Fluke 27 Service Manual

3-1
Chapter 3
Maintenance
Title Page
3-1. Introduction........................................................................................... 3-3
3-2. Service Information .............................................................................. 3-4
3-3. Operator Maintenance .......................................................................... 3-4
3-4. Battery Replacement ........................................................................ 3-5
3-5. Fuse Test........................................................................................... 3-6
3-6. Fuse Replacement............................................................................. 3-6
3-7. General Maintenance Information........................................................ 3-7
3-8. Handling Precautions for Static-Sensitive Devices.......................... 3-7
3-9. Disassembly...................................................................................... 3-7
3-10. Reassembly....................................................................................... 3-10
3-11. Cleaning............................................................................................ 3-12
3-12. Performance Tests ................................................................................ 3-12
3-13. Display Test...................................................................................... 3-12
3-14. Voltage Functions Performance Verification................................... 3-13
3-15. AC and DC Current Performance Verification................................ 3-13
3-16. Ohms Function Performance Verification ....................................... 3-14
3-17. Diode Test Performance Verification .............................................. 3-15
3-18. Calibration Adjustment......................................................................... 3-15
3-19. Calibration Preparation .................................................................... 3-15
3-20. DC Voltage Connection ................................................................... 3-16
3-21. AC Voltage Calibration.................................................................... 3-16
3-22. Troubleshooting.................................................................................... 3-17
3-23. Power-Up Self Test .......................................................................... 3-17
3-24. Overall System Check...................................................................... 3-17
3-25. DC Voltage Signal Tracing.............................................................. 3-18
3-26. Fault Diagnosis Guide...................................................................... 3-19

Fluke 27 Specifications

General

Display Type	LCD
AC Voltage Range	0.1 mV to 1000 V
DC Voltage Range	0.1 mV to 1000 V
AC Current Range	0.1 μA to 10 A
DC Current Range	0.1 μA to 10 A
Battery Type	9V
Continuity	Yes
Diode Test	Yes
Safety Rating	CAT III 600V
AC Current Accuracy	±(1.5% + 2 digits)
Resistance Accuracy	±(0.2% + 1 digit)
DC Voltage Accuracy	±(0.1% + 1 digit)