TSI Instruments AeroTrak 9303 Service Manual page 84

4-24
The electronic circuits within this instrument are susceptible to
electro-static discharge (ESD) damage. Use ESD precautions to
avoid damage.
•
Use only a table top with a grounded conducting surface.
•
Wear a grounded, static-discharging wrist strap.
4. Pull the detector board straight out of the optics block.
5. Remove the new detector board from service kit S7000005.
6. Install and fasten in place with the two Phillips head screws.
7. Turn the laser current adjustment potentiometer fully counter-
clockwise.
8. Remove beam block and place a laser power meter in front of the
opening in the optics block.
9. Reconnect all cables to main board and power up the unit.
10. Adjust the potentiometer until the power meter reads 30 mW
±0.5 mW at the beam dump.
11. Turn power off and re-install beam block.
12. Re-assemble unit and calibrate.
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AeroTrak Handheld and Remote Airborne Particle Counters
C A U T I O N