Vacuum Comparators and Mass Metrology at National Metrology Institutes
METTLER TOLEDO's M_one and M_10 set new standards for mass comparison with the lowest achievable measurement uncertainty. The possibility to determine measurements at vacuum down to 10–6 mbar ensures that any environment influence is encountered for.
Designed for artefacts of different shape such as Si-spheres, Pt-Ir standards or other cylindrical or knob weights, the M_one is supporting today's and future needs of Metrology Institutes, therefore the M_one is a key component ensuring national traceability of mass and commonly utilized in the redefinition of the kilogram.
The modular design supports a customized system configuration with the possibility to upgrade at later stage.
Reference of Mass Determination
METTLER TOLEDO’s M_one mass comparator sets a new benchmark in the field of ultra-high precision weighing. Masses can be determined with an accuracy of 100 nanograms, a proven typical repeatability of 300 nanograms and a result data comparison of 10 nanograms.
The unique Artefact Storage & Transport Vessel (ASTV) ensures objects are always kept in the stable conditions of a vacuum or inert gas and prevents contamination from the surroundings.
The user places weights directly on the vacuum comparators turntable through the large quick-loading door. Besides visually monitoring your loading process, the ergonomic design allows direct access to the weight handler without lifting the entire pressure enclosure.
Automated Gravimetric Centering (AGC) of Weights
The AGC positions all types of artefacts exactly in their gravimetric center before measuring. This reduces eccentricity error to a minimum and ensures the highest possible repeatability of measurements.
M_Control Software and Optional Efficiency Pack
Completely control your mass calibration processes with vacuum comparators M_Control software.
Use the optional Efficiency Pack for increased measurement accuracy by post-processing of air buoyancy.
Products and Specs
|M_one Comparator||M_10 Comparator|
|Article No.||On Request||On Request|
|OIML Calibration Range E0||100 g - 1 kg*||1 kg - 10 kg|
|OIML Calibration Range E1||100 g - 1 kg*||1 kg - 10 kg|
|OIML Calibration Range E2||100 g - 1 kg*||1 kg - 10 kg|
|OIML Calibration Range F1||100 g - 1 kg*||1 kg - 10 kg|
|OIML Calibration Range F2||100 g - 1 kg*||1 kg - 10 kg|
|Maximum load||1001.5 g||10011 g|
|Readability||0.1 μg||1.0 μg|
|Repeatability at nominal load|
(5x ABA, measured at)
|0.5 μg||8.0 μg|
|Repeatability typical ABA||0.3 μg||4.0 μg|
|Electrical weighing range||1.5 g||11 g|
|Linearity (electrical weighing range)||2 μg||±8 μg|
|Eccentric load deviation (at test load)||0.0 ng (1 g)||0.0 ng (10 g)|
|Settling time||30 s||30 s|
|Adjustment with external weight||1 g||10 g|
|*Enhance calibration range down to 1 mg by utilizing support weights|
|Weight handler||Turntable, 4 or 6 positions||Turntable, 4 positions|
|Software and controller||Windows®, standard||Windows®, standard|
|Vacuum chamber||Round bell jar||Round bell jar|
|Self centering pan||Integrated||Integrated|
|Weighing pan||Hanging pan||Hanging pan|
|Admissible Ambient Conditions|
|Temperature (°C)||17 - 27||17 - 27|
|Max. temperature change (°C /12h)||0.1||0.1|
|Relative humidity (%)||45 - 60||45 - 60|
|Comparator (WxDxH, mm)||4-Pl.: 274 x 409 x 620|
6-Pl.: 344 x 440 x 620
|315 x 720 x 850|
|Display unit (WxDxH, mm)||226 x 370 x 155||226 x 370 x 155|
|Comparator weight (kg)||300||350|
|Object diameter (D, mm)||Cylindrical: 22 - 90|
Spherical: 40 - 100
|Cylindrical: 18 - 105|
Spherical: 18 - 110
|Object height (H, mm)||100||195|
|Control unit for weight handler (WxDxH, mm)||202 x 197 x 92||202 x 197 x 92|
|Vacuum chamber (WxDxH, mm)||684 x 884 x 930||684 x 884 x 930|
|Rack for control & display unit||Optional||Optional|