Thermo Scientific SOLA II, User Manual

Page: 79 / 205

Configuration
Density Compensation Setup
Thermo Fisher Scientific SOLA II User Guide 6-25
9. Review/edit the frequency stored during calibration of the high standard.
You can do the same for the low standard or zero background accessing
the Low Cal KHz menu item.
Figure 6–57.
10. Calibration Output
Figure 6–58.
Density correction is used for reporting the total sulfur in ppm w/w and can
be accomplished using a density transmitter (densitometer) for each stream
with the output connected to the analyzer’s 4–20 mA inputs or by entering a
fixed correction factor.
When using the optional densitometer inputs, the densities that correspond to
4 mA and 20 mA must be entered. The analyzer maintains a moving average
of the 4–20 mA readings and converts the readings to g/cc using a linear
interpolation. The sulfur reading is then corrected by multiplying it by the
ratio between the calibration sample density and the measured density of the
sample.
When the density of the sample is known and remains relatively constant, a
fixed correction factor can be used. In this method, the total sulfur reading is
multiplied by the value entered. If no correction is desired, set the correction
factor to 1.000.
The following provides instructions for both methods. If using a densitometer,
refer to the instructions with Figures 6–59 through 6–63. Menu items for
stream 1 are used.
Density
Compensation
Setup