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Equipment Management
Tracking and maintaining laboratory equipment to ensure reliability and compliance.
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Molbloc/Molbox Flow Measurement System
Mass flow reference standards and measurement terminal for the calibration laboratory.

Equipment Management
Tracking and maintaining laboratory equipment to ensure reliability and compliance.
- Equipment Master List
  Centralized database of all laboratory equipment.
  - Ambient-Monitoring
    Equipment category: Ambient-Monitoring
  - Electrical
    Equipment category: Electrical
  - Molbloc/Molbox Flow Measurement System
    Mass flow reference standards and measurement terminal for the calibration laboratory.
    - Initial Setup
      Setup and connection procedures for the molbloc/molbox system.
    - Power-Up & Verification
      Power-on sequence and self-test verification for the molbox terminal.
    - Operation — Molbloc-L
      Operating information for laminar flow element (molbloc-L) measurements.
    - Operation — Molbloc-S
      Operating information for sonic nozzle (molbloc-S) measurements.
    - Cleaning
      Cleaning procedures for the molbloc/molbox system.
    - Molbloc-L
      Equipment category: Molbloc-L
    - Molbloc-S
      Equipment category: Molbloc-S
    - Molbox
      Equipment category: Molbox
- Intermediate Equipment Checks
  Procedure for verifying equipment performance between calibration cycles using pairwise E_n comparisons, per ISO 17025 clause 6.4.10.
- Defective Equipment & Non-Conformance Reporting
  Procedure for identifying, quarantining, and resolving nonconforming equipment, and for assessing the impact of equipment defects on previously issued calibration results.
- Access Control & Equipment Security Measures
  How the laboratory restricts and monitors physical access to protect equipment integrity and measurement validity.
- Storage & Handling Guidelines
  Requirements for proper storage, transport, and handling of laboratory equipment to prevent contamination, deterioration, and damage.
- Equipment Labeling
  Defines the laboratory's equipment label types, their content, and when to apply or remove them. Every piece of equipment in the laboratory carries exactly one status label at all times.

Molbloc/Molbox Flow Measurement System

Author:Matthias Boularot

Created on:24 Feb 2026

Mass flow reference standards and measurement terminal for the calibration laboratory.

The molbloc/molbox system is the laboratory's primary reference for mass flow calibrations. A molbox terminal reads pressure and temperature from a connected molbloc flow element and computes the reference mass flow rate from the element's calibration coefficients.

The system comprises three equipment sub-categories:

Molbox — molbloc terminals housing internal pressure transducers (RPTs), the high-accuracy ohmic measurement circuit, and the computation engine.
Molbloc-L — laminar flow elements for the range 10 SCCM to 10 SLPM.
Molbloc-S — sonic nozzle (venturi) elements for the range 25 SLPM to 1000 SLPM.

For detailed operating procedures, see the topics listed below. The manufacturer manual is the authoritative reference for all operating procedures: Molbox+ / molbloc System Manual (PDF)