector halves and their revisions, contacts, plating options, wire sizes, seals, secondary locks and backshells. Include the populated cavity map and the state of every latch. A family name can cover several arrangements that transfer mechanical loads differently.
Describe whether the specimen is a free harness connection, a panel-mounted pair, a board connection or an assembly with one fixed and one cable-supported half. Record the relevant board, panel or bracket identity. Calling all four arrangements the same connector test conceals the installation boundary.
Sample preparation also matters. Record termination tooling, assembly inspection, intentional mating operations and any environmental conditioning already performed. These are traceability fields, not instructions to add conditioning arbitrarily. The approved sequence should determine which specimens represent new production and which represent a defined aged condition.
For an assembly containing several connections, assign a specimen identifier at each physical interface. A single harness serial number is useful, but the report must still make clear which connector pair and cavity map its conclusions cover. Preserve the relationship between purchased parts, assembled specimen and returned data.
The housing, contact and keying guide helps establish the mating-system identity. Vibration evidence adds the installed configuration and monitoring boundary to that foundation.
Make the mounting and cable-support drawing reviewable
Request a dimensioned fixture drawing showing fasteners, panel or board attachment points, connector orientation and the first cable-support locations. Show unsupported cable lengths, branch locations, attached accessories and the direction in which each cable exits. A photograph can supplement the drawing but rarely establishes hidden dimensions or material details.
The purpose is to compare the offered evidence with the intended installation. A report using a short, closely clamped cable does not automatically cover a longer unsupported branch. Conversely, a different support arrangement is not automatically worse. The responsible engineer should decide whether the difference is covered, requires analysis or needs additional evaluation.
Distinguish the shaker's input reference from the specimen's attachment points. Ask where the laboratory controlled the exposure and how the fixture was documented. This prevents a purchasing summary from treating an equipment setting as a complete description of the mechanical condition at the connection.
Include monitoring wires in the setup record. If those wires add support, cross a moving joint or introduce an extra detachable connection, the reviewer needs to know. The objective is to avoid an undocumented test arrangement that changes the very load path being investigated.
On small screens, swipe or scroll sideways to read every column. Keyboard users can focus the table and use the arrow keys.
| Installation field | Evidence to request | Review decision |
|---|---|---|
| Connector restraint | Drawing of both mating halves and their supports | Does the report cover the actual fixed or floating arrangement? |
| Cable exit and span | Route, unsupported length and first clamp position | Is the service arrangement represented or explicitly excluded? |
| Bracket or panel | Part revision, attachment details and setup photographs | Is the tested support identifiable and reproducible? |
| Branches and accessories | Locations of branches, sleeves, boots and attached masses | Are important configuration differences documented? |
| Fixture axes | Axis definitions tied to the installed connector | Can each exposure be related to the application drawing? |
| Measurement leads | Routing and connection boundary | Could the instrumentation alter support or add an unresolved failure path? |
Describe the exposure without selecting severity by headline
A vibration reference needs its edition, method, condition and applicable deviations. Record whether the exposure is sinusoidal or random, its frequency content, duration and axis sequence, and the relevant environmental condition. The laboratory report should preserve the approved profile and any recorded deviations.
For sinusoidal testing, a frequency range alone is incomplete. The specification may also control displacement, acceleration, sweep details and duration. For random testing, an overall acceleration figure alone does not describe the full spectral profile. Ask for the actual approved definition rather than trying to rank reports by whichever number looks largest.
Molex's PowerWize 8 mm test summary, 2155108000-TS gives a bounded example: its vibration row references EIA-364-28 condition VII-D, specifies fifteen minutes per axis and reports both resistance-change and discontinuity requirements. The named product configuration and sequence remain part of that evidence. The example does not establish an equivalent exposure for another connector.
Ask engineering to compare the exposure with the intended equipment environment. Purchasing should record the resulting applicability decision, including any exclusions, rather than independently declaring one standard or test duration more demanding than another.
Define what the event detector is required to detect
A discontinuity requirement needs more than a duration. The record should identify the electrical condition that triggers an event, the minimum event duration covered, the monitored circuit arrangement and the excitation conditions. Resistance-based, voltage-based and functional-output observations should not be described as interchangeable without an approved explanation.
Ask for demonstrated capability at the required threshold and duration, including the complete measurement path used in the test. A data logger's advertised sampling rate is not, by itself, proof that the configured system will identify every event of interest. Instrument bandwidth, triggering, filtering, channel handling and recorded dead time belong in the laboratory's capability explanation.
Keep the question practical: can the provider show that the selected method detects the events specified by the approved plan while all required channels are active? The buyer need not design the detector. The buyer should obtain an intelligible answer and retain the supporting method or verification reference.
Do not silently translate a reported absence of events into perfect continuity at all time scales. A defensible conclusion is limited to the monitored paths, test duration and stated detection capability. If the application requires a different threshold, the existing result needs an applicability review before acceptance.
Map monitored channels to physical circuits
A monitor may observe individual contacts, grouped paths or a series chain containing several interfaces. Each arrangement answers a different localization question. A series chain can reveal an event somewhere in that monitored path, but the summary alone may not identify the responsible contact.
Request a circuit drawing that connects each channel name to physical cavity identifiers and specimen serial numbers. Identify any return conductors, jumpers, fixture connections or shared paths included in the measurement. If only selected circuits are monitored, list those excluded and obtain the engineering rationale for the selection.
The record should also distinguish the detector's electrical excitation from the application's normal operating load. A continuity-monitoring configuration is not automatically a simultaneous current-carry or temperature-rise evaluation. If both questions matter, specify their separate evidence boundaries and the approved relationship between them.
Samtec's ExaMAX intermateability report 694874 provides a useful reporting example: it identifies the tested mating combinations and presents event-detection results separately from resistance-change results. Its named backplane combinations are the scope of that report, not evidence of interchangeability between unrelated connector brands.
Agree how pauses, resets and invalid data will be handled
The test plan should explain what happens if monitoring stops, a channel is disconnected or an instrument is reset during an exposure. A period without valid monitoring is an evidence gap. It should not be presented as a period with zero detected events.
Ask the laboratory to retain elapsed exposure time, channel availability and any interruption or restart notes. If the plan permits a restart, identify the applicable rule and the disposition of the earlier data. The buyer should be able to distinguish an uninterrupted completed run from an accepted run with a documented deviation.
Preserve event records before investigating their cause. An apparent instrumentation fault needs an explanation tied to observed evidence, not deletion because it makes the report inconvenient. Likewise, an event should not automatically be attributed to the connector when the monitored path includes other connections.
Require the final conclusion to state both validity and acceptance. A valid test can fail a criterion. A test without adequate monitoring can be inconclusive even when the specimen looks undamaged. Those outcomes lead to different purchasing actions and should use different status labels.
Send the mating-pair identity, support drawing and monitoring requirement for an RFQ review. Include unresolved conditions explicitly so quotations can separate existing evidence from work that would still need agreement.
Compare hypothetical supplier returns on the same question
Consider an explicitly hypothetical purchase of a sealed signal connector used in a mobile equipment harness. Engineering has already defined the exposure and the allowed electrical events. The harness drawing includes a panel-mounted receptacle and a supported cable branch. No numeric limits in this example are intended as recommendations, and no results describe a SINAWATTS product.
Three suppliers return different documents. The first offers a family qualification statement and final resistance readings. The second supplies a complete event record but uses an installation arrangement different from the buyer's drawing. The third identifies the exact assembly, matching support arrangement and monitored circuits, with a recorded pause whose disposition remains unresolved.
On small screens, swipe or scroll sideways to read every column. Keyboard users can focus the table and use the arrow keys.
| Hypothetical offer | What the evidence supports | What remains open |
|---|---|---|
| A: final resistance only | Residual electrical condition of identified samples | Continuity during exposure and applicability of the family statement |
| B: event record, different support | Dynamic result for the reported mounting arrangement | Engineering assessment of the fixture and cable-support difference |
| C: matching arrangement, monitoring pause | Traceable results during the valid monitored periods | Approved handling of the pause and any uncovered exposure |
None should be labeled fully qualified merely because a cover sheet says pass. Offer A needs the missing dynamic evidence if the project requires it. Offer B may be acceptable after a documented engineering assessment; a difference does not automatically require a new test. Offer C needs closure of the validity question before its otherwise strong documentation supports release.
This comparison avoids rewarding document volume alone. The best next action is the smallest evidence request that resolves the actual uncertainty. Request the missing channel record, applicability assessment or deviation disposition instead of asking every bidder to repeat an entire qualification program without cause.
Read an event-log extract without losing its denominator
A zero in a results table needs a denominator: which channels were active, over which exposure periods, on how many identified specimens? Record these fields beside the event count. Otherwise, a partial run and a fully monitored run can look identical in a purchasing spreadsheet.
For a hypothetical illustration, assume a plan requires three named axes with six monitored channels. A report includes valid records for all six channels on two axes, but one channel lacks a valid record during the third. The buyer should not summarize that return as eighteen completed channel-axis observations merely because the other seventeen show no events. The missing observation remains a coverage question; its disposition belongs to the approved plan. These invented counts illustrate record review, not a recommended sample size or qualification scheme.
Also distinguish a recorded event count from the number of affected connectors. One monitored path may include several interfaces, and several logged events may occur on the same specimen. Request the report's counting convention before comparing failure percentages or drawing reliability conclusions from the table.
A useful extract contains specimen identity, channel, exposure axis, start and stop references, validity status, event count and disposition reference. If timestamps are used to compare detector events with shaker records, ask the laboratory to explain their alignment. Purchasing should not infer causation merely because two separate clocks show similar times.
Preserve the original units and threshold wording when transferring results. A report stating that no event met its specified trigger is narrower than a statement that resistance never changed. An event counter may also summarize detections without preserving full waveforms; ask what records exist before promising that a later investigation can reconstruct every transient.
This review can often be completed from the existing report package. Its purpose is to expose missing coverage and ambiguous conclusions before release, rather than demand new testing whenever the report format differs from the buyer's template.
Keep post-exposure examinations tied to the same samples
After exposure, preserve the approved sequence for appearance, retention and electrical measurements. Record any unmating or handling that occurs between the dynamic evaluation and the final measurements. An interface deliberately reseated before measurement has a different history from one evaluated without disturbance.
Use the same specimen identifiers throughout. A report that combines one specimen's event log with another specimen's final resistance cannot establish a complete before-and-after history for either. Where separate sample groups are intentional, explain their roles and avoid presenting them as one continuous sequence.
Inspection records should be specific enough to support disposition. “No damage” is more useful when the inspection scope identifies housings, locks, mounting features, terminations and seals as applicable. Do not add destructive checks casually; their timing and sample allocation belong in the approved plan.
The crimp-joint durability guide addresses termination-focused exposure and assessment. This connector guide adds the separable interface and continuous event-detection question; a crimp qualification does not automatically close either.
Turn the evidence review into release and change controls
Separate three release statuses: supported for the defined installation, conditionally supported with a named restriction, and not yet supported. Every restriction should identify an owner and the action needed to close it. Avoid conditional approval wording that production interprets as unrestricted permission.
Carry the approved cable-support drawing into assembly documentation. A change to a clamp position, branch mass, backshell, terminal option or mating half can invalidate an earlier applicability assumption. The change does not necessarily require complete retesting, but it should trigger an assessment before substitution is released.
Keep routine production checks distinct from qualification. A continuity screen on every harness can verify the specified production condition; it does not reproduce a vibration qualification unless the method actually does so. Request a control plan connecting part identity, assembly checks and traceability to the qualified configuration.
For commercial comparison, ask bidders to price the same evidence scope. Separate existing reports, engineering review, additional specimens, external evaluation and document deliverables where applicable. Do not assume a laboratory service, certificate, turnaround time or fixed cost is included unless the quotation says so.
The OEM and ODM enquiry page provides a place to describe the assembly requirement. Its presence does not establish that a particular connector system or vibration-test service is available; the enquiry should request a specific, documented response.
Build a compact evidence index for the purchase order
Use one index to connect the final part list, installation drawing, approved plan, report and acceptance decision. Give each document a revision and identify which supplier response it resolves. An index makes later replacement review faster because the buyer can see why the original offer was accepted.
Retain the unedited result files or agreed report attachments according to the project record policy. A purchasing summary is useful for decision making but should not replace the underlying evidence. Record limitations in plain language so they remain visible to engineering, quality and purchasing after staff changes.
Close the package with a configuration statement: the approved conclusion applies to the listed assembly and installation under the documented exposure and monitoring conditions. Any wider application remains subject to review. This wording preserves a useful qualification without claiming universal vibration immunity.
FAQ
Does a low final contact resistance prove there were no interruptions?
No. It describes the measured condition at that measurement stage. A brief interruption can end before the final measurement. When dynamic continuity is required, obtain the corresponding monitored exposure record and its detection limits. Keep resistance and event-detection results as separate acceptance rows so neither is accidentally omitted.
Is one microsecond the correct limit for every connector?
No. It appears in some product-specific requirements, including the examples cited here. The applicable product specification and system requirement must establish the project criterion. Copying a duration from an unrelated family does not establish suitability, and duration alone omits the electrical threshold and measurement capability.
Can a supplier use a standard fixture instead of our enclosure?
Possibly, if engineering accepts the applicability of that fixture to the intended installation. Request drawings of the tested and proposed arrangements and identify their differences. A standard fixture can provide valid component evidence without automatically proving the behavior of every enclosure, cable span or support arrangement.
Must every contact be monitored individually?
The approved evaluation plan should decide the required coverage. Individual monitoring and grouped paths provide different information, particularly when locating an event. Require a channel-to-cavity map and the rationale for omitted circuits. Do not infer full circuit coverage from a report that lists only a total sample count.
Does a communication link staying online replace continuity monitoring?
Not automatically. A functional communication observation answers a system-level question under its own timing and diagnostic behavior. If it is proposed as an alternative, engineering must establish what events it can reveal and whether that meets the requirement. Preserve its scope rather than relabeling it as an identical electrical event test.
What should happen when a report records an interruption?
Preserve the original event record and determine its disposition through the approved process. Review the specimen, monitored path, instrumentation and exposure history. Do not erase the event by repeating the test until a pass appears. Any repeat should have a documented reason, configuration and relationship to the original result.
What information is needed for price and schedule comparison?
Provide the mating-pair identities, quantities, installation drawing, existing evidence and outstanding evaluation questions. Ask each bidder to identify included documents, sample needs and any separately quoted work. Prices, availability, test capability and schedules require confirmation for the actual request; they cannot be inferred from a general product category.
Send a connector vibration evidence RFQ
Prepare a short package containing the part and cavity maps, support drawing, intended environment, approved acceptance references and a list of missing evidence. Identify who will approve applicability and who will resolve test deviations. This gives a supplier a clear technical question and gives your purchasing team a traceable basis for comparing the response.
Send your connector vibration and discontinuity-monitoring RFQ package. Include the exact installation revision and mark unknown conditions as open questions, so the discussion can focus on evidence that supports the connection you actually intend to buy.