Preparing Weighings; Weighing; Overview Of Calibration, Adjustment, And Linearization - Sartorius Cubis MCE series Operating Instructions Manual

Operation
50 Cubis ® MCE Operating Instructions
8.4

Preparing Weighings

The device must be prepared before every weighing .
Requirements
The device is ready for use
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
Level the device .
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Zero the device for calibration . To do so, press the [Zero] key .
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If the device cannot be zeroed: Remove the sample to be weighed and re-zero
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the device .
Calibrate the device .
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8.5

Weighing

Procedure
Zero the device .
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If necessary, place a container for the sample on the device .
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To compensate the weight of the container: Tare the device . To do so, press the
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[Tare] key .
If a container is used for the sample: Place the sample in the container .
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If no container is used for the sample: Place the sample on the weighing pan .
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Once the weight value no longer changes and the weighing unit is displayed:
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Read off the measured value .
8.6

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 against a preset
target value . The subsequent adjustment eliminates this deviation . During lineariza-
tion, 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
− For semi-microbalances and analytical balances: Internal linearization
Only internal calibration / adjustment is possible for all conformity-assessed devices
in legal metrology .