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Doc. no. : HTML-S_Kor_2016, Rev. 0

 

Issued date : 2016. 11

 

HITROL Co., Ltd 

 

Table of Contents 

 

 

1.

 

Introduction

    …………………………………………………………………………………………...... 3 

 

2.

 

Operating Principles

 ….....……………………………………………….…………………..……… 3

 

 

3.

 

Specification

 ……………………………………………………………………………………………… 3 

 

4.

 

Terms and Definitions 

……………………………………………………………………………….. 4 

 

5.

 

Composition

 ………………………………………………………………………………………………. 5 

 

6.

 

Testing Instruments

 …………………………………………………………………………………… 5 

 

7.

 

Wiring for Functional Test

 ………………………………………………………………………… 5 

 

8.

 

Checkpoints for Functional Test

 ……………………………………………………………… 6 

 

9.

 

Procedures for Functional Test

 ………………………………………………………………… 7 

 

10.

 

  Precautions

    …………………………………………………………………………………………… 8 

 

11.

 

 

Installation method 

  ……………………………………………………………………………… 9 

 

12.

 

  Appendix

    ……………………………………………………………………………………………… 10 

 

Summary of Contents for HTML-S

Page 1: ...11 HITROL Co Ltd HITROL CO LTD HEAD OFFICE FACTORY R D INSTITUDE HITROL CO LTD 141 Palhakgol gil Jori eup Paju si Gyeonggi do Korea TEL 00 82 31 950 9700 FAX 00 82 31 950 9796 9799 www hitrol com INSTRUCTION MANUAL Thermal Dispersion Type Level Switch HTML S ...

Page 2: ...nts 1 Introduction 3 2 Operating Principles 3 3 Specification 3 4 Terms and Definitions 4 5 Composition 5 6 Testing Instruments 5 7 Wiring for Functional Test 5 8 Checkpoints for Functional Test 6 9 Procedures for Functional Test 7 10 Precautions 8 11 Installation method 9 12 Appendix 10 ...

Page 3: ... the temperature of the active RTD changes because the caloric value of the heater is transferred to the measured fluid through the area where the level element contacts the measured fluid At this time T the difference in the measured temperatures between the reference RTD and the active RTD is formed Then the level transmitter determines if fluid is detected based on the R of the RTD sensors with...

Page 4: ...ntact point of the relay 4 4 Sensors Sensors are core parts of the L E and are categorized into active sensors Sa and reference sensors Sr 4 5 Sa and Sr Sa and Sr refer to active sensor and reference sensor respectively They are sensors for measuring temperature of heaters and air respectively 4 5 Ra and Rr They refer to resistance values of Sa and Sr respectively 4 6 ΔR This refers to the differe...

Page 5: ... comprises two boards a power board and a relay board 5 2 1 Power Board This board supplies power to the boards at constant voltages and at constant currents 5 2 2 Relay Board This board outputs signals of calculated data to the contact point of the relay The stand alone type comprises the L E and the L T as separated from each other with the following details 5 3 The L E details are the same as t...

Page 6: ...the heater 1 RA 1 000 Ω 0 3 76 Ω e g 20 1 075 2 Ω 1 2 RR 1 000 Ω 0 3 76 Ω e g 20 1 075 2 Ω 1 3 Heater 220 Ω 1 8 3 2 Check the output current of the heater Apply power to the L T warm up 20 minutes and measure the output current at the power supply terminal for checking that it is 75 mA 1 Use of variable resistor R2 If the current is beyond the range adjust it by using R2 8 4 Check voltage at the T...

Page 7: ...t the procedures of 8 4 again 9 5 Set the Active and the Reference resistance values of the Decade box at 1 040 Ω and 1 000 Ω respectively and check that the green LED is changed to red If the LED is not changed into red you must repeat the procedures of 8 4 again 9 6 If the measurement subject is not detected the green LED will be turned on and the terminals B1 and C1 as well as B2 and C2 of the ...

Page 8: ...ake care in wiring because miss wiring may lead to malfunction of the instrument 10 2 3 Check the wired cables at regular intervals 10 2 4 Wiring should be carried out by a qualified person 10 2 5 Use the terminal lugs supplied by HITROL 10 3 Precautions for installation 10 3 1 When flanges or screws are used for fastening the size should be the same 10 3 2 The user should place a washer between e...

Page 9: ...HTML S 11 1 1 Check the flow direction before inserting the product into the user nozzle 11 1 2 Check the flow direction and insert it into the user nozzle See Figures below 11 1 3 After inserting the product fasten bolts and nuts 11 1 4 In case of separation perform the above method in reverse order Figure1 Figure2 Figure3 ...

Page 10: ...Page 10 10 Doc no HTML S_Kor_2016 Rev 0 Issued date 2016 11 HITROL Co Ltd 12 Appendix ...

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