Thermo Scientific Orion 2120XP User manual

Thermo Scientific
Orion 2120XP Calcium
Hardness Analyzer
User Guide
263639-009 Rev. A 09-09

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1
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
Table of Contents
Chapter I
GeneralInformation............................................ I-1
Introduction.............................................I-1
FeaturesandBenefits.......................................I-2
PrinciplesofOperation.....................................I-3
PrinciplesofCalibration....................................I-5
Double Known Addition (DKA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-5
OfflineCalibration.......................................I-6
FluidicsDiagram..........................................I-7
Glossary ................................................I-8
Two Channel Analyzer Configurations . . . . . . . . . . . . . . . . . . . . . . . . I-10
Chapter II
AnalyzerPreparation...........................................II-1
UnpackingtheAnalyzer ....................................II-1
Mounting and Plumbing Instructions . . . . . . . . . . . . . . . . . . . . . . . . . .II-2
SampleRequirements......................................II-3
ElectricalWiring..........................................II-4
SafetyRequirements .....................................II-4
Warning Labels and Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II-5
WiringtheAnalyzer .......................................II-6
TerminalAssignments......................................II-8
Electrode Wiring Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .II-9
Installation of Reagent and Diffusion Tubing . . . . . . . . . . . . . . . . . . .II-10
Installation of New Electrode Cables. . . . . . . . . . . . . . . . . . . . . . . . . .II-11
Installation of a New Calcium Electrode . . . . . . . . . . . . . . . . . . . . . . .II-12
InstallationoftheATCProbe...............................II-12
Installation of a New Reference Electrode . . . . . . . . . . . . . . . . . . . . . .II-13
Chapter III
AnalyzerOperation............................................III-1
Description of Basic Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III-1
DescriptionofKeypadIcons................................III-2
UseoftheSetupMode....................................III-3
SetupModeOverview.....................................III-5
Shutdown and Start-Up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . III-35

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Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
Chapter IV
Calibration...................................................IV-1
CalibrationSetup ........................................IV-1
FlowCellOperation......................................IV-2
RinsingtheFlowCell.....................................IV-3
AirRegulation...........................................IV-4
Before Performing a DKA Calibration. . . . . . . . . . . . . . . . . . . . . . . . . IV-5
Performing a DKA Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-6
CalibrationAbortSteps...................................IV-10
CalibrationErrorCodes ..................................IV-11
Calibration At Custom Concentrations Using DKA . . . . . . . . . . . . . IV-13
SpanCheckProcedure....................................IV-14
Offline Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV-15
Chapter V
AnalyzerMaintenance .........................................V-1
MaintenanceSchedule......................................V-1
WeeklyMaintenance.......................................V-1
MonthlyMaintenance......................................V-2
Yearly Preventative Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .V-5
Chapter VI
Troubleshooting ..............................................VI-1
DiagnosticsMode........................................VI-1
SlopeProblems..........................................VI-9
TroubleshootingMatrix...................................VI-11
Error/EventCodes.......................................VI-14
ResettingtheAnalyzer....................................VI-17
Serial Number and Software Revision . . . . . . . . . . . . . . . . . . . . . . . . VI-18
ServiceandRepair.......................................VI-19
Chapter VII
CustomerService.............................................VII-1
NoticeofCompliance. ...................................VII-1
WEEECompliance......................................VII-1
DeclarationofConformity................................VII-2
TermsandConditions....................................VII-3
Appendix .....................................................A-1
MountingDimensions .....................................A-1
ISEDefaultValues ........................................A-2
Specifications ............................................A-3
OrderingInformation......................................A-7
Recommended Consumables for Annual Operation . . . . . . . . . . . . . .A-10
PipetOperation..........................................A-11
PipetTechniques.........................................A-12

I-1
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
Chapter I General Information
This user guide covers the operation, maintenance and troubleshooting for
the Thermo Scientific Orion 2120XP calcium hardness analyzer, which
offers unmatched reliability in analyzing calcium hardness from sodium
zeolite softener effluent and drinking water applications.
Monitoring the calcium hardness ion content to prevent boiler tube
scaling or to control water hardness in municipal water applications
requires a well designed and maintained system. The system must optimize
the fluidic design with the sensing technology to provide accurate and
precise results with an almost instantaneous indication of calcium hardness
concentration changes.
The 2120XP calcium hardness analyzer meets all of the criteria for accurate
and dependable calcium hardness monitoring and more. The 2120XP
analyzer incorporates innovative technologies that include:
• Premium electrodes
• Accurate and precise flow cell design
• Marquee help screen
• Pump-less reagent addition and DKA calibration system
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer
• Power
• Pulp and paper
• Chemical / petrochemical
• Municipal drinking water
• Zeolite softener effluent monitoring
• Water softening
• Blending applications
Introduction
Markets
Applications

General Information
I-2
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
The Thermo Scientific Orion 2120XP calcium hardness analyzer is ideal
for measuring and monitoring the critical calcium hardness levels in any
softener effluent or drinking water application. With limited maintenance
requirements and low reagent usage, the 2120XP analyzer can also be used
in remote monitoring applications.
• Measurement of calcium hardness in water using premium Thermo
Scientific Orion ion selective electrode (ISE) technology.
• Accurate and precise measurements in the range of 25 ppb to 500 ppm:
• Reliable measurements and a wide measurement range with
selectable resolution.
• Measures calcium ion activity in aqueous solutions quickly,
accurately and economically.
• Premium reference and sensing electrodes:
• Superior accuracy and stability over a wide temperature range.
• Advanced flow cell design with air stirring:
• Automatic sample handling and contamination control with no
moving parts.
• Patented scrolling marquee:
• Intuitive menu-driven digital user interface.
• Data log of previous measurements and calibration:
• View measurement, calibration and error history.
• Self diagnostics:
• Ease of maintainability.
• Password protection:
• Security and peace of mind for your operation.
• Auto-ranging electronics with an easy to read backlit LCD display:
• Analyzer determines the best range.
Features and Benefits

General Information
I-3
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.
Principles of Operation
Safety Drain for
Reagent Overflow
Restrictor Tubing
Pressurizes Flow Cell
to Initiate Siphoning
Flow Meter
Valve Positions
Calibration Mode - PUSH
Sample/Measure Mode - PULL
Analyzer
1 2 3 4 5
Power
4-20mA Output
Air Pump
F
l
ow Meter
Inlet Valve
Bypass / Needle
Valve and Filter
Regulator
Valve
Reference Solution
Calibration
Port
Sense
REF TEMP
Flow Cell Block
Calibration Level
Air Filter
Reagent
Reagent Bottle
Diffusion Tube
Reagent Manifold
Fluid Path
Fluid Restrictor Tubing
Electric
Air Path
Reference Solution Path
Reagent Overflow Path
Diffusion Tubing
K E Y
Main Feed
Air Inlet
Measure Level
Drain
Check
Valve
Sample
Valve
Valve
ve
al
Val
Cal
Figure I-1
2120XP Schematic

General Information
I-4
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
The sensing electrode responds logarithmically to changes in the calcium
ion concentration. This response is described by the Nernst equation:
E = Eo+ 2.3 (RT/nF) log (C/Ciso)
Where:
E = measured electrode potential, mV
Eo= potential, when C equals Ciso, mV
R = ideal gas constant
T = temperature of sample, degrees K
n = valence of ionic species (+2 for calcium ion)
F = Faraday’s constant
C = effective calcium ion concentration (activity)
Ciso = concentration (activity) of calcium ion where potential E is
temperature independent (isopotential point)
The above equation indicates that the measured potential varies with both
temperature and the concentration of the ion of the interest. In order to
eliminate error caused by fluctuations in sample temperature, the 2120XP
analyzer microprocessor constantly updates temperature corrections from
data supplied by the ATC probe.
From the Nernst equation, the theoretical response of a calcium ion
selective electrode to a ten-fold change in concentration at 25 °C is
+29.58 mV. This is referred to as the electrode slope (S). Most electrodes,
however, do not exhibit a theoretical slope. Therefore, the analyzer is
calibrated to determine its actual value. Two standards are used to provide
information necessary for the microprocessor to compute the actual slope
and E0for use during sample analysis.
In order to eliminate interference from hydrogen ions, which can become
significant when measuring low levels of calcium hardness, the 2120XP
analyzer adjusts the sample pH. This pH adjustment is accomplished by
the patented passive-diffusion process wherein the sample passes through
a length of tubing contained in the reagent bottle. The reagent diffuses
through the tube wall and mixes with the sample, which adjusts the sample
pH to below 4.

General Information
I-5
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
Principles of
Calibration
Calibration procedures for analytical instruments are important and must
be performed carefully. The calibration procedure used in the Thermo
Scientific Orion 2120XP is a variation of Double Known Addition (DKA)
using advanced electrode and flow cell technology in combination with the
passive diffusion system. This method has the distinct advantages of being
fast, easy, and accurate.
Before calibration begins, the diverter valve is pushed in to divert flow from
the measure drain, allowing the flow cell to fill.
At the beginning of the DKA calibration the actual concentration in the
sample is unknown. The analyzer measures the potential (Es) and stores
this value in the microprocessor. A known amount of standard 1 solution
is added to the flow cell, which increases the concentration (Cs) with a
corresponding known amount (dC1). During this process, air is pumped
into the flow cell, thoroughly mixing sample and standard in a closed-
loop system. The new potential (E1) is measured and stored automatically
when stability is reached. Adding standard 2, preferably 10 times more
concentrated than standard 1, increases the concentration (dC2) in the
sample reservoir. Again, the new potential (E2) is measured and stored
when the reading is stable. Now, we have the following three unknowns:
Es=Eo+ S(Ts/298.15) log (Cs/Ciso)
E1=Eo+ S(T1/298.15) log [(Cs+ dC1)/Ciso]
E2=Eo+ S(T2/298.15) log [(Cs+ dC1+ dC2)/Ciso]
S is the Slope at 25 °C (298.15 K)
T is the temperature in Kelvin, measured when the potential E is measured.
Es, E1, E2have been determined during the calibration procedure. The
microprocessor solves these three equations, to obtain the values of S
and Eo. The calibration result is stored for use during online monitoring
to convert the measured potential and temperature in the sample into
concentration values in either ppm or ppb.
When the calibration is complete the flow cell drains as the sample flow
returns. The flow cell volume returns to the measurement level. After
allowing approximately 30 minutes for concentrated calibration solution
to be flushed from the system, the 2120XP analyzer can begin sample
measurement again.
In addition to Double-Known Addition (DKA), the 2120XP analyzer also
allows the operator the ability to perform an offline calibration.
Double Known
Addition (DKA)
Figure I-2
Flow Cell Volume for DKA

General Information
I-6
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
The offline calibration feature of the 2120XP analyzer allows the operator
to adjust the analyzer to values determined by alternate methods used in
their laboratory such as elemental spectroscopy and ion chromatography.
The offline calibration is essentially a one point calibration. To perform an
offline calibration, a sample is taken from the bypass of the analyzer; the
sample concentration value is stored in memory; the sample is analyzed
by an alternate method of choice; the previously stored reading is adjusted
to the lab method result; and the analyzer is then returned to the analysis
mode. The term “offline calibration” refers only to the fact that a sample
from 2120XP analyzer bypass is taken “offline” for laboratory analysis; in
fact, no downtime is experienced during the procedure and the analyzer
remains online throughout.
Offline Calibration