TSI Instruments SIZER 3321 - Page 64

B-2 Model 3321 Aerodynamic Particle Sizer

Spectrometer
Symptoms
Recommendations
The LASER LED does not come on
when the instrument is powered up
Check to see that the laser is turned on from the front panel menu.
Rotate the control knob all the way clockwise until the menu button is shown. Press
the control knob in so that the menu appears.
Rotate the knob to scroll the cursor down the menu until the laser power item is
highlighted.
Make sure that the setting is 50% or higher (factory setting is 75%). Note:
changing the power setting from the instrument calibration setting will change the
calibration.
Rotate the knob to scroll the cursor down the menu until the laser item is
highlighted.
Press the control knob to toggle the laser on if necessary.
Exit the menu.
If the laser is off when you exit the menu, the APS™ spectrometer will not turn it on
at power-up. If it is on when you exit the menu, it will turn on when the APS™
spectrometer is powered up.
No power
Check for good contact between the power cord and the wall outlet. Check for
power at the outlet.
Serial Communications not working
See Table C-4, “Troubleshooting Serial Commands.”