Principles Of Operation - Thermo Scientific Orion 2120XP User Manual

General Information

Principles of Operation

2120XP Schematic
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
The sample enters the Thermo Scientific Orion 2120XP calcium hardness
analyzer and passes through the inlet valve, bypass/needle valve, inlet filter,
pressure regulator, flow meter and into the restrictor tubing. The sample
then passes through the flow cell manifold into a reagent bottle through
a diffusion tubing assembly where pH adjustment takes place. The pH-
adjusted sample then flows back through the manifold into the flow cell
as air is introduced from the air pump to ensure proper mixing and fast
response. The sample then flows into an atmospheric drain via the
diverter valve.
Figure I-1
Safety Drain for
Reagent Overflow
Analyzer
1 2 3 4 5
Power
4-20mA Output
Calibration Level
Measure Level
Cal
Val Valve ve Valve al
Sample
Flow Cell Block
Valve Positions
Calibration Mode - PUSH
Sample/Measure Mode - PULL
Drain
Restrictor Tubing
Air Filter
Air Inlet
Pressurizes Flow Cell
to Initiate Siphoning
Calibration
Port
Inlet Valve
Reagent Manifold
Diffusion Tube
Reagent
Reagent Bottle Main Feed
K E Y
Electric
Fluid Path
Fluid Restrictor Tubing
Air Path
Reference Solution Path
Reagent Overflow Path
Diffusion Tubing
Check
Valve
Regulator
Valve
Bypass / Needle
Valve and Filter
I-3