Remote data acquisition system and method

1. An apparatus comprising:

a first sensor for sensing a first cooling system operating parameter;

a second sensor for sensing a second cooling system operating parameter;

a third sensor for sensing a motor operating parameter; and

a computer including data sets of normal operating parameters for a plurality of cooling systems stored in a memory and receiving system configuration information data for an individual cooling system, said computer selecting one of said data sets of normal operating parameters based on said received system configuration information data and comparing said first cooling system operating parameter, second cooling system operating parameter, and motor operating parameters with said selected normal operating parameters to diagnose a cooling system.

2. The apparatus of claim 1 , wherein said first cooling system parameter is a low side pressure measurement, said second cooling system parameter is a high side pressure measurement, and said motor operating parameter is a supply voltage to a compressor.

3. The apparatus of claim 1 , wherein said first cooling system parameter is a low side pressure measurement and said second cooling system parameter is a high side pressure measurement.

4. The apparatus of claim 1 , further comprising:

a master computer disposed remote from said computer; and

a wireless connection between said computer and said master computer.

5. The apparatus of claim 4 , wherein said wireless connection includes a connection to the Internet.

6. The apparatus of claim 1 , wherein said computer provides instructions for repairing a cooling system.

7. The apparatus of claim 1 , further comprising a barcode reader in communication with said computer.

8. A data acquisition system for monitoring a cooling system, said data acquisition system comprising:

a computer having a memory containing a plurality of data sets of normal operating parameters for a plurality of cooling systems and an input for receiving system configuration information and an input for receiving monitored operating parameters;

a first sensor adapted to sense a first cooling system operating parameter;

a second sensor adapted to sense a second cooling system operating parameter; and

a third sensor adapted to sense a motor operating parameter;

wherein said monitored operating parameters include said first cooling system operating parameter, said second cooling system operating parameter, and said motor operating parameter, said computer being operable to diagnose a cooling system based on a comparison of said monitored operating parameters to one data set of said normal operating parameters.

9. The data acquisition system in accordance with claim 8 , wherein said monitored operating parameter includes said motor operating parameter and at least one of said first cooling system operating parameter and said second cooling system operating parameter.

10. The data acquisition system in accordance with claim 9 , wherein said first cooling system operating parameter is a low side pressure measurement, said second cooling system operating parameter is a high side pressure measurement, and said motor operating parameter is a supply voltage to a compressor.

11. The data acquisition system in accordance with claim 9 , wherein said first cooling system operating parameter is a low side pressure measurement and said second cooling system operating parameter is a high side pressure measurement.

12. The data acquisition system in accordance with claim 8 , wherein said monitored operating parameter includes said first cooling system operating parameter, said second cooling system operating parameter, and said motor operating parameter.

13. The data acquisition system in accordance with claim 8 , further comprising:

a master computer disposed remote from said computer; and

a wireless connection between said computer and said master computer.

14. The data acquisition system in accordance with claim 13 , wherein said wireless connection includes a connection to the Internet.

15. The data acquisition system in accordance with claim 13 , wherein said computer provides instructions for repairing a cooling system.

16. The data acquisition system in accordance with claim 8 , wherein said computer is a hand-held computer.

17. A method comprising:

measuring a first cooling system operating parameter;

measuring a second cooling system operating parameter;

measuring a motor operating parameter;

selecting a set of cooling system configuration information from a database including a plurality of sets of cooling system configuration information;

communicating said selected set of cooling system configuration information to a computer;

selecting a data set of normal operating parameters based on said selected set of cooling system configuration information;

comparing said selected data set of normal operating parameters with said first cooling system operating parameter, said second cooling system operating parameter, and said motor operating parameter; and

outputting a diagnostic result in response to said comparing.

18. The method for monitoring a system in accordance with claim 17 , wherein said selecting includes manually inputting an identifier of a monitored system.

19. The method for monitoring a system in accordance with claim 17 , wherein said selecting includes inputting an identifier of a monitored system with a barcode reader.

20. The method for monitoring a system in accordance with claim 17 , wherein said selecting includes communicating between said computer and a master computer using a wireless connection.

21. The method for monitoring a system in accordance with claim 20 , wherein said communicating between said computer and said master computer using a wireless connection includes communicating through the Internet.

22. The method for monitoring a system in accordance with claim 17 , wherein said providing diagnostic results includes providing instructions for repairing a monitored system.

23. The method for monitoring a system in accordance with claim 17 , further comprising performing a test session prior to comparing said set of predefined operating parameters with said provided operating parameters of a monitored system.

24. The method for monitoring a system in accordance with claim 17 , further comprising updating said data base from a master computer through a wireless connection.