
IV-
Calibration
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 .reservoir .in .the .flow .cell .as .shown .in .
Figure IV-2
, .has .two .
sample .volumes: .a .normal-operation .volume .of .20 .mL, .and .a .highly .
accurate .and .individualy .calibrated .flowcell .volume .of .190 .mL . . .The .lower .
volume .results .in .fast .system .response .while .on-line, .and .the .higher .volume .
ensures .accuracy .in .calibration .
When .the .Orion .2111LL .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 .
Chapter IV,
Rinsing the Flow Cell
.
• . For .accurate .volume .displacement, .install .ATC, .sensing, .and .reference .
electrodes .in .respective .flow .cell .cap .ports . . .Refer .to
Chapter II,
Installation of New Sodium Electrode, Reference Electrode,
and .
ATC Probe
.
• . Close .calibration .port
• . When .rinsing .before .a .low-level .standard .calibration, .be .sure .to .rinse .
off .inside .of .reservoir .lid .with .de-ionized .water .to .prevent .build .up .of .
sodium .contamination .a .long .the .lid .
• . To .ensure .the .instrument .achieves .stability .and .minimizes .interference .
during .calibration, .the .operator .should .minimize .activity .on .system .
during .calibration .
Measure Level
Flowcell Block
Calibration Level
Calibration Port
Sense
REF
TEMP
Flow Cell Operation
Figure IV-
Recommendation
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