Scale Calibration Services

Yes. We offer a digital system/portal option to help customers manage:

• Certificates and service reports in one place

• Asset registers (equipment list, IDs, locations, serial numbers)

• Calibration/service due dates and reminders

• Visit history and audit-ready document retrieval

We maintain traceability through a controlled, auditable process that typically includes:

• Use of calibrated reference standards with documented traceability to recognised national/international standards

• Unique identification for customer assets (e.g., asset ID/serial number), linked to each visit, certificate, and service record

• Controlled procedures for measurement, uncertainty reporting (where applicable), and record retention

• Technician/engineer job records capturing environmental conditions and test configuration where relevant

• Certificate numbering and version control to protect the integrity of the documentation over time

Yes. After calibration and/or service, we provide formal documentation appropriate to the work completed. This typically includes:

• Calibration certificates (UKAS-accredited where applicable and within scope, or non-UKAS where requested/appropriate)

• Service reports detailing findings, actions taken, parts replaced (if any), and functional checks

• “As found / as left” results where relevant, so you have a clear audit trail of performance before and after work

Yes. We support both:

• Planned preventative maintenance / service contracts (scheduled visits, agreed service levels, etc.).

• One-off visits (no contract required).

Yes. MWS engineers support multiple models and brands and can repair and calibrate equipment beyond the original manufacturer, subject to application, condition, and calibration scope.

We cover a wide range of equipment from major manufacturers such as the following, plus many more smaller brands.

• Mettler Toledo

• Ohaus
• Dini Argeo

• Avery Weigh-Tronix 

• Kern & Sohn

• Sartorius

• Minebea Intec 

• A&D Weighing (A&D Company) 

• Adam Equipment 

• Rice Lake Weighing Systems

• Bizerba

• Calibration: determining and reporting measurement performance (metrological values) on a calibration certificate. UKAS guidance is explicit that calibration is not verification and not adjustment.

• Verification (legal / trade approval context): a conformity process for trade-use NAWI that can only be performed by approved/notified bodies; MWS is certified for initial verification and re-verification activities for non-automatic weighing instruments.

• Adjustment: changing the instrument to bring it closer to nominal performance; guidance notes that adjustment can invalidate existing calibration results for that system.

Calibration frequency should be set by risk (usage, criticality, environment, audit/regulatory requirements). In practice, most customers use annual calibration, and higher-criticality applications often use 6-monthly visits. MWS service proposals and contracts commonly reflect both 12-monthly and 6-monthly service intervals, but can be tailored to each clients requirements.

Yes. Micro Weighing Solutions (MWS) is UKAS accredited to ISO/IEC 17025 (UKAS Calibration Laboratory No. 9617) and issues UKAS calibration certificates with traceability to recognised standards.

Standard Traceable Calibration (ISO 9001):

• Traceable to national standards
• Suitable for internal quality control
• Meets most general industrial requirements
• More cost-effective option
• Certificate shows calibration results
• Adequate for non-regulated industries

UKAS Calibration (ISO/IEC 17025):

• Highest level of independent accreditation
• Required for regulated industries (pharmaceutical, healthcare, some food applications)
• Provides global recognition and acceptance
• Includes detailed measurement uncertainty analysis
• Stricter documentation and traceability requirements
• May be required by customers, auditors, or regulatory bodies
• Essential for legal metrology and trade-approved equipment
• Provides an uncertainty of measurement budget

Which do you need?

If you’re unsure, our service team can advise based on your industry, application, and any regulatory requirements you must meet. Many clients use UKAS calibration for critical scales and standard calibration for general process equipment to balance cost with compliance.

Routine Schedule:

• At least annually for most industrial applications
• Every 6 months for trade-approved scales used for selling goods by weight
• Quarterly or monthly for pharmaceutical and laboratory balances with critical accuracy requirements

Immediate Calibration Needed When:

• Scales are newly installed or relocated
• After any repair or maintenance work
• Following a significant impact or damage
• If you notice weighing inconsistencies or errors
• When audits or inspections identify concerns
• Before critical production runs

Industry-Specific Requirements:

• Food manufacturing: Often requires calibration aligned with HACCP procedures
• Pharmaceutical: May require daily verification checks plus periodic formal calibration
• Trade use: Legal metrology regulations mandate regular inspection

MWS offers flexible calibration service contracts to ensure your equipment remains compliant and accurate. Our nationwide service team can work around your production schedules to minimise downtime.