User guide im/4690–en rev. A 4690 series turbidity systems accurate, reliable turbidity measurement introduction an abb turbidity system comprises a 4690 / 4695 analyzer and a 7998 turbidity sensor. The analyzer provides the operator interface and communications to other devices. The signal from the...
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4690 series turbidity systems contents im/4690–en rev. A 1 contents 1 safety ............................................................................... 2 1.1 electrical safety ........................................................ 2 1.2 symbols ...................................................
4690 series turbidity systems 1 safety 2 im/4690–en rev. A 1 safety information in this manual is intended only to assist our customers in the efficient operation of our equipment. Use of this manual for any other purpose is specifically prohibited and its contents are not to be reproduced in full o...
4690 series turbidity systems 2 turbidity systems im/4690–en rev. A 3 2 turbidity systems 2.1 7998 sensors details of the individual sensors are shown in table 2.1. 2.2 turbidity measurement systems sensor no. Principle of sensor type of sensor minimum range maximum range 7998 001 (epa 180.1) incand...
4690 series turbidity systems 2 turbidity systems 4 im/4690–en rev. A fig. 2.2 turbidity sensors – main components flow chamber optical emitter wiper unit optical receiver drain valve inlet/isolating valve with optional wiper unit optical emitter optical receiver drain valve inlet/isolating valve fl...
4690 series turbidity systems 3 installation im/4690–en rev. A 5 3 installation 3.1 siting requirements 3.1.1 analyzer 3.1.2 turbidity sensor to enable the turbidity sensor to be removed easily for maintenance, ensure an all-round clearance of 200 mm (7.9 in) – see section 3.3, page 8 for the overal...
4690 series turbidity systems 3 installation 6 im/4690–en rev. A 3.2 mounting the analyzer 3.2.1 wall-mounting referring to fig. 3.3: a mark fixing centers (see fig. 3.2). B drill suitable holes. C secure analyzer to wall using suitable fixings. 3.2.2 pipe-mounting referring to fig. 3.5: a position ...
4690 series turbidity systems 3 installation im/4690–en rev. A 7 3.2.3 panel-mounting referring to fig. 3.5: a cut a hole in the panel (see fig. 3.6 for dimensions). Analyzers may be close stacked to din 43835. B loosen the retaining screw on each panel clamp. C remove the panel clamp and anchors fr...
4690 series turbidity systems 3 installation 8 im/4690–en rev. A 3.3 mounting the turbidity sensor systems and sensors are shown in table 2.1 on page 3. The main components of each sensor are identified in fig. 2.2 on page 4. Referring to figs 3.8 or 3.9: 1. Mount the sensor in the orientation shown...
4690 series turbidity systems 3 installation im/4690–en rev. A 9 3.3.1 sample flowrate set a minimum flowrate of 0.5 l min -1 to prevent solids settling in the pipework. Increase the flowrate if necessary but do not exceed the maximum flow rate of 1.5 l min -1 . When measuring turbidity, it is impor...
4690 series turbidity systems 3 installation 10 im/4690–en rev. A 3.4 installing the optional de-bubbler 3.4.1 mounting the de-bubbler note. The de-bubbler must be mounted vertically with the flow upwards. Dimensions in mm (in) fig. 3.11 de-bubbler mounting information (debubbler part number 7997 50...
4690 series turbidity systems 3 installation im/4690–en rev. A 11 3.4.2 set up procedure for de-bubbler with a system that includes a de-bubbler, referring to fig. 3.12: 1. Open the 'sample in' isolating valve a such that the overflow from the de-bubbler is at a minimum. 2. Adjust the sample flow th...
4690 series turbidity systems 4 electrical connections 12 im/4690–en rev. A 4 electrical connections 4.1 access to terminals 4.1.1 wall- / pipe-mount analyzer referring to fig. 4.1: a slide cover down, pull out slightly and slide it off. B release captive screws. C remove protection cover. 4.1.2 pan...
4690 series turbidity systems 4 electrical connections im/4690–en rev. A 13 4.2 safety information 4.2.1 relay contact protection and interference suppression if the relays are used to switch loads on and off, the relay contacts can become eroded due to arcing. Arcing also generates radio frequency ...
4690 s e rie s turbidity systems 4 electrical connections 14 im/4690–en rev. A 4.3 connections 4.3.1 wall- / pipe-mount analyzer connections mounting terminal number wall 1 2 3 4 5 6 7 panel 12 11 10 9 8 7 6 cleaner initiate pulse +12 v switched emitter supply +12 v cleaner / receiver supply signal ...
4690 series turbidity systems 4 electrical connections im/4690–en rev. A 15 4.3.2 panel-mount analyzer connections note. Refer to fig. 4.2, page 12 for access to terminals. Slacken terminal screws fully before making connections. Fig. 4.5 panel-mount analyzer connections note. 1. A second retransmis...
4690 series turbidity systems 4 electrical connections 16 im/4690–en rev. A 4.4 selecting the mains voltage 4.4.1 wall- / pipe-mount analyzer referring to fig. 4.6: a slide cover down, pull out slightly and slide it off. B release 4 captive screws. C remove protection cover. D remove 2 screw caps (i...
4690 series turbidity systems 4 electrical connections im/4690–en rev. A 17 4.5 turbidity sensor connections fig. 4.8 turbidity sensor junction box connections emitter receiver wiper unit (optional) blue red green yellow screen screen red green blue screen white black blue red green yellow to 4690 /...
4690 series turbidity systems 5 controls and display 18 im/4690–en rev. A 5 controls and display 5.1 display the display comprises a 5-digit, 7-segment digital upper display line and a 16-character dot-matrix lower display line. The upper display line shows actual values of turbidity, temperature, a...
4690 series turbidity systems 6 operation im/4690–en rev. A 19 6 operation 6.1 analyzer start-up ensure all electrical connections have been made and switch on the power supply. If the system is being commissioned for the first time, calibration (refer to section 7, page 20) and parameter programmin...
4690 series turbidity systems 7 calibration 20 im/4690–en rev. A 7 calibration a key feature of the 4690 series turbidity system is the dry secondary calibration standard. This is designed to simplify routine calibration verification and minimizes the need for chemical standards. Each dry calibratio...
4690 series turbidity systems 7 calibration im/4690–en rev. A 21 to minimize deterioration of the secondary standard: carefully wipe off any residual moisture after use. Clean the prism with lint-free cloth. Avoid direct contact with the dry standard rod – fingerprints on the surface may alter its s...
4690 series turbidity systems 7 calibration 22 im/4690–en rev. A 8. Remove the dry standard, rotate it through 180° and refit it, ensuring that the ntu value indication (see figs 7.2 or 7.3) faces the receiver and the locating lug engages correctly – see fig. 7.4. 9. Note the reading on the display....
4690 series turbidity systems 7 calibration im/4690–en rev. A 23 fig. 7.5 dry calibration standard for low range sensors fig. 7.6 dry calibration standard for high range sensors n u s t a n d. N u ntu value indication zero ntu indication s t a n d. N u s t a n d. N u ntu value indication zero ntu in...
4690 series turbidity systems 7 calibration 24 im/4690–en rev. A 7. Calibrate the sensor as follows: sensor calibration press to advance to next page or press to advance to next parameter. Calibration security code enter the required calibration code number, between 00000 and 19999. If an incorrect ...
4690 series turbidity systems 7 calibration im/4690–en rev. A 25 continued from previous page fill span solution 1. Remove the dry standard and place it in its storage container. Note. Do not touch the light reflecting parts of the standard. 2. Fill the flow chamber with the formazine span solution ...
4690 series turbidity systems 8 configuration and electrical calibration 26 im/4690–en rev. A 8 configuration and electrical calibration 8.1 access to configuration pages a 5-digit security code is used to prevent unauthorized access to the configuration pages. 8.2 language page security code enter ...
4690 series turbidity systems 8 configuration and electrical calibration im/4690–en rev. A 27 8.3 set up parameter page set up parameter press to advance to next page or press to advance to next parameter. Sensor type using the and keys, select the required sensor: 7998-001 7998–002 7998–006 7998–00...
4690 series turbidity systems 8 configuration and electrical calibration 28 im/4690–en rev. A continued from previous page cleaning interval note. Displayed only if sensor type is set to 7998-001, 7998-002, 7998-011 or 7998-012 using the and keys, select the cleaning interval required. Values availa...
4690 series turbidity systems 8 configuration and electrical calibration im/4690–en rev. A 29 8.4 set up outputs page set up outputs press to advance to next page or press to advance to next parameter. Alarm 1 action for 'fail-safe' alarm operation the relay's alarm state must be the same as the pow...
4690 series turbidity systems 8 configuration and electrical calibration 30 im/4690–en rev. A continued from previous page hold outputs during calibration select yes to hold the retransmission and alarm outputs to prevent inadvertent operation during calibration. Test retransmission output the analy...
4690 series turbidity systems 8 configuration and electrical calibration im/4690–en rev. A 31 8.5 set up serial interface page serial interface press to advance to next page or press to advance to next parameter. Baud rate using the and keys, select the baud rate required from 1200, 2400, 4800 or 96...
4690 series turbidity systems 8 configuration and electrical calibration 32 im/4690–en rev. A 8.6 electrical calibration 8.6.1 equipment required 1. Millivolt source: 0 to 4000 mv. 2. Digital milliammeter (current output measurement): 0 to 20 ma. 8.6.2 preparation 1. Isolate the analyzer and turbidi...
4690 series turbidity systems 8 configuration and electrical calibration im/4690–en rev. A 33 8.6.3 electrical calibration page in this section the actual values denoted by ' xxxxx' are unimportant and are used only to determine display reading stability when carrying out the electrical calibration ...
4690 series turbidity systems 9 maintenance 34 im/4690–en rev. A 9 maintenance the servicing schedule in table 9.1 is a guide only. Because the turbidity systems are designed for a wide range of applications, where the nature of the sample can vary considerably, it may be necessary to amend the sche...
4690 series turbidity systems 10 fault finding im/4690–en rev. A 35 10 fault finding 10.1 error messages if erroneous or unexpected results are obtained, the fault may be indicated by an error message – see table 10.1. The majority of problems are overcome by thorough cleaning of the flowcell optica...
4690 series turbidity systems 10 fault finding 36 im/4690–en rev. A 10.2 unstable or erratic readings there are a number of possible causes of unstable or erratic readings. Check for air bubbles in the sample. This may be due to degassing of the sample, caused by either a drop in sample pressure or ...
4690 series turbidity systems 11 specification im/4690–en rev. A 37 11 specification sensor range low range 0 to 40 ntu high range 0 to 400 ntu measurement principle 90 ° scattered light measurement. Compliant to epa 180.1 or iso7027 maximum linearity typically accuracy 1, 2 low range version ±2 % o...
4690 series turbidity systems 11 specification 38 im/4690–en rev. A analyzer measured value 5-digit x 7-segment backlit lcd information 16-character, single line, dot matrix, backlit lcd units of measurement all models: ntu and fnu mg/l and ppm for models high range models accuracy ±0.2 % of reading...
4690 series turbidity systems 12 spares and consumables im/4690–en rev. A 39 12 spares and consumables 12.1 maintenance kits 12.2 accessories 12.3 upgrade kits 12.4 strategic spares part number description kit contents 7998023 wiper blade pack 4 x 7997203 7998044 replacement led kit (iso infrared le...
4690 series turbidity systems 12 spares and consumables 40 im/4690–en rev. A 12.5 software 12.6 de-bubbler part number description kit contents 7998040 7998 turbidity eprom (basic) 1 x 46803000 basic 7998041 7998 turbidity eprom (second retransmission) 1 x 46803001 2nd retrans 7998042 7998 turbidity...
45.17 3.374 15.00 0.0 serial interface baud rate 9600 inst. Identity 99 parity none 5.0 sen.Type7998-001 7998-002 7998-006 7998-007 7998-011 7998-012 7998-017 7997-400 unidades (ntu) (fnu) (mg/l) (ppm) (ftu) (fau) 400 13 clean int. (hr) start operating page (page 19) calibration page (page 24) secur...
Contact us im/4690–en rev . A 07.20 12 products and customer support automation systems for the following industries: — chemical & pharmaceutical — food & beverage — manufacturing — metals and minerals — oil, gas & petrochemical — pulp and paper drives and motors — ac and dc drives, ac and dc machin...
