DURAG D-R 290 User manual

Operating Manual
D-R 290
Dust Concentration and
Opacity Monitor of the Second
Generation
GmbH • Kollaustraße 105 • 22453 Hamburg • Germany • www.durag.com
Before starting any work please read the operating
manual!
Article no.:
4 009 352

Version: 10009568-11-03 Previous version: 10009568-10-03
Production date: 18/07/2016
Volume: 202
Operating manual Dust and Opacity Monitor D‑R 290
DURAG GmbH
Kollaustraße 105
22453 Hamburg
Germany
Telephone:
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www.durag.com
This manual...
●always relates to the complete device, even if individual program modules or parts have not been purchased.
●or parts thereof may not be reproduced or distributed without express permission from DURAG GmbH, irre
spective of how this is done, in what language or by what medium, electronic or mechanical.
●relates to the current design of the device at the time of this documentation being updated (see page 2 above
for production date).
●contains figures which may differ due to further technical developments or to the manageable scale of their
actual appearance. No claims regarding the supply of identical products can therefore be derived from the il
lustrations shown.

Contents
D-R 290 3
Contents
1General 13
1.1 Information on this manual.............................................................................................................. 13
1.2 Explanation of symbols.................................................................................................................... 14
1.3 Limitation of liability......................................................................................................................... 15
1.4 Instructions regarding warranty....................................................................................................... 16
1.5 Spare parts...................................................................................................................................... 16
1.6 Customer service............................................................................................................................. 16
1.7 Copyright ........................................................................................................................................ 16
1.8 Trademarks..................................................................................................................................... 17
2Safety 21
2.1 General safety instructions.............................................................................................................. 21
2.2 Designated use................................................................................................................................ 22
2.3 Responsibility of the operating company......................................................................................... 22
2.4 Personnel........................................................................................................................................ 22
2.4.1 Personnel, skills............................................................................................................................... 22
2.4.2 Unauthorised personnel.................................................................................................................. 23
2.5 Personal protective equipment........................................................................................................ 24
2.6 Basic hazards.................................................................................................................................. 24
2.6.1 Hazards due to electrical equipment............................................................................................... 24
2.6.2 Hazard due to hot, aggressive or explosive gases or high pressure of the measuring gas............ 25
2.6.3 Hazard due to automatic closing mechanisms................................................................................ 25
2.6.4 Avoidance of consequential damage in the event of a system fault................................................ 26
2.7 Device-specific hazards and safety measures................................................................................ 26
2.7.1 Hazard to the device due to purge air failure................................................................................... 26
2.8 Description and location of safety equipment and emergency stop mechanisms........................... 27
3Delivery 31
3.1 Delivery information......................................................................................................................... 31
3.2 Transportation, packaging and storage........................................................................................... 31
3.2.1 Safety instructions for transport....................................................................................................... 31
3.2.2 Incorrect transport........................................................................................................................... 31
3.2.3 Transport inspection........................................................................................................................ 31
3.2.4 Packaging........................................................................................................................................ 32
3.2.5 Storage conditions........................................................................................................................... 32
3.3 Scope of supply............................................................................................................................... 33
3.3.1 Standard scope of supply................................................................................................................ 33
3.3.2 Optional equipment......................................................................................................................... 34
3.3.3 Reflectors........................................................................................................................................ 36
3.3.4 Optional version variants................................................................................................................. 37
4Product description 41
4.1 Fundamental features...................................................................................................................... 41
4.2 Device and Function description..................................................................................................... 41
4.2.1 Principle of operation....................................................................................................................... 42
4.2.2 Measurement principle.................................................................................................................... 45
4.2.3 Transmission................................................................................................................................... 46
4.2.4 Opacity............................................................................................................................................ 46
4.2.5 Calculation of the opacity at the flue stack opening........................................................................ 46
4.2.6 Optical density (extinction).............................................................................................................. 48
4.2.7 Calculation of the dust concentration.............................................................................................. 48

Contents
4D-R 290
4.3 System components........................................................................................................................ 50
4.3.1 Possible system configurations....................................................................................................... 51
4.4 Applications, Designated use.......................................................................................................... 53
4.5 Conformity/approval........................................................................................................................ 54
4.6 Designation of device components for the D-R 290........................................................................ 54
4.7 Identification of the product............................................................................................................. 57
4.7.1 Information about the type label...................................................................................................... 59
5Installation 63
5.1 Safety.............................................................................................................................................. 63
5.1.1 Transport to the place of installation................................................................................................ 64
5.1.2 Skill levels of personnel for installation and commissioning............................................................ 64
5.2 Preparation for installation............................................................................................................... 64
5.2.1 Preconditions for operation.............................................................................................................. 66
5.2.2 Instructions for planning the electrical connections to the system................................................... 66
5.2.3 Instructions for selection the device variant and measuring point................................................... 67
5.2.4 Free space around the device housing........................................................................................... 69
5.3 System installation sequence :........................................................................................................ 69
5.4 Installation of the D−R 290 measuring head and reflector ............................................................. 70
5.4.1 Standard installation of the welded-in pipes with adjustment flanges............................................. 70
5.4.2 Installation variants.......................................................................................................................... 73
5.4.3 Alignment of the tube stubs............................................................................................................. 76
5.4.4 Installation of the measuring head and reflector.............................................................................. 76
5.4.5 Electrical connections to the measuring head................................................................................. 79
5.4.6 Meaning of the LEDs....................................................................................................................... 80
5.4.7 Configuration of the relay outputs.................................................................................................... 81
5.5 Installation of the D-SK 290 protective device ................................................................................ 83
5.5.1 Installation sequence for the measuring head and reflector (when the D-SK 290 protective device is
used)................................................................................................................................................ 84
5.5.2 Display LEDs of the control electronics........................................................................................... 87
5.5.3 Installation protective device D-SK 290........................................................................................... 87
5.5.4 D-SK AE electrical connection......................................................................................................... 88
5.5.5 Configuring the protective device.................................................................................................... 92
5.5.6 Checking the protective device........................................................................................................ 92
5.5.7 Commissioning the D-SK AE........................................................................................................... 93
5.6 Installation of the D-ISC 100 control unit......................................................................................... 96
5.6.1 Connecting the supply and control unit........................................................................................... 96
5.7 Installation of the supply unit........................................................................................................... 97
5.7.1 Installation of the D-TB 100 supply unit........................................................................................... 97
5.7.2 Electrical connection to the D-TB 100 supply unit........................................................................... 98
5.8 Installation of the purge air unit..................................................................................................... 101
5.8.1 Selection of an installation location of the purge air unit (blower)................................................. 101
5.8.2 Arrangement and installation of the purge air unit......................................................................... 101
5.8.3 Electrical installation of the purge air unit...................................................................................... 102
5.8.4 Electrical connection for the purge air motor................................................................................. 102
5.9 Active operation............................................................................................................................. 103
5.10 Dismantling and disposal............................................................................................................... 103
5.10.1 Dismantling.................................................................................................................................... 103
5.10.2 Disposal of the Dust Concentration and Opacity Monitor.............................................................. 104
5.10.3 RoHS compliance.......................................................................................................................... 104
6Commissioning 107
6.1 Optical alignment........................................................................................................................... 107

Contents
D-R 290 5
6.2 Parameterisation and operation of the measuring head................................................................ 108
6.3 Navigation help for D-ESI 100 settings path.................................................................................. 109
6.4 Information on the DURAG Modbus protocol................................................................................ 110
6.4.1 Basic Modbus information............................................................................................................. 110
6.5 Example: Save parameters........................................................................................................... 110
6.6 Using the PIN lock (PIN code)....................................................................................................... 111
6.6.1 PIN symbol overview..................................................................................................................... 111
6.6.2 Example: Login.............................................................................................................................. 112
6.6.3 Example: Change PIN code.......................................................................................................... 113
6.6.4 Example: Logout............................................................................................................................ 114
6.6.5 Example: Deactivate the PIN lock................................................................................................. 115
6.7 Parameter checking or setting overview........................................................................................ 116
7Checking / setting parameters with D‑ESI 100 119
7.1 D−ESI 100 help function................................................................................................................ 119
7.2 Example: Settings for checking / synchronising: Date and time.................................................... 120
7.3 Example: Setting – DURAG – Modbus address............................................................................ 121
7.4 Example: Baud rate settings.......................................................................................................... 122
7.5 Example: Setting variables for the measurement channels (channel #1)… (channel #4)............. 125
7.5.1 Limit values (channel #1)… (channel #4)...................................................................................... 126
7.5.2 Type code...................................................................................................................................... 127
7.5.2.1 Available type codes for the D-R 290............................................................................................ 128
7.5.3 Example: Settings for the measured value correction................................................................... 129
7.5.3.1 Principle of measured value correction......................................................................................... 130
7.5.3.2 Integration time.............................................................................................................................. 131
7.5.3.3 Offset a0........................................................................................................................................ 131
7.5.3.4 Slope a1, a2, a3............................................................................................................................ 132
7.5.3.5 Signal range.................................................................................................................................. 133
7.5.3.6 Settings.......................................................................................................................................... 133
7.5.3.7 Zero range..................................................................................................................................... 133
7.6 Example: Assignment of the device outputs ................................................................................. 134
7.6.1 Current output................................................................................................................................ 134
7.6.2 Relay settings................................................................................................................................ 135
7.6.3 Relay logic..................................................................................................................................... 137
7.7 Maintenance setup........................................................................................................................ 139
7.7.1 Reference point check setpoint..................................................................................................... 140
7.7.2 Control cycle step duration and control cycle interval................................................................... 140
7.7.3 Fault indication suppression.......................................................................................................... 141
7.7.4 Device configuration...................................................................................................................... 141
7.7.5 Measured values........................................................................................................................... 142
7.7.6 Settings.......................................................................................................................................... 142
7.7.7 Device status:................................................................................................................................ 143
7.7.8 Calibration on the dust-free measuring path................................................................................. 146
7.7.9 Measurement tube for a dust-free measurement path.................................................................. 148
7.7.10 Temperature compensation........................................................................................................... 149
7.7.10.1 Temperature and pressure compensation using the device parameters...................................... 149
7.7.10.2 Temperature compensation via an external temperature transmitter (special variant)................. 149
8Maintenance 153
8.1 Safety............................................................................................................................................ 153
8.2 Maintenance work......................................................................................................................... 154
8.2.1 Visual inspection and cleaning of external parts of the device...................................................... 156
8.2.2 Check the purge air unit and the hose connections for leaks and secure fitting........................... 156

List of figures
6D-R 290
8.2.3 Checking and changing the filter................................................................................................... 156
8.2.4 Cleaning the outer glass and the zero-point reflector:................................................................... 157
8.2.5 Removing deposits from the welded-in pipes................................................................................ 158
8.2.6 Checking the linearity.................................................................................................................... 158
8.2.7 Zero point check............................................................................................................................ 161
8.2.8 Contamination check..................................................................................................................... 161
8.2.9 Reference point check................................................................................................................... 162
8.2.10 Control cycle.................................................................................................................................. 162
8.2.11 Functional test of the fail-safe shutter............................................................................................ 163
8.2.12 Checking the battery in the measuring head................................................................................. 164
8.3 Error messages / troubleshooting.................................................................................................. 167
9Appendix 177
9.1 Measurement point questionnaire................................................................................................. 177
9.2 D-R 290 technical data ................................................................................................................. 179
9.2.1 D-R 290 application data............................................................................................................... 179
9.2.2 D-R 290 measuring head and reflector......................................................................................... 179
9.2.3 D-SK AE control electronics protective device.............................................................................. 180
9.2.4 D-SK 290 MA fail-safe shutter protective device........................................................................... 180
9.2.5 D-TB 100 supply unit (terminal box).............................................................................................. 181
9.2.6 D-BL XXX purge air unit ............................................................................................................... 181
9.3 Dimensional diagrams................................................................................................................... 182
9.3.1 Dimensional diagram of the measuring head/reflector.................................................................. 182
9.3.2 Dimensional diagram of the measuring head/reflector with fail-safe shutter................................. 184
9.3.3 Dimensional diagram of the welded-in pipe with adjustment flange.............................................. 185
9.3.4 Dimensional diagram of the control electronics D-SK AE............................................................. 186
9.3.5 Dimensional diagram fail-safe shutter D-SK MA........................................................................... 187
9.3.6 Dimensional diagram supply unit (terminal box) D-TB 100........................................................... 187
9.3.7 Dimensional diagram purge air unit D-BL...................................................................................... 188
9.3.8 Dimensional diagram (optional) weather protection covers........................................................... 191
10 Glossary 195
11 Index 197
List of figures
Fig. 4.1 System components..................................................................................................................... 42
Fig. 4.2 Measurement............................................................................................................................... 43
Fig. 4.3 Turntable plate............................................................................................................................. 43
Fig. 4.4 Comparison measurement........................................................................................................... 43
Fig. 4.5 Zero point measurement.............................................................................................................. 44
Fig. 4.6 Reference point measurement..................................................................................................... 45
Fig. 4.7 Measurement principle................................................................................................................. 45
Fig. 4.8 Relationship between extinction, transmission and opacity......................................................... 46
Fig. 4.9 Reference points for determination of the opacity........................................................................ 47
Fig. 4.10 System components..................................................................................................................... 50
Fig. 4.11 Dimensional diagram D−R 290 standard welded-in pipe with adjustment flange (↘= red dot).... 52
Fig. 4.12 type label...................................................................................................................................... 59
Fig. 5.1 System layout (example).............................................................................................................. 65
Fig. 5.2 Measuring point............................................................................................................................ 68

List of figures
D-R 290 7
Fig. 5.3 Installation example on a horizontal duct..................................................................................... 69
Fig. 5.4 Standard welded-in pipe with adjustment flange.......................................................................... 71
Fig. 5.5 Standard installation of a welded-in pipe with adjustment flange................................................. 72
Fig. 5.6 Installation of a welded-in pipe with adjustment flange in a brick stack....................................... 73
Fig. 5.7 Installation of a welded-in pipe with adjustment flange on a gusset plate.................................... 74
Fig. 5.8 Installation of a welded-in pipe with adjustment flange in a double-walled flue........................... 75
Fig. 5.9 Alignment of the tube stubs.......................................................................................................... 76
Fig. 5.10 Installation at the adjustment flange, dimensional diagram D−R 290.......................................... 78
Fig. 5.11 Adjustable attachment.................................................................................................................. 79
Fig. 5.12 Connection plugs and sockets on the underside of the housing.................................................. 80
Fig. 5.13 (LEDs in the measuring head)...................................................................................................... 81
Fig. 5.14 Attachment screws for thehousing cover..................................................................................... 82
Fig. 5.15 Undo............................................................................................................................................. 82
Fig. 5.16 Position of the switches SW1 and 2 in the measuring head........................................................ 82
Fig. 5.17 Tightening..................................................................................................................................... 83
Fig. 5.18 Installation at the adjustment flange, dimensional diagram D−R 290.......................................... 85
Fig. 5.19 Adjustable attachment.................................................................................................................. 86
Fig. 5.20 Control electronics displays.......................................................................................................... 87
Fig. 5.21 Air flow sensor.............................................................................................................................. 88
Fig. 5.22 Electrical connection to the D-SK AE........................................................................................... 89
Fig. 5.23 Connection of the fail-safe shutter to the 8-core plug cable of the measuring head.................... 91
Fig. 5.24 Control electronics front panel...................................................................................................... 93
Fig. 5.25 LED control electronics................................................................................................................ 94
Fig. 5.26 D‑SK AE control electronics......................................................................................................... 95
Fig. 5.27 Shutter motor................................................................................................................................ 95
Fig. 5.28 Connecting the D−R 290 as an individual sensor to the D‑TB 100 supply unit............................ 96
Fig. 5.29 Connecting the D−R 290 as an individual sensor directly to the D‑ISC 100 control unit.............. 96
Fig. 5.30 Supplying the D−R 290 via a D-TB 100 and connection of a D‑ISC 100 via DURAG Bus.......... 97
Fig. 5.31 Supply unit cover assembly.......................................................................................................... 98
Fig. 5.32 Attaching the retaining plates....................................................................................................... 98
Fig. 5.33 Connecting the cable screen........................................................................................................ 99
Fig. 5.34 Connecting the cable.................................................................................................................... 100
Fig. 5.35 D-TB 100 terminal box connection diagram................................................................................. 100
Fig. 5.36 Junction box................................................................................................................................. 102
Fig. 5.37 Electrical connection for the purge air motor................................................................................ 102
Fig. 6.1 Sighting mechanism..................................................................................................................... 108
Fig. 6.2 Optical alignment.......................................................................................................................... 108
Fig. 6.3 Device list..................................................................................................................................... 109
Fig. 6.4 PIN lock deactivated..................................................................................................................... 111
Fig. 6.5 Login box...................................................................................................................................... 112
Fig. 6.6 D-ESI 100 device overview page after login................................................................................ 113
Fig. 6.7 D-ESI 100 device overview page after login................................................................................ 113
Fig. 6.8 Change PIN Code box................................................................................................................. 114
Fig. 6.9 End device locked with a PIN code.............................................................................................. 114
Fig. 6.10 Deactivate the PIN code............................................................................................................... 115
Fig. 6.11 PIN Code changed successfully................................................................................................... 115
Fig. 6.12 PIN lock deactivated..................................................................................................................... 116
Fig. 6.13 Change PIN code failed............................................................................................................... 116
Fig. 7.1 Info about D−ESI 100................................................................................................................... 119
Fig. 7.2 Setting the date/time.................................................................................................................... 120

List of figures
8D-R 290
Fig. 7.3 Setting DURAG − Modbus address.............................................................................................. 121
Fig. 7.4 Setting DURAG – Modbus communication settings .................................................................... 123
Fig. 7.5 Setting variables for the measurement channels......................................................................... 125
Fig. 7.6 Common parameters D‑R 290 Variables setting I........................................................................ 131
Fig. 7.7 Diagram: Measured value correction by polynomial (example)................................................... 132
Fig. 7.8 Common parameters D‑R 290 Variables setting II....................................................................... 133
Fig. 7.9 Setting the analogue output......................................................................................................... 134
Fig. 7.10 Setting relay setup........................................................................................................................ 136
Fig. 7.11 Setting the relay settings.............................................................................................................. 138
Fig. 7.12 Setting the maintenance settings................................................................................................. 139
Fig. 7.13 Device configuration..................................................................................................................... 141
Fig. 7.14 Measured values.......................................................................................................................... 142
Fig. 7.15 Calibration.................................................................................................................................... 143
Fig. 7.16 Device status................................................................................................................................ 144
Fig. 7.17 Pin assignment or the purge air monitoring plug.......................................................................... 145
Fig. 7.18 Connection plugs and sockets on the underside of the housing.................................................. 145
Fig. 7.19 Quick Info explanation of the shutter status................................................................................. 145
Fig. 7.20 Dust-free measurement................................................................................................................ 147
Fig. 7.21 Diaphragm.................................................................................................................................... 148
Fig. 7.22 Measurement tube for a smoke-free measurement path............................................................. 148
Fig. 7.23 Temperaturetransmitter................................................................................................................ 149
Fig. 7.24 Pin assignmentconnection , temperature transmitter................................................................... 150
Fig. 7.25 Electrical connection of a 2-wire transducer (without its own power supply)............................... 150
Fig. 7.26 Electrical connection of a 4-wire-transducer (with its own power supply).................................... 150
Fig. 8.1 Purge air filter............................................................................................................................... 156
Fig. 8.2 Optical surfaces............................................................................................................................ 157
Fig. 8.3 EPA-Test filter.............................................................................................................................. 158
Fig. 8.4 Insert the test filter into the device................................................................................................ 159
Fig. 8.5 Example of a linearity test without scaling.................................................................................... 160
Fig. 8.6 Example of a linearity test with scaling......................................................................................... 161
Fig. 8.7 Turntable plate............................................................................................................................. 162
Fig. 8.8 LED 5........................................................................................................................................... 164
Fig. 8.9 Attachment screws for thehousing cover..................................................................................... 164
Fig. 8.10 Undo............................................................................................................................................. 165
Fig. 8.11 Changing the battery.................................................................................................................... 165
Fig. 8.12 Tightening..................................................................................................................................... 166
Fig. 9.1 Measurement point questionnaire 1............................................................................................. 177
Fig. 9.2 Measurement point questionnaire 2............................................................................................. 178
Fig. 9.3 Dimensional diagram of the measuring head/reflector................................................................. 182
Fig. 9.4 Installation example on a horizontal duct..................................................................................... 183
Fig. 9.5 Dimensional diagram of the measuring head/reflector with fail-safe shutter................................ 184
Fig. 9.6 Installation example on a horizontal duct..................................................................................... 185
Fig. 9.7 Dimensional diagram D−R 290 standard welded-in pipe with adjustment flange (↘= red dot).... 185
Fig. 9.8 Housing D-SK AE dimensional diagram, space required............................................................. 186
Fig. 9.9 Dimensional diagram housing D-SK 290 MA *D1 diameter 100 mm .......................................... 187
Fig. 9.10 Dimensional diagram housing D-SK 280 MA *D1 diameter 150 mm .......................................... 187
Fig. 9.11 Dimensional diagram D-TB 100 supply unit................................................................................. 188
Fig. 9.12 Dimensional diagram purge air unit *D1 diameter 100 mm (*D1 see Welded-in pipe lengths )... 189
Fig. 9.13 Dimensional diagram purge air unit *D1 diameter 150 mm (*D1 see Welded-in pipe lengths )... 190
Fig. 9.14 Dimensional diagram weather protection cover, measuring head D1 (pitch circle diameter
100)*............................................................................................................................................. 191

List of tables
D-R 290 9
Fig. 9.15 Dimensional diagram weather protection cover, reflector D1 (pitch circle diameter 100)*........... 191
Fig. 9.16 Dimensional diagram weather protection cover, measuring head D1 (pitch circle diameter
150)*............................................................................................................................................. 192
Fig. 9.17 Dimensional diagram weather protection cover, reflector D1 (pitch circle diameter 150)*........... 192
Fig. 9.18 Dimensional diagram weather protection cover, control electronics protective device................ 193
List of tables
Table 3.1 Typical scope of supply D‑R 290 ................................................................................................. 33
Table 3.2 Operating manual ........................................................................................................................ 34
Table 3.3 Optional equipment D‑R 290........................................................................................................ 34
Table 3.4 Optional version variants.............................................................................................................. 37
Table 4.1 Equation 1.................................................................................................................................... 45
Table 4.2 Equation 2.................................................................................................................................... 46
Table 4.3 Equation 3.................................................................................................................................... 46
Table 4.4 Legends in the formulae............................................................................................................... 47
Table 4.5 Flue stack correction factor.......................................................................................................... 47
Table 4.6 Equation 4.................................................................................................................................... 47
Table 4.7 Equation 5.................................................................................................................................... 47
Table 4.8 Equation 6.................................................................................................................................... 48
Table 4.9 Equation 1.................................................................................................................................... 48
Table 4.10 Equation 7.................................................................................................................................... 49
Table 4.11 Equation 8.................................................................................................................................... 49
Table 4.12 Standard systems D−R 290......................................................................................................... 51
Table 4.13 Welded-in pipe lengths ................................................................................................................ 52
Table 4.14 Reflectors..................................................................................................................................... 52
Table 4.15 Designation of device components: Measuring head and reflector.............................................. 54
Table 4.16 Designation of device components: Supply unit........................................................................... 56
Table 4.17 Designation of device components: Purge air unit....................................................................... 56
Table 4.18 Where do I find the type label? .................................................................................................... 58
Table 4.19 Example of a type label D‑R 290 ................................................................................................. 59
Table 5.1 Preconditions for operation.......................................................................................................... 66
Table 5.2 Equation 10.................................................................................................................................. 68
Table 5.3 Meaning of the LEDs and their flash codes.................................................................................. 81
Table 5.4 Switch settings SW1 and SW2..................................................................................................... 83
Table 6.1 PIN symbol overview.................................................................................................................... 111
Table 6.2 Checklist for parameter checking (general).................................................................................. 116
Table 6.3 Checklist for parameter checking (device-specific)...................................................................... 117
Table 7.1 D-ESI 100 quick info..................................................................................................................... 119
Table 7.2 Baud rate settings........................................................................................................................ 123
Table 7.3 Measured value output channel................................................................................................... 127
Table 7.4 Available type codes for the D-R 290........................................................................................... 128
Table 7.5 Measured value correction........................................................................................................... 130
Table 7.6 Values table: Measured value correction by polynomial (example)............................................. 132
Table 7.7 Measured value output channel................................................................................................... 133
Table 7.8 Relays, configuration of the outputs............................................................................................. 136
Table 7.9 Relays, configuration of the switching logic.................................................................................. 138
Table 7.10 Reference point check setpoint.................................................................................................... 140
Table 7.11 Default value setpoint................................................................................................................... 140

List of tables
10 D-R 290
Table 7.12 Specified values for control measurements................................................................................. 140
Table 7.13 Default value for fault indication suppression .............................................................................. 141
Table 7.14 Pin assignment of the 8-pin plug for purge air monitoring............................................................ 145
Table 7.15 Pin assignment of the device socket for connection of the 4-20 mA temperature transmitter..... 150
Table 8.1 Suggestion for checking and maintenance work.......................................................................... 155
Table 8.2 List of messages for D‑R 290 ...................................................................................................... 167
Table 8.3 List of warnings for the D‑R 290 .................................................................................................. 168
Table 8.4 List of simple faults for the D‑R 290 ............................................................................................ 171
Table 8.5 List of critical faults for the D‑R 290 ............................................................................................ 172
Table 9.1 Technical data, D-R 290 application data.................................................................................... 179
Table 9.2 Technical data, D-R 290 measuring head.................................................................................... 179
Table 9.3 Technical data, D-R 290 reflector................................................................................................. 180
Table 9.4 Technical data, D-SK AE control electronics protective device.................................................... 180
Table 9.5 Technical data, D-SK 290 MA fail-safe shutter protective device................................................ 180
Table 9.6 Technical data, D-TB 100 supply unit (terminal box)................................................................... 181
Table 9.7 Technical data, D-BL xxx purge air unit....................................................................................... 181
Table 9.8 Welded-in pipe lengths ................................................................................................................ 185