Fluke 45 Service Manual

45
Service Manual
iv
5-15. Display Assembly Troubleshooting...................................................... 5-17
5-16. Calibration Failures .............................................................................. 5-19
5-17. Introduction...................................................................................... 5-19
5-18. Calibration-Related Components ..................................................... 5-20
5-19. Calibration Interrelationships........................................................... 5-21
5-20. Retrieving Calibration Constants ..................................................... 5-21
5-21. Replacing the EEROM A1U5.......................................................... 5-21
6 List of Replaceable Parts................................................................... 6-1
6-1. Introduction........................................................................................... 6-3
6-2. How to Obtain Parts.............................................................................. 6-3
6-3. How to Contact Fluke........................................................................... 6-4
6-4. Manual Status Information ................................................................... 6-4
6-5. Newer Instruments................................................................................ 6-4
6-6. Parts ...................................................................................................... 6-4
7 Option -01 Battery Pack..................................................................... 7-1
7-1. Introduction........................................................................................... 7-3
7-2. Specifications........................................................................................ 7-3
7-3. Theory of Operation ............................................................................. 7-3
7-4. Functional Block Description........................................................... 7-3
7-5. Switching Power Supply.............................................................. 7-5
7-6. Cycle/Float Charge Rate Switch.................................................. 7-5
7-7. Low Battery Indicator Detector ................................................... 7-5
7-8. Low Battery Disconnect............................................................... 7-5
7-9. Constant Voltage Trickle Charger ............................................... 7-6
7-10. Other Circuits............................................................................... 7-6
7-11. General Maintenance............................................................................ 7-6
7-12. Removal............................................................................................ 7-6
7-13. Installation........................................................................................ 7-7
7-14. Performance Testing............................................................................. 7-9
7-15. General Operability.......................................................................... 7-9
7-16. Low Battery Indicator Detector and Low Battery Disconnect Test. 7-10
7-17. Cycle/Float Charge Rate Switch Test .............................................. 7-10
7-18. Calibration ............................................................................................ 7-12
7-19. Troubleshooting.................................................................................... 7-13
7-20. Additional Tests.................................................................................... 7-14
7-21. Schematic Diagram............................................................................... 7-14
7-22. List of Replaceable Parts...................................................................... 7-14
8 Option -05 IEEE-488 Interface............................................................ 8-1
8-1. Introduction........................................................................................... 8-3
8-2. Theory of Operation ............................................................................. 8-3
8-3. Functional Block Description........................................................... 8-3
8-4. Detailed Circuit Description............................................................. 8-3
8-5. Main Assembly Connectors......................................................... 8-3
8-6. Address Decoding Circuit............................................................ 8-3
8-7. Isolation Circuits.......................................................................... 8-4
8-8. IEEE-488 Controller .................................................................... 8-4
8-9. IEEE-488 Transceivers/Connector............................................... 8-5
8-10. General Maintenance............................................................................ 8-8
8-11. Removing the IEEE-488 Interface Option ....................................... 8-8
8-12. Installing the IEEE-488 Interface Option......................................... 8-9

Fluke 45 Specifications

General

Diode Test	Yes
Display Digits	5 digits
Interface	RS-232
Frequency Range	5Hz to 500kHz
Continuity	< 25 Ω
Basic DC Accuracy	0.05%
Power Supply	115/230 V AC, 50/60 Hz