Manual, Ultra High Sensitivity Aerosol Spectrometer (UHSAS)
DOC-0210 Rev E-4
4 7
© 2017 DROPLET MEASUREMENT TECHNOLOGIES
If a purge flow has been installed, the
Purge
monitor displays the purge flow, which should be
20 – 50 sccm. The purge flow provides fresh air for the optics and helps keep them clean.
Laser current
displays the pump laser current in amps. The lower display box is the actual
current, while the upper display is the set point. The set point is locked, and changing it may
degrade the instrument’s performance. The actual laser current and the set point should be
close but not the same. An
ON/OFF
button appears beneath the actual current when a
password has been entered on the
Configuration
tab. Use this button turn the laser current on
and off.
Laser temp
displays the pump laser temperature in arbitrary units. The lower display box is the
actual temperature, while the upper box displays the set point. The set point is locked, and
changing it may degrade the instrument’s performance. As with the laser current parameter, the
laser temp’s set point and actual values should be close but not the same. The laser temp value
for a laser at room temperature should be approximately 1.0.
