A&D ML-50 - C. Other Questions

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■Basics/B. Calibration/C. Others
B. Calibration
C. Other Questions
N
o. Question Answer
1
Is sodium tartrate dihydrate
used for moisture content
calibration of the
MS/MX/MF/ML?
No, it is not used for calibration. However, it can be used to
check performance (accuracy) since moisture content rate o
f
the sample is theoretically known.
Since analyzers determine moisture content by weighing
samples before and after heating, they are calibrated using a
counterweight. Temperature can also be calibrated.
2
Can users calibrate the weight
and temperature?
Yes. (Temperature calibration is possible with the MS-70 and
MX-50 only). The calibration results can be printed out in
accordance with GLP, GMP or ISO.
1. For weight calibration, use the optional AX-MX-41, a
calibration mass of 20 g.
2. For temperature calibration, use the optional AX-MX-43, a
certified temperature calibrator (for the MS-70 and MX-50
only.)
3
A
re traceability system
diagrams and certificates of
measurement available?
Yes, both are available upon request.
1. Documentation for analyzers covers both weight and
temperature.
2. Documentation for temperature calibrators (AX-MX-43)
covers temperature only. Traceability and measurement
certificates are included with calibrators at shipping free o
f
charge.
N
o. Question Answer
1
Should I be concerned about
the moisture in a glass fiber
sheet when it is used?
Not usually. However, if you want to be very strict, dry the sheet
in the analyzer and store it in a desiccator prior to use.
2
Is the absolute measurement
of the moisture content rate
possible? (Can only water
content be measured?)
No. While minerals such as metal, glass or sand have only
water as moisture content, most samples, including organic
matter, have materials other than water that can vaporize unde
r
certain temperature conditions. Also, samples that thermally
decompose easily may show different measurement results
depending on the heating temperature.