Other electric sound or visual signalling apparatus, except for cycles or motor vehicles, and except electromechanical traffic control equipment for transport facilities

1. Scope and Applicability

This PCR applies to the factory-gate production of complete electric apparatus whose principal function is to provide a sound or visual signal and that falls within CPC 3.0 subclass 46929. It covers apparatus such as industrial or general-purpose buzzers, sirens, bells, beacons, annunciators, and visual indicator panels when they are not classified as burglar or fire alarms and are not made for cycles, motor vehicles, or electromechanical traffic control at transport facilities.

The PCR covers purchased component manufacture through linked upstream datasets and the foreground receipt, assembly, optional cleaning, functional testing, finishing needed for delivery, and factory-gate packaging of the apparatus. It excludes use-stage electricity, installation, maintenance, distribution after the factory gate, and end-of-life unless the study expands the boundary and reports those stages separately. A data producer must add every actual bill-of-materials component, auxiliary, packaging item, waste, and direct emission as its own atomic exchange; the common rows below are a minimum pattern, not a substitute for a product-specific bill of materials.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.electrical-machinery-and-apparatus.other-electric-sound-or-visual-signalling-apparatus-except-for-cycles-or-motor-vehicles-d4a27639
classification_refs	CPC 3.0: 46929
covered_products	Complete electric sound-signalling or visual-signalling apparatus in CPC 46929, including single-mode and combined sound-and-light devices
excluded_products	Burglar or fire alarms and similar apparatus in CPC 46921; signalling equipment for cycles or motor vehicles; electromechanical traffic control equipment for transport facilities; components supplied separately; audio reproduction equipment
representative_product	A market-ready electric sound or visual signalling apparatus that has passed declared functional tests
production_route	Receipt of purchased components, device assembly, optional soldering or cleaning, functional testing, final preparation, and packaging; in-house component manufacture is added when performed
market_state	Complete, conforming, packaged where applicable, and ready to leave the manufacturing site

3. Reference Flow

Field	Value
What	Provision of a complete electric apparatus that emits the declared sound or visual signal
How much	1 kg of conforming apparatus at the factory gate, excluding separately reported transport packaging mass
How well	Meets the declared signalling function, rated electrical characteristics, functional test, and applicable product conformity requirements
How long or cycle	One production lot; service life is a required qualifier but is not embedded in this mass-based production reference
reference_flow_link	reference_product

Field	Value
Reference amount	1 kg
Reference product flow	Other electric sound or visual signalling apparatus, except for cycles or motor vehicles, and except electromechanical traffic control equipment for transport facilities a17e1609-603f-43f6-beec-b5a86d7d295a
Reference flow property	Mass 93a60a56-a3c8-11da-a746-0800200b9a66
Reference unit group	Units of mass 93a60a57-a4c8-11da-a746-0800200c9a66
Reference unit	kg
Required qualifiers	apparatus model and signalling mode; sound-output or luminous-output specification; rated voltage and power supply; enclosure material and ingress rating where relevant; functional test criterion; service-life assumption; production geography and reference year; packaging inclusion; regulatory or conformity regime

When constructing a foreground data package, the items listed in Required qualifiers must be declared in dataset metadata, process notes, reference flow comment, product description, or an equivalent data package field. Missing required qualifiers make the reference flow definition incomplete for that data package.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_mass	reference product and mass-based component, packaging, and waste rows	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Use dry or as-received mass consistently, state the basis, exclude transport packaging from the 1 kg product denominator, and report that packaging as separate input rows.
electricity_energy	purchased electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	MJ	Preserve the meter basis and convert kWh to MJ using 1 kWh = 3.6 MJ; disclose voltage level, grid geography, contract mix, and whether transformer or internal distribution losses are included.
water_mass	process water	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Prefer mass measurement; if volume is metered, convert with a measured or documented density for the applicable temperature and state the conversion basis.

5. System Boundary

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased components, auxiliaries, and packaging as received at the signalling-apparatus manufacturing site
starting_condition_role	Foreground gate at receiving; upstream production and inbound supply burdens remain represented by linked supplier or secondary datasets
product_classification_scope	Complete CPC 46929 apparatus only; separately supplied components and excluded signalling categories retain their own identities
recursive_input_rule	If an unfinished or subcontracted CPC 46929 apparatus enters the foreground, record it as one product input with an upstream dataset and exclude the already represented operations from the receiving site's foreground to prevent recursion and double counting.
upstream_dataset_requirement	Every purchased component, material, auxiliary, energy carrier, water input, and packaging item requires a geographically and technologically appropriate upstream dataset or a documented data gap.
disclosure	Declare purchased-versus-in-house component scope, soldering and cleaning route, product variant, rejects, packaging boundary, treatment destinations, geography, reference year, and all exclusions.

rule_id	Applies to	Rule	source_ids
boundary_factory_gate	product system	Include receipt, assembly, optional soldering and cleaning, functional testing, rework attributable to the lot, final preparation, and packaging through release at the factory gate; link upstream datasets for every input.	us-epa-electronics-sector-1995
boundary_variant_inventory	bill of materials and route	Record each actual component, auxiliary, packaging item, waste, and direct emission separately; apply conditional common rows only when present and disclose omitted route steps.	us-epa-electronics-sector-1995
boundary_exclusions	category identity	Exclude CPC 46921 burglar or fire alarms, cycle or motor-vehicle signalling equipment, and electromechanical traffic control equipment for transport facilities from this PCR.	un-cpc-3-0-structure-2025; un-cpc-3-0-explanatory-notes-2025

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
apparatus_manufacture	Signalling apparatus assembly, testing, and factory-gate preparation	required	Always	Foreground manufacture	1 kg conforming apparatus at factory gate

Process: Signalling apparatus assembly, testing, and factory-gate preparation (apparatus_manufacture)

This process covers receipt of purchased parts, mechanical and electrical assembly, route-specific cleaning, functional testing, rework attributable to the production lot, and packaging before factory release. If printed-board population, enclosure fabrication, coating, or another component-making operation occurs on site, add that operation and all of its atomic exchanges rather than hiding them in these rows.

Inputs

Product flows

Populated printed wiring board (assembled_pwb)

Record the purchased populated board mass when a board assembly crosses the site boundary. The UUID remains unresolved because the state-100 candidates did not verify a populated delivery state.

• Selected flow: Populated printed wiring board assembly
• Flow property / unit: Mass / kg
• Amount rule: Sum accepted populated-board mass issued to the production lot, including replacements consumed in rework
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming apparatus at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_and_packaging_records
• Sources: us-epa-electronics-sector-1995

Audible signalling element (buzzer_siren_element)

Record this component only for an apparatus using a buzzer or siren element; other sound-producing technologies must be added as their own atomic product rows.

• Selected flow: Buzzer or siren element b511a29d-984d-4699-81c9-d04d779e2ac2
• Flow property / unit: Mass / kg
• Amount rule: Sum accepted buzzer-or-siren-element mass issued to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming apparatus at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_and_packaging_records

Visual signalling LED module (led_module)

Record this component only for a visual-signalling apparatus that contains an LED module; non-LED light sources must be added as their own atomic product rows.

• Selected flow: LED module f0e13a6e-6380-4372-98a0-899623339d91
• Flow property / unit: Mass / kg
• Amount rule: Sum accepted LED-module mass issued to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming apparatus at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_and_packaging_records

Plastic housing (plastic_housing)

Record this component only when a complete plastic housing is purchased. A metal housing or in-house moulding route must be represented with separate, material-specific rows.

• Selected flow: Plastic housing 8751d2f6-df48-47d3-ac51-d34f96fbec96
• Flow property / unit: Mass / kg
• Amount rule: Sum accepted plastic-housing mass issued to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming apparatus at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_and_packaging_records

Purchased electricity (electricity)

Record electricity delivered to assembly, cleaning, testing, rework, and factory-gate preparation equipment, allocating shared meters according to the calculation rule below.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Metered or allocated purchased electricity converted to MJ
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming apparatus at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_energy_records

Aqueous-cleaning process water (process_water)

Record process water only when it is supplied to aqueous cleaning or rinsing within the foreground. Cooling water and sanitary water require separate identities and must not be merged into this row.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Metered or batch-recorded process water supplied to the applicable production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg conforming apparatus at factory gate for the aqueous-cleaning route
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_water_records
• Sources: us-epa-electronics-sector-1995

Corrugated board box (corrugated_box)

Record the mass of the converted corrugated box supplied with the factory-gate product. Other packaging components must be added as separate atomic rows.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: Sum corrugated-box mass issued for conforming units in the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg conforming apparatus at factory gate, with box mass excluded from the denominator
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_component_and_packaging_records

Waste flows

No waste input is prescribed. Record any incoming waste used as a material or any waste received for treatment as a separate atomic row with its actual identity and boundary role.

Elementary flows

No elementary input is prescribed. Add directly abstracted water, land occupation, or other elementary inputs only when they cross the foreground boundary and are measured or calculated for the studied route.

Outputs

Product flows

Conforming reference apparatus (reference_product)

Record only units that pass the declared release test and satisfy the reference-product qualifiers.

• Selected flow: Other electric sound or visual signalling apparatus, except for cycles or motor vehicles, and except electromechanical traffic control equipment for transport facilities a17e1609-603f-43f6-beec-b5a86d7d295a
• Flow property / unit: Mass / kg
• Amount rule: Net measured mass of conforming apparatus released at the factory gate, excluding separately reported transport packaging
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg conforming apparatus at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_output_and_reject_records
• Sources: un-cpc-3-0-structure-2025

Waste flows

Rejected populated printed wiring boards (waste_populated_pwb)

Record rejected or scrapped populated boards separately from bare-board scrap, solder dross, metal scrap, plastics, and complete rejected apparatus.

• Selected flow: Waste populated printed wiring board eb5ffe4a-49af-450c-9a31-3efdfd343f8a
• Flow property / unit: Mass / kg
• Amount rule: Measured mass handed to the declared internal or external treatment route, net of successfully reworked boards
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg conforming apparatus at factory gate
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_output_and_reject_records
• Sources: us-epa-electronics-sector-1995

Elementary flows

No default direct emission is prescribed. When soldering, solvent cleaning, coating, fuel combustion, or another on-site operation occurs, add every measured or calculated emitted substance as its own elementary-flow row and disclose the estimation method.

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivision	shared operations	Prefer meter, batch, work-order, machine-time, or mass-based subdivision that assigns actual activity to the studied model and production lot before applying allocation.
allocation_shared_resources	utilities and shared consumables	If subdivision is infeasible, allocate a shared resource using the closest documented causal driver, such as machine time for assembly electricity or cleaned board area for cleaning inputs; disclose the driver and sensitivity.
allocation_recycling	production scrap and recycling	Report waste mass and destination separately. Do not credit avoided primary production or subtract revenue from the foreground inventory unless the chosen LCA method explicitly requires it; document any downstream recycling convention outside the measured factory inventory.

8. Foreground Data Collection, Calculation, and Quality Rules

Data Collection Protocols

protocol_id	process_id	flow_role	record_type	raw_fields	collection_method	unit	frequency	temporal_coverage	site_scope	aggregation_rule	quality_evidence
cp_component_and_packaging_records	apparatus_manufacture	purchased component or packaging input	purchase receipt, bill of materials, issue record, specification	item identity; supplier; material or component state; received mass; issued quantity; unit mass; lot; rejects returned; packaging inclusion	Reconcile approved bill of materials and stock issues to supplier receipts; measure representative unit mass when records are count-based.	kg and item count	each production lot, aggregated for the reference period	representative continuous 12-month period or disclosed campaign	all manufacturing lines producing the declared model	Net issued mass = issued plus replacements minus unused returns; divide by conforming unpackaged product mass.	signed receiving records; calibrated balance records; bill-of-materials revision; reconciliation result
cp_energy_records	apparatus_manufacture	purchased electricity	utility meter, submeter, machine log	meter start and end; submeter coverage; machine time; production lot; downtime; conforming output mass; loss boundary	Prefer line or equipment submeters; otherwise allocate facility-meter consumption using documented machine time after excluding non-production loads.	kWh	meter interval and each production lot, aggregated monthly	representative continuous 12-month period or disclosed campaign	assembly, cleaning, testing, rework, and packaging equipment in scope	Convert allocated kWh to MJ by multiplying by 3.6; divide by conforming unpackaged product mass.	meter calibration; invoice reconciliation; allocation worksheet; downtime log
cp_water_records	apparatus_manufacture	aqueous-cleaning process water	water meter, batch sheet	meter start and end or batch volume; water identity; density basis; cleaning route; lot; conforming output mass	Read a dedicated meter or sum batch additions for production cleaning only; exclude cooling and sanitary water.	kg or measured volume with density	each cleaning batch, aggregated monthly	representative continuous 12-month period or disclosed campaign	all in-scope aqueous-cleaning equipment	Convert volume to mass using documented density when needed; divide by conforming unpackaged product mass.	meter calibration; batch-sheet sign-off; density source; water-balance reconciliation
cp_output_and_reject_records	apparatus_manufacture	conforming product and rejected populated-board output	release log, scale record, nonconformance and waste manifest	model; lot; passed units; net unit mass; packaging mass; failed units; rework outcome; waste identity; waste mass; destination	Reconcile released units and measured net mass with production and nonconformance records; weigh segregated populated-board waste at hand-off.	kg and item count	each production lot and waste hand-off	representative continuous 12-month period or disclosed campaign	all lines and waste collection points in scope	Conforming mass excludes separately reported packaging; waste mass excludes items successfully returned to production; normalize both to 1 kg conforming product.	calibrated scale; signed release record; nonconformance disposition; waste manifest

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_mass_normalization	all mass-based rows	normalized kg/kg = attributable exchange mass / conforming unpackaged apparatus mass	attributable exchange mass; conforming unpackaged apparatus mass	kg exchange per kg reference product
calc_count_to_mass	count-based components and boxes	input mass = net issued item count × representative measured or supplier-declared unit mass	item count; unit mass; unused returns	kg input
calc_electricity	purchased electricity	MJ/kg = attributable metered kWh × 3.6 / conforming unpackaged apparatus mass	metered kWh; allocation driver where required; conforming unpackaged apparatus mass	MJ electricity per kg reference product
calc_water_mass	volume-metered process water	kg/kg = measured volume × documented density / conforming unpackaged apparatus mass	volume; density; conforming unpackaged apparatus mass	kg process water per kg reference product

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_identity	product, components, packaging, and waste	Match each row to the actual model, delivered state, material or component identity, and treatment role; do not substitute an umbrella flow or an unpopulated board for a populated assembly.	specification, bill of materials, supplier record, waste manifest, and UUID audit
dq_completeness	foreground inventory	Reconcile component issues, utilities, conforming output, rejects, and all route-specific auxiliaries, wastes, and direct emissions for the same time and site scope; explain every excluded operation.	mass and energy reconciliation; completeness checklist; exclusion log
dq_temporal	foreground records	Use a representative continuous 12-month period where available; otherwise disclose the campaign, seasonality, utilisation, downtime, and representativeness limitation.	dated meters, invoices, lot records, and production calendar
dq_hazardous_materials	homogeneous materials and technical documentation	Where the declared market regime applies, retain supplier declarations or analytical evidence for regulated substances at the applicable homogeneous-material level and identify exemptions used; this is a conformity disclosure, not an empirical inventory range.	supplier material declarations, test reports, technical documentation, and eu-rohs-2011-65
dq_geography_technology	upstream datasets	Match supplier geography, component state, electricity voltage and mix, water delivery, and waste treatment technology; document proxies and their expected influence.	supplier location, dataset metadata, utility contract, and treatment manifest

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_identity	reference product	Confirm CPC 46929 identity, the declared sound or visual signalling function, complete-product state, exclusions, and all required qualifiers before accepting the dataset.	un-cpc-3-0-structure-2025; un-cpc-3-0-explanatory-notes-2025
validate_reference	normalization	Confirm that every amount uses the same conforming unpackaged factory-gate product mass and that separately reported packaging is excluded from the 1 kg denominator.
validate_routes	inventory completeness	For each actual route, verify that all bill-of-materials inputs, auxiliaries, utilities, rejects, wastes, and direct emissions appear as atomic exchanges; justify every conditional row marked not applicable.	us-epa-electronics-sector-1995
validate_reconciliation	foreground records	Reconcile received or issued component mass, conforming output, rework, and waste over the same period; investigate material discrepancies and meter-allocation gaps before release.
validate_uuid_property_unit	UUID-bearing rows	Confirm state-code-100 UUID identity, flow type, product or waste state, property, unit group, and official Chinese base name; reject proxies or mismatched candidate states.
validate_regulated_substances	declared conformity regime	Treat substance thresholds as conformity limits only, retain applicable evidence and exemptions, and do not reinterpret them as production inventory ranges.	eu-rohs-2011-65

10. Published Dataset Profile

Field	Value
dataset_role	Factory-gate foreground production dataset for a declared CPC 46929 apparatus model and manufacturing route
downstream_use	secondary_dataset; background_dataset
allowed_use	Product or component system models whose apparatus identity, route, geography, time, packaging boundary, and performance qualifiers are compatible with the published metadata
excluded_use	CPC 46921 alarm apparatus, vehicle signalling equipment, transport-facility electromechanical traffic control, component-only products, or a different technology represented without adjustment
required_metadata	canonical PCR id; CPC reference; model and signalling mode; performance and test criteria; rated electrical characteristics; service-life assumption; bill-of-materials revision; purchased-versus-in-house scope; site and geography; reference period; packaging boundary; allocation; waste destinations; conformity regime; unresolved data gaps
required_quality_disclosure	primary-data coverage; meter and mass reconciliation; conditional route decisions; proxies; UUID gaps; upstream dataset geography and technology; regulated-substance evidence where applicable; uncertainty and exclusions
update_trigger	Change in model or bill of materials, signalling or power technology, manufacturing or cleaning route, supplier or geography, electricity mix, packaging, waste treatment, conformity regime, allocation method, or a material shift in measured inputs, output, or rejects

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	United Nations Statistics Division, CPC Version 3.0 Structure, 30 June 2025, https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv (retrieved 2026-09-05)	Official CPC 46929 product-classification identity
un-cpc-3-0-explanatory-notes-2025	official_guidance	United Nations Statistics Division, CPC Version 3.0 Explanatory Notes, 30 June 2025, https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Exp_Notes_30Jun2025.pdf (retrieved 2026-09-05)	Placement of CPC 46929 beside the separate CPC 46921 alarm subclass and category exclusions
us-epa-electronics-sector-1995	official_guidance	United States Environmental Protection Agency, Profile of the Electronics and Computer Industry, EPA/310-R-95-002, September 1995, https://archive.epa.gov/compliance/resources/publications/assistance/sectors/web/pdf/elecmpsn-2.pdf (retrieved 2026-09-05)	Electronics assembly, soldering, cleaning, testing, packaging, and waste process decomposition
eu-rohs-2011-65	official_guidance	Directive 2011/65/EU of the European Parliament and of the Council of 8 June 2011, Official Journal L 174, https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32011L0065 (retrieved 2026-09-05)	Homogeneous-material definition, regulated-substance conformity evidence, and technical-documentation disclosure