Materials & Components
Key components are checked against approved specifications before production release.
- PCB and chips
- Terminals and sensors
- Display, relay and housing
Quality Assurance
Energy Meter Quality Assurance System
YTL controls energy meter quality from incoming materials and first article approval to in-process control, calibration, final verification and outgoing inspection.
IQC FAI IPQC FQC OQC
Quality Process
One controlled flow from materials to shipment
Incoming Control
Materials, PCBs, terminals, housings, sensors, displays and key components are checked before production.
First Article
First units are verified against approved model, firmware, label, wiring and packaging requirements.
In-Process
Process checks cover PCB assembly, product assembly, programming, calibration and function testing.
Final Control
Metering accuracy, functions, communication, appearance and configuration are verified before release.
Outgoing
Shipment checks cover model, quantity, serial number, accessories, documentation and packaging.
CAPA
Corrective and preventive improvement
Nonconformance analysis, quality data review and improvement actions support stable repeat production.
Inspection Focus
What YTL checks during production
Appearance & Mechanics
External structure and assembly details are reviewed before shipment.
- Housing and terminals
- DIN-rail installation
- Labels and dimensions
Accuracy & Electrical
Test points and acceptance criteria vary by product model and applicable standard.
- Active / reactive energy
- Voltage, current and power
- Starting current and meter constant
Function & Communication
Depending on model and project configuration.
- LCD, keys, pulse and relay
- RS485, Modbus, DLMS/COSEM
- Wireless and data reading
Safety & Configuration
Production-stage checks cover basic safety, rated parameters and project configuration.
- Rated parameters
- Firmware and address
- Wiring and configuration files
Label & Packaging
Important for ODM projects and repeat delivery consistency.
- Model, serial number and barcode
- Customer brand and packaging
- Manuals and shipment files
Selected products and project configurations may undergo EMC, environmental, safety and reliability verification according to applicable requirements.
View Laboratory Testing CapabilitiesProject Quality
Project, batch and traceability control
01 / Project Baseline
Approved requirements become the production reference
For ODM and project orders, the approved sample, specification, drawing, firmware, label and packaging files form the baseline before batch release.
Approved sample
Confirmed physical sample and first article reference.
Technical files
Specification, wiring, firmware and communication settings.
Label and packaging
Customer brand, barcode, manuals and carton requirements.
Release review
Critical requirements are checked before production starts.
02 / Batch Consistency
Repeat orders follow controlled product versions
Production and inspection activities follow the approved product version and customer-specific requirements to reduce variation across repeat deliveries.
Version review
Hardware, firmware and configuration are reviewed before repeat production.
Material control
Key components and substitutions are controlled through approved procedures.
Inspection records
Calibration and final inspection records are retained by requirement.
Shipment check
Quantity, model, serial numbers and accessories are verified before delivery.
03 / Traceability
Product history can be traced by model, batch and serial number
Traceability supports project consistency, repeat orders and controlled changes across materials, firmware, labels and documentation.
Model and serial number
Products are identified through model, serial number and batch information.
Production records
Production, calibration, inspection and shipment records are maintained.
Version control
Hardware, firmware and communication settings are controlled by version.
Engineering change
Changes are evaluated through controlled procedures.
04 / Quality Management
Quality procedures support production and corrective action
The quality system covers product development, production, inspection, documentation, measuring equipment and nonconforming product control.
Measuring equipment
Inspection and measuring equipment is managed and verified according to procedures.
Nonconforming product
Nonconforming materials and products are identified, isolated and reviewed.
CAPA
Quality issues are analyzed and corrective or preventive actions are reviewed.
Documentation
Quality procedures and records support audit and project requirements.
Product certification and compliance documentation varies by model, hardware version, target market and certificate scope. View Certificates by Model
Capability Gateway
Continue your audit path
Manufacturing Factory
Production, assembly, calibration, aging and batch-delivery capabilities.
View Manufacturing CapabilityCNAS-Accredited Laboratory
Metering, EMC, environmental, communication, safety and reliability verification within applicable scope.
View Laboratory CapabilityCertificates by Model
Product- and model-specific certificates, declarations and compliance documents.
View Certificates