Beckman Coulter Multisizer 4, User Manual

Page: 208 / 238

PN A51387A
B
9-2
Troubleshooting
Resolving Common Problems
Measuring the Noise Level
When you install a new aperture tube using the Change Aperture Tube Wizard (page 3-21 ), the
Wizard prompts you to measure the noise level. After installing an aperture tube, you can measure
the noise level at any time using the Troubleshooting menu.
To measure the noise level:
1. Place a beaker of clean electrolyte on the Analyzer platform.
2. Select
Run > Troubleshooting > Check the Noise Level
on the Main Menu bar. The Check Noise
Level window opens.
3. In the Check Noise Level window, click
(
Measure Noise Level
)
.
4. When measurement is complete, the Check Noise Level window displays the noise level and
threshold information (either Threshold is too low or Threshold is OK).
If the threshold is set too low, increase the threshold in the Create SOM Wizard (page 4-2 ) or the
Edit the SOM window (page 4-23 ).
If noise levels remain high or variable after troubleshooting, contact Beckman Coulter Field Service
(page
9-15 ).
Purging the Metering Pump
Purging the metering pump removes air from a small chamber in the pump. Air can enter this
chamber when the Analyzer is moved or shipped. When there is air in the metering pump, the
Multisizer 4 software may display the following error message:
Flow Rate is too high, there may be air in the system. Try Flush Aperture Tube and Purge
Metering Pump.
If this error message appears, select
Run > Troubleshooting > Purge Metering Pump
.
The Status Panel displays progress.
If troubleshooting does not resolve the problem, contact Beckman Coulter Field Service (page 9-15 ).