Anton Paar DMA 4100 M, Инструкция по эксплуатации

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Appendix C: Measuring under Special Conditions
C76IB003EN-E 121
C.2 Measuring at Low/High Temperatures
To measure at low temperatures
To perform measurements at temperatures lower than 20 °C (36 °F) below
ambient temperature, install the cooling kit (Mat. No. 80810) and connect the
DMA M to an external thermostat. If your tap water is cool enough also connecting
to a tap water supply will help. Operate the cooling kit with a moderate flow of
water (1 to 3 liters per minute).
Example: Your ambient temperature is 25 °C (77 °F) and you want to perform
measurements at 0 °C (32 °F). Install the cooling kit and connect the DMA M to
an external thermostat or tap water line that is delivering water at a constant
temperature between 5 °C to 15 °C (41 to 59 °F) and change the measuring
temperature to 0 °C (32 °F) in the "Density Module" dialog.
To measure at high temperatures
To prevent bubble formation
If you are measuring samples at temperatures significantly higher than ambient
temperature, the tendency to form gas bubbles in the measuring cell will
dramatically increase. To ensure precise results, you can:
• Degas your samples thoroughly directly before measuring (see Appendix
B.1).
• Heat your samples up to a temperature significantly higher than the
measuring temperature with stirring, directly before measuring.
To measure highly viscous samples at high temperatures
See Appendix B.2.
Temperature range of the
cooling unit 5 to 30 °C (41 to 86 °F)
Maximum pressure 1 bar (14.5 psi). For more details, see the
cooling kit brief instructions.
Connector Self-locking coupling 8 mm, Type Rectus
21KBTS08MVN, Mat. No. 75090
NOTICE
At measuring temperatures of 50 °C (122 °F) and higher, the applied pressure
must be limited to 5 bar (72.5 psi). Otherwise, the injection adapters may leak.