OsmoPRO® Multi-Sample Micro-Osmometer User’s Guide
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B - Performance characteristics
Definitions
Accuracy
Closeness of agreement between a test result and the accepted reference value (ISO
5725-1)
Repeatability
Precision under conditions where independent test results are obtained with the same
method on identical test items in the same laboratory by the same operator using the
same equipment within short intervals of time (ISO 5725-1:1994)
Source: Harmonized Terminology Database at
Reportable range
0 - 2000 mOsm/kg H
2
O
Resolution
1 mOsm/kg H
2
O
Accuracy (salt solutions)
1
0 – 400 mOsm/kg H
2
O:
Mean value ± 3 mOsm/kg H
2
O from nominal value
400 – 2000 mOsm/kg H
2
O: Mean value ± 0.75% from nominal value
Repeatability (within run)
1
0 – 400 mOsm/kg H
2
O
: Standard deviation ≤ 3 mOsm/kg
H
2
O
400 – 2000 mOsm/kg H
2
O
: Coefficient of Variation ≤ 0.75%
Temperature Effects
2
Less than 1 mOsm/kg H
2
O for every 5 °C (9 °F) ambient temperature change
1
Performance at Reference Conditions: 20 °C to 25 °C (68 °F to 77 °F); 40 to 60 % relative
humidity; tolerances of reference or calibration solutions excluded.
2
Operating Conditions: Temperature 18 °C to 35 °C (64 °F to 95 °F); 30 to 80 % relative
humidity (non-condensing).
