Yokogawa TB750G User Manual

User’s Manual

Model TB750G Right Angle Scattered Light Turbidimeter

Quick Start Manual

IM 12E01A06-02E

1st Edition

◆ INTRODUCTION

■ Structure of this Manual

This is a supplementary manual to TB750G Right Angle Scattered Light Turbidimeter for User's Manual IM 12E01A06-01E. This manual describes the specifications, installation, operation, maintenance, and troubleshooting. To use this instrument correctly, read this manual and User's Manual IM 12E01A06-01E thoroughly.

■ Before Measurement

The TB750G turbidimeter is preset with defaults prior factory shipment. Before measurement, verify that these factory default settings meet the operating conditions and if necessary, reconfigure parameters.

◆ Symbol and Notations Used in this Manual

■ Symbol

The following symbol is used in this manual.

CAUTION

■ Notations

Indicates that damage to software or hardware, or system failures could occur if instructions are not followed.

In this manual, operation keys, display messages, indicators, and LED lamps on the instrument are denoted in the following manner.

1. Operation keys are denoted by brackets [ ] – for example:

YES

: [YES] key

2. Indicators, messages, and numerical data on the display are denoted as follows: Message display: {*WASH} Data display: {2.05} (when lit), {2.05} (when flashing)

IM 12E01A06-02E

◆ Notice

■ About this Manual

●This manual should be passed on to the end user.

●This manual should be read thoroughly before operating the instrument.

●This manual explains the functions contained in this product, but does not warrant

that they will suit the particular purpose of the user.

●The contents of this manual shall not be reproduced or copied, in part or in whole,

without permission.

●The contents of this manual are subject to change without prior notice.

●Every effort has been made to ensure the accuracy in the preparation of this manual.

However, if any errors or omissions are noticed, please contact the nearest Yokogawa representative or sales office.

■ Protection, Safety, and Modification of the Product

●The safety instructions described in this manual should be strictly observed to ensure

safety both of the product and the system controlled by the product.

●A protection or safety circuit should be installed externally, if needed. Do not attempt

to modify or add such circuit to the inside of the equipment.

■ Limitation of Liability

●Yokogawa grants no warranties other than the express warranty set forth under the

warranty provisions.

●Yokogawa shall not be liable to you or any third party for any damage, including

consequential or incidental damages, arising out of or in connection with the use of this equipment, defects beyond our knowledge, or any other contingency beyond our control.

IM 12E01A06-02E

Contents

◆ INTRODUCTION.......................................................................................................... 1

◆ Symbols and Notations Used in this Manual ................................................................ 1

◆ Notice ............................................................................................................................. 2

1. OVERVIEW................................................................................................................... 5

1.1 Features ...............................................................................................................5

1.2 Measurement Principle ........................................................................................ 5

2. PIPING AND WIRING ................................................................................................. 6

2.1 Piping ................................................................................................................... 6

2.1.1 System Using Open Head Tank and Zero Turbidity Filter ........................ 6

2.1.2 System without Head Tank and Zero Turbidity Filter ...............................7

2.2 Wiring..................................................................................................................8

2.2.1 Wiring Required for TB750G .....................................................................8

2.2.2 Wiring for Detector .....................................................................................8

2.2.3 Wiring for Converter ................................................................................... 9

3. OPERATION ............................................................................................................... 11

3.1 Preparation ......................................................................................................... 11

3.1.1 Outline ....................................................................................................... 11

3.1.2 Converter Operation Panel ........................................................................12

3.1.3 Calibration ................................................................................................. 12

3.1.4

3.1.5 Performing 2-point Calibration Using Standard Solution ........................17

3.2 Normal Operation.............................................................................................. 18

3.2.1 When Sample Water Supply is Cut Off ...................................................18

3.2.2 Shutdown ...................................................................................................18

3.2.3 Restart ........................................................................................................ 18

Performing Zero/span Calibration Using Filtered Water as Zero Reference ...

4. PARAMETER SETTING ............................................................................................ 19

4.1 Outline of Operation, Setting, and Service Levels...........................................19

4.2 Operation Level.................................................................................................20

4.3 Setting Level ..................................................................................................... 21

4.4 Service Level.....................................................................................................22

4.5 Procedures for Setting Parameters ....................................................................24

5. MAINTENANCE......................................................................................................... 27

5.1 Lamp Replacement............................................................................................ 27

5.2 Calibration ......................................................................................................... 28

5.2.1 Outline ....................................................................................................... 28

5.2.2 2-point Calibration Using Turbidity Standard Solutions..........................28

6. TROUBLESHOOTING ............................................................................................... 29

Revision Record .................................................................................................................... 1

IM 12E01A06-02E

Contents

IM 12E01A06-02E

1. OVERVIEW

1.1 Features

The TB750G is a process turbidimeter employing the right angle light scattering method, and has the following features.

• Highly reliable measurement with excellent linearity and repeatability

- Linearity: ±2% of reading or ±0.01 NTU, whichever is greater

- Repeatability: ±1% of reading or ±0.002 NTU, whichever is greater

- Display resolution: 0.001 NTU

• Easy-to-clean measurement cell

• Compact, lightweight converter and detector

• User configurable analog output range

- Analog output range: 0-0.2 NTU to 0-100 NTU

• Analog output range switching (2 or 3 ranges)

• Enhanced self-diagnostic function as standard

- Light source failure, input element failure, calibration failure, various circuit failures, etc.

• Detector designed to remove influence of air bubbles

• A wide range of measurement conditions

- Low flow rate: 0.05 to 20 l/min {0.8 to 317 gal/h}

- High pressure: Up to 500 kPa {72 psi}

- Sample temperature: 0 to 50°C {32 to 122°F}

• Detector can be connected for in-line analysis

• 2 analog outputs, 3 relay contact outputs, and 1 serial communication

• Many options available upon request

• Ultrasonic transducer and oscillator for ultrasonic cleaning

• Various head tanks to accommodate application requirements

1. OVERVIEW

1.2 Measurement Principle

The measuring system of the TB750G turbidimeter, comprised of a detector and a converter, complys with USEPA 180.1.

Scatted Light Detection Element

Measuring

Water

IM 12E01A06-02E

Light Source

(Lamp)

Figure 1.1 Measurement Principle

Lens

Scatted Light Detector

Receiver (Darkroom)

Measurement Window (Glass)

F0101.EPS

2. PIPING AND WIRING

2.1 Piping

Piping methods depend on the application, select the appropriate system configuration, and install pipes accordingly following examples.

2.1.1 System Using Open Head Tank and Zero Turbidity Filter

This is a typical system. A piping diagram is shown in Figure 2.1. Air bubbles in a water sample are removed by an open head tank and the water sample is introduced into the detector at a stable flow rate.

Sample Water

T ap Water

Head Tank

Sample Water Valv e

T ap W ater Valv e

Zero Turbidity

Filter

Drain

Valv e

Drain

Sample Water

Zero Water

Drain Valv e

Drain

Sample Water Inlet

Sample Water Supply Valv e

Zero Water Supply Valv e

Flow Control Valve

Sample Water

Outlet

TB750G Detector

Other Turbidity Detectors

Drain Port

Drain Valv e

Drain

Sample Water Effluent

Drain

F0320.EPS

Figure 2.1 Piping Diagram

• To prevent corrosion of water inside the zero turbidity filter, allow water to flow through the filter and flow out from the zero water drain valve continuously at a flow rate of approximately 10 ml/min.

• When using filtered water as zero reference, install a filter with the appropriate pore size depending on the measuring range.

Measuring range of less than 2 NTU: 0.2 µm Measuring range of 2 NTU or greater: 1 µm

IM 12E01A06-02E

2.1.2 System without Head Tank and Zero Turbidity Filter

This is a simple system where a water sample is taken from the process and directly introduced into the detector. This system configuration can be used when a water sample contains a negligible amount of air bubbles or when the turbidity of a water sample is high and the effect of air bubbles is nonsignificant.

CAUTION

Sample water conditions and ambient temperature must meet the specifications: maximum pressure: 500 kPa; sample temperature: 0 to 50°C; ambient temperature: -5 to 50°C.

Process Piping

Flow Control Valve

Sample Water

Outlet

TB750G Detector

2. PIPING AND WIRING

Sample Water Effluent

Drain

Sample Water

T ap W ater

Sample Water Valv e

T ap W ater Valv e

Zero Turbidity

Filter

Sample Water

Zero Water

Drain Valv e

Sample Water Supply Valv e

Zero Water Supply Valv e

Sample Water

Inlet

Other Turbidity Detectors

Drain Port

Drain Valv e

Drain

F0325.EPS

Figure 2.2 Piping Diagram

• The flow control should not be done on the inlet side of the detector.

• To prevent corrosion inside the zero turbidity filter, allow water to flow through the filter and flow out from the zero water drain valve continuously at a flow rate of approximately 10 ml/min.

IM 12E01A06-02E

2. PIPING AND WIRING

2.2 Wiring

2.2.1 Wiring Required for TB750G

TB750G Turbidity converterTB750G Turbidity detector

Power

supply *

Grounding *

(100V or less)

Power supply

cable

CONVERT-

POWER

TUS

U1U2

TUS400G Ultrasonic Oscillator

L2 L1

(Note) Dotted wiring is external wiring. Use cable with 6 to 12 mm OD for wiring. *1 Power terminal "G" on detector, detector case, and converter case must be grounded (ground resistance: 100V or less). *2 External grounding terminal of ultrasonic oscillator must be grounded (ground resistance: 100V or less). *3 Use 2-conductor shielded cable for analog output wiring and serial communication wiring. *4 The wiring configuration is described below in case that RS-232C serial communication is selected.

Serial com-

munication (RS-232C)

U1 U2 U3

Dedicated cable (1/2/3m)

Grounding * (100V or less)

TXD

RXD

SG G

Ultrasonic transducer connecting cable

(maximum length: 15m) (customer wiring)

RS-232C

Serial commu-

Analog output 1

(4-20mA DC) *

Analog output 2

(4-20mA DC or 0-20mA DC) *

3 *4

nication *

(RS-422)

Contact input

SENSOR

RX+ RX-

RS-422

TX+ TX- SG G

IN1

INPUT

IN2

COM

mA1

mA2

RANGE

OUTPUT

FAIL

NO NC

COM

NO NC

COM

NO NC

COM

Contact

output S1

Contact output S2

Contact output FAIL

Range contact output

Grounding *

(100V or less)

*5 When option code "/US" is specified, TUS400G should be purchased separately. When TUS400G is used in system, the power supply to TB750G should be the same as the supply voltage specified in

the MS Code of TUS400G.

Figure 2.3 Connection Diagram

2.2.2 Wiring for Detector

Wire for connections to the following terminals: (1) Power supply terminals;

(2) Power supply terminals for ultrasonic oscillator (when option code "/US" is

specified); and,

(3) External grounding terminal.

F18.EPS

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(1) Power Supply Terminals

2. PIPING AND WIRING

Terminals TM3 (Power to Lamp)

Terminal G (For Converter 2 Detector Connecting Cable)

(2) Power Supply Terminals for Ultrasonic Oscillator

Connector for Converter 2 Detector Cable

Figure 2.4 Internal View of Detector

(3) External Grounding Terminal (M5 Screw) (Norminal size of at least 2 mm

Figure 2.5 Grounding Terminal of Detector

F0310.EPS

)

F0319.EPS

2.2.3 Wiring for Converter

Wire for connections to the following terminals: (1) Analog output/contact input terminals;

(2) Contact output/range contact output terminals; (3) Serial communication terminals (when in use); and, (4) Grounding terminal.

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