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NRG 26-60 - Installation & Operating Manual -

819875-00

Function

The NRG 26-60 level electrode functions according to capacitive measurement and converts the fill level
information into a data telegram. The measurement range of 0 - 100 % is scalable along the effective
length of the electrode rod.

Automatic self-test

An automatic self-test cyclically monitors the safety and function of the level electrode and measured
value recorder.
Faults in the electrical connection or electronic measuring equipment trigger error signals and alarms.
The data are transferred to the NRR 2-6x level controller via an ISO 11898 CAN bus in the CANopen
protocol.

These data telegrams contain the following information:

■

■

Measured level value as raw data

■

■

Measured level value scaled between 0 – 100 %, as a 16-bit data word in high resolution

■

■

Measure level value scaled in 1 % stages without decimal places

■

■

Status or error information

■

◆

Error signals in the event of faults in electronic or mechanical parts

■

◆

Temperature in the level electrode terminal box

Controller functions

The NRG 26-60 level electrode can be used together with a NRR 2-60 / NRR 2-61 level controller as
a water level controller. The controller is parametrised exclusively using the URB 60 visual display and
operating unit.

The alarm limits are set using the URB 60. Read the relevant Installation & Operating Manual.

For information on how the alarm contacts function, please read the Installation & Operating
Manual of the corresponding NRR 2-60 or NRR 2-61 level controller.

The level electrode is installed inside steam boilers, tanks or feed lines of water boilers. A protective tube
provided on site keeps it functioning reliably (see page 25 “Installation examples”).
A capacitive NRG 26-60 level electrode can be installed in a protective tube or level pot together with an
NRG 1x-60 or NRG 1x-61 level electrode.

Operation in external level pots

If a level electrode is installed in a lockable level pot outside the boiler, the connecting pipes must be
flushed regularly.
If the steam pipe is ≥ 40 mm and the water pipe is ≥ 100 mm, installation is regarded as internal. In this
case, upstream monitoring of flushing processes is not required.

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Содержание NRG 26-60

Страница 1: ...Original Installation Operating Manual E N English Level Electrode NRG 26 60 819875 00 ...

Страница 2: ...Notes on product liability 11 Function 12 Technical data 15 Name plate Identification 17 Factory settings 18 Overall view of the NRG 26 60 19 Dimensions of the NRG 26 60 20 Preparing for installation 21 Installation 22 Sealing surface dimensions for NRG 26 60 23 Example 23 Installing two level electrodes in a flange 24 Installation examples with dimensions 25 Aligning the terminal box 30 Functiona...

Страница 3: ... P 38 Performing a calibration to the upper bound of the active measurement range CAL H 100 calibration value 39 Setting the filter constant Filt 39 Manually triggering a display test 39 Activating URB 2 compatibility ConP 40 Check the MIN and MAX limit values of the NRR 2 6x level controller by raising or lowering the level 40 Starting operation and testing 41 System malfunctions 43 Causes 43 Ind...

Страница 4: ...8 2019cm Copyright All rights reserved Any misuse particularly reproduction and dissemination to third parties is not permit ted The General Terms Conditions of GESTRA AG apply Scope of delivery Product package 1 x NRG 26 60 level electrode 1 x Sealing ring D 27 x 32 form D DIN 7603 2 4068 bright annealed 1 x Installation Operating Manual ...

Страница 5: ...ollow all instructions Please also read the instructions for use of any accessories The Installation Operating Manual is part of the equipment package Keep it in an easily accessible location Availability of this Installation Operating Manual Make sure this Installation Operating Manual is always available to the operator If you pass on or sell the equipment to a third party please also hand over ...

Страница 6: ...tuation that results in death or serious injury WARNING Warning of a dangerous situation that may possibly result in death or serious injury CAUTION Warning of a situation that may result in minor or moderate injury ATTENTION Warning of a situation that results in damage to property or the environment ...

Страница 7: ...SRL etc Equipment and type designations of GESTRA AG see page 9 SELV Safety Extra Low Voltage Operating point of the system The operating point describes the operating parameters at which a system or boiler is operated in the nominal range In a steam boiler for example these would be the parameters output pressure and temperature The design data may be much higher however A boiler operated at 10 b...

Страница 8: ...ree of reproducibility and maintain the measurement quality see Technical data on page 15 it is necessary to install the sensor in a protective tube see Installation examples with dimensions on page 25 The dielectric constant of the measured medium may require an adjustment to the measurement frequency if it deviates significantly from the usual water Er 80 Please contact GESTRA Service Visualisat...

Страница 9: ...RR level controller continuous URB visual display and operating unit To ensure the proper use of equipment during all types of use you must also read the Installa tion Operating Manuals for the system components used You will find the current operating instructions for the system components named in Fig 1 on our website http www gestra com documents brochures html Improper use There is a danger of...

Страница 10: ...nection work Check that the system is not carrying live voltage before commencing work Danger to life from faulty NRG 26 60 level electrode due to the sudden escape of hot steam or hot water Impacts during transport or installation can lead to damage or leaks on the NRG 26 60 level electrode causing pressurised hot steam or hot water to escape through the pressure relief hole Avoid damage during t...

Страница 11: ...ctive and may only be brought into service by suitable trained staff Operation Boiler service technician Staff trained by the plant operator Maintenance work Specialist staff Maintenance and conversions may only be performed by authorised staff who have undergone specific training Conversions Specialist staff Persons trained by the plant operator to work with pressure and temperature Fig 2 Notes o...

Страница 12: ...ture in the level electrode terminal box Controller functions The NRG 26 60 level electrode can be used together with a NRR 2 60 NRR 2 61 level controller as a water level controller The controller is parametrised exclusively using the URB 60 visual display and operating unit The alarm limits are set using the URB 60 Read the relevant Installation Operating Manual For information on how the alarm ...

Страница 13: ...parameters CAL L CAL P or CAL H see page 38 39 This is the only way to gain all the benefits of a high measurement resolution in the sight glass Behaviour in the event of an alarm level value above or below limit The scaled level value is transferred by CAN data telegram to the level controller NRR 2 60 or NRR 2 61 Depending on how the alarm limit values are set in the level controller an alarm is...

Страница 14: ...arametrising changing the factory settings You can adjust the electrode s parameters to the on site system conditions if necessary You can adjust the parameters or change the factory settings using a rotary knob on the terminal box see page 34 ff Function ...

Страница 15: ...th at 238 C all measurements in mm Max installed length 373 477 583 688 794 899 1004 Measuring range 300 400 500 600 700 800 900 Max installed length 1110 1214 1319 1423 1528 1636 2156 Measuring range 1000 1100 1200 1300 1400 1500 2000 The electrode rod must not be shortened Measurement quality The following information applies for a fluid conductivity range of 100 10000 µS cm compensated to 25 C ...

Страница 16: ...digit green 7 segment display for showing status information 1 x red LED for indicating an alarm 1 x green LED for indicating OK 1 x rotary knob IP65 with button for menu navigation and test function Protection class III Safety Extra Low Voltage SELV IP rating to EN 60529 IP 65 Admissible ambient conditions Service temperature 0 C 70 C Storage temperature 40 C 80 C Transport temperature 40 C 80 C ...

Страница 17: ...perature Admissible ambient temperature Current approval Manufacturer Serial number IP rating Supply voltage CE marking Appointed authority Disposal information Protection class Fig 3 Measuring range Data interface Betriebsanleitung beachten See installation instructions Voir instructions de montage GESTRA AG Münchener Str 77 28215 Bremen GERMANY TÜV xx xx xxx NRG 26 60 Niveauelektrode Level elect...

Страница 18: ... Parameter values Unit NRG 26 60 Controller group GrP 0001 Baud rate bd rt 0050 KBit s Lower bound calibration CAL L variable 0 Raw value hex approx 50 mV at ADC Measurement range section calibra tion CAL P variable 25 Raw value hex Upper bound calibration CAL H variable 100 Raw value hex approx 2 0 V at ADC Filter constant FiLt 0005 Seconds Compatibility mode ConP oFF Fig 4 ...

Страница 19: ...ED display alarm LEDs and rotary knob see page 41 C Cover screws M4 x 16 mm D M12 CAN bus socket 5 pole A coded E M12 CAN bus connector 5 pole A coded G Seal seat for sealing ring J Electrode H Sealing ring D 27 x 32 form D DIN 7603 2 4068 bright annealed F Sheath simplified representation I Electrode thread K PTFE electrode rod insulation ...

Страница 20: ...at 238 C Measuring range 373 300 477 400 583 500 688 600 794 700 899 800 1004 900 1110 1000 1214 1100 1319 1200 1423 1300 1528 1400 1636 1500 2156 2000 OK 140 G Fig 6 Size 41 All lengths and diameters in mm 0 Nm 50 70 90 110 120 100 80 60 41 175 b 70 26 2 37 1 338 20 Thermal insulation provided on site Ø 15 ...

Страница 21: ...rature is below freezing At temperatures below freezing use a suitable heat source e g control cabinet heater etc Connect all system parts to a central earthing point to prevent equalisation currents Use a cover to protect the equipment from direct sunlight condensation and heavy rain Use UV resistant cable ducts for routing the connecting cable Take further measures to protect the equipment from ...

Страница 22: ...ns in the system or the level electrode Inspect the sealing surfaces of tank threaded standpipes or flange covers to ensure they are perfectly machined see Fig 7 Take care not to bend level electrodes during installation Avoid hard impacts against the electrode rod The level electrode may be inclined at 45 only when being used in a two hole flange with the length of the electrode rod limited to 68...

Страница 23: ... surface dimensions for NRG 26 60 Fig 7 2 Push the supplied sealing ring H onto the seal seat G of the electrode or lay it on the sealing surface of the flange DANGER Danger to life from escaping hot steam if incorrect or defective seals are used Only use the supplied sealing ring for sealing the electrode thread I Sealing ring D 27 x 32 DIN 7603 2 4068 bright annealed Prohibited seal materials He...

Страница 24: ...tallation example with dimensions see Fig 9 page 25 Installing two level electrodes in a flange 1 Fit the first electrode as described above 2 Slacken and remove the rear body panel of the second electrode opposite the operating unit 3 Unfasten the electrode wiring from the PCB 4 Slacken the nut in the body of the second electrode using a size 19 open ended spanner 5 Screw in the second electrode ...

Страница 25: ... Manual 819875 00 Installation examples with dimensions Protective tube provided on site for internal installation Image not to scale Key see page 30 All lengths and diameters in mm G DN 50 Ø 20 20 90 Ø 20 1 2 0 4 5 6 8 3 26 9 x 14 Fig 9 ...

Страница 26: ...ual 819875 00 2 Installation examples with dimensions Protective tube provided on site for internal installation Image not to scale Key see page 30 Fig 10 G DN 50 Ø 20 20 26 Ø 20 90 1500 1 2 3 4 5 6 0 All lengths and diameters in mm x 9 14 8 ...

Страница 27: ...amples with dimensions Protective tube provided on site for internal installation combined with other GESTRA AG devices Image not to scale Key see page 30 G G DN 100 24 5 26 0 20 Ø 20 14 3000 26 90 Ø 20 1 2 3 4 7 8 0 All lengths and diameters in mm 24 5 26 0 Fig 11 9 x 5 ...

Страница 28: ...perating Manual 819875 00 2 Installation examples with dimensions Level pot DN 80 for external use Image not to scale Key see page 30 G DN 20 HW DN 2 LW DN 2 DN 20 1 4 8 0 All lengths and diameters in mm Fig 12 DN 20 5 26 x 9 14 ...

Страница 29: ...g 13 Installation examples with dimensions Oblique installation e g in steam boilers The level electrode must not be at an incline of more than 45 and the length of the electrode rod is limited to 688 mm maximum Image not to scale All lengths and diameters in mm Tube e g 33 7 x 3 2 1 3 3 ...

Страница 30: ...rance as per AFAQ DN 100 7 Protective tube DN 100 8 Distance between electrode rod and protective tube 14 mm 9 Minimum dimension x 10 mm below the installed length installed length see page 15 20 0 Lowest possible LW mark end of measuring range Reducer DIN 2616 2 K 88 9 x 3 2 42 4 x 2 6 W Reducer DIN 2616 2 K 114 3 x 3 6 48 3 x 2 9 W Level pot DN 80 Centre distance of connection Additional electro...

Страница 31: ...00 Functional elements Fig 14 OK A Terminal box B Cover screws M4 x 16 mm C Operating panel with 4 digit LED display alarm and status LEDs and rotary knob see page 41 D M12 CAN bus socket 5 pole A coded E M12 CAN bus connector 5 pole A coded A B C D E ...

Страница 32: ...the measuring sensors 0 2 A at 24 V is required per sensor With 5 sensors there is therefore a voltage drop of approx 8 V per 100 m when using cables of 0 5 mm In this case the system is operating at its limits If using 5 sensors or more and a cable length 100 m the wire cross section needs to be doubled to 1 0 mm At larger distances of 100m the 24 V DC supply can also be connected on site Example...

Страница 33: ...network a 120 Ω terminating resistor must be connected to the first and last units between terminals CL CH Use the CAN bus connector with terminating resistor if you are using the level electrode as the first or last unit Only one URS 60 and one URS 61 safety control unit may be used in the CAN bus network The CAN bus network must not be interrupted during operation If it is an alarm is triggered ...

Страница 34: ...ing resistor connected to the terminal devices of the CAN bus line Next switch on the supply voltage Changing the factory settings if necessary You will need the following tools Slotted screwdriver size 2 5 Note on commissioning During commissioning the scaling of the measurement 0 100 is set ex works at a maxi mum for the corresponding electrode length After installation set the measurement range...

Страница 35: ...rameters see page 36 If you do not set a parameter within 10 seconds the process is aborted quit and the old parameter value is retained 4 Save your set value by pressing the rotary knob for approx 1 second The response donE appears and the display returns to the parameters If you do not enter anything for 30 seconds the display automatically shows the actual value 2 Once you have selected a param...

Страница 36: ... for operation with SPECTORconnect do not change setting ConP oFF Notes on changing the communication parameter GrP or bd rt In general all GESTRA AG CAN bus devices are delivered ex works with pre set communi cation parameters that make it possible to bring a standard system into service without any changes Observe the following rules if you have to make changes to the communication parameters Se...

Страница 37: ...red controller group 1 to 4 The controller groups correspond to the following CAN bus node IDs Controller group 1 node ID 40 Controller group 2 node ID 45 Controller group 3 node ID 60 Controller group 4 node ID 65 4 Save your set value by pressing the rotary knob for approx 1 second Changing the baud rate bd rt You must set the same baud rate for all bus participants Note the setting instructions...

Страница 38: ...x 3 seconds 3 Press and hold the rotary knob until the new value appears on the display 4 Save your set value by pressing the rotary knob for approx 1 second 5 Continue with the calibration CAL P or CAL H Performing an independent quick calibration to a water level 25 of the active measurement range CAL P Alternatively to completely filling the boiler this parameter allows partial filling The valu...

Страница 39: ...ructions on page 35 and proceed as follows 1 Select the parameter Filt The current filter constant value is displayed 2 Press and hold the rotary knob until the current time constant flashes on the display 3 Set the desired time constant 1 to 30 seconds 4 Save your set value by pressing the rotary knob for approx 1 second Manually triggering a display test Note the setting instructions on page 35 ...

Страница 40: ... your set value by pressing the rotary knob for approx 1 second Check the MIN and MAX limit values of the NRR 2 6x level controller by raising or lowering the level Incorrectly installed or bent level electrodes result in a loss of function that can jeopard ise system safety Proceed as follows every time you bring the NRG 26 60 level electrode into service or change it Check the MIN and MAX limit ...

Страница 41: ...ttings OK Note on the display priority of the individual messages The fault signals are displayed according to their priority Signals with higher priority are always displayed before those with low priority If there are multiple signals the display will not switch between the individual signals Priority in fault code display Higher value fault codes overwrite lower value codes in the display Fault...

Страница 42: ...a fault Display e g E005 LED 1 Alarm LED lights up red A fault code is permanently displayed fault codes see page 44 A malfunction is active LED 2 Operating LED is OFF A fault is present The malfunction or faulty state is transferred to the level controller NRR 2 60 NRR 2 61 via CAN data telegram Here the malfunction triggers an immediate alarm Malfunctions in the electrode cannot be acknowledged ...

Страница 43: ...s etc Wiring Does the wiring conform to the wiring diagrams Is the bus line polarity correct throughout Is a 120 Ω terminating resistor connected to the terminal devices of the CAN bus line Configuration of the level electrode Is the level electrode set to the correct controller group GrP 1 2 3 or 4 Baud rate Is the cable length correct for the set baud rate Is the baud rate identical for all unit...

Страница 44: ...electrode E 004 Ch1Ch2DiffErr Over 10 deviation between channels 1 and 2 internal short circuit Replace the level electrode E 005 MaxCh1Err Measured value of channel 1 above maximum potential internal open circuit Replace the level electrode E 006 MinTSTCh1Err Measured value channel 1 internal capacity 47pF Replace the level electrode E 007 MaxTSTCh1Err Measured value channel 1 reference capacity ...

Страница 45: ...m voltage 3 V outside limits Replace the level electrode E 022 V1Err System voltage 1 V outside limits Replace the level electrode E 023 V12Err System voltage 12 V outside limits Replace the level electrode E 024 CANErr Communication failure Check the baud rate wiring and terminating resistors E 025 ESMG1Err µC error Replace the level electrode E 026 BISTErr µC periphery self test error Replace th...

Страница 46: ...o error messages appear Remedy The vent hole is blocked or flooded or may be missing entirely in certain circumstances Check the protective tube Add a vent if necessary The stop valves of an external measuring cylinder option are closed Check the stop valves and open if necessary A long operating and well set electrode delivers increasingly inaccurate measured values Possible causes if no error me...

Страница 47: ...l electrical connections The device fails to work Display and LEDs illuminate Possible causes if no error messages appear Remedy The earth connection to the vessel is interrupted Clean the sealing surfaces and screw in the level electrode with a metal sealing ring see page 23 Flashing values from t 71 to t 75 appear in the display Possible causes Remedy The ambient temperature of the electrode ter...

Страница 48: ...ringing into service and every time the NRG 26 60 level electrode is replaced The system faults in the NRG 26 60 level electrode lead to a fault shutoff in the level controller NRR 2 60 NRR 2 61 The alarm contacts switch without delay For information on precisely how the alarm contacts function please read the Installation Operating Manual of the corresponding NRR 2 60 or NRR 2 61 If you require a...

Страница 49: ...f 0 bar WARNING Hot level electrode can cause severe burns The level electrode is very hot during operation Perform installation and maintenance work only on a level electrode that has been allowed to cool Only remove level electrodes that have cooled down Proceed as follows 1 Reduce the boiler pressure to 0 bar 2 Allow the level electrode to cool to room temperature 3 Switch off the supply voltag...

Страница 50: ...turned or sent back to GESTRA AG The term media can refer to solid liquid or gaseous substances or mixtures as well as radia tion GESTRA AG only accepts returned products with a filled out and signed return note along with a filled out and signed decontamination declaration The return confirmation and decontamination declaration must be attached to the outside of the return package as processing w...

Страница 51: ...irective 2014 68 EU EU Pressure Equipment Directive Directive 2014 35 EU Low Voltage Directive Directive 2014 30 EU EMC Directive Directive 2011 65 EU RoHS Directive Please see our Declaration of Conformity for details on the conformity of our equipment with European Directives The current Declaration of Conformity can be found on the internet at www gestra com or requested from us ...

Страница 52: ... Bremen Germany Phone 49 421 3503 0 Fax 49 421 3503 393 E mail info de gestra com Web www gestra com You can find our authorised agents around the world at www gestra com 819875 00 08 2019cm 808949 00 GESTRA AG Bremen Printed in Germany ...

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