Hach 1950Plus Instrument Manual

Brand: Hach

Model: 1950Plus

Type: Instrument Manual

Catalog Number 4195M0040

1950Plus UV Process TOC Analyzer

Instrument Manual

8/06 3ed

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4195M0040title page.fm

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4195M0040TOC.fm Table of Contents

Table of Contents

Safety Precautions.................................................................................................................................................... 7

Use of Hazard Information.................................................................................................................................. 7

Potential Safety Hazards.................................................................................................................................... 7

Precautionary Labels.......................................................................................................................................... 8

Electrical and Burn Precautions ......................................................................................................................... 8

Précautions à prendre pour éviter les brûlures et les risques électriques.......................................................... 8

Venting Waste Gases......................................................................................................................................... 9

Décharge des gaz usés...................................................................................................................................... 9

Chemical Precautions......................................................................................................................................... 9

Précautions à prendre contre les risques chimiques.......................................................................................... 9

Carrier Gas Precautions..................................................................................................................................... 9

Précautions à prendre à l'égard du gaz vecteur............................................................................................... 10

Sample Stream Precautions............................................................................................................................. 10

Précautions à prendre à l'égard du flux d'échantillon....................................................................................... 10

Disposing of used UV Lamps........................................................................................................................... 11

Élimination des lampes UV usées.................................................................................................................... 11

Technical Specifications ......................................................................................................................................... 13

Section 1 Introduction.......................................................................................................................................... 15

1.1 System Description........................................................................................................................................... 15

1.2 Applications....................................................................................................................................................... 15

1.3 Major Components............................................................................................................................................ 15

1.3.1 Liquids Enclosure .................................................................................................................................... 17

1.3.2 Electronics Enclosure.............................................................................................................................. 17

1.3.3 Front Panel .............................................................................................................................................. 20

1.4 Analysis Process............................................................................................................................................... 20

1.5 Installation......................................................................................................................................................... 21

1.6 Start-up and Operation ..................................................................................................................................... 21

1.7 Calibration......................................................................................................................................................... 21

1.8 Miscellaneous ................................................................................................................................................... 21

1.9 Technical Support and Assistance.................................................................................................................... 21

1.10 EPA Mode ....................................................................................................................................................... 22

1.10.1 Connection Information ......................................................................................................................... 23

Installation............................................................................................................................................................. 25

Section 2 Unpacking, Installation, and Setup .................................................................................................... 27

2.1 Unpacking and Installation................................................................................................................................ 27

2.1.1 Unpacking and Inspection ....................................................................................................................... 27

2.1.2 Location Criteria ...................................................................................................................................... 27

2.2 Wiring the Instrument........................................................................................................................................ 30

2.2.1 Wiring the Instrument for ac Power ......................................................................................................... 35

2.2.2 Selecting the Voltage............................................................................................................................... 38

2.3 Wiring the Relays.............................................................................................................................................. 39

2.4 Analog Outputs ................................................................................................................................................. 41

2.5 Serial Data Connections ................................................................................................................................... 41

2.5.1 Installation ............................................................................................................................................... 42

2.5.2 Optional Blowback Filter Valve................................................................................................................ 45

2.5.3 Optional Level Detector Configuration..................................................................................................... 46

2.6 Carrier Gas and Fluid Connections................................................................................................................... 46

2.7 Connection Information..................................................................................................................................... 46

2.8 Drain and Vent Connections ............................................................................................................................. 47

2.8.1 Dual Stream Option.......................................................................................................

.......................... 47

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4195M0040TOC.fm

Table of Contents

Section 3 Preparing Reagents and Calibration Standards ............................................................................... 49

3.1 Types of Fluids.................................................................................................................................................. 49

3.2 Recommended Tools and Materials.................................................................................................................. 49

3.3 Obtaining DI Water............................................................................................................................................ 49

3.4 Preparing Calibration Standards....................................................................................................................... 50

3.4.1 Organic Calibration Standards ................................................................................................................ 50

3.5 Preparing Phosphoric Acid Solution ................................................................................................................. 50

3.6 Preparing Sodium Persulfate Solution .............................................................................................................. 52

3.7 Preparing the Cleaning Solution ....................................................................................................................... 52

3.8 Storage and Handling Tips................................................................................................................................ 53

Section 4 Commissioning the Analyzer.............................................................................................................. 55

4.1 Precomissioning Requirements ........................................................................................................................ 55

4.2 Start–up Instructions......................................................................................................................................... 55

4.2.1 Start the Liquids and Gas Flowing........................................................................................................... 55

4.2.2 Run a Validation ...................................................................................................................................... 57

4.3 Analyzer Adjustments ....................................................................................................................................... 57

Operation............................................................................................................................................................... 61

Section 5 Setup and System Configuration ....................................................................................................... 63

5.1 Setup Menu Structure....................................................................................................................................... 63

5.2 Setup Menu....................................................................................................................................................... 63

5.2.1 Level Criteria Screen............................................................................................................................... 63

5.2.2 Auto Options Screen................................................................................................................................ 68

5.2.3 Timing Screen ......................................................................................................................................... 69

5.2.4 Periods Screen........................................................................................................................................ 72

5.2.5 Time/Date screen .................................................................................................................................... 74

5.2.6 Mapping................................................................................................................................................... 75

5.2.7 Serial Menu ............................................................................................................................................. 80

5.2.8 Tolerances Screen................................................................................................................................... 83

5.2.9 Language Screen.................................................................................................................................... 85

5.2.10 Analyzer Screen .................................................................................................................................... 86

5.2.11 EPA Main Operating Screen.................................................................................................................. 86

5.2.12 Stream Screens..................................................................................................................................... 87

5.2.13 Loss of Flow .......................................................................................................................................... 87

5.3 Analyzer Hardware Configuration ..................................................................................................................... 88

5.4 Application Screens .......................................................................................................................................... 88

Section 6 Operation.............................................................................................................................................. 89

6.1 Front Panel........................................................................................................................................................ 89

6.2 Display .............................................................................................................................................................. 89

6.3 Operation Menu Structure................................................................................................................................. 90

6.4 Keypad.............................................................................................................................................................. 91

6.4.1 Single Button Presses............................................................................................................................. 91

6.4.2 Dual Button Presses................................................................................................................................ 91

6.5 Status Indicators ............................................................................................................................................... 91

6.6 Power Interruption............................................................................................................................................. 92

6.7 Operating Screens............................................................................................................................................ 92

6.7.1 Dual Stream Operating Screen ............................................................................................................... 92

6.7.2 Analyzer Status Display Options ............................................................................................................. 92

6.7.3 Alternative Screens ................................................................................................................................. 93

6.7.4 Main Operating Screen............................................................................................................................ 94

6.8 Navigating the Menus and Screens...........................................................................................

....................... 94

Table of Contents

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4195M0040TOC.fm Table of Contents

6.8.1 Passcode Protection................................................................................................................................ 95

6.9 Validation Menu................................................................................................................................................. 95

6.9.1 Performing a New Validation.................................................................................................................... 96

6.10 Calibration Menu............................................................................................................................................. 96

6.10.1 Calibration Overview and Options......................................................................................................... 96

6.10.2 Calibration Screen................................................................................................................................. 99

6.10.3 Manual Zero Calibration ........................................................................................................................ 99

6.10.4 Manual Span Calibration ..................................................................................................................... 100

6.10.5 Primary Zero/Primary Span Calibration............................................................................................... 102

6.10.6 Autocal Standard Screen..................................................................................................................... 102

6.10.7 Multi-point Calibrations........................................................................................................................ 102

6.11 Grab Sample Menu....................................................................................................................................... 106

6.12 Manual Control.............................................................................................................................................. 107

6.12.1 Initiate Clean........................................................................................................................................ 107

6.12.2 Initiate Calibration................................................................................................................................ 107

6.12.3 Initiate Validation ................................................................................................................................. 107

6.12.4 Go Online ............................................................................................................................................ 107

6.12.5 Inhibit Next Clean ................................................................................................................................ 108

6.12.6 Inhibit Next Calibration......................................................................................................................... 108

6.12.7 Inhibit Next Validation.......................................................................................................................... 108

6.12.8 Active Calibration Set Selection........................................................................................................... 108

6.12.9 Reboot System?.................................................................................................................................. 108

6.13 Manual Control for Selecting Stream 1 or 2.................................................................................................. 108

Maintenance ........................................................................................................................................................ 109

Section 7 Maintenance ....................................................................................................................................... 111

7.1 Electrostatic Discharge (ESD) Considerations................................................................................................ 111

7.2 Cleaning.......................................................................................................................................................... 111

7.3 Periodic Maintenance...................................................................................................................................... 112

7.4 Shut Down....................................................................................................................................................... 112

7.5 Pump Tube Replacement................................................................................................................................ 113

7.6 IR Cell Cleaning.............................................................................................................................................. 116

7.7 Pressure/Leak Test ......................................................................................................................................... 119

7.8 IR Cell Replacement....................................................................................................................................... 119

7.8.1 Thumb Latch Adjustment....................................................................................................................... 119

7.9 IR Gas Calibration........................................................................................................................................... 121

7.9.1 IR Gas Calibration Procedure................................................................................................................ 121

7.10 Cleaning the Gas Liquid Separator (GLS) .................................................................................................... 123

7.11 Replacing a UV Lamp................................................................................................................................... 123

7.12 Mirror Assembly Adjustment......................................................................................................................... 125

7.13 Replacing the Fuses ..................................................................................................................................... 127

Section 8 Troubleshooting and Service Menus................................................................................................ 129

8.1 Preliminary Check........................................................................................................................................... 129

8.2 Troubleshooting............................................................................................................................................... 129

8.2.1 Instrument Does Not Calibrate.............................................................................................................. 129

8.2.2 Instrument is Unstable or Drifts............................................................................................................. 130

8.2.3 Periodic Spikes in the Readout.............................................................................................................. 130

8.3 Maintenance Code Diagnostics ...................................................................................................................... 132

8.4 Fault Code Diagnostics................................................................................................................................... 135

8.5 Service Menu Structure ................................................................................................................................ 137

8.6 Service Menus ..............................................................................................................

.................................. 138

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8.6.1 Relay Test.............................................................................................................................................. 138

8.6.2 Valve Test .............................................................................................................................................. 139

8.6.3 Input Status ........................................................................................................................................... 139

8.6.4 IR Cal..................................................................................................................................................... 142

8.6.5 Output Adjust......................................................................................................................................... 143

8.6.6 Setting the Elevation.............................................................................................................................. 144

8.6.7 UV Block Selection................................................................................................................................ 144

8.7 Fault/Maintenance Event Codes..................................................................................................................... 145

8.8 Fault ID Codes ................................................................................................................................................ 145

Appendix A TC Conversion................................................................................................................................. 147

TC Conversion—No Dilution .......................................................................................................................... 147

TC Conversion—With Dilution........................................................................................................................ 149

Appendix B Analyzer Pump Configurations......................................................................................................... 153

Appendix C Glossary........................................................................................................................................... 161

Appendix D Replacement Parts .......................................................................................................................... 165

Appendix E Form................................................................................................................................................. 173

Problem Report Form ........................................................................................................................................... 174

General Information............................................................................................................................................ 175

How to Order......................................................................................................................................................... 177

Repair Service ...................................................................................................................................................... 178

Limited Warranty................................................................................................................................................... 179

Certification........................................................................................................................................................... 180

Safety Notes ......................................................................................................................................................... 183

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Safety Precautions

UVTOCSafety Precautions.fm

Safety Precautions

Please read this entire manual before unpacking, setting up, or operating this instrument.

Pay particular attention to all danger and caution statements. Failure to do so could result in serious injury to the

operator or damage to the equipment.

To ensure the protection provided by this equipment is not impaired, do not use or install this equipment in any

manner other than that which is specified in this manual.

Use of Hazard Information

If multiple hazards exist, this manual will use the signal word (Danger, Caution, Note) corresponding to the

greatest hazard.

Danger: Indicates a potentially or imminently hazardous situation which, if not avoided, could

result in death or serious injury.

Caution: Indicates a potentially hazardous situation that may result in minor or moderate injury.

Information that requires special emphasis.

Each English-language Danger and Caution statement contains a cross-reference to a manual section where the

statement is presented in German, French, Spanish, and Italian.

Potential Safety Hazards

The following potential safety hazards are associated with operating the analyzer:

See Appendix C page 161 for a list

of abbreviations, acronyms and

definitions used in this manual.

• Electrical (line voltage)

• Components radiating ultraviolet energy

• Potentially hazardous chemicals

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Safety Precautions

UVTOCSafety Precautions.fm

Safety Precautions

Precautionary Labels

Read all labels and tags attached to the instrument. Personal injury or damage to the instrument could occur if

not observed.

Electrical and Burn Precautions

When installing or servicing power connections be careful to:

The analyzer is designed to

comply with the US and Canadian

NEC and the European low

voltage directive. Do not modify

any internal electrical or

electronic parts because changes

may nullify CE compliance.

• Disconnect line power before servicing or repairing the unit.

• Comply with all local and national regulations when you make electrical

connections.

• Use ground fault circuit breakers whenever possible.

• Properly ground the unit for continuous operation.

• Never disconnect a UV lamp from its power supply while the lamp is on.

• Never look at a lighted UV lamp. UV emissions can damage skin

and eyes.

• Do not touch the lamp sheaths without protective equipment.

Précautions à prendre pour éviter les brûlures et les risques électriques

• Pendant l'installation et l'entretien des branchements électriques, faire

très attention aux points suivants:

This symbol, if noted on the instrument, references the instruction manual for operation

and/or safety information.

This symbol, when noted on a product enclosure or barrier, indicates that a risk of electrical shock

and/or electrocution exists and indicates that only individuals qualified to work with hazardous voltages

should open the enclosure or remove the barrier.

This symbol, when noted on the product, identifies the location of a fuse or current limiting device.

This symbol, when noted on the product, indicates that the marked item can be hot and should not be

touched without care.

This symbol, when noted on the product, indicates the presence of devices sensitive to Electro-static

Discharge and indicates that care must be taken to prevent damage to them.

This symbol, when noted on the product, identifies a risk of chemical harm and indicates that only

individuals qualified and trained to work with chemicals should handle chemicals or perform

maintenance on chemical delivery systems associated with the equipment.

This symbol, if noted on the product, indicates the need for protective eye wear.

This symbol, when noted on the product, identifies the location of the connection for Protective Earth

(ground).

Safety Precautions

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UVTOCSafety Precautions.fm Safety Precautions

• Couper le courant avant de procéder à l'entretien ou à la réparation

de l'unité.

• Respecter toutes les réglementations locales et nationales en vigueur

pour les branchements électriques.

• Utiliser des disjoncteurs de défaut de masse, dans la mesure du possible.

Ne pas modifier de pièce

électrique ou électronique

interne. Tout changement risque

d'annuler la garantie, d'engendrer

des dangers électriques et de

supprimer la conformité CE.

• Mettre l'unité correctement à la masse pour un fonctionnement

en continu.

• Ne jamais débrancher une lampe UV de son alimentation électrique

lorsque la lampe est allumée.

• Ne jamais regarder une lampe UV allumée. Les rayons UV risquent

d'endommager les yeux et la peau.

• Ne jamais toucher les manchons d'une lampe sans porter de

protections adéquates.

Venting Waste Gases

Vent all waste gases to the atmosphere or a safe place.

Décharge des gaz usés

Décharger tous les gaz dans l'atmosphère ou en un lieu sécurisé.

Chemical Precautions

Section 3.4 page 50 contains a list of compounds approved as standards appropriate for the analyzer. Some of

these compounds are toxic. Take appropriate precautions when handling these chemicals or their solutions.

See Safety Note 1. page 183 for French, German, Spanish, or Italian translation.

Minimize the physical contact and inhalation of vapors of a calibration compound.

Précautions à prendre contre les risques chimiques

La Section 3.4 page 50 contient une liste des composés homologués pour être utilisés dans les solutions avec

l'analyzer. Certains de ces composés sont toxiques. Prendre les précautions qui s'imposent pour la manipulation

de ces produits chimiques et de leurs solutions. Certaines des précautions à prendre sont présentées ci-dessous.

Cette liste n'est pas exhaustive.

Limiter au strict minimum tout contact physique et toute inhalation des vapeurs de composés de solutions

d'étalonnage.

Carrier Gas Precautions

The analyzer requires a purified air or pure nitrogen carrier gas for operation. When handling the carrier gas,

you must take the same precautions required when using any high pressure/compressed gas system.

These precautions include, but are not limited to, the following:

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Safety Precautions

UVTOCSafety Precautions.fm

Safety Precautions

Oxygen is not a suitable carrier gas

for this analyzer.

• Compressed gas must be handled according to local/national regulations

and manufacturer guidelines to avoid accidents.

• Transfer gas cylinders by carts, hand trucks, or dollies.

• Secure gas cylinders properly during storage or transport.

• Leave valve safety covers on cylinders during storage and transport.

• Minimize the use of adapters or couplers with compressed gas.

• Permanently identify gas cylinder contents.

The rate of consumption of carrier gas to the sparger is 220 cc/min. Carrier gas flow to the reactor(s) varies

between 40 and 230 cc/min., depending on the instrument’s range.

Précautions à prendre à l'égard du gaz vecteur

L'exploitation de l'analyzer fait appel à un gaz vecteur purifié/artificiel ou azote pur. Manipuler le gaz vecteur en

prenant les mêmes précautions que pour l'utilisation de tout système de gaz comprimé/pressurisé. Certaines des

précautions à prendre sont présentées ci-dessous. Cette liste n'est pas exhaustive.

• Toute manipulation de gaz comprimé doit s'effectuer dans le plus strict

respect des réglementations locales et nationales en vigueur et des

instructions des fabricants, afin d'éviter tout risque d'accident.

• Pour transporter les conteneurs de gaz, utiliser des chariots, ou les

transpalettes.

• Fixer les conteneurs de gaz en toute sécurité pendant leur stockage et

leur transport.

• Ne jamais enlever les couvercles de sécurité des vannes des conteneurs

pendant leur stockage et leur transport.

• Limiter au minimum l'utilisation d'adaptateurs et de coupleurs avec le gaz

comprimé.

• Procéder à l'identification permanente du contenu des conteneurs de gaz.

Le débit de passage de gaz vecteur sur le dégazeur est de 200 cc/min. Le débit de gaz vecteur sur le(s)

réacteur(s) varie entre 40 et 200 cc/min., en fonction de l'échelle de l'instrument.

Sample Stream Precautions

It is the responsibility of the user to establish the potential hazard associated with each sample stream. See section

3.7 on page 52 for a list of components (and their composition) that come in contact with the sample. Take

appropriate precautions to avoid unnecessary contact with any unknown sample stream that may contain trace

chemical, radiation, or biological hazards.

Précautions à prendre à l'égard du flux d'échantillon

Le section 3.7 on page 52. L'utilisateur assume l'entière responsabilité de la définition des dangers potentiels

associés à chaque flux d'échantillon. Prendre toutes les précautions qui s'imposent pour éviter tout contact inutile

avec tout flux d'échantillon inconnu susceptible de présenter des risques chimiques, radioactifs ou biologiques.

Safety Precautions

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UVTOCSafety Precautions.fm Safety Precautions

Disposing of used UV Lamps

The UV lamps contain mercury. Used lamps must be disposed of in accordance with all appropriate national and

local environmental and hazardous material laws and regulations.

Élimination des lampes UV usées

Les lampes UV contiennent du mercure. Les lampes UV doivent être jetées conformément aux lois et aux

réglementations sur la protection de l'environnement et sur le rejet de matériaux dangereux en vigueur sur le plan

national et sur le plan local.

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Safety Precautions

UVTOCSafety Precautions.fm

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Technical Specifications

UVTOCSpecifications.fm

Technical Specifications

Specifications relate only to standard analyzer configurations and are subject to change without notice.

Operation

Analysis method:

UV persulfate oxidation with acid sparging for TIC removal followed by CO

NDIR detector

measurement

Measurement range:

TOC from 0–5 up to 0–20,000 mg/L

Response time:

T90 ≤ 8 minutes*; T20 ≤ 3 minutes (range dependant)

Accuracy/Repeatability/Linearity:

±2% of full scale nondiluted range

±4% of full scale diluted range

Method detection limit per EPA Appendix B to Part 136:

≤ 0.015 mg/L at range 0–5 mg/L at 25 °C (77 °F)

Signal drift (60 days):

< 2% with auto-clean and auto-calibration

Environmental Conditions

Indoor use:

Temperature 5–40 °C (41–104 °F)

Maximum relative humidity 80% for temperatures up to 31 °C decreasing linearly to 50% relative

humidity at 40 °C

Mains supply voltage fluctuations not to exceed ±10% of the nominal voltage

Transient overvoltages according to Installation Categories (Over voltage Categories) II

per IEC 664

POLLUTION DEGREE 2 in accordance with IEC 664

Enclosure:

Cold rolled epoxy powder-coated steel; optional stainless steel

Weight: 54 kg (120 lb) for epoxy-coated steel cabinet

User connections:

5 function mapped alarm relays

3A @ 250 V ac / 0.5A @ 30 V dc

Two user configurable, optically isolated, self powered 4–20 mA outputs. Maximum resistive load

600 ohms.

Optional multifunction isolated RS232 or RS485 serial port for CSV output or Modbus

communication. See Appendix D on page 165 for kit reorder numbers.

*Response time is range dependent.

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Technical Specifications

UVTOCSpecifications.fm

Technical Specifications

Samples

Single stream fast loop inlet

Inlet pressure:

0.15–6 bar (2–87 psig)

Outlet pressure:

Ambient

Inlet temperature:

2–70 °C (36–158 °F)

Flow rate:

25–200 mL/minute

Power Requirements

Switch selectable 115 or 230 V ac ±10%, 50/60 Hz

Wire size information:

Rigid solid: 0.2–4 mm

; flexible stranded: 0.2–2.5 mm

; AWG: 24–12

Maximum power consumption:

300 VA

Installation Category:

Fuses:

AC mains fused for single phase only. For fuse requirements, see section 7.13 on page 127.

Carrier Gas Requirements

Carrier Gas Usage:

450 cc/min in TOC mode; 250 cc/min in TC mode

Clean, CO

free air at 2.8 bar (40 psig) minimum to 3.8 bar (55 psig) maximum. Recommended

3.1 bar (45 psi).

Page 15

UVTOCIntroduction.fm Introduction

Section 1 Introduction

1.1 System Description

See Appendix C on page 161 for a

list of abbreviations, acronyms, and

definitions used in this manual.

This manual applies only to Cat. No. H-4195; –X010; –X020; –X030; –X040;

–X050; –X060; –X070; –X080 and H-6195– analyzers and describes the

installation and operation of the analyzer, shown in Figure 1 on page 16. The

analyzer measures organic carbon in liquid samples ranging from 0.015 mg/L

to 20,000 mg/L. In the analysis process, carbon is converted to

carbon dioxide, which is then measured with an IR detector. The analyzer

uses the EPA approved UV-persulfate oxidation method, which produces the

most reliable TOC measurement. The analyzer meets customer specifications

worldwide, and complies with ISO, EPA, EN, DIN, CE, UL, CSA, FM,

and NAMUR regulations.

Software navigation is simplified by the use of dialog prompts for single

sample analysis, analyzer validation, and analyzer calibration.

The analyzer is capable of local 4–20 mA, optional RS232 CSV data logging,

and ModBUS communication.

The analyzer is designed to facilitate customer maintenance. All key

components are located for easy access. All connection ports are located on

the outside of the analyzer. A dual-stream option is available.

Sample dilution can be added to the standard instrument. The optional

dilution configuration is shown in illustrations throughout this manual.

1.2 Applications

The analyzer can measure either Total Carbon (TC) or Total Organic Carbon

(TOC) in water continuously or from grab samples. It is recommended for use

in the following applications:

• Boiler feed water

• Bulk chemical

• Pharmaceutical process water

• Condensate and cooling water

• Unit out fall

• Industrial wastewater

• Industrial effluents

1.3 Major Components

There are two enclosures—one for liquids and one for electronics.

The enclosures are available in epoxy powder coated steel or stainless steel.

The top electronics enclosure is separate and sealed from the bottom liquids

enclosure. Refer to Figure 1.

Page 16

Major Components

UVTOCIntroduction.fm

Section 1

Figure 1 Major Components*

1. Electronics Enclosure 2. Liquids Enclosure 3. Display/Keypad

* The optional dilution configuration is shown in illustrations throughout the manual.

Section 1

Page 17

UVTOCIntroduction.fm Major Components

1.3.1 Liquids Enclosure

This enclosure houses the inlet, sparger, and reactor manifold. In addition, it

contains the gas-liquid separator (GLS), the pumps, the UVassembly, and the

liquid drains.

• Fluid flow is simplified by using three manifold assemblies:

• The inlet manifold contains all the connections for reagents, stream,

and calibrations standards, and associated valves

(Figure 2 on page 18).

• The sparger manifold is integrated with the flow control and pressure

gauge. It provides the mixing of the acid and sample as well as the

liquid flow detection. See Figure 3 on page 19.

• The reactor manifold provides the mixing of sample and persulfate

(Figure 2 on page 18).

• Two pump motors are used for the entire analyzer range. Different pump

heads are used to obtain different ranges (Figure 2 on page 18).

Some optically inhomogeneous

sample compositions will provide

false triggering, requiring that the

flow failure be disabled in the

Service\Input Status screen.

• The UV reactor assembly is capable of mounting up to four standard UV

lamps and their encapsulated electronic switching power supplies

(Figure 2 on page 18).

• Flow detection is available as sample and reactor flow using bubble

detection, which is fed into the electronic assembly for appropriate action.

1.3.2 Electronics Enclosure

This enclosure contains the IR bench, the 8000 Display/Controller PCB

assembly, the 8001 I/O Termination PCB assembly, and the configurable

115/230 V 50/60 Hz analyzer power supply. The front panel of this enclosure

contains the window for the 2 line x 16 character alphanumeric display, three

analyzer status LEDs, and the four-button tactile membrane keypad (Figure 3

on page 19 and Figure 4 on page 20).

Additional information on the front panel is contained in section 1.3.3 on

page 20.

• The 8000 Display/Controller PCB assembly is factory configured to

an IR range of either 1,000 or 10,000 ppm CO

and a liquid range

between 0–5 mg/L and 0–20,000 mg/L TOC. Connection to the IR

block uses a 25-way ribbon D connector. Connection to the 8001 I/O

is via a ribbon cable.

• The 8001 I/O Termination PCB assembly provides the connection

point for five function-mapped relays and/or two parameter-mapped

4-20 mA analog outputs.

• The power supply, from an input of 115 V ac or 230 V ac, provides

115 V ac for the pumps and 24 V dc for the rest of the electronics. The

power supply is shown in Figure 3 on page 19.

All user connections inside the electronics enclosure are screw

down terminals.

Page 18

Major Components

UVTOCIntroduction.fm

Section 1

Figure 2 Liquids Enclosure

1. Gas Waste Vent 6. Sparger Manifold and Pressure Gauge

2. Condenser 7. Persulfate and Resample Pump

3. Gas Liquid Separator (GLS) 8. Reactor Manifold

4. Sample Inlet Manifold 9. UV Lamp Assembly

5. Acid and Sample Pump (Optional on-board

dilution shown)

10. Pump Bracket Assembly with flow controller

Section 1

Page 19

UVTOCIntroduction.fm Major Components

Figure 3 Electronics Enclosure

1. Infrared (IR) Bench 4. 8000 Display/Controller Printed Circuit Board Assembly

2. 8001 I/O Termination Printed Circuit Board Assembly 5. Surge Suppressor (ac power connections)

3. Power Supply

Page 20

Analysis Process

UVTOCIntroduction.fm

Section 1

1.3.3 Front Panel

Detailed information on the LEDs,

keypad, and menu functions can be

found in Section 5 on page 63.

The two-line, 16-character alpha-numeric backlit display is mounted on the

rear of the 8000 Display/Controller PCB assembly. Refer to Figure 4.

Three front-panel LEDs indicate analyzer status. These will normally be

extinguished unless they represent the assigned condition. A1 and A2

indicate that a first level or second level rising nonlatching alarm exists. F will

illuminate if a fault or maintenance request has occurred.

The user keypad consists of four membrane button keys. These buttons will

have different functions depending on whether or not the analyzer is in the

menu system. Combination button presses will result in different functionality,

dependent on the software state.

Figure 4 Front Panel

1.4 Analysis Process

The analysis takes place in a two-stage process. First, the Total Inorganic

Carbon (TIC) is removed by acidification prior to the analysis, leaving an

inorganic-free sample. Secondly, the analyzer converts the carbon in the

sample to CO

in a low temperature UV reactor. An IR detector measures the

, which is proportional to the carbon concentration in the sample.

This TOC measurement is sometimes referred to as NPOC.

Acidification

The sample is acidified with phosphoric acid in the TIC sparger. This converts

the inorganic carbon to CO

. This CO

is removed from the sample at the

GLS and is vented to the atmosphere. The sample, which now contains only

organic carbon, is pumped from the TIC sparger to the UV reactor for further

analysis. (Only TOC analysis requires acidification. If you are measuring TC,

your analyzer will not acidify the sample.)

1. Alphanumeric Display Window 2. Tactile Membrane Keypad 3. Three Analyzer Status LEDs

Ctrl

Enter

A1 A2 F

Escape

Program Mode

1 3

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Hach 1950Plus Instrument Manual

Brand: Hach

Model: 1950Plus

Type: Instrument Manual

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Hach 1950Plus Instrument Manual

Hach 1950Plus Instrument Manual

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