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General Information
I-8
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
Refer to
Figure I-3
.
Inlet Valve –
Accepts the sample stream via 1/4 inch NPTF connector. The
operator must supply the sample with a pressure between 14 and 100 psig.
Inlet Filter –
60 micron stainless steel filter traps particulate matter in the
sample stream.
Bypass/Needle Valve –
Used to redirect flow in the bypass system.
Pressure Regulator –
Adjusts flow on the incoming sample stream.
Flow Meter –
Measures the sample flow rate.
Check Valve –
Prevents the backflow of sample.
Restrictor Tube Assembly –
Used in conjunction with the pressure
regulator to lower downstream pressure.
Reagent Manifold –
Directs the sample flow in and out of the reagent
bottle assembly.
Reagent Bottle Adapter Assembly –
Connects the reagent bottle assembly
to the manifold.
Diffusion Tubing Assembly –
Semi-permeable tubing through which
reagent diffuses into the sample.
Reagent Bottle –
Contains formic acid reagent that lowers the sample pH
to below 4.
Flow Cell –
Contains the calcium sensing electrode, reference electrode and
ATC probe.
Diverter Valve –
Allows the flow cell reservoir to fill during calibration by
forming a closed-loop system.
Calcium Electrode –
Senses calcium ions in the sample stream and
produces an electrical potential dependent on sample concentration.
Reference Electrode –
Provides a constant reference potential and
completes the measurement circuit.
Reference Electrode Filling Solution Bottle –
Provides constant flow of
electrolyte solution through the reference electrode for maximum stability.
Glossary