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wtw NitraLyt 700 IQ Operating Manual Download Page 48

Maintenance and changing the electrode

NitraLyt

®

700 IQ

5 - 4

ba75397d03

12/2004

5.1

Disposal

Sensor

We recommend disposing of the sensor as electronic refuse.

Electrodes

If no official regulations apply to the contrary, used and defective elec-
trodes can be treated as household waste.

8

Calibrate the sensor and the electrode with the measuring sys-
tem (see section 4.1).

Summary of Contents for NitraLyt 700 IQ

Page 1: ...ba75397e03 12 2004 NitraLyt 700 IQ Operating manual IQ SENSOR NET nitrate sensor...

Page 2: ...o we cannot guarantee that there are absolutely no errors in this manual Therefore we are sure you will understand that we cannot accept any legal claims resulting from the data figures or description...

Page 3: ...4 1 1 General information 5 1 4 1 2 Overview of the calibration procedures 5 2 4 1 3 Calibrating in practice 5 3 4 1 4 General course of a calibration 5 5 4 1 5 Calibration procedure 1 point standard...

Page 4: ...700 IQ 0 2 ba75397d03 12 2004 8 2 Measurement conditions 9 1 8 3 Characteristic data on delivery 9 2 9 Indexes 10 1 9 1 Explanation of the messages 10 1 9 1 1 Error messages 10 1 9 1 2 Info messages...

Page 5: ...ing manual Fig 1 1 Structure of the IQ SENSOR NET operating manual The IQ SENSOR NET operating manual has a modular structure like the IQ SENSOR NET itself It consists of a system operating manual and...

Page 6: ...fects of lightning strikes 1 3 Recommended fields of application The NitraLyt 700 IQ nitrate sensor forms a measuring system for the online determination of nitrate ions It supplements the oxygen mea...

Page 7: ...r was developed for applications in online measure ment essentially in the field of wastewater treatment Thus we assume that the operators are familiar with the necessary precautions to take when deal...

Page 8: ...SOR NET accessories 2 2 General safety instructions The sensor left the factory in a safe and secure technical condition Function and operational safety The failure free function and operational safet...

Page 9: ...adverse conditions for a lengthy period of time is visibly damaged no longer operates as described in this manual If you are in any doubt contact the supplier of your sensor Obligations of the operato...

Page 10: ...Safety NitraLyt 700 IQ 2 4 ba75397d03 12 2004...

Page 11: ...t may only be immersed in con junction with a mounted combination electrode Moisture must be pre vented from penetrating the nitrate sensor during the replacement of the electrode as otherwise the sen...

Page 12: ...he sensor and the SACIQ sensor connection cable and keep them safe 2 Plug the jack of the SACIQ sensor connection cable onto the plug head connector of the sensor At the same time rotate the socket so...

Page 13: ...traLyt 700 IQ sensor can be used as a wrench 1 Unscrew the protective hood from the sensor 2 Pull off the blind plug from the plug head socket of the sensor 3 Prepare the combination electrode to be m...

Page 14: ...75397d03 12 2004 4 Grease the two sealing rings 1 of the NitraLyt electrode using the grease from the tube supplied 5 Screw the reference electrode into the plug head socket of the sensor 6 Push the u...

Page 15: ...protective hood onto the sensor 8 Carry out the settings for the sensor on the terminal of the mea suring system see section 3 4 9 In the case of initial commissioning condition the sensor together w...

Page 16: ...r the voltage of the electrode Measuring range NO3 AutoRange 5 4500 mg l 0 5 450 0 mg l Two measuring ranges can be selected With AutoRange the instrument automati cally switches to the suitable measu...

Page 17: ...ed from the change in poten tial A known quantity of a standard solution is added to the test sample in two steps The NO3 concentration in the test sam ple is determined from the change in potential d...

Page 18: ...ring occasionally Cl compens On Off Chloride ions in the test sample interfere with the measurement and lead to in creased values see section 4 2 1 After determining the chloride content of the test s...

Page 19: ...sors Fig 3 3 140 Settings of sensors and diff sensors 5 Confirm the selection with g The settings of the sensor are displayed 6 Make the sensor settings with d and confirm each of them with g 7 Select...

Page 20: ...Commissioning NitraLyt 700 IQ 3 10 ba75397d03 12 2004...

Page 21: ...Why calibrate Calibrate during the initial commissioning after exchanging an elec trode and at regular intervals depending on the application Calibration log and calibration history The calibration hi...

Page 22: ...on Double std add 5 Calibration in the test sample with a double addition of standard solu tion Determined calibration data Depending on the calibration procedure single point or two point the followi...

Page 23: ...tting 59 16 mV is taken over A value that is taken over is marked with in the calibration history see section 4 1 10 Following the initial calibration we recommend to carry out a calibration with the...

Page 24: ...Sensor is optimally calibrated Electrode cannot be calibrated any more Electrode OK Calibration with 1 point reference 2 Following calibrations routinely e g with 1 point reference 2 guideline value...

Page 25: ...or the entire combination electrode an initial calibration see section 4 1 3 always has to be carried out Course Fig 4 2 Maintenance condition Note When the maintenance condition is activated linked...

Page 26: ...sensor Fig 4 4 200 Calibrate sensor 5 Confirm with g The following display or similar depending on the selected calibration procedure appears 6 The further course depends on the respective calibratio...

Page 27: ...owing display appears Fig 4 5 After calibrating Completing the calibration Note If the calibration was not successful appears on the display and a corresponding entry with instructions appears in the...

Page 28: ...he test sample see section 4 2 1 Activate the Cl compens function and adjust the chloride content see section 3 4 The chloride content of the sample does not affect calibration but the following measu...

Page 29: ...ation as described After completing the operating steps confirm with g The measurement is started Calibration successful Conc NO3 N x mg l Slope y mV Drift voltage z mV End of 1 POINT STAND 1 cal The...

Page 30: ...sensor for measuring again by simply abolishing the maintenance condition The sensor continues to use the old calibration data The reference voltage determined in step 1 of the calibration is not los...

Page 31: ...g steps during step 2 1 Take a sample 2 Determine the concentration of nitrate and chloride in the lab oratory With this procedure the chloride content of the sample affects calibration as well as mea...

Page 32: ...rmined Confirm with g Value of ref concentration x mg l NO3 N Confirm with g Set the reference concentration determined with d Confirm with g Confirm with g Calibration successful Conc NO3 N x mg l Sl...

Page 33: ...ontent see section 3 4 The chloride content of the sample does not affect calibration but the following measurement Operating steps during calibration Displays Explanation Unscrew protective hood Clea...

Page 34: ...for the condi tioning time of 15 minutes to expire The remaining time is shown on the display Discard used standard Immerse sensor in new standard with simi lar concentration Start calibration Immerse...

Page 35: ...Conditions and calibration range for simple standard addition Observe the following points for the simple standard addition The volume of the standard added to the test sample changes the test sample...

Page 36: ...gly Example The expected average concentration is approx 0 9 mg l NO3 N The vertical line in the diagram crosses three ranges Concentration 1 g l and volume ratio 200 1 Concentration 1 g l and volume...

Page 37: ...TD ADD 4 Determine reference voltage of test sample Have standard ready Confirm with g The measurement of the test sample begins Select standard concentration 1 10 g l NO3 Confirm with g Select the co...

Page 38: ...added is permanently fixed for the double standard addition First addition 1 of the sample volume Second addition 2 of the original sample volume After both additions the original nitrate content of...

Page 39: ...ut sample volume 100 1000 ml Confirm with g Select the volume of the sample with d Confirm with g Confirm with g Rinse electrode Immerse electrode in test sam ple Wait for a stable measured value Conf...

Page 40: ...he measurement begins Cal DOUBLE STD ADD 5 Reference voltage determined after first standard addition Confirm with g Add standard to sample Confirm with g Wait for a stable measured value Confirm with...

Page 41: ...story Sensor could not be calibrated Slope and or drift potential are outside the valid range Sensor blocked for measurement Service the sensor immediately see chapter 5 View the calibration history C...

Page 42: ...nged if the slope cannot be determined Instead the last determined slope value is taken over This applies for all single point calibration procedures 1 point stan dard 1 1 point ref 2 and Simple std a...

Page 43: ...and entering the chloride con tent in the Settings of sensors and diff sensors menu see section 3 4 Chloride compensation for calibration The presence of chloride affects the calibration results of th...

Page 44: ...tent The more the actual chloride content deviates from the value entered for the chloride compensation the more the displayed measured value deviates from the current nitrate content Fig 4 7 shows th...

Page 45: ...e We do not recommend unscrewing the sensor from the sensor connec tion cable when changing the electrode Otherwise moisture and or dirt can get into the plug connection where it can cause contact pro...

Page 46: ...ry to replace an electrode proceed as follows 1 Unscrew the protective hood from the sensor 2 Use the protective hood as a tool to lever out the electrode 3 Carefully pull out the electrode until the...

Page 47: ...NitraLyt 700 IQ Maintenance and changing the electrode 5 3 ba75397d03 12 2004 5 Screw in a new electrode 6 Push the unit into the sensor up to the stop 7 Screw the protective hood onto the sensor...

Page 48: ...Disposal Sensor We recommend disposing of the sensor as electronic refuse Electrodes If no official regulations apply to the contrary used and defective elec trodes can be treated as household waste 8...

Page 49: ...For the calibration procedures Simple std add 4 and Double std add 5 Model Order no NitraLyt 700 IQ 107022 Model Order no Reference electrode NitraLyt NHA 107024 Exchange electrode NitraLyt NHA AT 10...

Page 50: ...ories NitraLyt 700 IQ 6 2 ba75397d03 12 2004 Cleaning system Note Information on other IQ SENSOR NET accessories is given in the WTW catalog and in the Internet Model Order no CH Cleaning Head 900107...

Page 51: ...Cause Remedy No calibration performed Calibrate Electrode not connected or defective Check electrode and electrode connection Electrode contaminated Clean electrode Liquid has penetrated the sensor S...

Page 52: ...What to do if NitraLyt 700 IQ 7 2 ba75397d03 12 2004 Drift of the electrode too high Replace the electrode Cause Remedy...

Page 53: ...ring ranges and resolution Temperature range Max allowed overpressure 0 2 bar including sensor connection cable with installed NitraLyt combination electrode Connection technique Connection via SACIQ...

Page 54: ...Dimensions Weight Sensor with installed combi nation electrode and includ ing SACIQ sensor connection cable IP 68 0 2 bar 2x104 Pa Sensor plug head connector without sensor connection cable sensor wi...

Page 55: ...ta Instrument safety Nominal voltage Max 24 VDC via the IQ SENSOR NET for more details see TECHNICAL DATA chapter of the IQ SENSOR NET system oper ating manual Power consumption 0 2 W Protective class...

Page 56: ...Technical data NitraLyt 700 IQ 8 4 ba75397d03 12 2004...

Page 57: ...traLyt 700 IQ end with the number 361 9 1 1 Error messages Message code Message text EA1361 Meas range exceeded or undercut Check process Select other meas range EA2361 Sensor temperature too high Che...

Page 58: ...nents ES1361 Component hardware defective Contact WTW Message code Message text Message code Message text IC1361 Sensor has been successfully calibrated For calibration data see calibration history IC...

Page 59: ...us info via a manual query in the Settings Service List of all components menu see system operating manual via an automated query of a superordinate process control e g when connected to the Profibus...

Page 60: ...Indexes NitraLyt 700 IQ 9 4 ba75397d03 12 2004...

Page 61: ...Wissenschaftlich Technische Werkst tten GmbH Dr Karl Slevogt Stra e 1 D 82362 Weilheim Germany Tel 49 0 881 183 0 49 0 881 183 100 Fax 49 0 881 183 420 E Mail Info WTW com Internet http www WTW com...

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