2110XP Ammonia Analyzer User Guide (1574 Kb) - Thermo Scientific

Calibration
Flow Cell Operation
The sample reservoir in the flow cell as shown in Figure IV-1, 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.
REF
TEMP
Sense
Calibration Port
Calibration Level
Measure Level
Figure IV-1
Flow Cell Block
Recommendations
When the Thermo Scientific Orion 2110XP ammonia monitor 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 Ammonia Electrode, Reference Electrode, and
ATC Probe.
• Close the calibration port.
• When rinsing the flow cell before a standard calibration, be sure to
rinse off the inside of the reservoir lid with de-ionized water to prevent
build up of ammonia contamination along the lid.
• To ensure the instrument achieves stability and minimize interference
during calibration, the user should minimize activity on system during
calibration.
Thermo Scientific Orion 2110XP Ammonia Monitor User Guide
IV-2