---
certificate:
  number: R137/2012-A-CZ1-2023.01
  scheme: A
  page_total: 6
  member_state: Czech Republic
  date_issued: '2023-06-09'
  oiml_issuer_id: CZ1
issuing_authority:
  name: Czech Metrology Institute
  address_lines:
  - Okružní 31
  - 638 00 Brno
  - Czech Republic
  person_responsible: Jan Kalandra
  oiml_issuer_id: CZ1
applicants:
- name: Zhejiang Songchuan Instrument Technology Co., Ltd.
  address_lines:
  - No.1 Luhai Road, Eastern New District
  - 317511 Wenling, Taizhou City
  - Zhejiang, China
manufacturers:
- name: Zhejiang Songchuan Instrument Technology Co., Ltd.
  address_lines:
  - No.1 Luhai Road, Eastern New District
  - 317511 Wenling, Taizhou City
  - Zhejiang, China
certified_type:
  category: diaphragm gas meter
  type_designations:
  - JBD1.6-SA
  - JBD2.5-SA
  - G1.6
  - G2.5
  module_designation: N/A
characteristics:
  type_level:
    accuracy_class:
      value: '1.5'
    cyclic_volume:
      value: 0.9
      unit_symbol: dm³
      unit_id: u:liter
    minimum_pressure:
      value: 0
      unit_symbol: bar(g)
      unit_id: u:bar
    maximum_pressure:
      value: 0.5
      unit_symbol: bar(g)
      unit_id: u:bar
    temperature_range:
      value:
        min: -25
        max: 55
      unit_symbol: "°C"
      unit_id: u:degree_Celsius
    gas_temperature_range:
      value:
        min: -25
        max: 55
      unit_symbol: "°C"
      unit_id: u:degree_Celsius
  model_level:
  - attribute: maximum_flow_rate
    unit_symbol: m³/h
    values:
    - model: G1.6
      value: 2.5
    - model: G2.5
      value: 4.0
    unit_id: u:cubic_meter_per_hour
  - attribute: transitional_flow_rate
    unit_symbol: m³/h
    values:
    - model: G1.6
      value: 0.25
    - model: G2.5
      value: 0.4
    unit_id: u:cubic_meter_per_hour
  - attribute: minimum_flow_rate
    unit_symbol: m³/h
    values:
    - model: G1.6
      value: 0.016
    - model: G2.5
      value: 0.025
    unit_id: u:cubic_meter_per_hour
  - attribute: cyclic_volume
    unit_symbol: dm³
    values:
    - model: G1.6
      value: 0.9
    - model: G2.5
      value: 0.9
    unit_id: u:liter
  - attribute: maximum_permissible_pressure_loss
    unit_symbol: Pa
    values:
    - model: G1.6
      value: 200
    - model: G2.5
      value: 200
    unit_id: u:pascal
  - attribute: maximum_pressure
    unit_symbol: kPa
    values:
    - model: G1.6
      value: 50
    - model: G2.5
      value: 50
    unit_id: u:pascal
  config_level: []
recommendation:
  id: R137
  edition: 2012
  amendment: 2014
  scheme: A
  accuracy_classes:
  - '1.5'
test_reports: []
revision_history:
- revision: "-"
  date: '2023-06-09'
  changes: Issuing Certificate
model_family:
  family_name:
  models:
  - model_id: G1.6
  - model_id: G2.5
matrix_tables:
- name: Flow characteristics by size
  columns:
  - size
  - qmax
  - qt
  - qmin
  - cyclic_volume
  - maximum_permissible_pressure_loss
  - pmax
  rows:
  - size:
      value: G2.5
    qmax:
      value: 4.0
    qt:
      value: 0.4
    qmin:
      value: 0.025
    cyclic_volume:
      value: 0.9
    maximum_permissible_pressure_loss:
      value: 200
    pmax:
      value: 50
  - size:
      value: G1.6
    qmax:
      value: 2.5
    qt:
      value: 0.25
    qmin:
      value: 0.016
    cyclic_volume:
      value: 0.9
    maximum_permissible_pressure_loss:
      value: 200
    pmax:
      value: 50
  description: Flow characteristics for different gas meter sizes
  footnotes: []
_traceability:
  raw_labels:
    gas_temperature_range: gas_temperature_range