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Contents

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Page

Fault-finding list for troubleshooting ................................................................................................ 28, 29

Cleaning the measuring electrode .........................................................................................................29

Exchanging the electronic insert ...........................................................................................................30

Note .....................................................................................................................................................30

Malfunctions

Correcting the measured value .............................................................................................................26

Checking the temperature coefficient setting T

k

....................................................................................26

Adapting cell constant ..........................................................................................................................26

Functional test ......................................................................................................................................27

LEDs and malfunction indication ...........................................................................................................27

Operation

Danger .................................................................................................................................................31

Exchanging the conductivity transmitter ...............................................................................................31

Disposal................................................................................................................................................31

Decommissioning

Basic Settings

Factory setting .....................................................................................................................................22

Establishing measuring range and actual value output ................................................................... 22, 23

Checking temperature coefficient setting T

k

..........................................................................................24

Commissioning Procedure

Checking electrical connection .............................................................................................................25

Applying mains voltage .........................................................................................................................25

Note .....................................................................................................................................................25

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Содержание LRGT 16-1

Страница 1: ... LRGT 16 1 LRGT 16 2 LRGT 17 1 Installation Instructions 818726 03 Conductivity Transmitter LRGT 16 1 Conductivity Transmitter LRGT 16 2 Conductivity Transmitter LRGT 17 1 GESTRA Steam Systems EN English ...

Страница 2: ...llation Electrical Connection Technical Data LRGT 16 1 LRGT 16 2 LRGT 17 1 7 8 Name plate marking 9 Dimensions 10 12 Key 14 Examples of installation 16 17 Key 17 Tools 17 Examples of Installation LRGT 16 1 LRGT 16 2 LRGT 17 1 13 Key 14 Functional Elements LRGT 16 1 LRGT 16 2 LRGT 17 1 18 Connecting the conductivity transmitter 18 19 Key 10 Safety power supply unit for LRGT 16 1 LRGT 16 2 LRGT 17 1...

Страница 3: ...efficient setting Tk 26 Adapting cell constant 26 Functional test 27 LEDs and malfunction indication 27 Operation Danger 31 Exchanging the conductivity transmitter 31 Disposal 31 Decommissioning Basic Settings Factory setting 22 Establishing measuring range and actual value output 22 23 Checking temperature coefficient setting Tk 24 Commissioning Procedure Checking electrical connection 25 Applyin...

Страница 4: ...for conductivity limiting or continuous boiler blowdown in steam boilers the conductivity transmitters LRGT 16 1 LRGT 16 2 and LRGT 17 1 must only be used in conjunction with the industrial controller KS 90 1 To ensure trouble free operation the requirements made on water quality according to TRD and EN regulations must be met Use the equipment only within the specified pressure and temperature ra...

Страница 5: ...ring electrodes and the conductivity transmitter LRGT 16 2 works according to the conductometric measuring method using four measuring electrodes The equipment measures the conductivity of electrically conductive fluids TDS content and provides a 4 20 mA measuring current as a function of the detected conductivity value The conductivity transmitters are designed for use with the industrial control...

Страница 6: ... calculated from the measuring voltages UU and UI and as a function of the adjusted temperature coefficient Tk linearly based on the reference temperature of 25 C Once converted into a conductivity dependent current signal an output current of 4 20 mA is available for external use The cables leading to the measuring electrode the reference tube and the resistance thermometer are monitored and chec...

Страница 7: ...acer disk PEEK HT Measuring length and length of installation do not cut electrode tips 200 300 400 500 600 800 1000 mm max 400 mm for marine applications Temperature sensor Resistance thermometer Pt 1000 Measuring cycle 1 sec Temperature compensation Linear Tk adjustable via code switch 0 per C 1 6 3 0 per C in steps of 0 1 Time constant measured according to two bath process Temperature 9 sec Co...

Страница 8: ...continued LRGT 16 1 LRGT 17 1 Measuring range µS cm at 25 C Current output mA µS cm 4 mA corresponds to 20 mA corresponds to 100 3000 100 3000 5000 5000 7000 7000 10000 10000 Adjustable via code switch Max load for actual value output 750 ohm Conversion of μS cm in ppm part per million 1 μS cm 0 5 ppm LRGT 16 2 Measuring range µS cm at 25 C Current output mA µS cm Preferred measuring range to 500 ...

Страница 9: ...quipment designation Fig 1 Pressure rating screwed connection material number Application specifications Electric rating Measuring range Specification of actual value output CE marking Manufacturer Spare part specifications Safety note Disposal note ...

Страница 10: ...10 1 Technical Data continued Fig 2 LRGT 16 1 E A L Dimensions E mm 200 300 400 500 600 800 1000 b 68 A F 41 28 40 1 to EN ISO 228 1 RA 12 5 RA 3 2 0 5 173 336 20 C M 1 to EN ISO 228 1 N ...

Страница 11: ...1 Technical Data continued Fig 3 LRGT 17 1 Dimensions continued Cable gland A L E mm 200 300 400 500 600 800 1000 b 68 A F 41 28 173 336 20 M 1 to EN ISO 228 1 E N 40 1 to EN ISO 228 1 RA 12 5 RA 3 2 0 5 ...

Страница 12: ...12 E Technical Data continued Fig 4 LRGT 16 2 Dimensions continued E mm 200 300 400 500 600 800 1000 A C E L 40 1 to EN ISO 228 1 RA 12 5 RA 3 2 0 5 b 68 A F 41 173 336 20 1 to EN ISO 228 1 28 ...

Страница 13: ...13 Functional Elements Fig 5 LRGT 16 1 LRGT 16 2 LRGT 17 1 B G F I H J 3 2 1 K C D Fig 6 LRGT 16 1 without cover plate Toggle switch white ...

Страница 14: ...ess head screws M4 C EMC cable gland M 20 x 1 5 D Housing cover E Measuring length and length of installation F Terminal strip G Fixing screws for electronic circuit board H Functional earth connection I Seat ring J Fixing nut for terminal box K Terminal lugs for electrode lines functional earth L Thermal insulation M Reference tube N Set screw M 2 5 DIN 913 Key ...

Страница 15: ...r metallic fittings as well as the low water level LW Do not cut the measuring electrode Avoid impacts and shocks to the electrode Note For the approval of the boiler standpipe the relevant local and national regulations must be observed Several examples of installation are shown on pages 17 18 LRGT 16 1 for marine applications Max admissible length of measurement and installation 400 mm When inst...

Страница 16: ...irect installation of conductivity trans mitter via measuring pot and connection of a continuous blowdown valve Fig 8 NW LW NB A GESTRA Steam Systems GESTRA Steam Systems GESTRA LRGT GESTRA LRGT µS ppm LRGT 16 1 LRGT 16 2 LRGT 17 1 4 A 4 5 6 8 A 250 415 336 1 BSP EN ISO 228 1 R 250 600 336 1 BSP EN ISO 228 1 R 197 DN mm A mm 15 182 20 184 25 184 40 189 R LRGT 16 1 LRGT 17 1 R 30 mm LRGT 16 2 R 60 ...

Страница 17: ... continuous blowdown control installation of conductivity transmitter in blowdown line via separate measuring pot M GESTRA Steam Systems GESTRA Steam Systems GESTRA LRGT GESTRA LRGT µS ppm 6 5 1 BSP EN ISO 228 1 DN 15 40 Outlet Inlet DN 15 40 7 A Tools Open end spanner 18 19 A F Open end spanner 41 A F Screwdriver for hexagon socket head screws size 1 3 Screwdriver for cross recess head screws siz...

Страница 18: ...ut the lamellar insert P Fig 10 4 Cut off outer sheath of the cable S and expose the braided screen Q over a length of approx 10 15 mm 5 Push cap nut N and lamellar insert P with sealing ring O onto the cable 6 Bend braided screen Q outwards at a right angle 90 7 Fold braided screen Q towards outer sheath i e by 180 8 Push lamellar insert P with sealing ring O into gland body R turn it briefly aro...

Страница 19: ...19 Connecting the conductivity transmitter continued Electrical Connection continued N Cap nut O Sealing ring P Lamellar insert Q Braided screen R Gland body S Shielded cable Key Fig 10 O R N S Q P ...

Страница 20: ...0950 electrically protective separation The PSU must be equipped with a protective device to DIN EN 61010 1 Tools Screwdriver for cross recess head screws size 1 Screwdriver for slotted head screws size 2 5 completely insulated to VDE 0680 1 Open end spanner 12 A F Open end spanner 18 19 A F Safety power supply unit for LRGT 16 1 LRGT 16 2 LRGT 17 1 Electrical Connection continued Wiring diagram f...

Страница 21: ... continued Wiring diagram for conductivity transmitter LRGT 16 2 Fig 12 Terminal lug Connecting point for functional earth Earth Measuring electrode Toggle switch white 4 20 mA load max 750 Ω 24 V DC Temperature sensor Pt 1000 ...

Страница 22: ...onal test In the following tables the factory settings are highlighted in grey 1 Establish the measuring range control range of the conductivity transmitter on the basis of the conductivity range of the steam boiler 2 Set the desired measuring range via code switch You can use a ball point pen to set the code switch When the supply voltage is applied during commissioning the first output will be 4...

Страница 23: ... µS cm 1 2 3 4 mA is equivalent to 20 mA is equivalent to OFF OFF OFF 100 3000 100 3000 ON OFF OFF 5000 5000 OFF ON OFF 7000 7000 Factory setting ON ON OFF 10000 10000 ON ON ON 12000 12000 LRGT 16 2 When the supply voltage is applied during commissioning the first output will be 4 mA then the output current increases until it reaches the actual value ...

Страница 24: ...rect the readings of the transmitter by adjusting a lower or higher temperature coefficient Continue modifying the Tk setting step by step until the indicated conductivity value and measured comparison value agree Please wait 1 to 2 minutes after each step until the measured value has settled Code switch Temperature coefficient TK C 4 5 6 7 OFF OFF OFF OFF 0 no compensation ON OFF OFF OFF 1 6 OFF ...

Страница 25: ...ram Fig 11 12 page 20 21 2 Make sure that the mains voltage is the same as indicated on the name plate Checking electrical connection Apply mains voltage Applying mains voltage Note To remedy malfunctions that might occur during the commissioning procedure see chapter Systematic malfunction analysis on page 28 29 ...

Страница 26: ...e has adjusted itself n Repeat this procedure step by step until the indicated value matches the measured comparison value n If the conductivity transmitter and the controller are spatially separated the adaptation must be made by a second person or by measuring the current in the transmitter n If an adaptation is no longer possible remove the transmitter and clean the measuring surface and or the...

Страница 27: ...ormal operation Green LED Red LED Current output mA Conductivity 0 to 10 of measured range lit proportional to measured value Conductivity 10 to 90 of measured range lit lit proportional to measured value Conductivity 90 to 100 of measured range lit proportional to measured value Flashing LEDs indicate a malfunction Malfunction Green LED Red LED Current output mA Electrode lines interrupted or mea...

Страница 28: ...ed Remedy Check connections of the electrode lines electronic insert terminal lugs 1 4 Replace equipment if necessary Check water level and installation LED display Red LED flashing Current output 4 mA Fault Value below 0 setting e g measuring surface measuring electrodes exposed Remedy Check water level and installation LED display Green LED flashing Current output 20 mA Fault Value above 100 set...

Страница 29: ...ectrode Fault finding list for troubleshooting continued LED display Red and green LEDs are flashing alternately Current output 0 5 mA Fault Electrical connections to resistance thermometer interrupted or short circuited thermometer defective Remedy Check thermometer connections electronic insert terminal lugs 5 6 Replace equipment if necessary Inaccurate readings Fault Conductivity reading higher...

Страница 30: ...r LRGT 16 2 5 Install the new electronic insert in reverse order Exchanging the electronic insert Note Please indicate the version and material numbers stated on the name plate when ordering spare parts After replacing the electronic insert check the conductivity readings of the controller KS 90 1 by carrying out a comparison measurement If you encounter any deviations correct the cell constant of...

Страница 31: ...ove the housing cover D 3 Disconnect the connecting wires from the terminal strips F and pull wires out of the cable gland 4 Remove the conductivity transmitter 5 Install and connect the new conductivity transmitter 6 Switch on voltage supply Disposal Remove the conductivity transmitter and separate the waste materials in accordance with the material specification Electronic components boards must...

Страница 32: ...8 62 49 40 E Mail fcd_gestra_singapore flowserve com Web www gestra com Flowserve GB Limited Abex Road Newbury Berkshire RG14 5EY Tel 0044 16 35 46 99 90 Fax 0044 16 35 3 60 34 E mail gestraukinfo flowserve com Web www flowserve com Great Britain USA Flowserve GESTRA U S 2341 Ampere Drive Louisville KY 40299 Tel 001 502 267 22 05 Fax 001 502 266 53 97 E mail fcd gestra usa flowserve com South Afri...

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