Adjustment; Adjustment With Air And Water At 20 °C - Anton Paar DMA 4100 Manual De Instrucciones

E N
7 Checking Procedure, Adjustment and Calibration
20
7.3

Adjustment

• An adjustment has to be performed if deviations between the displayed
values and reference values of density standards exceed the specifications
of the DMA or the specifications of the standard.
• Air and bi-distilled, freshly degassed water are used for normal adjustment.
• A factory setting allows density measurements over the entire temperature
range, although adjustment is usually only performed at 20 °C.
• 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 is
necessary (see Chapter 7.3.2).
Hint:
It is not recommended and does not improve the performance of the DMA to
adjust if calibrations with suitable density standards indicate no deviations
from the reference values.
7.3.1 Adjustment with Air and Water at 20 °C
Normal adjustment (5-10 min) is performed using dry air (see Appendix A) and bi-
distilled, freshly degassed water at 20 °C.
Adjustment procedure at 20 °C:
1. Before adjustment thoroughly clean and dry the measuring cell (see Chapter
9).
2. Press the "Menu" key and select the menus "adjustment", "adjust" and
"density (air, water)" using the "UP", "DOWN" and "↵" keys.
Hint:
If the DMA is set to any other temperature, it will automatically be switched to
20 °C when the adjustment procedure is started.
3. Start the adjustment by pressing the "OK" key.
4. Press the "↵" key and enter the current air pressure using the "UP",
"DOWN", "Left", "Right" and "↵" keys.
XDLIB28