For membrane switches bought for an equipment package, sign off component inspection, simulated package testing and site integration separately. For each item, specify whether it uses actual equipment or a simulated signal, who supplies the record and when it is accepted. A continuity pass covers that component check only. Displaying a simulated signal does not show that equipment in the field has sent feedback. List site work separately on the request for quotation and name the person responsible for accepting it.
On November 9, 2026, Metso announced an order for the Jerritt Canyon gold mine restart. The scope includes a vertical roller mill, a baghouse filter, a fan, a hot gas generator and auxiliary equipment. The mill will grind material fed to the existing roaster circuit. The announcement does not disclose the project's buttons, wiring, acceptance arrangements or any Baoshengda supply relationship. For a separate project adding a new package to an existing line, it raises a practical purchasing question: if the supplier simulates a fan-running signal at the factory, can the acceptance record say the field fan has actually returned that signal?
Sign for the equipment and conditions actually tested
The public abstract of IEC 62381:2024 distinguishes factory acceptance testing (FAT), site acceptance testing (SAT) and site integration testing (SIT) for process-industry automation systems. The ISA-105 standards overview likewise distinguishes validation at the supplier's site from field integration and discusses responsibilities for owners, vendors and contractors. The table below is a purchasing example for ordinary, non-safety keys. It is not a set of component inspection clauses from the standard. Agree on the stages and sign-off roles for your project. Keep emergency stops, safety interlocks, hazardous-area suitability and whole-line startup out of the acceptance decision for ordinary keys.
| Item being accepted | What the RFQ attachment should say | What the evidence can cover |
|---|---|---|
| Membrane switch component | Drawing revision, lot, pin assignments and agreed electrical checks. The supplier provides the component inspection record. | Accept the component against the agreed items. Judge continuity, shorts and insulation separately; see the circuit acceptance guide (Chinese). |
| Simulated equipment-package test | Identify the panel, controller and program versions. Specify which feedback signals are simulated and who provides the I/O list and test record. | Sign for the key inputs, logic and displays actually tested. List the corresponding field feedback separately. |
| Site integration with the existing line | Identify equipment tags and interface revisions. Name who supplies the site conditions, records the real feedback and signs acceptance. | Sign this item only when agreed field conditions are met and original records are available. Leave untested items open. |
Record simulated feedback in the result itself
Suppose an ordinary status key opens a fan screen during the package test, and the “running” indication comes from a simulated input. The acceptance record can say: “Status key, display and simulated input logic passed; actual fan feedback pending site integration.” Attach the real fan tag, prerequisites and person responsible to the open item. This is a documentation example, not a procedure for wiring, starting equipment or validating safety functions. If you are buying only a component test fixture, see the test-fixture procurement handoff guide.
Shenzhen Baoshengda Technology Co., Ltd.'s membrane switch customization page (Chinese) asks buyers to specify the keys, circuits, flexible tail and adhesive against the housing, host-board interface and operating conditions, using matching drawings and fitted samples to confirm supply requirements. See also the English product page. Those product details do not mean site integration has been quoted. If you are only buying a graphic overlay or keypad overlay without switch circuitry, specify appearance, legends and fit as applicable. Do not apply the continuity criteria for a complete membrane switch.
Use the project contact page to share the relevant drawing numbers, interface list and acceptance items that you are allowed to disclose. Ask the supplier to mark each line “included,” “quoted separately” or “out of scope.” Put the party responsible for verifying field feedback and whether that work is included on the same line.