Fluke Biomedical 07-424 - Manual (Page 11)

Maintenance & Calibration
Lamp Replacement
3
3-3
3.4 Lamp Replacement
Disconnect the unit from the power supply before
removing cover or changing fuses.
3.4.1 Table Lamps
The four (4) #37 lamps which provide table illumination have a life expectancy of approximately 1500
hours. #74 lamps can be used in their place to provide greater brilliancy, but average life is only about
500 hours. Use the following procedure to replace the lamps:
1. Remove the two (2) screws holding the plastic table to the case.
2. Carefully lift out the table using the finger slots provided on either side.
3. The lamps will be clearly visible and, being of the wedge base type, can be removed by pulling up
on them.
4. Insert the four (4) #37 replacement lamps provided in the spare parts kit supplied at the time of
shipment.
When inserting new lamps, make sure that the wire
contacts are in proper position, otherwise good
contact will not be made.
Table 3-1. Step Tablet Accuracy
Tablet Density Total Tablet Error
Total Error Assuming
Instrument Error ± 0.01
0.10 0.01 0.02
0.30 0.01 0.02
0.50 0.02 0.03
1.00 0.03 0.04
1.50 0.05 0.06
2.00 0.06 0.07
2.50 0.08 0.09
3.00 0.09 0.10
3.50 0.11 0.12
WARNING
NOTE