Yearly .Preventative .Maintenance - Thermo Scientific Orion 2120XP User Manual

Analyzer Maintenance
Yearly Preventive
Maintenance
Electrodes
Diverter Valve O-rings
valve stem
O-rings (2)
retaining ring
valve stem
Flow Cell Assembly
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
1. Replace the Thermo Scientific Orion reference electrode
(Cat. No. 100056). Refer to Chapter II, Installing a New Reference
Electrode for step-by-step instructions.
2. Replace the Thermo Scientific Orion fluoride sensing electrode
(Cat. No. 100049). Refer to Chapter II, Installing a New Calcium
Electrode for step-by-step instructions.
3. Replace the calibration solutions (Cat. No. 182040).
Dispose of all old solutions according to the MSDS instruction. MSDS
files can be downloaded at www.thermo.com/processwater.
Valve Stem O-rings
1. Remove the two screws that hold the valve stem assembly in place.
2. Gently pull on the valve stem to remove.
3. Slide off the two old O-rings and replace them. It is not necessary to
remove the retaining ring.
4. Place the assembly back into the manifold block and tighten screws.
Note: Do not use O-ring grease.
manifold
Manifold Face O-rings
face
1. Remove the reagent bottle assembly.
2. Remove the three O-rings from the face of the flow cell manifold.
3. Insert the new O-rings.
Reagent Bottle Assembly O-ring
1. When the reagent bottle is removed, replace the O-ring between the
bottle and adaptor.
Figure V-2
V-5