Adjustment With Air And Water For The Entire Temperature Range (Full Range Adjustment); Special Adjustment; Calibration - Anton Paar DMA 4100 Manual De Instrucciones

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7 Checking Procedure, Adjustment and Calibration
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7.3.2 Adjustment with Air and Water for the Entire
Temperature Range (Full Range Adjustment)
If measurements at different temperatures indicate deviations between the
displayed values on the DMA and reference values of density standards, then an
air and water adjustment for the whole temperature range (2 hours) is necessary.
Dry air (Appendix A) and bi-distilled, freshly degassed water are used.
The adjustment procedure is performed as follows:
- Air adjustment at 40 °C
- Air adjustment at 60 °C
- Water adjustment at 40 °C
- Water adjustment at 60 °C
Full range adjustment procedure:
1. Perform an air and water adjustment at 20 °C (see Chapter 7.3.1).
2. Thoroughly clean and dry the measuring cell (see Chapter 9).
3. Press the "Menu" key and select the menus "adjustment", "adjust" and
"density (temperature range)" using the "UP", "DOWN" and "↵" keys.
4. Start the full range adjustment by pressing the "OK" key.
5. Perform all further steps as is required by the instrument.
Hint:
Bi-distilled water is degassed by boiling it, cooled to 65 to 60 °C and filled
bubble-free into the measuring cell using a syringe.
6. For saving the adjustment proceed as described in Chapter 7.3.1.
7.3.3

Special Adjustment

Special adjustment (user-specific adjustments) should only be performed if e.g. a
norm explicitly demands an adjustment different from the above-mentioned
adjustment. During special adjustments no correction of the viscosity will be
performed (see reference manual chapter 8.3.3).
7.4

Calibration

• Calibrations are carried out using certified liquid density standards.
• The displayed density value on the DMA is compared to the reference value
indicated in the calibration certificate of the liquid density standard.
• The physical properties (density, viscosity) of the liquid density standards
should be similar to those of the samples.
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