Weighing; And Linearization - Sartorius Cubis MCA Series Operating Instructions Manual

8.8

Weighing

NOTICE
Chemicals may damage the device or accessories!
Chemicals can attack the device or the connected accessories internally and
externally . This may damage the device and accessories .
Use appropriate containers when weighing chemicals .
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Procedure
Start a task with weighing function .
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Zero the device . In order to do so, press the [Zero] button .
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If below-balance weighing is being carried out: Suspend the sample on the hook
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for below-balance weighing, e .g . with a wire .
If a container is being used for the sample:
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Place the container on the weighing pan .
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Tare the device . In order to do so, press the [Tare] button .
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Place the sample in the container or fill the container .
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If no container is used for the sample and no below-balance weighing is being
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carried out: Place the sample on the weighing pan .
Once the weight value is displayed in black and the weighing unit is displayed:
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Read off the measured value .
8.9 Overview of Calibration, Adjustment, and Linearization
During calibration, a calibration weight is used to determine how much the displayed
value deviates from the actual value . This deviation is compared with a preset target
value . The subsequent adjustment eliminates this deviation . During linearization, the
deviation of the values from the ideal characteristic curve is corrected .
Calibration and adjustment must be performed regularly:
− Daily, every time the device is switched on
− After every leveling
− After changing the ambient conditions (temperature, humidity, or air pressure)
− After setting the device up at a new installation site
Calibration and adjustment may be performed in different ways:
− Adjusting with the isoCAL Function
− Internal or external calibration or adjustment
Only internal adjustment / calibration is possible for all conformity-assessed devices
in legal metrology .
Operation
Cubis ® MCA Operating Instructions 67