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D-2 Incorporated JF-1A Скачать руководство пользователя страница 19

JF-1A Conductivity Sensor

A440-010

December, 2005

19

TERMINAL Function

1

Data/Power Ground

2

RS-232 Data In (RXD)

3

Power Input +

4

RS-232 Data Out (TXD)

The RS-232 Interface is fully isolated from the sensor electronics through the

use of optical isolators located in the JF-1A/ATEX sensor.

Data cable for the RS-232 should be low capacitance data cable. Lengths in

excess of 20 meters may result data degradation of the RS-232 signals.

4.9 Power Input (4-Wire)

WARNING

: Power supply must be fully isolated and meet all local and site

codes for its use.

Power input to the 4-Wire power connections should be clean filtered DC

voltage in the range of 7 – 35 VDC. Current consumption is approximately 10
mA.

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Содержание JF-1A

Страница 1: ...use aspects of the D 2 JF 1A Conductivity Sensor D 2 continuously strives to meet the full expectations of our customers and we welcome comments on the structure content and the ability of this manual...

Страница 2: ...this manual is subject to change without notice and does not represent a commitment on the part of D 2 Incorporated No part of this manual may be reproduced or transmitted in any form or by any means...

Страница 3: ...ANT Notes on working procedures Revision History Rev Date Description 12 19 05 Written AJF 1 12 23 05 Add Fuel Temperature Pressure Limits Add Safety Ground Wire Connections 2 Wire 4 Wire Diagrams Des...

Страница 4: ...NT IDENTIFICATION 8 4 0 SENSOR INSTALLATION ASSEMBLING DISMATLING 9 5 0 SENSOR REMOVAL 20 6 0 SPECIFICATIONS MAXIMUM ALLOWABLE VALUES 22 7 0 MAINTENANCE 24 8 0 ADJUSTMENT 25 9 0 DETAILS TO ALLOW SAFE...

Страница 5: ...guidelines ATTENTION The sensor is not designed to meter gaseous media or solids Manufacturer D 2 Incorporated 21A Commerce Park Road Pocasset MA 02559 USA Type II 2G Code EEx d ia IIC T4 Testing Stat...

Страница 6: ...talled in a filled product line do not energize sensor When using the sensor to measure combustible media observe the regulations concerning transport and storage of combustible liquids Observe applic...

Страница 7: ...sembly of the JF 1A Sensor with parts not tested and approved by D 2 Incorporated is prohibited and can result in damage to persons and property for which no liability will be accepted Caution Install...

Страница 8: ...ION Figure 2 Major System Components 1 Ball Valve 2 Sensor Mount Adaptor 3 Mounting Nut 4 Locking Collar 6 Electronics Housing 7 Electrical Connection Side 8 Label 9 Installation Reference Plane 1 2 3...

Страница 9: ...o reduce the potential for electrostatic discharge should be observed prior to handling the JF 1 Sensor Ensure service personnel have proper grounding equipment 4 2 PIPE CONNECTIONS D 2 recommends a 3...

Страница 10: ...g mechanism counter clockwise to loosen sleeve Push sleeve down as far as possible on shaft IMPORTANT Prior to nut installation step 2 onto sensor adaptor ensure threads are coated with a good quality...

Страница 11: ...ball valve handle 1 4 turn to open 5 Turn black locking mechanism counter clockwise to loosen shaft WARNING Do not rotate the main body electronics housing other than in a clockwise direction to assi...

Страница 12: ...nsure entry into main product line is clear and free of obstructions 6 Push sensor down into product line 7 Adjust sensor height see section 4 5 for high flow conditions 8 Turn black locking mechanism...

Страница 13: ...ould be mounted well away from possible sources of electromagnetic noise such as large pump motors AC power Lines or electrical circuits containing large transient switching currents WARNING Prior to...

Страница 14: ...lines as lines in which the velocity of product exceeds 1 5M sec 5 ft sec Velocity can be determine by dividing the cross sectional area of your pipe I D 2 2 3 14 dived into your product flow rate in...

Страница 15: ...erminal blocks can not be used for this earth connection Electrical connection details are shown in figure A There are 2 screw terminal blocks the terminal block with 4 positions has the 4 wire interf...

Страница 16: ...sistent with the Open Circuit Supply needs of the JF 1A at both its minimum and maximum indicating currents The JF 1A has both input voltage limiting protection and polarity protection These protectio...

Страница 17: ...t output may occur D 2 recommends that a 24 VDC isolated supply be used to power the instrumentation loop The supply should have high isolation 500 Mohm The current loop should be wired using shielded...

Страница 18: ...iring compartment A cable lug shall be used and the conductor shall be mounted so that it is secured against loosening and twisting and that the contact pressure is permanently maintained Note the con...

Страница 19: ...nsor Data cable for the RS 232 should be low capacitance data cable Lengths in excess of 20 meters may result data degradation of the RS 232 signals 4 9 Power Input 4 Wire WARNING Power supply must be...

Страница 20: ...t blow back WARNING At no time during removal of the sensor should the main body electronics housing of the sensor be rotated in a continuous counter clockwise direction Any such rotation may result i...

Страница 21: ...TRACTED SENSOR minimum length necessary to ensure probe has been withdrawn completely from valve 4 3 2 1 28 5 3 CLOSE BALL VALVE Close the ball valve and loosen the locking nut which secures the senso...

Страница 22: ...ility limits are as follows Table 2 SENSOR SPECIFICATIONS SENSORS Parameter Conductivity Temperature Range 0 500 pS M 5 50 C Accuracy 2 pS M 2 of Reading 0 5 C Resolution 0 1 pS M 0 1 C Sensor Type Co...

Страница 23: ...sage Class 1 Division 2 ATEX Certification Type II 2G EExd ia IIC T4 FM Certification Pending UL Certification Pending CONDUCTIVITY READINGS The following table details current output readings for the...

Страница 24: ...rformance 7 3 Sensor The main electronics housing is sealed to the environment The housing is purged prior to sealing with dry nitrogen after drying If the housing is opened the unit must be returned...

Страница 25: ...SE AS INTENDED See Section 2 0 of this manual 10 0 SPECIAL CONDITIONS OF USE The JF 1A Sensor is intended for the measure of electrical conductivity of liquids only It is not intended for any other pu...

Страница 26: ...snap out Molex screw terminals which can be removed to assist in wiring Cabling used should be in compliance with the JF 1A Ex examination certificate The 2 wire temperature interface is polarity ins...

Страница 27: ...and that the contact pressure is permanently maintained Note the connections to earth located on the terminal blocks can not be used for this earth connection The maximum loop power supply voltage un...

Страница 28: ...60 Celsius range representing 4 20 mA Please consult the factory for alternate range settings of the current output Temperature C Current mA Voltage Volts 10 0 4 0 1 00 0 0 6 3 1 57 10 0 8 6 2 14 20...

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