Fluke Biomedical 07-440 - Manual (Page 14)

Nuclear Associates 07-440
Operators Manual
3-4
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
3.4.2 Measurement Light Source
Disconnect the unit from the power supply before
removing cover or changing fuses.
The LED used for photometric measurements is P/No. 65-158. This LED should have an extremely long
life. If the LED requires replacement, use the following procedure:
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. Pull off the tabs attached to the wires of the measurement from the printed circuit board.
It is best to use pliers on the tabs while pushing
down on the printed circuit board.
4. Loosen the screw holding the LED Socket Assembly in the LED/aperture holder and remove the
LED Socket Assembly (see Figure 3-1).
WARNING
NOTE