YOKOGAWA DT450G Series User Manual
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YOKOGAWA DT450G Series User Manual

Dust monitor
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User's
Manual
Model DT450G
Dust Monitor
IM 11K01C01-01E
IM 11K01C01-01E
5th Edition

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Summary of Contents for YOKOGAWA DT450G Series

  • Page 1 User’s Manual Model DT450G Dust Monitor IM 11K01C01-01E IM 11K01C01-01E 5th Edition...

  • Page 2: Introduction

    Read and completely understand before operating the equipment. Read before operating the equipment, and refer to it whenever necessary. Recommended to read at least once. Media No.IM 11K01C01-01E (YK) 5th Edition :July 2018 (YK) IM 11K01C01-01E All Rights Reserved Copyright © 2005, Yokogawa Electric Corporation...

  • Page 3: For The Safe Use Of This Equipment

    • Every effort has been made to ensure accuracy in the preparation of this manual. However, should any errors or omissions come to the attention of the user, please contact the nearest Yokogawa Electric representative or sales office. • This manual does not cover the special specifications. This manual may not be changed on any change of specification, construction and parts when the change does not affect the functions or performance of the product.
  • Page 4 <Introduction> NOTE This symbol indicates information that complements the present topic. This symbol indicates Protective Ground Terminal. This symbol indicates Function Ground Terminal. Do not use this terminal as the protective ground terminal. Special descriptions in this manual This manual indicates operation keys, displays and drawings on the product as follows: •...

  • Page 5: Notice

    Batteries are included in this product. Batteries incorporated into this product cannot be removed by yourself. Dispose them together with this product. When you dispose this product in the EU, contact your local Yokogawa Europe B.V.office. Do not dispose them as domestic household waste.

  • Page 6: After-Sales Warranty

    • Any damage from fire, earthquake, storms and floods, lightning, disturbances, riots, warfare, radiation and other natural changes. l Yokogawa does not warrant conformance with the specific application at the user site. Yokogawa will not bear direct/indirect responsibility for damage due to a specific application.
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  • Page 8: Table Of Contents

    <CONTENTS> Model DT450G Dust Monitor IM 11K01C01-01E 5th Edition CONTENTS Introduction ......................i For the safe use of this equipment ..............ii  NOTICE ......................... iv  After-Sales Warranty ................... v  Overview ....................1-1 1.1 Product Overview ..................... 1-1 1.2 Specifications ....................1-2 1.3 Model and Suffix Codes ...................
  • Page 9 <CONTENTS> 5.2 Replacing Parts ....................5-2 Troubleshooting ..................6-1 Customer Maintenance Parts List ........CMPL 11K01C01-01E Revision Information ....................i IM 11K01C01-01E...

  • Page 10: Overview

    <1.Overview> Overview This chapter discusses the following topics. · Product overview · Specifications · Model and suffix code · Dimensions 1.1 Product Overview Powder is used in many industries including ceramics, cement, chemicals, pharmaceutical and food. In their processes, powder is collected in order to reduce the loss incurred in the process. Dust emissions from industrial plants are limited by the air pollution control law, local regulations or other guidelines.

  • Page 11: Specifications

    <1. Overview> 1.2 Specifications Measurement objects: Solid particles in gas Particle size : 0.3 µm or greater Measurement range: 0.1 mg/m to 1 kg/m Measurement principle: Inductive Electrification Process conditions : Temperature : 250ºC or less Pressure : 200 kPa or less Gas flow rate : 4 m/s or greater (approx.
  • Page 12 <1.Overview> Air purge: Connection : Rc1/4 Air source : Clean, dry air equivalent to instrument air at process pressure +50 kPa Air consumption : approx. 50 Nl/min Mounting : Socket (dedicated) or flange Weight : Approx. 2.3 kg (excluding flange) Dimensions : 172 (W) x 173 (H) x 672 (D) mm IM 11K01C01-01E...

  • Page 13: Model And Suffix Codes

    <1. Overview> 1.3 Model and Suffix Codes Option Model Suffix Code Description Code DT450G - - - - - - - - - - - - - - - - - - - - - - - - - - Dust monitor (heat resistant up to 250º C Analog output -5 - - - - - - - - 4-20 mA DC analog output + fine adjustment for...

  • Page 14: Dimensions

    <1.Overview> Dimensions l Welding Socket Mounted Model Unit: mm Teflon coated (Option : /TC) Power Cable Inlet Output Signal Cable Inlet Rc1/4 (Ø5 to Ø10) Welding socket (Air Purge Piping Connection) (Ø5 to Ø10) Welding socket type.ai Duct wall Weld all around the socket; be careful not to deform the socket.
  • Page 15 <1. Overview> Flange Mounted Model Unit: mm (Insertion Length) Teflon coated (Option : /TC) Rc1/4 Power Cable inlet 4-Øh JIS 5K 65 FF (Example) (Air Purge Piping Connection) (Ø5 to Ø10) Output Signal Cable Inlet (Ø5 to Ø10) Flange Dimensions Unit: mm Class JIS 5K 65 FF...

  • Page 16: Instruction

    <2. Instruction> Instruction The DT450G is designed for indoor installation or installation in an outdoor location free from splashes of rainwater and direct sunlight. This chapter explains how to install the DT450G in the following order of topics. • Selection of installation location •...
  • Page 17 <2. Instruction> Minimal Vibration For reasons of sensor structure, avoid installing the DT450G in a location exposed to mechanical vibration at a level greater than 5 m/s Note: It is virtually impossible for vibration to affect the measured value. No Splashes of Rainwater, Direct Sunlight or Abnormal Temperature Rises due to Heat Radiation from Equipment The DT450G may be installed outdoors.
  • Page 18 <2. Instruction> Ease of Inspection and Maintenance The DT450G dust monitor must be detached for cleaning the sensor probe. For safe operation of these maintenance works, a sufficient maintenance space as shown below is required (See Figure 2.3). ≥ 1 m Duct 0.5 m 0.5 m...

  • Page 19: Machining Of Probe Inlet

    <2. Instruction> 2.2 Machining of Probe Inlet The DT450G is designed for mounting on a socket or flange attached to an inlet on a duct or other alternative facility. Equip the inlet with a socket or flange that complies with the specifications of the DT450G. At this point, make sure the DT450G’s casing and the duct are in electrical continuity.
  • Page 20 <2. Instruction> l When Mounting to Socket Prepare the DT450G with a flange that meets the specified standard. Prepare the tie-in flange at the connection port of the duct or pipe. Note that the standard sensor probe insertion length is 460 mm on the flange specification. Flange Duct Inner dia.

  • Page 21: Installing The Dt450G

    <2. Instruction> Installing the DT450G Securely fix the DT450G onto a socket or flange on the probe inlet. When fixing the DT450G onto a socket, use the supplied two M8-size bolts. When fixing the DT450G onto a flange, use bolts having a size that conforms to the flange specifications.

  • Page 22: Piping And Wiring

    <3. Piping and Wiring> Piping and Wiring Before operating the DT450G, the pipe for air purge and wires for output signals must be connected. This chapter explains how to connect the pipe and wires to DT450G in the following order of topics. •...

  • Page 23: Connecting The Pipe For Air Purge

    <3. Piping and Wiring> 3.1 Connecting the Pipe for Air Purge As a rule, the insulated part of the sensor probe should be air-purged before the DT450G is put into use. Air purge is mandatory if any of the following cases apply: • The concentration of dust in a gas is extremely high and the resistance of the insulated part of the sensor probe is likely to decrease due to dust accumulation.

  • Page 24: Connecting The Wires For The Power Supply

    <3. Piping and Wiring> 3.2 Connecting the Wires for the Power Supply CAUTION The DT450G has no power switch. For reasons of safety during inspection and maintenance, install a double-pole switch in the power line. CAUTION Since the DT450G may be removed for inspection or maintenance, allow each cable to have a sufficient margin of length.

  • Page 25: Connection Of Wires For The Output Signals

    <3. Piping and Wiring> Connection of Wires for the Output Signals This section discusses the wiring necessary to transmit analog output signals and alarm contact signals to each device. Wire the analog output and alarm contact signals of the DT450G using a single cable. Use a cable with an outside diameter of 5 to 10 mm, comprising three shielded twisted pair wires with the nominal cross-section of the conductor being not more than 0.5 mm If only the analog output signal is used and it is unlikely to be affected by noise (as the signal...

  • Page 26: Grounding The Duct

    <3. Piping and Wiring> Grounding the Duct CAUTION When such equipment as an electrostatic dust collector is used, be sure to ground both the duct and the DT450G. Otherwise, there may be a danger of electrical shock due to high potential static electricity.
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  • Page 28: Operation

    <4. Operation> Operation The ranges and other parameters of the DT450G must be configured before you start operation. This chapter explains how to operate the DT450G, including preparations, in the following order of topics. • Components and their functions • Preparation for operation •...

  • Page 29: Preparation For Operation

    <4. Operation> 4.2 Preparation for Operation Before you start operating the DT450G, carry out the following tasks. • Inspection of the state of installation • Supply of purge air • Supply of power • Parameter (Setting of measurement range. Setting of alarm points, Setting of damping action) 4.2.1 Inspection of the State of Installation...

  • Page 30: Setting Of Parameters

    <4. Operation> 4.2.4 Setting of Parameters The dust monitor has a 4-20 mA output and two relay contact alarm outputs. The effect of sudden change of measured value can be removed by setting a user configurable time constant. The output current of the 4-20 mA signal can be trimmed. The relay output (s) change their state when the measured dust concentration exceeds a user selected alarm trigger level.
  • Page 31 <4. Operation> Setting Alarm Contacts Press the leftmost (A) key until the leftmost digit shows “1” or “2”. Set the alarm contact of relay 1 or 2 in percent of the output full scale value. Each press of the middle (B) or the rightmost (C) key only increases the number, which will roll back to 1% after it reaches 99%.
  • Page 32 <4. Operation> The set point of 20% means that the 4-20 mA output at the typical dust concentration will be 4 mA + (20 mA - 4 mA)  20% which makes 7.2 mA. If the dust concentration is five times the typical value or higher, the output will be 20 mA, and if the dust concentration is zero, the output will be 4 Next, the measuring range should be set.

  • Page 33: Steady-State Operation

    <4. Operation> Steady-state Operation Proceed to steady-state operation after making sure there is no problem with the DT450G during start-up. Before going into steady-state operation, make sure the cover is securely attached to the DT450G main unit. Moisture or corrosive gas entering into the DT450G may result in malfunction. This section discusses the following topics concerning the handling of the DT450G during steady-state operation.

  • Page 34: Inspection And Maintenance

    <5. Inspection and Maintenance> Inspection and Maintenance WARNING If the DT450G is installed in the downstream of an electrostatic dust collector, there is a danger of serious injury or death from electric shock due to high-potential static electricity. Carry out maintenance without disconnecting the grounding line that was connected when the DT450G was installed.

  • Page 35: Periodic Maintenance

    Note: O-rings are also used in the DT450G main unit and on the contact surfaces of the sensor probe, though they are not visible from outside. Ask Yokogawa Electric Corporation for replacement of these O-rings. IM 11K01C01-01E...
  • Page 36 Then, examine the wiring connections and check if the fuse has blown. Consult Yokogawa if the fuse has blown. • There is something wrong with the electric • Request repair to be carried out by circuit components.
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  • Page 38 JPI Class 150-2 1/2 RF K9479DD ANSI Class 150-2 1/2 RF K9479CA Socket L9800TC Bolt DT450G for CMPL.eps CMPL 11K01C01-01E All Rights Reserved, Copyright © 2005, Yokogawa Electric Corporation. Subject to change without notice. 2nd Edition : Feb. 2012 (YG) Yokogawa Electric Corporation...
  • Page 40 Revision Information Title: Model DT450G Dust Monitor Manual No.: IM 11K01C01-01E Edition Date Remark (s) Jul. 2018 Revised and Corrected overall Modified specification Jun. 2012 Revised and Corrected over all 1.3.2 “Spare Parts”: Deleted the “Note”. Apr. 2012 “Specification” Seiup level: Deleted of the description; 1.3.1 “Dust Monitor”...
  • Page 41 Blank Page n If you want have more information about Yokogawa products, you can visit Yokogawa’s home page at the following website. Home page: http://www.yokogawa.com/an/ n Written by Environmental & Analytical Products PMK Dept. IA Div., Product Business Center Yokogawa Electric Corporation...

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