Flow Cell Operation - Thermo Scientific Orion 2111XP Manual

Section 4 | Calibration
Application
Feedwater/ make-up

water
Boiler feedwater

Demineralized water

Steam condensate

Cation exchange

effluent
R/O effluent

Drum boiler water

Figure 21: Flow Cell Volumes
|
56 Orion 2111XP Sodium Analyzer
Range DKA Standard
(Setup Mode)
Low Range
Std1
0.1 ppb to 100
Std2
ppb
Mid Range
Std1
0.3 ppb to
Std2
1 ppm
High Range
Std1
100 ppb to 20
Std2
ppm

Flow Cell Operation

The sample reservoir in the flow cell, as shown in Figure 21, has two sample volumes: a normal
operation volume of 20 mL and a highly accurate and individually calibrated flow cell volume of
approximately 95 mL. The lower volume results in fast system response while online and the
higher volume ensures accuracy in calibration.
Recommendations
When the Thermo Scientific Orion 2111XP sodium analyzer is first commissioned, it is advisable
to flush out fluidics system overnight prior to initial calibration and use. The electronics need not
be turned on at this time. Refer to Section 4, Rinsing the Flow Cell.
For accurate volume displacement install the ATC probe, sodium sensing electrode and

reference electrode in their respective flow cell cap ports. Refer to Section 2, Installation of
a New Sodium Electrode; Section 2, Installation of the ATC Probe and Section 2,
Installation of a New Reference Electrode.
Close the calibration port.

Standard Standard
Concentration
Volume
19.1 ppm 0.1 mL
192.0 ppm 0.1 mL
192.0 ppm 0.1 mL
1910 ppm 0.1 mL
1910 ppm 0.1 mL
19200 ppm 1.1 mL
Standard Cat. No.
181140 (Low Level Standard 1)
181140 (Low Level Standard 2)
181140 (Low Level Standard 2)
181141 (High Level Standard 1)
181141 (High Level Standard 1)
181141 (High Level Standard 2)
Thermo Scientific