YOKOGAWA ISC450G User's Manual

User’ s Manual

Model ISC450G [Style: S2] Inductive Conductivity Converter

IM 12D06D05-01E

3rd Edition

Note This page may be referred to when

reading pages where subsequent submenu screens are shown in the text. Connection to the relevant submenu screen is indicated by a doted line with an arrow. Note that screens in the text are typical examples and actual screens may differ depending on the set parameters.

Measurement setup

 Measure Conductivity only Configure sensor

 Temperature settings  Temp. Compensation  Calibration settings  Concentration

Enter

Commissioning

Connection to the relevant submenu screen is indicated by a doted line with an arrow.

PREFACE

Electrostatic discharge

The EXAxt converter contains devices that can be damaged by electrostatic discharge. When servicing this equipment, please observe proper procedures to prevent such damage. Replacement components should be shipped in conductive packaging. Repair work should be done at grounded workstations using grounded soldering irons and wrist straps to avoid electrostatic discharge.

WARNING

Installation and wiring

The EXAxt converter should only be used with equipment that meets the relevant IEC, American or Canadian standards. Yokogawa accepts no responsibility for the misuse of this unit.

CAUTION

The Instrument is packed carefully with shock absorbing materials, nevertheless, the instrument may be damaged or broken if subjected to strong shock, such as if the instrument is dropped. Handle with care.

WARNING

• Do not use an abrasive or organic solvent in cleaning the instrument.

• Do not modify the ISC450G converter.

• Substitution of components may impair

suitability for Division 2.

Do not remove or replace while circuit is live

unless area is know to be non-hazardous.

Explosion Hazard – Do not disconnect

equipment unless area is known to be nonhazardous.

Do not reset circuit breaker unless power

has been removed from the equipment or the area is known to be non-hazardous.

Notice

• This manual should be passed on to the end

user.

• The contents of this manual are subject to

change without prior notice.

• The contents of this manual shall not be

reproduced or copied, in part or in whole, without permission.

• This manual explains the functions

contained in this product, but does not warrant that they are suitable the particular purpose of the user.

• Every effort has been made to ensure

accuracy in the preparation of this manual.

However, when you realize mistaken

expressions or omissions, please contact the nearest Yokogawa Electric representative or sales office.

• This manual does not cover the special specifications. This manual may be left unchanged on any change of specification, construction or parts when the change does not affect the functions or performance of the product.

• If the product is not used in a manner specified in this manual, the safety of this product may be impaired.

Yokogawa is not responsible for damage to the instrument, poor performance of the instrument or losses resulting from such, if the problems are caused by:

• Improper operation by the user.

• Use of the instrument in improper applications

• Use of the instrument in an improper environment or improper utility program

• Repair or modification of the related instrument by an engineer not authorized by Yokogawa.

Safety and Modification Precautions

• Follow the safety precautions in this manual when using the product to ensure protection and safety of the human body, the product and the system containing the product.

The following safety symbols are used on the product as well as in this manual.

DANGER

This symbol indicates that an operator must follow the instructions laid out in this manual in order to avoid the risks, for the human body, of injury, electric shock, or fatalities. The manual describes what special care the operator must take to avoid such risks.

WARNING

This symbol indicates that the operator must refer to the instructions in this manual in order to prevent the instrument (hardware) or software from being damaged, or a system failure from occurring.

CAUTION

This symbol gives information essential for understanding the operations and functions.

Note!

This symbol indicates information that complements the present topic.

This symbol indicates Protective Ground Terminal

Warranty and service

Yokogawa products and parts are guaranteed free from defects in workmanship and material under normal use and service for a period of (typically) 12 months from the date of shipment from the manufacturer. Individual sales organisations can deviate from the typical warranty period, and the conditions of sale relating to the original purchase order should be consulted. Damage caused by wear and tear, inadequate maintenance, corrosion, or by the effects of chemical processes are excluded from this warranty coverage.

In the event of warranty claim, the defective goods should be sent (freight paid) to the service department of the relevant sales organisation for repair or replacement (at Yokogawa discretion). The following information must be included in the letter accompanying the returned goods:

• Part number, model code and serial

number

• Original purchase order and date

• Length of time in service and a description of the process

• Description of the fault, and the circumstances of failure

• Process/environmental conditions that may be related to the failure of the device.

• A statement whether warranty or nonwarranty service is requested

• Complete shipping and billing instructions for return of material, plus the name and phone number of a contact person who can be reached for further information.

This symbol indicates Function Ground Terminal (Do not use this terminal as the protective ground terminal.)

This symbol indicates Alternating current.

This symbol indicates Direct current.

Returned goods that have been in contact with process fluids must be decontaminated/disinfected before shipment. Goods should carry a certificate to this effect, for the health and safety of our employees. Material safety data sheets should also be included for all components of the processes to which the equipment has been exposed.

TABLE OF CONTENTS

PREFACE

1. INTRODUCTION AND GENERAL DESCRIPTION .....................................................1

1-1. Instrument check ................................................................................................... 1

1-2. Application .............................................................................................................1

2. GENERAL SPECIFICATIONS OF EXAxt ISC450G ....................................................2

3. INSTALLATION AND WIRING .....................................................................................5

3-1. Installation and dimensions ...................................................................................5

3-1-1. Installation site ..........................................................................................5

3-1-2. Mounting methods .....................................................................................5

3-2. Wiring ....................................................................................................................7

3-2-1. Preparation ................................................................................................7

3-2-2. Cables, Terminals, glands and conduit adapter .......................................8

3-3. Wiring the power supply ........................................................................................ 9

3-3-1. General precautions ..................................................................................9

3-3-5. Grounding the housing ............................................................................10

3-3-6. Switching on the instrument ....................................................................10

3-3-2. Access to terminal and cable entry .........................................................10

3-3-3. AC power ................................................................................................10

3-3-4. DC power ................................................................................................10

3-4. Wiring the contact signals.................................................................................... 11

3-4-1. General precautions ................................................................................11

3-4-2. Contact outputs .......................................................................................11

3-4-3. Contact input ...........................................................................................11

3-5. Wiring the mA-output signals............................................................................... 11

3-5-1. General precautions ................................................................................11

3-5-2. Analog output signals ..............................................................................11

3-6. Wiring the sensor.................................................................................................12

3-6-1. General precautions ................................................................................12

3-6-2. Connecting the sensor cable to the converter ........................................12

3-6-3. Installation of the sensor .........................................................................12

3-6-4. Sensor cable connections using junction box (BA10) and

extension cable (WF10) ..........................................................................13

iii

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4. OPERATION OF EXAxt ISC450G .............................................................................16

4-1. Main display functions ......................................................................................... 16

4-2. Trending graphics ................................................................................................16

4-3. Zoom in on details ............................................................................................... 16

4-3-1. Actual mA1 ..............................................................................................17

4-3-2. Actual mA2 ..............................................................................................17

4-3-3. S1/S2/S3/S4 ............................................................................................17

4-3-4. C.C. (factory). ..........................................................................................17

4-3-5. C.C. (adjusted) ........................................................................................17

4-3-6. Temp. comp 1 .........................................................................................17

4-3-7. Temp. comp 2 .........................................................................................17

4-3-8. Sensor ohms. ..........................................................................................17

4-3-9. Last calibrated at .....................................................................................17

4-3-10. Calibration due at ..................................................................................17

4-3-11. Projected calibration at .........................................................................17

4-3-12. HART ID ................................................................................................17

4-3-13. Software revision ...................................................................................18

4-3-15. Logbook ................................................................................................18

4-3-16. Trouble shooting ..................................................................................18

4-4. Information function .............................................................................................18

4-5. Setup-Calibration & commissioning.....................................................................18

4-6. Secondary- primary value display switch ............................................................18

4-7. Navigation of the menu structure ........................................................................19

5.MENU STRUCTURE COMMISSIONING ....................................................................20

5-1. Configure sensor ................................................................................................ 20

5-2. Temperature setting ............................................................................................. 20

5-3. Temperature compensation .................................................................................20

5-4. Calibration settings ..............................................................................................22

5-5. Concentration ...................................................................................................... 22

5-6. mA output setup...................................................................................................24

5-7. Contact output setup ...........................................................................................26

5-8. Fail .......................................................................................................................28

5-9. Simulate...............................................................................................................28

5-10. Input contacts .................................................................................................... 28

5-11. Error configuration .............................................................................................30

5-12. Logbook configuration .......................................................................................30

5-13. Advanced setup .................................................................................................32

5-14. Display setup .....................................................................................................34

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6. CALIBRATION ...........................................................................................................36

7. MAINTENANCE .........................................................................................................38

7-1. Periodic maintenance .........................................................................................38

7-2. Periodic maintenance of the sensor ....................................................................38

7-3. Cleaning methods................................................................................................38

7-4. Contrast adjustment ............................................................................................38

8. TROUBLESHOOTING ...............................................................................................39

8-1. General ...............................................................................................................39

8-2. Calibration check .................................................................................................39

8-3. Predictive maintenance .......................................................................................39

8-4. Poor calibration technique ...................................................................................39

8-5. Error displays and actions ................................................................................... 39

9. QUALITY INSPECTION .............................................................................................40

10. SPARE PARTS ........................................................................................................44

APPENDICES ................................................................................................................45

APPENDIX 1 Temperature compensation ..................................................................45

APPENDIX 2 Temperature compensation matrix. ......................................................48

APPENDIX 3 Calibration solutions for conductivity ....................................................49

APPENDIX 4 Measurement principle ........................................................................ 50

APPENDIX 5 HART HHT (275/375) Menu structure ..................................................51

APPENDIX 6 Control drawing for FM approval ..........................................................55

Customer Maintenance Parts List (for Style: S2) ......................CMPL 12D06D05-02E

Revision Record ..............................................................................................................i

IM 12D06D05-01E

1. INTRODUCTION AND GENERAL DESCRIPTION

1 INTRODUCTION AND GENERAL DESCRIPTION

The Yokogawa EXAxt ISC450G is a converter designed for industrial process monitoring, measurement and control applications. This instruction manual contains the information needed to install, set up, operate and maintain the unit correctly. This manual also includes a basic troubleshooting guide to answer typical user questions.

Yokogawa can not be responsible for the performance of the EXAxt converter if these instructions are not followed.

1-1. Instrument check

Upon delivery, unpack the instrument carefully and inspect it to ensure that it was not damaged during shipment. If damage is found, retain the original packing materials (including the outer box) and then immediately notify the carrier and the relevant Yokogawa sales office.

Make sure the model number on the nameplate affixed to the top of the instrument agrees with your order. Example of the nameplate is shown below.

INDUCTIVE CONDUCTIVITY TRANSMITTER

MODEL SUFFIX

SUPPLY OUTPUTS AMB. TEMP. STYLE NO.

CUS

N200

ISC450G

4-20mA(mA1: +HART)

-20 to +55

°C

CL I, DIV 2, GROUPS ABCD T6 FOR Ta -20 to +55°C

SEE INSTRUCTION MANUAL TYPE 4X SEE CONTROL DRAWING NFM016-A9 P.1

Made in Japan

Figure 1-1. Nameplate

Note! The nameplate will also contain

the serial number and any relevant

certification marks. Be sure to apply

correct power to the unit, as detailed

on the nameplate.

1-2. Application

The EXAxt converter is intended to be used for continuous on-line measurement of Conductivity and/or Concentration in industrial installations. The unit combines simple operation and microprocessor-based performance with advanced self-diagnostics and enhanced communications capability to meet the most advanced requirements. The measurement can be used as part of an automated process control system. It can also be used to indicate operating limits of a process, to monitor product quality, or to function as a controller for a dosing/dilution system.

Sensors should normally be mounted close to the converter in order to ensure easy calibration and peak performance. If the unit must be mounted remotely from the sensors, WF10 extension cable can be used, up to a maximum of 50 metres (150 feet), with a BA10 junction box, and up 10 metres standard sensor cable.

The EXAxt is delivered with a general purpose default setting for programmable items (see Chapter 5). While this initial configuration allows easy start-up, the configuration should be adjusted to suit each particular application. An example of an adjustable item is the type of temperature sensor used. The EXAxt can be adjusted for a number of different types of temperature sensors.

Details provided in this instruction manual are sufficient to operate the EXAxt with all Yokogawa sensor systems and a wide range of third-party commercially available probes. For best results, read this manual in conjunction with the corresponding sensor instruction manual.

Yokogawa designed the EXAxt converter to withstand industrial environments. It meets all the CE regulatory standards. The unit meets or exceeds stringent requirements (see section

2) without compromise, to assure the user of continued accurate performance in even the most demanding industrial installations.

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2. GENERAL SPECIFICATIONS OF EXAxt ISC450G

A) Input specifications : Compatible with the Yokogawa inductive conductivity ISC40 series with

integrated temperature sensor: NTC30k or Pt1000

B) Input range

Conductivity : 0 to 1999 mS/cm at 25 °C (77 °F) reference temperature Minimum : 1 μS/cm (at process temperature) Maximum : 2 S/cm (at process temperature) Temperature : -20 to +140 ºC (0 to 280 ºF) Cable length : max. 60 metres (200 feet)

10 metres (35 feet) fixed sensor cable + 50 metres (165 feet) WF10 extension cable. Influence of cable can be adjusted by doing an AIR CAL with the cable connected to a dry cell

C) Accuracy (under reference conditions):

Conductivity : ≤ 0.5 % of reading ± 1.0 μS/cm Temperature : ≤ 0.3ºC (0.6ºF) Temp.compensation: ≤1 % for NaCl, ≤ 3 % for Matrix Step response : ≤ 4 seconds for 90 % (for a 2 decade step)

Note on performance specifications The following tolerance is added to above performance. mA output tolerance: ±0.02 mA of “4-20 mA“

D) Transmission signals

General : Two isolated outputs of 4-20 mA. DC with common negative. Maximum

load 600Ω. Bi-directional HART

digital communication, superimposed

on mA1 (4-20 mA) signal. Output function : Linear or 21-step table for Conductivity, Concentration or Temperature. Control function : PID control. Burn out function : Burn up (21.0 mA) or burn down (3.6 mA) to signal failure. acc.

NAMUR NE43. Parameters : Adjustable damping : Expire time Hold : The mA-outputs are frozen to the last/fixed value during calibration/

commissioning Cond. range : min span 10 μs/cm≥10% of high valve (20 mA)

max span 1999 mS/cm

E) Contact outputs

General : Four SPDT relay contacts with display indicators Switch capacity : Maximum values 100 VA, 250 VAC, 5 Amps. (*)

Maximum values 50 Watts, 250 VDC, 5 Amps. (*) Status : High/Low process alarms, selected from conductivity, concentration or

temperature. Configurable delay time and hysteresis : PID duty cycle or pulsed frequency control : FAIL alarm Control function : On / Off : Adjustable damping : Expire time

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Hold : Contact can be used to signal the HOLD situation. Fail safe : Contact S4 is programmed as fail-safe contact. (*)Note: When contact output current is more than 4 Amps, ambient temperature should be

less than 40 ºC.

F) Contact input : Remote range switching to 10 times the programmed range.

Contact open : If impedance > 100 kΩ: "Range1, 2" (“Programmed range for mA1 and mA2 output" is "Range1, 2.”) Contact closed : If impedance < 10 Ω: 10 x “Range1, 2"

G) Temperature compensation

Function : Automatic or manual, for temperature ranges mentioned under B

(inputs). Reference temp. : Programmable from 0 to 100 ºC or 30 - 210 ºF (default 25 ºC).

H) Calibration : Semi-automatic calibration using pre-configured OIML (KCl) buffer

tables, with automatic stability check

Manual adjustment to grab sample * Organisation Internationale de Metrologie Legale, international

recommendation nr. 56 standard solutions reproducing the conductivities of electrolytes, 1981.

GENERAL SPECIFICATIONS

I) Logbook : Software record of important events and diagnostic data readily

available in the display or through HART®.

J) Display : Graphical Quarter VGA (320 x 240 pixels) LCD with LED backlight and

touchscreen. Plain language messages in English, German, French,

Spanish, Italian, Swedish, Portuguese and Japanese.

K) Shipping details

Package size : 290 x 300 x 290 mm (L x W x D) (11.5 x 11.8 x 11.5 inch) Package weight : app. 2.5 kg (5.5 lbs) Converter weight : app. 1.5 kg

L) Housing : Cast aluminum housing with chemically resistant coating;

Polycarbonate cover with Polycarbonate flexible window : Protection IP66 / NEMA 4X / CSA Type 3S Colour : Silver grey ISC450-A(D)-A : IP66 cable glands are supplied with the unit ISC450-A(D)-U : NEMA 4X close up plugs are mounted in the unused cable entry holes

and can be replaced by conduit fittings as required

Pipe, Panel or Wall mounting using optional hardware Optional conduit adapter G1/2, 1/2NPT or M20 female

M) Power supply

ISC450G-A : Ratings; 100-240 V AC Acceptable range; 90 to 264 V AC

Ratings; 50/60 Hz Acceptable range; 50 Hz ±5%, 60 Hz ±5%

Power Consumption; 15 VA ISC450G-D : Ratings; 12-24 V DC Acceptable range; 10.8 to 26.4 V DC

Power Consumption; 10 W

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N) Safety and EMC conforming standards Safety : EN 61010-1

CSA C22.2 No.61010-1 UL 61010-1 FM3611 Class I, Div.2, Group ABCD,T6 for Ta -20 to 55ºC EMC : conforms to EN61326 Class A, AS/NZS CIPR 11 Installation altitude: 2000 m or less Category based on IEC 61010: II (Note) Pollution degree based on IEC 61010: 2 (Note) Note: Installation category, called over-voltage category, specifies impulse withstand voltage.

Category II is for electrical equipment.

Pollution degree indicates the degree of existence of solid, liquid, gas or other

inclusions which may reduce dielectric strength. Degree 2 is the normal indoor environment.

O) Environment and operational conditions

Ambient temperature: -20 to +55 ºC (-5 - 130 ºF) Storage temperature: -30 to +70 ºC (-20 - 160 ºF) Humidity : 10 to 90% at 40 ºC (100 ºF) RH (non-condensing) Data protection : EEPROM for configuration data and logbook. Lithium cell for clock Watchdog timer : Checks microprocessor Power down : Reset to measurement Automatic safeguard: Auto return to measuring mode when touchscreen is untouched for 10

min.

Model and Suffix Codes [Style: S2]

Model Suffix code Option code Description

ISC450G ----------------- ----------------- Inductive conductivity Converter

Power - A

- D

Type - A

- U

Mounting Hardware

Hood

Conduit adapter

Tag Plate

*1 If the tag number is predefined with the purchase, Yokogawa will inscript the tag plate with the specified tag number, and

program the tag number in the converter.

*2 Option codes /U, /PM, /H5, /AFTG, /ANSI and /AM20 are not specified for FM version (-U).

-----------------

/UM /U /PM /H5 /AFTG /ANSI /AM20 /SCT

AC version (100…240 VAC) DC version (12…24 VDC)

General purpose version FM version

Universal mounting kit (panel, pipe, wall) Pipe and wall mounting hardware (*2) Panel mounting hardware (*2) Awning hood (stainless steel) (*2) G1/2 (*2) 1/2NPT (*2) M20 (*2) Stainless steel tag plate (*1)

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3. INSTALLATION AND WIRING

3-1. Installation and dimensions 3-1-1. Installation site

The EXAxt 450 converter is weatherproof and can be installed inside or outside. It should, however, be installed as close as possible to the sensor to avoid long cable runs between sensor and converter. In any case, the cable length should not exceed 60 metres (200 feet). Select an installation site where:

• Mechanical vibrations and shocks are negligible

• No relay/power switches are in the direct environment

• Access is possible to the cable glands (see figure 3-1)

• The converter is not mounted in direct sunlight or severe weather conditions

• Maintenance procedures are possible (avoiding corrosive environments)

F Hood (Option code: /H5, some cutout on the left side cover)

The ambient temperature and humidity of the installation environment must be within the limits of the instrument specifications. (See chapter 2).

3-1-2. Mounting methods

Refer to figures 3-2 and 3-3. Note that the EXAxt converter has universal mounting capabilities:

• Panel mounting using optional brackets

• Surface mounting on a plate (using bolts from the back)

• Wall mounting on a bracket (for example, on a solid wall)

• Pipe mounting using a bracket on a horizontal or vertical pipe Size nominal 50A

Unit: mm (inch)

220(8.66")184(7.2")

3 INSTALLATION AND WIRING

144(5.67")

72(2.8")

(0.79")

144(5.67")

24.5(1") M20 cable gland

(0.79")

121.5(4.78")

(When shipped, not installed)

DEF

Grounding terminal (M4 screw)

A : For output signal B : For contact input C : For sensor cable D : For contact output (S1 and S2) E : For contact output (S3 and S4) F : For power supply

F Adapter for Coduit Work (optional)

(option code : / AFTG, / ANSI, / AM20)

Adapter

F G1/2 screw (/AFTG), F 1/2 NPT screw (/ANSI) F M20 screw (/AM20)

Figure 3-1. Housing dimensions and layout of glands

(1.93")

Approx. 55(2.2")

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138

(5.43

)

min.195(7.75

138(5.43")

)

min.185 (7.25")

138 (5.43

Unit: mm (inch)

)

138

(5.43

+1 0

)

Figure 3-2. Option /PM: panel mounting diagram (Note) When option code "/UM" is specified, universal pipe/wall/pannel mounting kit are supplied-

--same as option code "/U" and "/PM" both specified.

pipe mounting (horizontal)

2" ND. pipe

(7.87")

(1.38")

200

(0.6")

(3.15")

(2.75")

2x Ф6.5 (0.26")

4x Ф10 (0.4")

wall mounting

(0.51")

154.5

(6.08")

pipe mounting (vertical)

Figure 3-3. Option /U: wall and pipe mounting diagram

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potentiomerter

WARNING

This connector for software must be used only by

Yokogawa’s service personnel.

connector for (future) software

input terminal block

LCD bracket

6 X M20 glands

Note: ISC450G-A(D)-U

The enclosure is provided with stoppers in stead of M20 cable glands for the unused holes. These stoppers must be removed and replaced by FM approved conduit fittings in accordance with good installation practice. See APPENDIX 6, Control drawing for FM approval.

Figure 3-4. Internal view of EXAxt wiring compartment

3-2. Wiring 3-2-1. Preparation

Refer to figure 3-4. The relay contact terminals and power supply connections are under the screening (shielding) plate. These should be connected first. Connect the sensor, outputs

and HART

To open the EXAxt 450 for wiring:

1. Loosen the four frontplate screws and swing open the cover.

2. The upper terminal strip is now visible.

3. Remove the screen (shield) plate covering the lower terminal strip.

4. Connect the power supply and contact outputs. Use the three glands at the back for these cables.

communication connections last.

WARNING

Always place the screen plate over the power supply and contact terminals for safety reasons and to avoid interference.

5. Put back (replace) the screen (shield) plate over the lower terminals.

6. Connect the analog output(s), the sensor inputs, and, if necessary, the HART and input contact.

7. Use the front three glands for analog output, sensor inputs, contact input and HART® wiring (see figure 3-5).

8. Swing back the cover and secure it with the four screws.

9. Switch on the power. Commission the instrument as required or use the default settings.

output terminal block

protective shield bracket

wiring

3 INSTALLATION AND WIRING

DANGERDANGER

• Cables that withstand temperatures of at least 70 °C should be used for wiring.

• Wiring work should be performed to meet IP66 or higher requirements. Tighten four frontplate screws to 1.5 N·m torque.

CAUTION

Do not turn on power with the touchcsreen

pressed, otherwise inaccurate screen positioning will occur. If it occurs, leave the touchscreen unpressed, turn off power then on again. The screen positioning will be accurate.

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3-2-2. Cables, T erminals, glands and conduit adapter

ISC450G-A(D)-A The ISC450 is supplied with terminals suitable for the connection of finished wires in the size range of 0.13 to 2.5 sq.mm. (26 to 14 AWG). The cable glandes supplied will form a tight seal on cables with an outside diameter of 6 to 12 mm (0.24 to 0.47 inches). Unused cable entry holes must be sealed with cable glands including the blind plugs supplied.

ISC450G-A(D)-U The ISC450 is supplied with terminals suitable for the connection of finished wires in the size range of 14- 26 AWG. The cable entry holes are sealed with FM certified plugs. Prior to cable entry the plugs can be removed with allen key size 3/8” The cable conduit fittings can be mounted in the holes of the housing as required. The cable glands supplied with the unit will give a tight seal on cables with outside diameter of 0.24 to 0.47 inches.

High voltage section

Contact

(S1, S2)

output cables

Suitable for cables with an outside diameter between 6 - 12 mm (0.24 - 0.47”)

cables

Contact

(S3, S4)

output cables

Figure 3-5a. Cable glands diagram

Gland nut

O-ring

Gland

Input

contact

Contents:

NOTE: The glands must be installed properly to meet IP66 and NEMA 4X rating. Use close up plug for unused glands.

Power

cable

6 X Gland M20 6 X Close up plug 6 X Gland nut M20 6 X O-ring 17.12 X 2.62 EPDM 70° sh.

Sensor Cables

Close up plug

Figure 3-5b. How to install cable glands

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NOTE: Moisturize O-ring before assembling.

FRONT GLANDS REAR GLANDS

Sensor

output signals

HART

Contact output

Power

Contact input

mA1

mA2

Adapter for conduit work

When protect the cable with a conduit, replace the M20 cable gland with a cable gland of optional conduit adapter, and set the adapter shown as Figure 3-5c.

Nut

Approx. 55(2.2")

(1.93")

Adapter

Figure 3-5c. Conduit adapter

Unit: mm(inch)

Packing

3 INSTALLATION AND WIRING

G1/2 screw (/AFTG), 1/2 NPT screw (/ANSI)

M20 screw (/AM20)

Figure 3-6. System configuration

3-3. Wiring the power supply 3-3-1. General precautions

Make sure the power supply is switched off. Also, make sure that the power supply is correct for the specifications of the EXAxt and that the supply agrees with the voltage specified on the textplate.

DANGERDANGER

1. Install an external switch or circuit breaker

to the power supply of the converter.

2. Use an external switch or circuit breaker

rated 5A and conforming to IEC 60947-1 or IEC 60947-3.

3. It is recommended that the external switch

or circuit breaker be installed in the same room as the converter.

4. The external switch or circuit breaker should be installed within reach of the operator and identified with marking as a power supply switch to the converter.

5. Power lines such as power cables and contact outputs should be fixed securely onto a wall or construction using cable racks, conduit tubing, nylon bands or other appropriate ways. Accidental removal from terminals by pulling may result in electric shock.

Local health and safety regulations may require an external circuit breaker to be installed. The instrument is protected internally by a fuse. The fuse rating is dependent on the supply to the instrument. The 250 VAC fuses should be of the “time-lag” type, conforming to IEC127.

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WARNING

Fuse replacement should be performed only by a qualified service person. See Sec.7. MAINTENANCE, Fuse.

Fuse ratings:

Power supply Fuse type 12-24VDC, 10W max 2A/250V, Slow 100-240VAC, 15VA max 0.5A/250V, Slow

3-3-2. Access to terminal and cable entry

Terminals 1 and 2 are used for the power supply. Guide the power cables through the gland closed to the power supply terminals. The terminals will accept wires of 2.5 mm Always use cable finishings if possible.

(14 AWG).

3-3-3. AC power

Connect terminal L to the phase line of the AC power and terminal N to the zero line. See figure 3-8 for the power ground.

3-3-4. DC power

Connect terminal 1 to the positive outlet and terminal 2 to the negative outlet.

The size of conductors should be at least 1.25

. The overall cable diameter should be

between 7 & 12 mm.

POWER

12-24 V /10 W

FUSE: 2A/250 VAC/T

POWER

100-240 VAC/15 VA/ 50/60Hz FUSE: 500 mA/250 VAC/T

32 31 33 42 41 43 52 51 53 72 71 73

NC C NO NC C NO NC C NO NO C NC

S1 S2 S3CONTACTS S4

63 66 65 61 22 21 12 16 15

SHLD

-+-+

mA OUTPUTS

62 11 17

mA1

(+HART)

CONTACT SENSOR(S)

REFER TO INSTRUCTION MANUAL FOR CONNECTIONS ISC

Figure 3-7. Input and output connections

3-3-5. Grounding the housing

For the safety of the user and to protect the instrument against interference, the housing must always be connected to ground. This has to be done by a large area conductor. This cable can be fixed to the rear of the housing or by using the internal ground connections using a braided wire cable. See figure 3-8.

250V / 5A

AC / DC

100VA / 50W

(fail-safe)

TEMPmA2

RECEIVE DRIVESHLD

COILS

3-3-6. Switching on the instrument

After all connections are made and checked, the power can be switched on from the power supply. Make sure the LCD display comes on. After a brief interval, the display will change to the measured value. If errors are displayed or a valid measured value is not shown, consult the troubleshooting section (Chapter 8) before calling Yokogawa.

DANGER

The minimum cross sectional area of the protective grounding wire should be 0.75 mm

IM 12D06D05-01E

(M4 screw)

POWER

100-240 VAC/15 VA/ 50/60Hz

FUSE: 500 mA/250 VAC/T

(M4 screw)

Figure 3-8-a. External grounding Figure 3-8-b. Internal grounding

3 INSTALLATION AND WIRING

3-4. Wiring the contact signals 3-4-1. General precautions

The contact output signals consist of voltage-free relay contacts for switching electrical appliances (SPDT). They can also be used as digital outputs to signal processing equipment (such as a controller or PLC). It is possible to use multi-core cables for the contact in and output signals and shielded multi-core cable for the analog signals.

3-4-2. Contact outputs

The EXAxt 450 unit’s four contacts (switches) that can be wired and configured to suit user requirements. Contact S4 is programmed as a fail-safe contact. Please refer to section 5-7, Contact output setup for functionality description.

Alarm (limits monitoring)

Contacts configured as “ALARM” can be energized when limits are crossed.

Fail

Contacts configured as “FAIL” will be energized when a fail situation occurs. Some fail situations are automatically signaled by the internal diagnostics (electronics) of the converter. Others can be configured by the user (see section 5-11 Error Configuration). By pressing the “INFO” button on the main screen the user is given an explanation as well as a remedy for the current fail situation. Always connect the fail contact to an alarm device such as a warning light, alarm bell or displayed on an annunciator.

“ALARM” Contact “FAIL” Contact

Power Off NC NC

Power On NC NC

Alarm NO NC

Fail NC NO

Fail and Alarm NC* NO

HOLD NC NC

* When a fail situation occurs which is related

to the parameter associated with the contact (Conductivity, Concentration or temperature) the contact will go to NC. When the fail situation is not related to the parameter associated with the contact the contact will remain in the state it is currently in.

3-4-3. Contact input

It is necessary to use screening/shielding on the input signal cables. Terminal 63 is used to connect the shielding.

3-5. Wiring the mA-output signals 3-5-1. General precautions

The analog output signals of the EXAxt transmit low power standard industry signals to peripherals like control systems or strip-chart recorders (Figure 3-6).

3-5-2. Analog output signals

The output signals consist of active current signals of 4-20 mA. The maximum load can be 600 ohms on each.

IM 12D06D05-01E

It is necessary to use screening/shielding on the output signal cables. Terminal 63 is used to connect the shielding.

3-6. Wiring the sensor 3-6-1. General precautions

The sensor cable transmits low voltage, high frequency signals and should be installed separately from any high voltage, high cur rent and/or power switching cables. This is to avoid any unintentional cross talk or other kind of interference of the conductivity meas ure ment.

3-6-2. Connecting the sensor cable to the

converter

1. To access terminals remove the front cover of the EXAxt ISC450G by releasing the 4 captive screws.

2. Loosen the cable gland and pull the ca ble in the connection compartment.

3. The sensor leads are numbered and the leads must be connected to the ter mi nals with the corresponding number, re fer to Fig. 3-4: the temperature com pen sa tor with 11/12

- the drive coil with 15/16

- the receive coil with 13/17

Terminal 14 is for connection of the shield.

4. Screw the cable gland tight to en sure IP66 (NEMA 4X) environmental pro tec tion. An optional protection hose (flexible con duit) is available for additional me chan i cal protec tion of the sensor cable.

3-6-3. Installation of the sensor

The Model ISC40 is a “doughnut” shaped sensor. Preferably, the process will flow through the hole of the donut with the temperature compensator up-stream. For minimal obstruction of the flow and for accurate measurement without the need for calibration of the cell constant, the process will flow freely around the doughnut, allowing a minimum distance of 25 mm (1”) between doughnut and process piping (d). The sensor is provided with a gasket and retaining nut. This allows “bulkhead mounting” in tank wall or standard flange through a hole of 27 mm (1.1”) diameter (A). The insertion is 125 mm under the flange. Two flats are provided with wrench size 20 mm (0.8”) to allow easy mounting and alignment of the sensor. The model identification on one flat aligns with the “up-stream” position of the sensor.For On-line mounting adapters are available for standard 2” process connection (Gas thread, NPT, ANSI-flange, DIN-flange). For by-pass measurement flow fittings are available in polyporpylene, polyvinylidene flouride and Stainless Steel. For measurements in open ducts or vessels an immersion fitting in CPVC or Stainless Steel is available. For easy wiring the sensor must be located within 5 m (15”) from the converter using the integral sensor cabling.

Figure 3-9a. Dimensions

IM 12D06D05-01E

DIMENSIONS INSTALLATION INSTRUCTIONS

L= 5000 ( 200 )

YOKOGAWA

40 (1.57)

ca 240 (9.45)

100 (3.94)

47(1.85)

G3/4

thermistor

12 17

secondary

13 15

primary

ground

wrench opening 20 ( 0.79 )

wrench opening 32 ( 1.42 )

Ø 40 ( 1.57)

BULK-HEAD MOUNTING

UNIT: mm (inch)

Hole in flange Ø 27 mm (1.06")

d = distance min 25 mm (1") D = acces port size min 48 mm (1.89")

distance min. 25 mm (1) access port side min 48 mm (1.89)

3 INSTALLATION AND WIRING

Figure 3-9b. Dimensions

3-6-4. Sensor cable connections using junc-

tion box (BA10) and extension cable (WF10)

Where a convenient installation is not possible using the standard cables between sensors and converter, a junction box and extension cable may be used. The Yokogawa BA10 junction box

and the WF10 extension cable should be used. These items are manufactured to a very high standard and are necessary to ensure that the specifications of the system can be met. The total cable length should not exceed 60 metres (e.g. 5 m fixed cable and 55 m extension cable).

IM 12D06D05-01E

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