Micromeritics Elzone II 5390 Operator's Manual page 355

Appendix F
Background-Subtraction Analysis
Occasionally, the ratio between contaminates in the electrolyte and particles in a sample
can be low and, therefore, difficult to tell the difference between the two. When
performing an analysis, the desired ratio between sample particles and contamination
(sometimes called signal-to-noise ratio) in the electrolyte is approximately 99:1 in 1 mL
of electrolyte. In other words, for every 99 sample particles, there should be no more than
1 particle of contamination in the electrolyte.
When the signal-to-noise ratio drops below an unacceptable level, a procedure can be
performed to remove the presence of contaminates in the electrolyte from the analysis
data.
Creating the Sample File
1. Select File > New > Sample Information; the Create a Sample File dialog
containing templates is displayed.
2. Choose an appropriate template, then click
displayed.
3. On the Sample Information dialog:
a. Enter an appropriate description in the Sample field.
b. Select Background as the type of data.
c. Enter a dilution factor of 1.00.
d. Enter information in any other fields as desired (Operator, Submitter, etc.).
4. Click the Analysis Conditions tab, then:
a. Click the down arrow to the right of the Orifice Tube field and choose the orifice
tube you plan to use.
b. Select Specify Diameter range, then enter a range in the Minimum and
Maximum fields.
c. Click
Rate and enter the appropriate flow rate for the orifice tube being used. (Refer to
Table 3-1. Particle Concentration
OK
539-42822-01 (Rev A) - Nov 2017
to display the Flow Control dialog. Select Volumetric Flow
Flow Control
to return to the Analysis Conditions dialog.
Create ; the Sample Information dialog is
Guidelines, page 3-33 for guidelines.) Click
Elzone II 5390 Confirm
F-5