I-3
General Information
Thermo Scientific Orion 2111LL Sodium Monitor User Guide
ROSS and the COIL tradedress are trademarks of Thermo Fisher Scientific Inc. US Patent 6,793,787
The .sample .enters .the .Thermo .Scientific .Orion .2111LL .sodium .monitor .
and .passes .through .inlet .valve, .bypass .valve .assembly, .inlet .filter, .pressure .
regulator, .flow .meter, .calibration .shut-off .valve .and .into .the .restrictor .
tubing . .The .sample .then .passes .through .the .reagent .manifold .into .a .reagent .
bottle .through .a .diffusion .tubing .assembly .where .pH .adjustment .takes .
place . .The .pH-adjusted .sample .then .flows .into .the .flow .cell .via .the .diverter .
valve, .where .air .is .introduced .from .the .air .pump .to .ensure .proper .mixing .
and .fast .response . .The .sample .then .flows .into .an .atmospheric .drain .
Principles of Operation
Monitor
1
2
3
4
5
Power
4-20mA Output
Air P
ump
R
ef
er
en
ce
S
o
lu
tio
n
Main Feed
Cal
Sample
Inlet Valve
Needle Valve
& Filter
Regulator
Valve
Safety Drain
for DIPA overflow
Cal Shutoff
Valve
3 way
Right Valve
Restrictor Tubing
3 way
Left Valve
Diverter Valve
Recirculation Block
Flowcell Block
Measure Level
Calibration Level
Air Filter
Pressurizes flowcell
to initiate siphoning
C
ali
b
ra
te
C
ali
b
ra
te
Flowmeter
M
ix (measure)
Calibration
Port
DIPA
Reagent Bottle
Reagent Manifold
Diffusion Tubing
Drain
Se
n
se
REF
TEMP
Fluid Path
Fluid Restrictor Tubing
Electric
Air Path
Reference Solution Path
DIPA Overflow Path
Diffusion Tubing
K E Y
Diverter Valve Positions
Calibration Mode
Sample/Measure Mode
Calibrate
Valve Position
Siphon/
Measure
Calibrate
Valve Position
Mix/
Measure
Figure I-
Orion 2111LL Schematic
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