Sartorius CCL1007 Mass Comparator

Overview

The Sartorius CCL1007 Mass Comparator is a metrological-grade instrument engineered for high-precision mass comparison of standard weights up to 1 kg. Designed in collaboration with the International Bureau of Weights and Measures (BIPM) and the Institute of Process Measurement and Sensor Technology at Technische Universität Ilmenau, the CCL1007 implements a dual-mode electro-magnetic force compensation principle—operating with equal fidelity in ambient air and controlled vacuum environments. Its core function is to determine minute mass differences between reference and test weights with a resolution of 0.1 µg, enabling calibration laboratories, national metrology institutes (NMIs), and accredited testing facilities to perform direct mass comparisons traceable to the SI kilogram definition. Unlike conventional analytical balances, the CCL1007 eliminates buoyancy-related uncertainty by allowing vacuum operation (typically ≤ 10⁻² mbar), thereby removing air density corrections and significantly improving measurement reproducibility for Class E1 and E2 weight certification.

Key Features

• 0.1 µg resolution with <1 µg repeatability under vacuum (10⁻² mbar) and <2 µg in ambient air mode
• Dual-environment capability: seamless switching between vacuum chamber and atmospheric operation without hardware reconfiguration
• Integrated electromagnetic force restoration transducer with temperature-stabilized coil and feedback-controlled suspension system
• Automated tare and zero-tracking routines compliant with OIML R 111 and ISO/IEC 17025 requirements for weight calibration laboratories
• Passive vibration isolation platform with active damping interface compatible with standard metrology lab floors (ISO 5347 Class 2)
• Hermetically sealed vacuum chamber with integrated pressure sensor, leak-rate monitoring (<1×10⁻⁷ mbar·L/s), and bake-out support

Sample Compatibility & Compliance

The CCL1007 accommodates cylindrical, hexagonal, and parallelepiped standard weights conforming to OIML R 111–1 (E1, E2, F1, F2) and ASTM E617 specifications. Weight handling is optimized for 1 g to 1 kg masses with diameters up to 100 mm and heights ≤ 150 mm. The comparator’s mechanical design ensures minimal thermal drift (<0.3 µg/°C) across its operational range (18–23 °C). All measurements are fully traceable to primary standards maintained by PTB (Physikalisch-Technische Bundesanstalt) and NIST, satisfying mandatory audit requirements under ISO/IEC 17025:2017 Clause 6.5.2 and EU Regulation (EU) No 1024/2012 on metrological traceability. It supports GLP-compliant documentation workflows required for NMIs undergoing BIPM key comparison participation.

Software & Data Management

The CCL1007 operates with Sartorius METRIS software—a dedicated metrology application certified for compliance with FDA 21 CFR Part 11 (electronic records/signatures), EU Annex 11, and ISO 17025 data integrity clauses. METRIS provides automated sequence execution for multi-weight comparisons (e.g., ABBA, ABA, or 7-step substitution methods), real-time uncertainty budgeting per GUM (JCGM 100:2008), and export of raw data in .csv and .xml formats compatible with MUSE (Metrology Unified Software Environment) and GUM Workbench. Audit trails record operator ID, timestamp, environmental parameters (T, P, RH), vacuum status, and all manual interventions—retained for ≥ 10 years as required under GLP and GMP quality systems.

Applications

• Primary and secondary calibration of stainless-steel and platinum-iridium reference weights in NMIs and accredited calibration labs
• Inter-laboratory comparisons coordinated by BIPM, EURAMET, or APMP for CIPM MRA signatory validation
• Verification of mass stability in weight storage environments (e.g., cleanrooms with controlled T/RH)
• Research into surface adsorption effects on mass artifacts using controlled vacuum exposure protocols
• Support for redefinition-based metrology activities aligned with the 2019 SI revision, particularly Kibble balance cross-validation

FAQ

What vacuum level is required for optimal performance?
The CCL1007 achieves its specified 0.1 µg resolution at pressures ≤ 10⁻² mbar; typical operating range is 1×10⁻³ to 5×10⁻² mbar.
Can the CCL1007 be used for routine industrial QC weighing?
No—it is not designed for production-floor use; it is strictly intended for metrological comparison and calibration of reference standards.
Is external temperature control mandatory?
Yes. Stable ambient temperature (±0.5 °C over 24 h) and low air turbulence are prerequisites per ISO/IEC 17025 and OIML R 111.
Does the system include factory calibration certificates?
Yes—each unit ships with a PTB-traceable calibration certificate covering sensitivity, linearity, eccentric load, and vacuum performance verification.
How is mechanical shock resistance ensured during transport?
The instrument includes internal locking mechanisms for suspension and vacuum chamber components, validated per IEC 60068-2-27 (shock) and IEC 60068-2-64 (vibration).