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ABB AWT420, Инструкция по эксплуатации

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AW T4 20 |

  U N I V ER S A L 4 - W I R E , D UA L- I N P U T T R A N SM I T T ER  |  O I/AW T4 2 0 - EN R E V. B

59

pH/Redox/ORP

This section describes how to calibrate the sensor and involves measuring the  
sensor’s sensitivity to pH and temperature by exposing the sensor to samples of  
known pH/Temperature values

Notes

. 

•  Access to the 

Calibrate 

menu is via 

Calibrate

 and 

Advanced 

levels only.

•  During calibration, current outputs and alarms are set to hold automatically  

if 

Hold Outputs 

is enabled – see below.

Menu

Comment

Default

Sensor Cal

See 

pH/Redox/ORP calibration

, page 52

 There are four possible calibration modes:
•  1-point manual calibration (adjusts the calibration check value)
•  2-point manual calibration (adjusts the check and slope values)
•  1-Point automatic calibration (adjusts the calibration check value)
•  2-Point automatic calibration (adjusts the check and slope values)

Note .

 Automatic calibrations are not available for Redox/ORP measurements

Temperature Cal 

See 

Temperature calibration procedure

, page 69

 .

Edit Cal

  pH Slope

Note: 

pH sensors only.

Edit the slope value:
•  Valid slope values range from 40 to 150 %

100%

  pH Offset

Note: 

pH sensors only.

Edit the offset value:
•  Valid offset values are: 0.00 to 14.00pH

7.00pH

  mV Slope

Note: 

Redox/ORP sensors only.

Edit the slope value:
•  Valid slope values range from 40 to 150 %

100%

  mV Offset

Note: 

Redox/ORP sensors only.

Edit the offset value:
•  Valid offset values are: ±1000mV

0mV

  Temp . Slope

Edit the temperature slope value:
•  Valid slope values range from 40 to 160 %

100%

  Temp . Offset

Edit the temperature offset value:
•  Valid offset values are ±40 °C

0°C

Sample Collection

Note: 

pH sensors only.

See 

In process calibrations

, page 79.

Collection Complete

Note: 

pH sensors only

See 

In process calibrations

, page 79.

Restore Cal Defaults

Resets slope and offset values to default values.

Calibrate

Exit

Menu

Select

Содержание AWT420

Страница 1: ...procedures refer to the specific sensor manual For more information Further publications for the AWT420 transmitter are available for free download from www abb com measurement or by scanning this cod...

Страница 2: ...s 15 2 electrode sensors 15 4 electrode sensors 15 Power supply connection 16 Fitting the EZLink modules 18 Connecting EZLink sensors 20 Long cables 20 6 Easy Setup 21 7 Calibration and sensor setup 2...

Страница 3: ...atic calibration 65 In Process calibration pH 66 Sample collection 67 Sample complete 68 Temperature calibration 69 Turbidity Total Suspended Solids TSS 70 Turbidity TSS sensor verification 71 Prepari...

Страница 4: ...rse acting control 105 Direct acting control 105 Dual acting control 106 Manual Reset proportional band offset 106 Output type 107 Analog output 107 Time proportioning output 107 Pulse frequency outpu...

Страница 5: ...ury To ensure safe use when operating this equipment the following points must be observed Up to 240 V AC may be present Be sure to isolate the supply before removing the terminal cover Safety advice...

Страница 6: ...n be hosed down if it has been installed to IP66 NEMA 4X standards i e cable glands are correctly fitted and all unused cable entry holes are blanked off see page 13 and page 12 Warm water and a mild...

Страница 7: ...sensor interface board The process reading is displayed on the main page and can be displayed as a graph in the Chart View refer to page 29 for details of view options Diagnostic messages inform the...

Страница 8: ...on providing easy access Avoid rooms containing corrosive gases or vapors for example chlorination equipment or chlorine gas cylinders Figure 2 Transmitter location Transmitter dimensions Dimensions i...

Страница 9: ...n the left and right hand mounting brackets A into the recesses on the rear of the transmitter as shown and secure with the bracket securing screws Ensure the plastic washers remain in the positions f...

Страница 10: ...he correct torque is critical to ensure proper compression of the panel seal and achieve the IP66 NEMA 4X hosedown rating 4 Holding assembly F together position bracket D into the left hand recess on...

Страница 11: ...ate holes to suit vertical or horizontal pipe secure the clamp plate to the pipe mounting bracket B using two M6 x 8 mm hexagon head screws and spring lock washers C 3 Position the pipe mounting brack...

Страница 12: ...Profibus and Ethernet communication wiring ONLY A special cable gland is supplied with the Ethernet communications option and should be used only for the Ethernet cable The use of cable glands cable...

Страница 13: ...s module PCB slot Communication module connections refer to separate supplements HART COM AWT420 HART EN MODBUS COM AWT420 MODBUS EN PROFIBUS COM AWT420 PROFIBUS EN ETHERNET COM AWT420 ETHERNET EN AC...

Страница 14: ...onductivity connections pH ORP pIon sensor module connections NOTICE ORP Redox and Antimony pH sensors do not feature temperature compensation therefore do not have temperature sensors or related wiri...

Страница 15: ...ard sensors with diagnostic functions Sensor type RTD wiring SENSE 1 GUARD 2 REF 3 S GND 4 RTD 1 5 RTD 2 6 SHIELD 7 RTD 3 8 TBX5 2 lead Blue Yellow Black Green Red White Dark green AP2xx 2 lead Clear...

Страница 16: ...ly 1 cable per cable gland Referring to Figure 11 page 17 1 Using a suitable screwdriver release door retaining screw A and open the transmitter door 2 Release terminal cover retaining screw B and rem...

Страница 17: ...420 EN REV B 17 Figure 11 Connecting the transmitter AC mains power supply A D E F G H 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 GLASS GUARD REFERENCE SOLUTION EA R TH PT PT SCREEN PT 3 rd COMMUNICATIONS Sensor...

Страница 18: ...onnector for sensor 1 passes through cable entry D b if two EZLink modules are used push fit sensor 1 module into location C and sensor 2 module into location E Note When fitting the cable assemblies...

Страница 19: ...nnector body using the flats on the alignment washer see Figure 13 9 Screw back nut J onto connector body and tighten using a spanner Figure 14 Securing the EZLink connector cable assembly Referring t...

Страница 20: ...nd push the connectors together 2 Turn nut C clockwise to secure the connectors together The transmitter detects the type of sensor connected automatically NOTICE When installing sensor extension cabl...

Страница 21: ...vised changed at any time by selecting Enter Configuration from any Operator or View page menu followed by Advanced from the Access Level menu NOTICE If Easy Setup does not detect a key press within 5...

Страница 22: ...meters may also include primary variable measurement units and measurement range The transmitter maintains a copy of these parameters as long as the sensor is connected Transmitter configuration param...

Страница 23: ...og output the output s value is not held Sensor removal is classed as a failure by the diagnostic system and this overrides the existing analog output current 2 Connect the new sensor to the same EZLi...

Страница 24: ...tputs during temporary sensor removal press the and select Manual Hold from the Operator page menu If a failure current has been configured for an analog output the output s value is not held Sensor r...

Страница 25: ...items and decrease displayed values E Group key Toggles between Operator pages 1 to 5 when an Operator page is selected with the View key View screens Diagnostics View Signals View Alarms View and Out...

Страница 26: ...g CAL shortcut D Press the key C below the CAL prompt Figure 19 Operator menus Operator menus comprise Operator Pages displays the Operator page for each available sensor Data Views displays enabled d...

Страница 27: ...H and turbidity The highest priority diagnostic or alarm is displayed Other active diagnostic alarm states can be viewed on the Diagnostics View see page 22 Figure 20 Operator Page multiple sensors 4...

Страница 28: ...fer to the sensor s Operating Instruction the bargraph flashes to indicate the value is outside the specified range When multiple sensors are fitted and Autoscroll is selected from the Operator Menu s...

Страница 29: ...View 01 O2 O3 O4 CAL 04 09 2019 08 10 11 Diagnostics View PV Failure NV Error Cal Failed Cleaning NAMUR icon and message priority see page 83 Diagnostic message View icon No Message CAL 04 09 2019 08...

Страница 30: ...shown in Table 3 The Diagnostics Log shows the history of diagnostic messages that have been displayed in the Diagnostic View see page Log entry Description Cal Failed Calibration procedure failed du...

Страница 31: ...storing Do not expose to static electricity electrical noise or magnetic fields When handling an SD card take care not to touch any exposed metal contacts Back up critical data stored on removable med...

Страница 32: ...imum permissible size a new file is created at 00 00 00 a m on the following day data is logged into the existing file continuously until the new file is created the daylight saving period starts or e...

Страница 33: ...Access level screen Level Access Logout Displayed only after Calibrate or Advanced levels are accessed Logs the user out of the current level If passwords are set a password must be entered to access...

Страница 34: ...larm hold and clean icons Alarm indicates a user defined alarm condition 20 character and flashes intermittently with an associated NAMUR diagnostic icon Hold indicates that alarms analog outputs are...

Страница 35: ...brate Level indicates that the Calibration Level parameters are enabled for the current user Read Only Level indicates that the transmitter is in Read Only mode All parameters are locked and cannot be...

Страница 36: ...of Data logging Load and save of configurations Refer to the relevant sensor manual for details of sensor setup menus Configuration of Process alarms Refer to the Calibration section page 55 for menu...

Страница 37: ...Type User Defined Set the user defined buffer characteristic curve using the five point linearizer table pH against C N A Buffer 2 Set the type value of buffer solution 2 Supported buffer solutions fr...

Страница 38: ...two 2 electrode conductivity sensors are fitted Access the Calculated Values specific setup pages refer to the Sensor setup section page Device Setup Used to access standard setup parameters Menu Comm...

Страница 39: ...t be changed see page 27 View Log Enables Select to enable disable the following Views and Logs Diagnostics View See page 29 for examples of Operator pages in View mode Enable all Signals View Chart V...

Страница 40: ...ng start hour in 1 hour increments 1 2 DS Start Occurrence Select the day within the month to start daylight saving For example to set daylight saving to start on the second Sunday of the selected mon...

Страница 41: ...imum engineering range output values within the range of measurement permitted by the sensor selected as the source Enabled Failure Current Select to enable disable the output failure function When en...

Страница 42: ...Type set to Continuous Clean on Time Recovery Time Clean Type set to Pulsed Clean on Time Clean Off Time x Number of Pulses Recovery Time N A Next Clean Set the date and time of the next scheduled cl...

Страница 43: ...ee Process alarm examples Figure 32 and Figure 33 below Time Hysteresis Set a time hysteresis trip value between 0 0000 and 9999 0 seconds If the alarm trip value is exceeded the alarm is not activate...

Страница 44: ...parameters to external media Up to 8 files can be created If a file exists in a position it is displayed as Config1 Overwrite Either overwrite the existing file or select a new position in which to sa...

Страница 45: ...lue limited to PV Range PV range low Control Type P P I P I D P D P Proportional Band Numeric value 0 1 to 999 9 100 Integral Action Time If Control Type P I or P I D Numeric value 1 to 7200 s 1 sec D...

Страница 46: ...Time If Output Type Time Proportioning Numeric value 1 0 to 300 0 s 10 sec Pulse Frequency If Output Type Pulse Frequency Numeric value 1 to 120 pulses per minute 60 pulses min Power Recovery Recovery...

Страница 47: ...Energy module This allows users wireless communication with the transmitter using the dedicated CWA mobile application The mobile application is available for both Android and iOS operating systems N...

Страница 48: ...s is fixed by the manufacturer and cannot be changed Firmware Revision The revision number of the firmware within the Bluetooth module eLabel The regulatory approval information for the Bluetooth modu...

Страница 49: ...possible causes Tx Maintenance The transmitter requires maintenance see Appendix A page 42 for possible causes Tx Function Check The transmitter requires checking see Appendix A page 42 for possible...

Страница 50: ...A Range High View the span value used in Chart and Bargraph views N A Range Low View the zero value used in Chart and Bargraph views N A Filter Type Select the signal filtering type None Low Medium Hi...

Страница 51: ...The temperature compensation characteristic TC Curve for signal A should be set to NaCl Note The temperature compensation characteristic TC Curve for signal B should be set to NH3 Difference Calculate...

Страница 52: ...numeric string 6 characters maximum for the custom user defined concentration units N A Conc Curve Table Set the user defined concentration curve using the 6 point linearizer table concentration again...

Страница 53: ...Manual Automatic Note If Temperature Sensor type Manual the temperature value is not displayed in the associated Operator page or Signals View N A Low Slope Limit A pH probe degrades over time As thi...

Страница 54: ...6 to 1114 mbar 380 to 835 mm Hg If the barometric pressure is unknown leave at the default sea level value of 1013 mbar 760 mm Hg 1013 mbar Reset To Defaults Select to reset all Sensor Setup parameter...

Страница 55: ...be configured as a Conductivity Resistivity or Concentration device the smart one point calibration routine automatically uses the same units as the measured process variable Note Access the calibrat...

Страница 56: ...to select Conductivity Cal and press the The Conductivity Cal menu is displayed 4 Confirm the displayed reading is stable and the key 5 Press the key to enter a new value the transmitter takes severa...

Страница 57: ...ductivity or concentration device the smart one point calibration routine automatically uses the same units as the measured process variable Note Access to the Calibrate menu is via Calibrate and Adva...

Страница 58: ...s the key The Conductivity Cal menu is displayed 4 Confirm the displayed reading is stable and the key 5 Press the key to enter a new value the transmitter takes several seconds to validate the calibr...

Страница 59: ...on adjusts the check and slope values Note Automatic calibrations are not available for Redox ORP measurements Temperature Cal See Temperature calibration procedure page 69 Edit Cal pH Slope Note pH s...

Страница 60: ...The calibration type is displayed 4 Use the key to edit the calibration type Use the keys to select the required calibration type and press the key to confirm selection Press the key to proceed to the...

Страница 61: ...ess the key to perform the calibration The calibration process screen is displayed On completion the result screen is displayed If the calibration passes the slope and offset values are displayed If t...

Страница 62: ...the keys to select the required calibration type and press the key to confirm selection Press the key to proceed to the next step The buffer temperature is displayed 5 Use the key to edit the buffer t...

Страница 63: ...is displayed with the reason for failure If the calibration passes the procedure moves automatically to the high buffer calibration 9 Place the sensor into buffer 2 and press the key to perform the hi...

Страница 64: ...libration type and press the key to confirm selection Press the key to proceed to the next step 5 Place the sensor into buffer 1 and press the key to perform the calibration The calibration process sc...

Страница 65: ...and press the key to confirm selection Press the key to proceed to the next step 5 Place the sensor into buffer 1 and press the key to perform the low buffer calibration The calibration process screen...

Страница 66: ...the sensor from the process to perform the calibration In this calibration mode the actual sample is used to calibrate the sensor In Process calibration is performed in two steps 1 Sample collection...

Страница 67: ...data collection The Collect Sample progress screen is displayed When the procedure is complete a confirmation screen is displayed The value of the acquisition is now stored 5 Press the key to return...

Страница 68: ...nter the value of the pH sample from the lab 6 Press the key twice 7 The Collect Sample screen is displayed with a prompt to enter a temperature value 8 Press the key and enter the value of the pH sam...

Страница 69: ...ayed 5 Use the and keys to set the temperature and press the key to confirm changes The temperature calibration process screen is displayed On completion the result screen is displayed If the calibrat...

Страница 70: ...idity TSS Sensor Verification page 71 Turbidity Cal See Turbidity calibration page 72 There are two possible calibration modes 1 point 2 point TSS Cal See TSS calibration page 76 There are two possibl...

Страница 71: ...ys to set the value and press the key to confirm changes Press the and key to proceed to the next step 5 Ensure the sensor is inserted in the verification tool and press the key to start the verificat...

Страница 72: ...er in situations where an offset was previously determined during a 2 point calibration it is possible to retain the previously measured offset during the 1 point calibration Use the key to edit the O...

Страница 73: ...tine The calibration process screen is displayed On completion the result screen is displayed If the calibration passes the new settings are displayed If the calibration fails the reason for failure i...

Страница 74: ...ey to proceed to the next step The Low Solution Value is displayed 5 Use the key to edit the solution value Use the keys to set the value and press the key to confirm changes Press the and key to proc...

Страница 75: ...on 8 Ensure the sensor is inserted in the solution and press the key to start the verification routine The calibration process screen is displayed On completion the result screen is displayed If the c...

Страница 76: ...value and press the key to confirm changes Press the and key to proceed to the next step 6 Ensure the sensor is inserted in the solution and press the key to start the verification routine The calibra...

Страница 77: ...the next step The Low Solution Value is displayed 5 Use the key to edit the solution value Use the keys to set the value and press the key to confirm changes Press the and key to proceed to the next...

Страница 78: ...essing the Abort key TSS manual calibration 1 At the Calibrate level press the key The Calibrate menu is displayed 2 Use the keys to select the sensor to be calibrated and press the key to confirm sel...

Страница 79: ...p performed Sample collection 1 At the Calibrate level press the key The Calibrate menu is displayed 2 Use the keys to select the sensor to be calibrated and press the key to confirm selection The Sam...

Страница 80: ...n needs to be reset then select Yes To retain the details of the previous calibrations then select No adaptive calibration to fine tune the existing calibration 5 Press the key to proceed to the next...

Страница 81: ...yed 4 Use the key to edit the Calibration Type Use the keys to select the required Calibration Type and press the key to confirm selection Press the and key to proceed to the next step 5 Ensure the se...

Страница 82: ...f the calibration fails the result screen is displayed with the reason for failure If the calibration passes the procedure moves automatically to the high buffer calibration 6 Ensure the sensor is sub...

Страница 83: ...e requirements and adjust if necessary Memory Write Error Transmitter configuration data is corrupt or the transmitter s non volatile memory is faulty The device setup may be affected and changes to c...

Страница 84: ...persists ensure that the sensor and the transmitter are compatible by upgrading the software on both via the bootloader 5 Check the Sensor Setup and correct if necessary see page 38 6 If Sensor Write...

Страница 85: ...has failed calibration coefficients have not been updated and the previous values continue to be applied Visually inspect sensor for signs of damage or dirt and clean if necessary Check that sensor i...

Страница 86: ...is complete S n Cal Failed The most recent sensor calibration has failed calibration coefficients have not been updated and the previous values continue to be applied Visually inspect sensor for signs...

Страница 87: ...ears intact power cycle the instrument and allow 5 minutes for the signal to settle If the Reference Failure persists then the sensor must be replaced contact local service organization S n PT Failure...

Страница 88: ...iagnostic is activated indicating that the sensor is reaching the end of its serviceable life and soon requires replacement 1 Visually inspect sensor tip for signs of damage or dirt and clean if neces...

Страница 89: ...lean and fully submerged in the solution Repeat calibration if Calibration Failed persists then consider replacing the sensor S n User Cal Expired Recalibration of the RDO sensor is required The senso...

Страница 90: ...er to the transmitter If PV Failure persists contact local service organization S n Wiper Failed The wiper has failed to wipe Sensor becomes soiled Measurement quality is affected due to inadequate cl...

Страница 91: ...easuring the amount of light scattered by the sample at 90 from the direction of illumination Excessive ambient light can interfere with this and result in inaccurate readings Shade the sensor or if p...

Страница 92: ...it hubs or EZLink connectors Security Password protection Access to configuration levels is enabled only after the user has entered a password Calibrate level user assigned password Advanced level use...

Страница 93: ...4 to 158 F Altitude 2000 m 6562 ft max above sea level Audit log and Alarm log data are stored in the same log file 2 electrode conductivity Conductivity input Measurement range and resolution Cell c...

Страница 94: ...eference temperature 25 C 77 F Configured output range Sensor group Min span Max span A 100 S cm 2000 mS cm B 10 S cm 2000 S cm pH ORP Redox pH ORP Redox input Sensor types pH Glass Antimony Sb ORP Re...

Страница 95: ...s of IEC61326 for an industrial environment Approvals certification and safety Safety approval cULus CE mark Covers EMC LV Directives including latest version IEC 61010 General safety IEC 61010 1 Poll...

Страница 96: ...reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the recei...

Страница 97: ...ues mVindication mV value indicated on the transmitter and proportional to the current output value T temperature of the solution in C after applying the factory and process calibration values Example...

Страница 98: ...ct is eliminated at conductivities approaching that of ultra pure water in order to ascertain whether a conductivity variation is due to a change in impurity level or in temperature For conductivity l...

Страница 99: ...on using only a single platinum resistance thermometer and mathematically calculating the temperature compensation required to give the correct conductivity at the reference temperature Figure 34 Ultr...

Страница 100: ...mp2 imp1 1 2 Where Gimp1 Gt1 Gupw1 Gimp2 Gt2 Gupw2 Relationship between conductivity and total dissolved solids TDS measurement The TDS factor i e the relationship between conductivity S cm 1 and TDS...

Страница 101: ...vity inputs must be configured as S cm 1 to calculate inferred pH WARNING The calculation of inferred pH relies on the strict control of chemical conditions within the NH3 NH3 NaCl or NaOH dosed sampl...

Страница 102: ...line Monitoring on AVT systems with impurities Differential conductivity can also give an indication of sample pH on AVT systems where there are low concentrations of ionic impurities present in addit...

Страница 103: ...1 3AC F 1 Where BC the before column reading AC the after column reading F molar conductivity change for the alkaline agent 243 S cm 1 per mmol l for sodium hydroxide The maximum after cation conducti...

Страница 104: ...igital outputs and pulse frequency control outputs can be assigned to any of the available relays or digital outputs Operator pages Reverse or direct acting control A Instrument tag B Sensor specific...

Страница 105: ...f Control Mode Manual is selected see Figure 37 Figure 39 Direct acting control In Configuration CAL Use the keys to toggle select SPA or Output mode Output mode enabled only if Control Mode Manual is...

Страница 106: ...int Figure 40 Dual acting control Manual Reset proportional band offset A Manual Reset value is available on Reverse or Direct acting controllers when the integral term is disabled i e Control Type is...

Страница 107: ...gned to any of the available relays or digital outputs the control output 0 to 100 is scaled linearly between 0 seconds and the configured cycle time 1 0 to 300 0 s to generate an ON period the relay...

Страница 108: ...grade spares kit Part number 3KXA877420L0011 EZLink module assemblies AWT420 EZLink PCB upgrade spares kit Part number 3KXA877420L0015 Communications module assemblies AWT420 HART PCB upgrade spares k...

Страница 109: ...Ethernet qty 1 1 2 in NPT qty 4 M16 qty 2 Ethernet qty 1 Ethernet gland qty 1 M16 Ethernet M20 1 in EZLink connector assembly Part number 3KXA877420L0066 EZLink extension cable assembly Part number De...

Страница 110: ...this document and in the subject matter and illustrations contained therein Any reproduction disclosure to third parties or utilization of its contents in whole or in parts is forbidden without prior...

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