Uninterruptible Power Supply (UPS) 250 Caterpillar

Perform this procedure after conducting one of the following procedures: Testing and Adjusting, "AC Interface Board - Remove and Install" and Testing and Adjusting, " System Controller Board - Remove and Install".

Note: If the procedure Testing and Adjusting, "System Controller Board - Remove and Install" is conducted, the following calibration procedures are required: Testing and Adjusting, "Flywheel Telemetry - Calibrate"Testing and Adjusting, "AC Current - Calibrate", Testing and Adjusting, "AC Voltage - Calibrate" and Testing and Adjusting, "DC Bus Voltage - Calibrate".

Table 1

Required Tools
Part Number	Description
155-5175	AC Current Probe
146-4080	Digital Multimeter
OR
9U-7330	Digital Multimeter

1. Place the keyswitch in the BYPASS position.

2. Secure the system. Verify that all the high voltage inputs to the system are open. Ensure that the flywheel is at zero rpm.

3. Remove the lower sheet metal panel and the panel for the System I/O Interface Board. The panel for the System I/O Interface Board is located in the lower left side of the cabinet.

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Illustration 1	g00700951
(1) Serial Terminal "J1"

4. Connect a PC to the RS-232/RS-485 port ("J1"). The port is located on the bottom back corner of the system's I/O board. This must be accomplished prior to the application of high voltage to the system.

5. Close the high voltage inputs to the system.

   The system will start. The system will remain in "Bypass". The PC should be communicating with the system.

6. Click on "Enter Password" menu option in order to view the "Enter User Name / Password" dialog box.

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Illustration 2	g00697157
The "Enter User Name / Password" dialog box

7. Enter a valid "User Name" and then enter a valid "Password".

   After the password has been entered, the menu options will change. The menu bar will contain a "Calibrate" option.

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Illustration 3	g00737245
The "Calibrate" drop-down menu

8. Click on the "Calibrate" drop-down menu. Select the "AC Currents" option.

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Illustration 4	g00737241
The "Calibration of a channel" window

9. A "Calibration of a channel" window will appear.

10. Click on the "View Status" button in the "Calibration of a channel" window.

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Illustration 5	g00737259
"Calibration Group Status" window

11. A "Calibration Group Status" window will open. Click on the "USE DEFAULTS" button on the "Calibration of a channel" window.

12. You are prompted to enter the MINIMUM value for "Current In Ph. A".

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Illustration 6	g00698435
(1) Ground Terminal (2) Output Terminals (3) Neutral Terminal (4) AC Input Terminals

13. Clamp the probe of the meter around the INPUT conductor for "Phase A". Record the meter reading.

14. Enter the value from Step 13 in the "Enter the value" field of the "Calibration of a channel" window.

15. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the field for the MINIMUM value of "Current In Ph. B".

    The "Calibration Group Status" window will display "Minimum value entered for ph. A Current In.".

16. Clamp the probe of the meter around the INPUT conductor for "Phase B". Record the meter reading.

17. Enter the value from Step 16 in the "Enter the value" field of the "Calibration of a Channel" window.

18. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the field for the MINIMUM value of "Current In Ph. C".

    The "Calibration Group Status" window will display "Minimum value entered for ph. B Current In.".

19. Clamp the probe of the meter around the INPUT conductor for "Phase C". Record the meter reading.

20. Enter the value from Step 19 in the "Enter the value" field of the "Calibration of a channel" window.

21. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the MINIMUM value for the "Current Out Ph. A" field.

    The "Calibration Group Status" window will display "Minimum value entered for ph. C Current In.".

22. You are prompted to enter the MINIMUM value for "Current Out Ph. A".

23. Enter the MINIMUM value for "Current Out Ph. A". Enter "0.0".

24. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the MINIMUM value for the "Current Out Ph. B" field.

    The "Calibration Group Status" window will display "Minimum value entered for current out Ph. A".

25. You are prompted to enter the MINIMUM value for "Current Out Ph. B".

26. Enter the MINIMUM value for "Current Out Ph. B". Enter "0.0".

27. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the MINIMUM value for the "Current Out Ph. C" field.

    The "Calibration Group Status" window will display "Minimum value entered for current out Ph. B".

28. You are prompted to enter the MINIMUM value for "Current Out Ph. C".

29. Enter the MINIMUM value for "Current Out Ph. C". Enter "0.0".

30. Click on the "OK" button. When you depress the "OK" button, the "Calibration Group Status" window will display "Minimum value entered for current out Ph. C".

31. Click on the "MAXIMUM" button.

32. Add the approximate full load to the system, while the system remains in the "Bypass" mode.

33. You are prompted to enter the MAXIMUM value for "Current In Ph. A".

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Illustration 7	g00698435
(1) Ground Terminal (2) Output Terminals (3) Neutral Terminal (4) AC Input Terminals

34. Clamp the probe of the meter around the INPUT conductor for "Phase A". Record the meter reading.

35. Enter the value from Step 45 in the "Enter the value" field of the "Calibration of a Channel" window.

36. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the MAXIMUM value for the "Current In Ph. B" field.

    The "Calibration Group Status" window will display "Calibration complete but not saved for current in Ph. A".

37. You are prompted to enter the MAXIMUM value for "Current In Ph. B".

38. Clamp the probe of the meter around the INPUT conductor for "Phase B". Record the meter reading.

39. Enter the value from Step 49 in the "Enter the value" field of the "Calibration of a Channel" window.

40. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the MAXIMUM value of the "Current In Ph. C" field.

    The "Calibration Group Status" window will display "Calibration complete but not saved for current in Ph. B".

41. Clamp the probe of the meter around the INPUT conductor for "Phase C". Record the meter reading.

42. Enter the value from Step 52 in the "Enter the value" field of the "Calibration of a Channel" window.

43. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the MAXIMUM value for the "Current Out in Ph. A" field.

    The "Calibration Group Status" window will display "Calibration complete but not saved for current in Ph. C".

44. You are prompted to enter the MAXIMUM value for "Current Out Ph. A".

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Illustration 8	g00698435
(1) Ground Terminal (2) Output Terminals (3) Neutral Terminal (4) AC Input Terminals

45. Clamp the probe of the meter around the OUTPUT conductor for "Phase A". Record the meter reading.

46. Enter the value from Step 45 in the "Enter the value" field of the "Calibration of a Channel" window.

47. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the MAXIMUM value for the "Current Out Ph. B" field.

    The "Calibration Group Status" window will display "Calibration complete but not saved for current out Ph. A".

48. You are prompted to enter the MAXIMUM value for "Current Out Ph. B".

49. Clamp the probe of the meter around the OUTPUT conductor for "Phase B". Record the meter reading.

50. Enter the value from Step 49 in the "Enter the value" field of the "Calibration of a Channel" window.

51. Click on the "OK" button. When you depress the "OK" button, the window will automatically change to the MAXIMUM value of the "Current Out Ph. C" field.

    The "Calibration Group Status" window will display "Calibration complete but not saved for current out Ph. B".

52. Clamp the probe of the meter around the OUTPUT conductor for "Phase C". Record the meter reading.

53. Enter the value from Step 52 in the "Enter the value" field of the "Calibration of a Channel" window.

54. Click on the "OK" button. When you depress the "OK" button, the "Calibration Group Status" window will display "Calibration Complete But Not Saved".

55. Click on the "Save" button.

56. Remove the load from the system.

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Illustration 9	g00737371

57. When the message from illustration 9 is displayed, the procedure is complete.