Download Multisizer 4 - Beckman Coulter

Troubleshooting
Viewing Advanced Multisizer Settings
CAUTION
Do not change the default Measurement Current setting. The measurement
current is not the current setting that will be used during analysis runs.
•
In the Auto-Set Current and Gain pane, the Initial Current field displays the initial current
in µA.
•
If Enable Aperture Current Checking is selected, the Multisizer 4 software verifies that the
system can supply the voltages selected in the Measurement Current, Initial Current, and
analysis current and gain fields. If the current exceeds the setting in the Maximum Voltage
field, the following error message will display:
Reduce Aperture Current or Preamp Gain
•
The Gain Stage Offsets pane displays gain stage measurements. For information on these
settings, see Measuring Gain Stage Offsets, page 9-3.
•
Click ( Defaults ) to display system default settings. Although you can view the defaults, it is
not possible to apply the settings unless you are running Service Mode (page 9-18).
•
The ( Read-only ) button indicates that settings in this window are for viewing only. It is not
possible to change aperture resistance settings unless you are running Service Mode
(page 9-18).
To change aperture resistance settings:
1. Select Run > Troubleshooting > Enter Service Mode on the Main Menu bar.
NOTE
Entering Service Mode will allow you to change default settings in the Troubleshooting menu.
If you do not enter Service Mode, settings in the Troubleshooting menu will appear as read-only
values.
2. Select Run > Troubleshooting > Aperture Resistance Settings on the Main Menu bar.
3. In the Aperture Resistance Settings window, modify the fields as necessary and click ( OK ) . For
more information on fields and values in the Aperture Resistance Settings window, see Aperture
Resistance Settings, page 9-12.
CAUTION
Beckman Coulter does not recommend that you change aperture resistance
settings without the assistance of a trained Service Representative (see
Requesting Service and Technical Support, page 9-15).
Calibrating the Electrolyte and Waste Jars
The fluid levels in the Electrolyte and Waste Jars are calculated by weight. It is usually necessary to
calibrate the weight sensors only once, when you set up the Analyzer. If you switch to an electrolyte
with significantly greater density, it is possible that you will need to recalibrate the Electrolyte and
Waste Jar sensors.
PN A51387AB
9-13
9