Rangefinders, theodolites and tachymeters (tacheometers) and levels

1. Scope and Applicability

This PCR covers factory-gate production of complete rangefinders, theodolites, electronic tacheometers/total stations, and optical, compensator, digital, or laser levels used for distance, angle, coordinate, or elevation measurement. The product is a complete tested instrument in its saleable packaging. Tripods, staffs, prisms sold separately, GNSS receivers, photogrammetric instruments, handheld tapes and callipers, and surveying services are excluded. Use and end-of-life are outside the default gate.

2. Product Category Identity

Field	Value
canonical_pcr_id	pcr.metal-products-machinery-and-equipment.medical-appliances-precision-and-optical-instruments-watches-and-clocks.rangefinders-theodolites-and-tachymeters-tacheometers-and-levels
classification_refs	CPC 3.0 48212, Rangefinders, theodolites and tachymeters (tacheometers) and levels
covered_products	complete rangefinders; theodolites; tacheometers/electronic tacheometers/total stations; spirit, compensator, digital and laser surveying levels
excluded_products	separately sold tripods, staffs and prisms; GNSS receivers; photogrammetric instruments; handheld length gauges; surveying services
representative_product	one complete total station with its installed battery when supplied and its corrugated-board sales box
production_route	receipt of specified materials and components; housing fabrication where performed; optical/electronic integration; assembly; calibration and functional test; packaging
market_state	accepted, calibrated, saleable instrument at the manufacturing site gate

3. Reference Flow

Field	Value
What	provision of a complete surveying instrument capable of the declared distance, angle, coordinate, or elevation measurement function
How much	one saleable instrument
How well	accepted against the manufacturer's declared model specification and applicable precision verification procedure
How long or cycle	one production output at the factory gate; service life is declared metadata and is not normalized by this cradle-to-gate PCR
reference_flow_link	finished_surveying_instrument

Field	Value
Reference amount	1 Item(s)
Reference product flow	Rangefinder, theodolite, tacheometer/total station, or level
Reference flow property	Number of items 01846770-4cfe-4a25-8ad9-919d8d378345
Reference unit group	Units of items 5beb6eed-33a9-47b8-9ede-1dfe8f679159
Reference unit	Item(s)
Required qualifiers	instrument family; manufacturer and model; measurement function; optical/digital/laser configuration; declared precision or uncertainty; included battery and accessories; net instrument mass; packaging configuration; manufacturing site and geography; production period; factory gate

When constructing a foreground data package, every required qualifier must be declared in dataset metadata, process notes, the reference-flow comment, the product description, or an equivalent field. The reference-product UUID remains unresolved and must not be replaced by a broader surveying-instrument flow.

4. Measurement and Unit Rules

rule_id	Applies to	Required property	Required unit	Rule
reference_item_count	accepted finished surveying instrument	Number of items 01846770-4cfe-4a25-8ad9-919d8d378345	Item(s)	Normalize the dataset to exactly one accepted saleable instrument; rejected or reworked units are not reference output.
material_mass_measurement	aluminium alloy, optical components, printed wire board and corrugated-board box inputs	Mass 93a60a56-a3c8-11da-a746-0800200b9a66	kg	Record net mass crossing the foreground boundary and exclude reusable transport packaging unless it is transferred with the product.
electricity_energy_conversion	purchased electricity	Net calorific value 93a60a56-a3c8-11da-a746-0800200c9a66	MJ	Preserve the metered electricity quantity and convert kWh to MJ using 1 kWh = 3.6 MJ; do not add upstream generation emissions as foreground elementary flows.
battery_item_count	installed lithium-ion battery	Number of items 01846770-4cfe-4a25-8ad9-919d8d378345	Item(s)	Count only batteries transferred with the reference product and disclose rated capacity, chemistry and pack configuration.

5. System Boundary

rule_id	Applies to	Rule	source_ids
boundary_factory_gate	foreground manufacturing	Include receipt and issue of listed materials and components, directly controlled housing work, optical/electronic integration, assembly, calibration, functional testing and saleable packaging through the manufacturing-site gate.	un-cpc-3-0-structure-2025
boundary_upstream_inputs	purchased inputs	Link each purchased material, component, battery, electricity and packaging input to a geographically and technologically representative upstream dataset; do not restate upstream emissions as foreground exchanges.
boundary_quality_test	calibration and functional testing	Retain model-specific calibration, functional-test, precision-test and acceptance evidence; identify the applied test procedure and do not represent a partial precision check as comprehensive product acceptance.
boundary_exclusions	default study boundary	Exclude capital equipment, buildings, employee travel, product use, maintenance and end-of-life unless the declared study scope explicitly includes them.

Boundary Abstraction

Field	Value
declared_starting_condition	specified materials and components received at the instrument manufacturing site
starting_condition_role	foreground manufacturing input condition
product_classification_scope	complete goods in CPC 3.0 48212; separately supplied parts and accessories remain outside this product identity
recursive_input_rule	a complete CPC 48212 instrument received for integration or resale is recorded as a same-category product input with its upstream dataset and is not recursively decomposed inside this foreground process
upstream_dataset_requirement	each purchased input requires a supplier-specific dataset when available, otherwise a documented representative dataset matching material/component state, geography and technology
disclosure	declare make-or-buy boundary, model and instrument family, manufacturing geography, production period, included battery/accessories, packaging configuration, test procedure, allocation and data coverage

6. Process Inventory Structure

Process Map

process_id	process_name	inclusion	inclusion_condition	role	quantitative_reference
instrument_fabrication_assembly_test_packaging	Instrument fabrication, assembly, testing and packaging	required		foreground production	one accepted saleable surveying instrument

Process: Instrument fabrication, assembly, testing and packaging (instrument_fabrication_assembly_test_packaging)

Inputs

Product flows

Aluminium alloy for structural instrument parts (aluminium_alloy_input)

Record aluminium alloy consumed in housings, frames or structural parts made within the declared foreground boundary.

• Selected flow: Aluminium alloy d2335464-e0fd-574c-b56f-83fdf8c65b0c
• Flow property / unit: Mass / kg
• Amount rule: measured issued mass minus verified returned reusable stock, normalized to accepted instrument output
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 accepted saleable surveying instrument
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_component_issue
• Sources:

Optical components incorporated in the instrument (optical_components_input)

Record the mass of optical component blanks or finished optical components transferred into the instrument; declare the supplied state.

• Selected flow: Optical components 1b76ef84-1faf-4be8-9f8a-0dbc2b56a030
• Flow property / unit: Mass / kg
• Amount rule: measured or supplier-declared net mass incorporated in accepted instruments
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 accepted saleable surveying instrument
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_component_issue
• Sources:

Printed wire board incorporated in the instrument (printed_wire_board_input)

Record the mass of each printed wire board crossing the foreground boundary, aggregated for the reference model.

• Selected flow: Printed Wire Board a8bd954c-59b3-4317-b4de-02a17d6da5ca
• Flow property / unit: Mass / kg
• Amount rule: supplier-declared or measured net board mass multiplied by boards installed in accepted instruments
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 accepted saleable surveying instrument
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_material_component_issue
• Sources:

Lithium-ion battery transferred with the instrument (lithium_ion_battery_input)

Include this flow only for a model delivered with a rechargeable lithium-ion battery; models without such a battery record the row as not applicable in the produced dataset.

• Selected flow: Lithium Ion Battery 5554faa4-1ae2-459a-959a-b2180ab3cedc
• Flow property / unit: Number of items / Item(s)
• Amount rule: count batteries installed in or packaged with accepted instruments
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 accepted saleable surveying instrument
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_material_component_issue
• Sources:

Purchased electricity used in foreground manufacturing (electricity_input)

Record purchased electricity used for machining, assembly, environmental control, charging, calibration, testing and packaging inside the declared foreground boundary.

• Selected flow: Electricity 890a70b7-b677-4e2a-8a1b-7d017e0a10ae
• Flow property / unit: Net calorific value / MJ
• Amount rule: metered kWh attributable to the process multiplied by 3.6 and normalized to accepted instrument output
• Value mode: Calculated value (calculated_value)
• Specificity: Site-specific (site_specific)
• Normalization basis: per 1 accepted saleable surveying instrument
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_electricity_metering
• Sources:

Corrugated-board sales box transferred with the instrument (corrugated_board_box_input)

Record only the corrugated-board box transferred with the reference product; reusable inbound crates are excluded from this row.

• Selected flow: corrugated board boxes 4f197bec-7b3b-11dd-ad8b-0800200c9a66
• Flow property / unit: Mass / kg
• Amount rule: measured or supplier-declared net box mass multiplied by boxes transferred with accepted instruments
• Value mode: Calculated value (calculated_value)
• Specificity: Product-specific (product_specific)
• Normalization basis: per 1 accepted saleable surveying instrument
• Basis kind: Reference flow (reference_flow)
• Evidence kind: Calculated from collection (calculated_from_collection)
• Collection protocol: cp_packaging_issue
• Sources:

Waste flows

Elementary flows

Outputs

Product flows

Accepted packaged surveying instrument (finished_surveying_instrument)

Record each complete instrument only after model-specific calibration, functional test and acceptance; the unresolved Tiangong product-flow UUID remains empty.

• Selected flow: Rangefinder, theodolite, tacheometer/total station, or level
• Flow property / unit: Number of items / Item(s)
• Amount rule: counted accepted packaged instruments
• Value mode: Foreground record (foreground_record)
• Specificity: Product-specific (product_specific)
• Normalization basis: process output reconciled to the reference amount of 1 Item(s)
• Basis kind: Process output (process_output)
• Evidence kind: Collected record (collected_record)
• Collection protocol: cp_finished_instrument_acceptance
• Sources:

Waste flows

Elementary flows

7. Allocation and Co-product Handling

rule_id	Applies to	Rule	source_ids
allocation_subdivide_models	multiple instrument models or product families	Prefer model-, batch- or line-level subdivision using BOM, issue, meter and accepted-output records.
allocation_shared_operations	shared electricity and common operations	When subdivision is not feasible, allocate shared burdens using a documented causal driver such as machine time, test time or occupied production time; disclose the driver and perform a sensitivity check against item-count allocation.
allocation_rework_scrap	rework, rejects and recyclable scrap	Assign rework burdens to the accepted output that required them; record any exported recyclable material as a separate waste or co-product exchange and disclose the applied cut-off or substitution convention without netting it from input quantities.

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_material_component_issue	instrument_fabrication_assembly_test_packaging	aluminium alloy, optical component, printed wire board and battery inputs	BOM, supplier specification, receipt and issue records	model; part id; flow identity; supplied state; quantity; net mass where mass-based; return quantity; accepted output count	reconcile approved BOM with calibrated weighing or supplier net-mass data and issue/return records	kg or Item(s)	per lot or production batch	representative continuous 12-month period or full shorter campaign	declared manufacturing site and model	sum net issues by atomic flow and divide by accepted output count	approved BOM revision; supplier specification; scale calibration; issue and return records
cp_electricity_metering	instrument_fabrication_assembly_test_packaging	purchased electricity	electricity meter and production-time records	meter id; opening and closing reading; kWh; process share; allocation driver; accepted output count	dedicated submeter where available, otherwise reconcile facility meter to documented causal allocation	kWh	monthly and each production campaign	representative continuous 12-month period or full shorter campaign	declared foreground process at the manufacturing site	sum attributable kWh, multiply by 3.6 MJ/kWh and divide by accepted output count	meter calibration or utility invoice reconciliation; allocation worksheet
cp_packaging_issue	instrument_fabrication_assembly_test_packaging	corrugated-board sales box	packaging BOM and issue records	box specification; quantity issued; net mass per box; returned quantity; accepted output count	reconcile packaging BOM with supplier mass declaration or calibrated weighing and issue records	kg	per packaging lot or batch	representative continuous 12-month period or full shorter campaign	declared packaging operation	net box mass issued divided by accepted output count	packaging specification; scale calibration; issue record
cp_finished_instrument_acceptance	instrument_fabrication_assembly_test_packaging	accepted packaged surveying instrument	calibration, functional-test and release records	serial number; model; instrument family; test procedure; result; accepted or rejected state; acceptance date; packaging configuration	count unique serial-numbered units passing the declared model acceptance procedure	Item(s)	each unit	representative continuous 12-month period or full shorter campaign	declared assembly and test operation	count accepted units only and reconcile to inventory, sales-release and rework records	signed or electronic test record; calibration status; release record

Calculation Rules

rule_id	Applies to	Formula or rule	Inputs	Output	source_ids
calculate_net_material_per_item	mass-based material and component inputs	(issued mass - verified returned mass) / accepted finished instruments	cp_material_component_issue; cp_finished_instrument_acceptance	kg input per Item(s) reference flow
calculate_battery_items_per_item	lithium-ion battery input	batteries transferred with accepted instruments / accepted finished instruments	cp_material_component_issue; cp_finished_instrument_acceptance	Item(s) battery per Item(s) reference flow
calculate_electricity_per_item	purchased electricity	attributable metered kWh × 3.6 / accepted finished instruments	cp_electricity_metering; cp_finished_instrument_acceptance	MJ electricity per Item(s) reference flow
calculate_box_mass_per_item	corrugated-board box input	net box mass issued / accepted finished instruments	cp_packaging_issue; cp_finished_instrument_acceptance	kg box per Item(s) reference flow

Data Quality Requirements

requirement_id	Applies to	Requirement	Evidence
dq_product_identity	reference product	Identify instrument family, manufacturer, model, measurement function, included battery/accessories, packaging and serial-number population; do not mix models without disclosed subdivision or allocation.	BOM revision, model specification and release records
dq_temporal_coverage	foreground inventory	Use a representative continuous 12-month period; a shorter complete production campaign is allowed only when dates, seasonality and representativeness are disclosed.	dated meter, issue, production and acceptance records
dq_mass_energy_traceability	material, component, packaging and electricity rows	Retain calibrated measurement, supplier specification or invoice evidence and reconcile issue, return and allocation records to the declared site boundary.	calibration certificates, supplier declarations, invoices and reconciliation worksheets
dq_test_traceability	finished instrument output	Retain the declared test procedure, calibration status, result and acceptance state for each counted output; distinguish a partial precision check from comprehensive acceptance testing.	serial-numbered test and release record; controlled test-procedure identifier and revision
dq_completeness	all foreground exchanges	Report any additional model-specific atomic material, component, consumable, waste or direct-emission exchange that is material to the declared study even when it is not a predefined row in this PCR.	BOM-to-inventory reconciliation and documented completeness review

9. Validation Rules

rule_id	Applies to	Rule	source_ids
validate_reference_output	reference flow and finished output	Exactly one accepted saleable instrument must be the normalized reference output; rejected, reworked or incomplete units must not be counted.
validate_uuid_identity	UUID-bearing exchanges	Verify each UUID against the declared flow name, flow type, property and unit group; keep the reference-product UUID empty until an exact CPC 48212 instrument flow is confirmed.
validate_bom_completeness	foreground inventory	Reconcile listed and additional atomic inputs to the approved model BOM, packaging BOM, issue/return records and accepted output population; disclose omitted exchanges and cut-off rationale.
validate_electricity	purchased electricity	Reconcile attributable electricity to meter or invoice totals, preserve the allocation driver and verify the 3.6 MJ/kWh conversion.
validate_test_evidence	finished surveying instrument	Confirm that the declared model-specific acceptance evidence exists, identifies the applied test procedure and covers the instrument functions represented by the declared product specification.
validate_range_status	important flows	Do not substitute an external default range for missing foreground data while the manifest records an unresolved range-evidence need.

10. Published Dataset Profile

Field	Value
dataset_role	unit_process
downstream_use	secondary_dataset; background_dataset
allowed_use	cradle-to-gate datasets for complete CPC 48212 surveying instruments matching the declared family, model, technology, included accessories, packaging, geography and production period
excluded_use	separately supplied accessories, other surveying instruments, use-stage services, maintenance or end-of-life without an explicitly extended boundary
required_metadata	PCR id; instrument family; manufacturer and model; measurement function; precision or uncertainty declaration; test procedure; included battery/accessories; net mass; packaging; geography; site; production period; make-or-buy boundary; allocation; reference-product UUID status
required_quality_disclosure	record coverage; measurement and supplier-data basis; meter allocation; model mixing; additional exchanges; cut-offs; unresolved UUID and range evidence; deviations from the required protocols
update_trigger	material change in product identity, technology, BOM, battery or packaging configuration, manufacturing site, allocation, test procedure, source evidence or Tiangong flow identity

11. Data Sources

Source id	Type	Reference	Used for
un-cpc-3-0-structure-2025	official_guidance	https://unstats.un.org/unsd/classifications/Econ/Download/In%20Text/CPC_Ver_3.0_Structure_30Jun2025.csv	official CPC 3.0 classification identity and category boundary
samr-total-station	standard	https://std.samr.gov.cn/gb/search/gbDetailed?id=JiO74cSBHwA%3D&mode=p	verified Chinese term 全站仪
samr-electronic-theodolite	standard	https://std.samr.gov.cn/gb/search/gbDetailed?id=71F772D82B27D3A7E05397BE0A0AB82A	verified Chinese term 电子经纬仪 and national-standard catalogue context