Parts and accessories for the goods of subclasses 48263 and 48264

1. Scope and Applicability

This PCR applies to separately marketed original-equipment or replacement parts and accessories made specifically for gas, liquid or electricity supply or production meters, and for revolution or production counters, taximeters, mileometers, pedometers, speed indicators, tachometers and stroboscopes. It covers a declared finished part or accessory at the factory gate, including its directly controlled fabrication, cleaning, conditional electronics integration and calibration, final inspection, assembly and primary packing.

Complete measuring instruments, generic raw materials not yet transformed into identifiable parts, parts for other measuring or medical instruments, distribution after the factory gate, installation, use, maintenance and end-of-life are excluded. A data package must identify the host-instrument family, part function, material composition, manufacturing route, electronics content, calibration requirement and sale condition. The official CPC source establishes the category identity and its linkage to subclasses 48263 and 48264; it does not supply inventory amounts or performance ranges.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.medical-appliances-precision-and-optical-instruments-watches-and-clocks.parts-and-accessories-for-the-goods-of-subclasses-48263-and-48264
classification_refs	CPC 3.0: 48283, exact classification reference
covered_products	Separately marketed housings, frames, plates, rotors, gears, register or counter mechanisms, printed-wire-board-bearing modules, brackets, shafts, couplings, bezels and other dedicated parts or accessories for goods of CPC 48263 and 48264
excluded_products	Complete meters, counters, indicators, tachometers or stroboscopes; generic sheet, resin or electronic components before conversion into an identifiable dedicated part; parts for goods outside CPC 48263 and 48264
representative_product	One saleable finished meter or counter part/accessory, represented on a net mass basis
production_route	Material forming or machining, optional moulding and surface cleaning, conditional electronics integration or calibration, final assembly, inspection and packing
market_state	Conforming new part or accessory supplied at the factory gate, packed when primary packaging is used

3. Reference Flow

Field	Value
What	A conforming dedicated part or accessory that enables assembly, replacement or operation of a good in CPC 48263 or 48264
How much	1 kg net mass of saleable finished parts or accessories, excluding primary packaging
How well	Meets the declared drawing, material specification, dimensional tolerance, compatibility and functional inspection criteria for the named host-instrument family
How long or cycle	One production lot released at the factory gate; no service-life equivalence is claimed
reference_flow_link	The net mass of conforming finished output in row finished_meter_part

Field	Value
Reference amount	1 kg
Reference product flow	Parts and accessories for the goods of subclasses 48263 and 48264 (UUID unresolved)
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	host-instrument subclass and family; part/accessory name and function; drawing or model identifier; principal material and grade; electronics content; manufacturing route; calibration or test requirement; net mass; primary packaging status; manufacturing geography; production period

When constructing a foreground data package, every required qualifier must be declared in metadata, product description, reference-flow comment or an equivalent field. Missing qualifiers make the reference flow incomplete.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_net_mass	Reference product and normalization	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Weigh or calculate the net mass of conforming saleable parts after removal of primary packaging; normalize all inventory values to 1 kg net finished output.
packaging_separation	Primary packaging	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record packaging as a separate input and never include its mass in the reference amount.
energy_preservation	Electricity and fuels	Net calorific value or volume as defined by the selected flow	MJ for electricity; m3 for gaseous fuel	Preserve source-meter units and documented conversion factors; do not convert volume to mass without declared reference conditions and density.
mass_balance_basis	Material inputs, product and segregated wastes	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Reconcile incorporated material, recoverable production scrap, other material losses and net finished output for each declared material route.

5. System Boundary

The foreground boundary shall apply these rules:

rule_id	Applies to	Rule	source_ids
boundary_gate_to_gate_operations	Manufacturer-controlled production	Include material preparation, forming, machining, moulding, cleaning, conditional electronics integration or calibration, assembly, inspection, rework attributable to the lot and primary packing performed under the reporting organization's control.
boundary_purchased_inputs	Purchased materials, components, utilities and packaging	Record every purchased input as a separate product flow and link it to an upstream dataset that matches material grade, product state, supplier geography and technology where available.
boundary_direct_outputs	Wastes and elementary emissions	Record segregated production wastes, wastewater and direct elementary emissions generated by included operations; do not include emissions already represented in upstream electricity or material datasets.
boundary_exclusions	Activities outside the factory gate	Exclude capital goods unless required by the study goal, employee commuting, downstream distribution, installation, use, maintenance and end-of-life; disclose any study-specific inclusion.
boundary_product_identity	Category classification	Exclude production of complete CPC 48263 or 48264 instruments from the reference product and retain only separately marketed CPC 48283 parts or accessories.	un-cpc-3-0-2025

Boundary Abstraction

Field	Value
declared_starting_condition	Purchased constituent material, dedicated component and primary-packaging input received at the manufacturing site
starting_condition_role	Upstream production remains represented by linked supplier or background datasets; the foreground begins at receipt into manufacturer-controlled conversion and assembly operations
product_classification_scope	Dedicated separately marketed parts and accessories for the goods of CPC 48263 and 48264
recursive_input_rule	A purchased input that itself meets this PCR category remains an explicit same-category product input with its supplier dataset; do not recursively absorb it into the foreground output
upstream_dataset_requirement	Each purchased product input requires a compatible upstream dataset or an explicitly disclosed data gap; geography, technology, material grade and product state must be matched
disclosure	Declare the host instrument, part function, starting material or component state, included operations, outsourced operations, electronics route, calibration media, scrap destinations and primary-packaging status

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
part_fabrication	Part fabrication and surface cleaning	required	Applies to manufacturer-controlled conversion of at least one declared material into the dedicated part; conditionally include only the atomic route-specific exchanges that occur	foreground production	Gross material input and released intermediate-part mass for the production lot
electronics_calibration	Electronics integration and calibration	conditional	Include when the part contains a printed wire board or when methane or carbon dioxide is consumed as a calibration medium	electronics integration and functional calibration	Accepted electronic/calibrated intermediate-part mass
final_assembly_packing	Final assembly, inspection and packing	required	Applies to every conforming saleable part or accessory	final production and factory-gate release	Net conforming finished output mass

Process: Part fabrication and surface cleaning (part_fabrication)

Inputs

Product flows

Stainless-steel sheet for formed parts (stainless_steel_sheet)

Include only when stainless-steel sheet is cut or formed into the declared part; record the purchased grade and thickness.

• Selected flow: Stainless-steel sheet (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Measured received mass issued to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials

Primary aluminium-alloy sheet for formed parts (primary_aluminium_alloy_sheet)

Include only when primary aluminium-alloy sheet is used; disclose alloy, thickness and recycled-content claim.

• Selected flow: Primary aluminum alloy sheet 2a9549cc-dc9e-43a7-9379-7a0c0a0e4832
• Flow property / unit: Mass / kg
• Amount rule: Measured received mass issued to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials

Brass plate and strip for machined or formed parts (brass_plate_strip)

Include only when brass plate or strip is converted into the declared part; disclose alloy and form.

• Selected flow: Brass plate and strip 54cfcc10-ca05-4e3e-8332-08665781eba0
• Flow property / unit: Mass / kg
• Amount rule: Measured received mass issued to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials

ABS granulate for moulded parts (abs_granulate)

Include only when ABS is moulded at the reporting site; disclose grade, additives and recycled content.

• Selected flow: Acrylonitrile butadiene styrene (ABS) granulate b895c3a1-076e-4a42-a2c0-6088890c0bd9
• Flow property / unit: Mass / kg
• Amount rule: Measured ABS granulate issued to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_materials

Electricity for fabrication and cleaning (fabrication_electricity)

Record purchased electricity consumed by forming, machining, moulding, cleaning and associated directly controlled support equipment.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Metered electricity attributable to the production lot, with shared use allocated by documented machine time or submeter data
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_energy

Process water for aqueous cleaning (process_water)

Include only when process water crosses the boundary for washing, rinsing or solution preparation; exclude recirculated internal water until make-up or discharge crosses the boundary.

• Selected flow: Process Water 94a04f7e-2d5c-41f0-b182-d54a3b373a02
• Flow property / unit: Mass / kg
• Amount rule: Metered or batch-recorded make-up water supplied to included operations
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_records

Sodium hydroxide for alkaline cleaning (sodium_hydroxide)

Include only when sodium hydroxide is consumed in an alkaline cleaning bath; record the mass of pure sodium hydroxide equivalent and solution concentration.

• Selected flow: Sodium hydroxide e0abcced-0611-4c24-9290-5a2c5a0c4169
• Flow property / unit: Mass / kg
• Amount rule: Purchased solution mass multiplied by documented sodium-hydroxide mass fraction
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_cleaning_records

Natural gas for direct process heat (natural_gas)

Include only when gaseous natural gas is burned on site for heat treatment, drying or process heat attributable to the lot.

• Selected flow: natural gas in the gaseous state 4f19ca0e-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Volume / m3
• Amount rule: Metered or invoice-reconciled gas volume at declared reference conditions
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_energy

Industrial oxygen for oxygen-assisted cutting (industrial_oxygen)

Include only when industrial oxygen is supplied to an on-site oxygen-assisted cutting operation for the declared lot.

• Selected flow: Industrial oxygen bd4b0f96-2090-4806-a648-335ab20ff401
• Flow property / unit: Volume / m3
• Amount rule: Metered cylinder or bulk-supply volume at declared reference conditions
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_energy

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Site-generated stainless-steel fabrication scrap (stainless_steel_scrap)

Include only for the stainless-sheet route; record segregated offcuts and rejected pieces leaving the process.

• Selected flow: Stainless-steel scrap (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Measured segregated stainless-steel scrap mass leaving the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes

Aluminium fabrication scrap (aluminium_scrap)

Include only for the aluminium route; record segregated offcuts and rejected pieces before recycling or disposal.

• Selected flow: Aluminium Scrap 96c5f842-ea53-419b-b1cd-c02c479efb45
• Flow property / unit: Mass / kg
• Amount rule: Measured segregated aluminium scrap mass leaving the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes

ABS moulding and trimming scrap (abs_production_scrap)

Include only for on-site ABS moulding; keep clean regrind internally recirculated out of gross output until it leaves the boundary.

• Selected flow: ABS plastic production scrap (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Measured ABS runners, trimming scrap and rejected mouldings leaving the process boundary
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_fabrication_wastes

Wastewater from aqueous cleaning (wastewater)

Include when spent bath, rinse water or other aqueous cleaning effluent leaves the process; disclose treatment state and destination.

• Selected flow: Wastewater d2d44ce1-c0f4-461d-9413-f4b33e0d200f
• Flow property / unit: Mass / kg
• Amount rule: Measured discharge mass, or measured volume converted using documented density
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_cleaning_records

Elementary flows

Direct fossil carbon dioxide from natural-gas combustion (fossil_carbon_dioxide)

Include only the direct fossil carbon dioxide released by on-site combustion of the natural gas recorded in natural_gas; exclude upstream grid and fuel-supply emissions.

• Selected flow: carbon dioxide (fossil) 08a91e70-3ddc-11dd-923d-0050c2490048
• Flow property / unit: Mass / kg
• Amount rule: Natural-gas quantity multiplied by a documented site or jurisdiction combustion factor and oxidation basis
• Value mode: Calculated value (calculated_value)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_combustion_emissions

Process: Electronics integration and calibration (electronics_calibration)

Inputs

Product flows

Printed wire board incorporated into the part (printed_wire_board)

Include only when a printed wire board is physically incorporated into the saleable part; disclose board design and supplier.

• Selected flow: Printed Wire Board a8bd954c-59b3-4317-b4de-02a17d6da5ca
• Flow property / unit: Mass / kg
• Amount rule: Measured or supplier-declared board mass incorporated into accepted output
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electronics_records

Electricity for electronics integration and calibration (electronics_electricity)

Include electricity for soldering, programming, calibration benches and functional tests attributable to the part.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Submetered electricity or documented equipment power multiplied by operating time
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_electronics_records

Methane calibration gas (methane_calibration_gas)

Include only when purchased methane is consumed as a calibration medium and crosses the foreground boundary.

• Selected flow: Methane 59aebe7f-6f66-41b4-aa71-49bea068dc7b
• Flow property / unit: Mass / kg
• Amount rule: Supplier record or cylinder mass balance for methane consumed by the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_calibration_media

Carbon-dioxide calibration gas (carbon_dioxide_calibration_gas)

Include only when purchased carbon dioxide is consumed as a calibration medium; do not confuse it with the direct elementary emission row.

• Selected flow: Carbon dioxide 27f41c1c-535e-4d2a-bce9-2c7f4de11549
• Flow property / unit: Mass / kg
• Amount rule: Supplier record or cylinder mass balance for carbon dioxide consumed by the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Technology-specific (technology_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_calibration_media

Waste flows

Elementary flows

Outputs

Product flows

Waste flows

Elementary flows

Process: Final assembly, inspection and packing (final_assembly_packing)

Inputs

Product flows

Electricity for final assembly, inspection and packing (final_assembly_electricity)

Record purchased electricity for assembly tools, inspection equipment and packing operations attributable to the released lot.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: Submetered electricity or documented equipment power multiplied by operating time
• Value mode: Foreground record (foreground_record)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_final_release

Corrugated board boxes used as primary packaging (corrugated_board_boxes)

Include only when corrugated board boxes are supplied with the factory-gate product; keep box mass outside the reference amount.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: Measured or purchase-record box mass assigned to the production lot
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_final_release

Waste flows

Elementary flows

Outputs

Product flows

Conforming finished meter or counter part/accessory (finished_meter_part)

This is the reference-product output. Record only saleable dedicated parts or accessories that satisfy the declared release criteria; keep packaging mass separate.

• Selected flow: Parts and accessories for the goods of subclasses 48263 and 48264 (UUID unresolved)
• Flow property / unit: Mass / kg
• Amount rule: Measured net mass of conforming released parts, excluding primary packaging
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: 1 kg net finished part output
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_final_release

Waste flows

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_avoid_by_subdivision	Separately metered products, routes and production lots	Subdivide processes and use lot, machine or line records before allocating shared burdens.
allocation_shared_operations	Shared electricity, water and support operations	Allocate only the residual shared quantity using a documented causal driver such as machine time, batch time or measured throughput; mass allocation is a fallback and must be justified.
allocation_scrap	Recoverable production scrap	Record scrap as an explicit waste output; do not subtract an avoided virgin-material credit inside the foreground inventory. Apply recycling or substitution only in the downstream modelling system and disclose it.
allocation_no_complete_instrument_credit	Parts incorporated into complete instruments at the same site	Keep the part-production dataset separate from complete-instrument assembly and do not assign complete-instrument revenue or function to the part reference flow.

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_fabrication_materials	part_fabrication	material inputs	receiving, stores issue and BOM records	material identity; grade; form; supplier; received mass; issued mass; returned mass; lot id	Reconcile calibrated scale records, stores transactions and production BOM	kg	each lot	representative production period, normally at least 12 months or all lots for shorter campaigns	each reporting site and outsourced conversion step	Sum net issued mass by atomic material flow and normalize to conforming output	purchase specification, scale calibration, BOM revision and stock reconciliation
cp_fabrication_energy	part_fabrication	electricity, natural gas and industrial oxygen	meters, invoices, cylinder records and equipment logs	meter start/end; energy or gas quantity; reference conditions; equipment hours; lot id	Submeter where available; otherwise reconcile invoice totals to documented causal drivers	MJ or m3	monthly and each lot allocation	same period as output records	each reporting site	Subtract unrelated use, allocate residual shared use by documented driver and normalize to conforming output	meter calibration, invoice reconciliation and allocation workbook
cp_cleaning_records	part_fabrication	process water, sodium hydroxide and wastewater	bath make-up, chemical issue, water meter and discharge records	water quantity; solution quantity; NaOH fraction; bath changes; discharge quantity; density; treatment state	Record each bath make-up and discharge; reconcile with site water balance	kg	each bath change and monthly reconciliation	same period as output records	each reporting site	Convert solution to pure NaOH equivalent, sum make-up and discharge, normalize to conforming output	chemical certificate, meter/scale calibration and water-balance check
cp_fabrication_wastes	part_fabrication	segregated material scrap	scrap-bin weights, rejection logs and shipment records	material identity; grade; gross and tare mass; internal regrind; destination; lot id	Weigh segregated outputs and exclude internal recirculation until it crosses the boundary	kg	each shipment with lot allocation	same period as output records	each reporting site	Sum net outward scrap by atomic material and normalize to conforming output	calibrated scale, rejection record and waste transfer record
cp_combustion_emissions	part_fabrication	direct fossil carbon dioxide	fuel meter and emission-factor record	gas volume; reference conditions; factor; factor unit; oxidation basis; fossil fraction	Apply calc_direct_fossil_co2 to collected natural-gas use	kg	each reporting period	same period as gas records	each reporting site with direct combustion	Calculate, sum and normalize to conforming output	factor source retained in dataset, unit check and independent recalculation
cp_electronics_records	electronics_calibration	printed wire board and electricity	supplier BOM, scale, equipment log and submeter	board identity; board mass; supplier; accepted quantity; electricity; operating time; lot id	Reconcile incorporated board mass and electronics-line electricity to accepted parts	kg and MJ	each lot	same period as output records	each applicable line and site	Sum accepted incorporated board mass and attributable electricity, then normalize	supplier declaration, BOM revision, scale/meter calibration and yield reconciliation
cp_calibration_media	electronics_calibration	methane and carbon-dioxide calibration gases	cylinder receipt, pressure or mass record and calibration log	gas identity; purity; cylinder start/end mass or pressure; reference conditions; vent/recovery status; lot id	Use cylinder mass balance or calibrated gas-flow measurement	kg	each cylinder change and lot	same period as calibration records	each calibration line	Subtract returned or recovered quantity, assign consumed quantity to calibrated accepted parts and normalize	supplier certificate, cylinder record, instrument calibration and leak check
cp_final_release	final_assembly_packing	assembly electricity, corrugated boxes and reference product	submeter/equipment log, packaging issue, scale and release records	electricity; box mass; conforming product net mass; rejects; drawing/model; release status; lot id	Reconcile final-operation inputs with calibrated net product weights and quality release	MJ and kg	each lot	same period as all input records	each reporting site	Sum released net product mass, keep packaging separate, allocate final electricity and normalize all values	scale/meter calibration, packing specification, release certificate and mass-balance review

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calc_normalize_reference_mass	Every inventory row	Normalized amount = lot amount / conforming finished-part net mass; report per 1 kg reference product.	lot flow amount; finished_meter_part net mass	normalized inventory amount
calc_pure_naoh	sodium_hydroxide	Pure NaOH equivalent = purchased solution mass × supplier-declared NaOH mass fraction.	solution mass; NaOH mass fraction	kg sodium hydroxide
calc_direct_fossil_co2	fossil_carbon_dioxide	Direct fossil CO2 = natural-gas quantity × documented combustion factor × oxidation factor × fossil fraction, with compatible units and reference conditions.	natural_gas; factor; oxidation factor; fossil fraction	kg direct fossil carbon dioxide
calc_material_balance	Material-route validation	For each material, reconcile gross input = incorporated material + outward segregated scrap + measured other losses ± inventory change; investigate unexplained residuals.	material input; product composition; scrap; other loss; stock change	material-balance residual and completeness finding

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	Reference product	Host-instrument family, part name/function, drawing or model, principal material, route and release criteria must be traceable to the reported lot.	approved drawing, BOM, specification and release record
dq_temporal_alignment	All foreground rows	Inputs, outputs and allocation drivers must cover the same representative production period; shorter campaigns must include all produced lots and disclose the period.	period reconciliation and lot register
dq_measurement_control	Metered and weighed rows	Use calibrated instruments or disclose estimation; preserve source units, reference conditions and conversion factors.	calibration certificates, raw meter/scale records and conversion workbook
dq_completeness	Process map and inventory	Declare each process and atomic row as included, not applicable or unresolved; reconcile material, water and energy records to site or line totals.	completeness matrix, mass balances and invoice reconciliation
dq_supplier_matching	Purchased inputs	Match upstream datasets to material grade, product state, supplier geography and technology; document proxies as data-quality limitations.	supplier specification and dataset selection record
dq_uncertainty_disclosure	Rows without external ranges	Retain foreground variability statistics when multiple lots exist and disclose that this PCR provides no external quantitative range.	lot-level dataset, summary statistics and review note

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_identity_and_reference	Product and reference flow	Confirm that output is a separately marketed part/accessory for a declared CPC 48263 or 48264 host good, that complete instruments are excluded and that results are normalized to 1 kg net conforming output.	un-cpc-3-0-2025
validate_atomic_inventory	Process inventory	Confirm every selected flow is one atomic physical, chemical, waste, energy or elementary exchange and every conditional row states its route applicability.
validate_uuid_and_units	UUID-bearing rows	Confirm UUID, public state 100 identity, flow type, property, unit group and Chinese baseName; leave unresolved identities blank rather than substituting proxies.
validate_process_coverage	Process map	Confirm both required processes are represented and the conditional electronics/calibration process is included exactly when its condition applies.
validate_balances	Materials, water and fuel	Review material-balance residuals, water input versus wastewater and retained/evaporated water, and natural-gas use versus direct fossil CO2 calculation; explain material residuals rather than forcing closure.
validate_allocation_and_boundary	Shared operations and system boundary	Confirm shared burdens use documented causal drivers, upstream purchased-input datasets are linked, downstream life-cycle stages are excluded and no avoided-recycling credit is embedded in foreground amounts.
validate_range_disclosure	Quantitative QA	Confirm that foreground values are not presented as source-backed external ranges and that unresolved important-flow range evidence needs remain disclosed until two independent compatible original sources are reviewed.

10. Published Dataset Profile

Field	Value
dataset_role	Foreground production dataset for one declared dedicated meter/counter part or accessory at the factory gate
downstream_use	secondary_dataset; background_dataset after review for representativeness and aggregation
allowed_use	Product-specific or supplier/site-specific LCA of parts and host instruments when identity, route, geography, technology, time and allocation are compatible
excluded_use	Complete instruments; unrelated precision-instrument parts; service-life or functional-equivalence comparisons without additional performance evidence; generic substitution across materially different parts
required_metadata	canonical PCR id; CPC reference; host-instrument family; part function and drawing/model; material grades; manufacturing route; electronics and calibration status; geography; period; net reference mass; packaging status; upstream dataset matches; allocation drivers; unresolved UUIDs
required_quality_disclosure	Primary-data share; measurement and estimation methods; temporal coverage; material/water/energy balance findings; supplier-data gaps; allocation; scrap destination; wastewater treatment state; unresolved range evidence; uncertainty and variability
update_trigger	Change in host-instrument compatibility, drawing or BOM, principal material, electronics design, fabrication technology, calibration medium, supplier geography, energy mix, allocation method, packaging, or a material change in measured foreground performance

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-2025	Official guidance (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 and hash-verified 2026-09-07)	Official CPC 48283 product identity and scope linkage to goods of subclasses 48263 and 48264; not used for inventory amounts or ranges