Beckman Coulter LS 13 320, User Manual

Page: 180 / 254

PN B05577AC 6-50
Sample Modules
Tornado Dry Powder System
Tornado Description
The Tornado DPS system consists of:
•
The Tornado DPS module
•
A vacuum source
•
A vacuum hose that connects the Tornado DPS to the vacuum
•
Sample tubes
The Tornado DPS provides automatic feed rate (obscuration) control. The set point for the
obscuration is user selectable between 4% and 8%. The accuracy of the average obscuration control
is better than ±2% from the set point. It is measured using the average obscuration set in the Run
Settings dialog box (see the Software section of this manual).
The system disperses cohesive powders without milling fragile materials. The dispersion of the dry
powders is comparable to the dispersion achieved when the samples are run wet with proper
manual pre-dispersion.
The sample to be measured is contained in the system to prevent airborne contamination of the
work area throughout. This is accomplished by maintaining a negative pressure (vacuum) system
for the sample path and trapping the sample via a filtration system in the vacuum.
Indicators
A set of LEDs mounted in the front panel of the module provide visual information about the status
of the system when it is operational. The indicators are active in manual mode as well as indicating
functions accessed through software.
Figure 6.35 Tornado DPS LED Indicators Error
A red LED which will flash on any error
condition.
Load Sample
Green when sample loading is possible.
Red at all other times while running.
Vacuum
Green when vacuum is within range.
Solid red when vacuum is low.
Flashing red if vacuum is high.
Power
Green when power is applied to the
module's Control PCB.