← Schemas · R50

The R50 schema

OIML R50 (Continuous Totalising Automatic Weighing Instruments) Certificate Schema. The certificate structure lists the top-level fields of the document model. The definitions expand the family's own vocabulary. Where the corpus carries fill statistics, the observed fields table shows how often each characteristic actually appears.

Certificate structure

Every R50 certificate is one object with these top-level fields. A "core" shape is shared across all Recommendation families; the rest are defined by this family's own definitions below.

Field	Shape	Required
certificate	core · Certificate	yes
issuing_authority	core · IssuingAuthority	no
applicants	core · PartyList	no
manufacturers	core · PartyList	no
certified_type	CertifiedType	yes
characteristics	Characteristics	yes
recommendation	object	yes
test_reports	core · TestReportList	no
revision_history	core · RevisionHistory	no
model_family	core · ModelFamily	no
components	array of core · Component	no
footnotes	core · FootnoteList	no
matrix_tables	MatrixTableList	no
d011_tests_applicable	array of D011TestReference	no

Observed fields

From 5 digitalized R50 certificates: how often each type-level characteristic appears (fill rate), in how many certificates, and the most common values observed.

Field	Fill rate	Present in	Common values
power_supply_voltage	80%	4
totalisation_scale_interval	80%	4
maximum_flow_rate	80%	4
minimum_flow_rate	80%	4
power_supply_frequency	60%	3	50, 50
weigh_length	60%	3
humidity_class	60%	3
accuracy_class	60%	3	I
maximum_capacity	60%	3
temperature_range	60%	3	min=-10, max=40
power_supply_type	40%	2	AC
sigma_min	40%	2	Dependent upon application
operating_speed	40%	2	min=0.4, max=5.0, min=0.5, max=3.5
load_cells_excitation_voltage	40%	2	8, 5
minimum_load_cell_impedance	40%	2	75, 87.5
maximum_load_cell_impedance	40%	2	1100, 1100
minimum_input_voltage_per_verification_scale_interval	40%	2	3.13, 2.5
minimum_dead_load_voltage	40%	2
measuring_range	40%	2	6.88, 5
electromagnetic_environment_class	40%	2	E2
load_cell_cable	40%	2	4wire and screen, 4-wire and shield
belt_speed	40%	2	min=0.5, max=5.2, min=0.2, max=0.5
qmin_reference	20%	1	Qmax
climatic_environment_condition	20%	1	Non-condensing(closed)
minimum_totalised_load	20%	1	3.6t
maximum_pulse_frequency	20%	1	1000
power_supply_dc	20%	1	24
embedded_software_identification	20%	1	WIM3-7.4-20230824
weigh_length_wl	20%	1	16
belt_speed_v	20%	1	2
totalisation_scale_interval_d	20%	1	10
minimum_totalized_load_sigmin	20%	1	24
software_identification	20%	1	Ver 2.3
material	20%	1	Bulk material (the ceramic particles were used for in-situ product tests during type evaluation)
reduction_ratio	20%	1	0.5
belt_length	20%	1	4

Definitions

The shapes named by the certificate structure above, expanded to their fields.

AccuracyClass

CertifiedType

category	string	required
type_designations	array of string	required
module_designation	string or null
description	string or null

Characteristics

type_level	object
model_level	array of ModelLevelEntry
config_level	array of ConfigLevelEntry

ModelLevelEntry

attribute	string	required
unit_symbol	string or null
unit_id	string or null
values	array of object	required

ConfigLevelEntry

attribute	string	required
axis	object	required
unit_symbol	string or null
unit_id	string or null
values	array of object	required

MatrixTableList

D011TestReference

test_id	string	required
test_level_index	integer
notes	string