Refrigerated Cooling System

Transcription

1 109 Lukens Drive New Castle, DE Thermal Analysis & Rheology A SUBSIDIARY OF WATERS CORPORATION Refrigerated Cooling System Manual Addendum For use with the following: DSC 10, 910, 912, 2010, 2910 and 2920 single & dual sample cells PN Rev. J (Text Only) Issued November 2000 RCS-1

2 Refrigerated Cooling System 1994, 1995, 1996, 1997, 1998, 1999, 2000 TA Instruments, Inc. 109 Lukens Drive New Castle, DE Notice The material contained in this manual is believed adequate for the intended use of this instrument. If the instrument or procedures are used for purposes other than those specified herein, confirmation of their suitability must be obtained from TA Instruments. Otherwise, TA Instruments does not guarantee any results and assumes no obligation or liability. This publication is not a license to operate under or a recommendation to infringe upon any process patents. RCS-2

3 Addendum: Refrigerated Cooling System RCS-3

4 Refrigerated Cooling System RCS-4

5 Safety CAUTION: CAUTION: NOTE: Due to the size and weight of the cooling accessory, the RCS should always be lifted by two people to prevent injury. The cooling head assembly contains coated fiberfrax material. Excessive handling of this material could cause fiberfrax particles to be emitted into the air. See the MSDS sheet for safety measures to be observed when fiberfrax is used. The RCS contains hazardous materials (i.e., flammable refrigerants). Contact TA Instruments prior to packaging for shipment. Water Condensation Cold Surfaces CAUTION: Some surfaces of the RCS and DSC system may get extremely cold during the use of the RCS for cooling experiments. This presents a danger to exposed skin coming in contact with and adhering to the cold surfaces. Use forceps or gloves when handling the lids, etc. while the RCS is being used. RCS-5

6 Refrigerated Cooling System Temperature Range!WARNING Do not exceed 400 C with the RCS cooling head installed and the RCS power off. Serious damage and/or injury could occur. CAUTION: Do not exceed 400 C with the RCS system installed. If you wish to heat above 400 C, you must first remove the RCS cooling head and gaskets from the RCS-DSC cell, then replace the thermal radiation shield, cell cover, silver lid, and bell jar. Even after these steps have been taken, do not exceed 600 C with the RCS-DSC cell. Follow the directions in this manual for RCS usage. RCS-6

7 Declaration of Conformity RCS-7

8 Refrigerated Cooling System Introducing the RCS Description RCS-8

9 CAUTION: Rapid on/off cycling of the RCS will damage the refrigerant compressors. RCS-9

10 Refrigerated Cooling System Specifications RCS-10

11 RCS-11

12 Refrigerated Cooling System Preparing the DSC RCS-DSC Cell used for DSC 2920 RCS Flange RCS-DSC Cell used for DSC 10, 910, 912, and This is similar to the built-in cell used with the DSC CAUTION: Allow the DSC to cool to ambient temperature before attempting to perform the steps below. RCS-12

13 THERMAL RADIATION SHIELD RETAINING SCREWS METAL SLEEVE RCS-13

14 Refrigerated Cooling System Installing the RCS CAUTION: Do not twist the refrigerant line so that the cooling head is forced down onto the cell. Readjust the position or the orientation of the refrigerant cabinet so that the cooling head slides easily over the cell. RCS-14

15 Installing the RCS RCS-15

16 Refrigerated Cooling System Gaps ~ 1.0 mm (0.040 inch) Anti-frost Sleeve Copper Heat Exchanger DSC Cell RCS-16

17 Installing the RCS DSC 2920 DSC 10, 910, 912, 2910 DSC 2010 Original DSC 10, 910, 912, 2910 thumbscrews (Not used with the RCS) Figure RCS.5 Screws 6. While pressing down on the cooling head assembly, install two (2) screws through the baseplate of the cooling head assembly. DSC 2920 and 2910: Tighten the thumbscrews evenly until they are handtight. DSC 10, 910, 912, 2010: Tighten the screws using a hex key until they are just snug. The baseplate of the cooling head should be tight against the gasket(s) on the DSC cell. If it is not, check to be sure the rubber gaskets are installed correctly over the DSC cell as described in step 1 and repeat steps 3 and 4. See Figures RCS.6, 7 and 8 for correct installation of the RCS Assembly on the DSC 2010, 2910 and RCS-17

18 Refrigerated Cooling System NOTE: To run MDSC TM experiments with the DSC 2910, you must use the mode DSC Modulated. Be careful not to exceed 400 C in this mode. RCS-18

19 RCS-19

20 Refrigerated Cooling System RCS-20

21 Connecting Cables and Lines Gas Cable Connections Event Cable Connections GAS 2 He GAS 1 N 2 Fuse Holder(s): 1 holder for 115V/60Hz 2 holders for 220V/50 Hz Power cable connection RCS-21

22 Refrigerated Cooling System Recommendations: NOTE: If you are only using one gas, it is recommended that it be connected to GAS 1. RCS-22

23 RCS-23

24 Refrigerated Cooling System Red Connectors Black Connectors Gas Cable Event Cable Gas Lines Power Cable Figure RCS.10 Rear Panel of RCS Cabinet with Connections RCS-24

25 Using the RCS-DSC Cell Without the RCS LNCA NOTE: Once you have installed the insulation tape on the RCS-DSC cell to use it with the LNCA, this becomes a permanent change. The cell cannot be reconfigured as a standard RCS-DSC cell. RCS-25

26 Refrigerated Cooling System DSC Cooling Can Above Ambient Only (No Cooling Required) NOTE: The RCS-DSC cell may only be used up to 600 C.!WARNING Do not exceed 400 C with the RCS cooling head installed and the RCS power off. Serious damage and/or injury could occur. RCS-26

27 CAUTION: Do not exceed 400 C with the RCS system installed. If you wish to heat above 400 C, you must first remove the RCS cooling head and gaskets from the RCS-DSC cell, then replace the thermal radiation shield, cell cover, silver lid, and bell jar. Even after these steps have been taken, do not exceed 600 C with the RCS-DSC cell. Follow the directions in this manual for RCS usage. RCS-27

28 Refrigerated Cooling System Using the RCS Start-Up Time Setting the Flow Rates NOTE: When using the RCS with the DSC 2920 Autosampler, the recommended DSC cell purge rates are 25 ml/min for nitrogen and 25 ml/min for helium. RCS-28

29 NOTE: For maximum cooling rates, helium should be used as the GAS 2 purge gas. RCS-29

30 Refrigerated Cooling System Setting Up an RCS Experiment General Guidelines to Prevent Condensation NOTE: Loading samples when the DSC cell is below ambient temperature will almost always cause condensation within the DSC cell, resulting in erroneous heat flow data. RCS-30

31 Experimental Procedure NOTE: When using the RCS with the DSC 2920 Autosampler, air cool can be activated automatically at the end of the run to quicken the cell s return to ambient temperature. It is recommended that you use only laboratory quality dry air for this purpose to minimize moisture and frost condensation around the cell and prevent contamination of the cell by particulates and oil found in the compressed air. RCS-31

32 Refrigerated Cooling System Controlling the RCS Using the Event Feature RCS-32

33 NOTE: The default setting for the Event feature cannot be changed when using the RMX or OS/2 instrument control software. If you want the RCS to remain on at the end of a run, you must set the toggle switch on the front panel of the RCS to MANUAL. CAUTION: We do not recommend that you turn the RCS on and off rapidly after short experiments. Changing the Event Default Setting Event Control with the DSC RCS-33

34 Refrigerated Cooling System Event Control with the DSC Autosampler RCS-34

35 Example RCS Experiments DSC Heating Method RCS-35

36 Refrigerated Cooling System DSC Cooling Method NOTE: * When using the Initial temperature segment at the beginning of an experiment, it is necessary for the operator to select RESUME under Instrument Control in order to go to the next segment in the method. RCS-36

37 Using the RCS DSC Method to Dry the RCS NOTE: To dry the RCS cooling head assembly, first turn off the RCS. MDSC TM Method RCS-37

38 Refrigerated Cooling System NOTE: The maximum temperature that can be achieved, when using helium as the cooling head purge, is approximately 200 C. Use nitrogen from the beginning of the experiment, if it is necessary to exceed 200 C. Troubleshooting Guide RCS-38

39 RCS-39

40 Refrigerated Cooling System RCS-40

41 RCS-41

42 Refrigerated Cooling System RCS-42

43 RCS-43

44 RCS-44 Refrigerated Cooling System Parts List

45 Service and Ordering Information RCS-45

46 Refrigerated Cooling System RCS-46