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

le00100a0600p_05



BKI 11 ATEX 0012 X

1.2.2.

Characteristics of an ideal ORP electrode



Negative voltage output in liquids with reduction potential,



Positive voltage output in liquids with oxidation potential,



Output voltage is equal to the redox potential (according to the Nernst equation)



pH independent measurement with certain types

To achieve reliable measurement and accuracy, these electrodes have to be thoroughly checked before
installation and during usage from time to time. The time interval between two calibrations depends on the
application and conditions where the ORP probes are used.

1.2.3.

Characteristics of an ideal DO sensor

The dissolved oxygen level indicates the amount (in mg/l or ppm) of physically dissolved gas-form oxygen in
liquid phase.
Oxygen-permeable membrane amperometric DC sensor wetted in the measurement medium gives output

current proportional to the dissolved oxygen concentration of the medium.

i

air

i

zero

O

ut

pu

t c

urre

nt

of

th

e DO se

nsor

Dissolved oxygen (DO), ppm

sat´n

0

Slope =

/ppm oxygen

Output current of the

DO sensor

The ideal DO sensor has:



I

zero

=0,



Temperature independent output current

Real DO sensor gives off a minimal I

zero

≠

0ppm current in case of 0 ppm dissolved oxygen concentration and its oxygen-permeable capability is temperature-

dependent. Oxygen-permeable capability of the membrane is increasing according to the increase of the temperature, at 25 °C it can be 4%/°C. Temperature
proportional correction is necessary for reliable measurement.

The DO sensors in deed are not ideal (their properties depend on the design of the electrode, manufacturing tolerances and most of all the age of the electrode),
so the parameters differ from the given values above. To give reliable DO measurement and accuracy these electrodes must be calibrated from time to time. In
case of DO sensors the calibration means that 0 ppm output value have to be set by offsetting in an oxygen-free solution. For DO measurement of other
mediums (for example dry air 20.95%@25°C or oxygen-saturated water) adjustment of slope (nA/ppm) has to done accurately according to the properties of
these mediums.

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Содержание AnaCONT LE-100

Страница 1: ...0p_05 1 60 AnaCONT Manufacturer Phone 36 1 36 1 E mail sales nivelco com www nivelco com H 1043 Budapest Dugonics u 11 889 0100 Fax 889 0200 NIVELCO Process Control Co LE 100 LP 100 LG 100 Two wire co...

Страница 2: ...2 60 le00100a0600p_05 BKI 11 ATEX 0012 X pH and ORP Dissolved oxygen sensors and transmitters compact type pH and ORP Dissolved oxygen sensors and transmitters integrated type...

Страница 3: ...L D INSTRUMENTS 22 3 4 ACCESSORIES 22 4 MAINTENANCE AND REAPAIR 23 4 1 STORAGE 23 4 2 PERIODIC SETTING CALIBRATION AND VERIFICATION 23 4 2 1 Periodic calibration of the pH electrode 24 4 2 2 Verificat...

Страница 4: ...output 45 6 4 4 Digital output 47 6 4 5 Service functions 47 6 5 PH SENSOR CALIBRATION 53 6 5 1 Editing one item of the calibration table 53 6 5 2 Adding an item to the calibration table 55 6 5 3 Del...

Страница 5: ...alue composes the basis of all output signals of the instrument 1 2 1 Characteristics of an ideal pH electrode The pH electrode immersed into the measured liquid measures a voltage value which is prop...

Страница 6: ...of the DO sensor Dissolved oxygen DO ppm sat n 0 Slope ppm oxygen Output current of the DO sensor The ideal DO sensor has Izero 0 Temperature independent output current Real DO sensor gives off a min...

Страница 7: ...ntegrated P DO D NPT 1 PP 4 4 20 mA Ex 6 NPT 1 PVDF 5 4 20 mA HART Ex 8 4 20 mA Relay R 4 20 mA HART Realy H PH PROBE CODE ORP PROBE CODE DO PROBE CODE 4xpher112seph 1 4xorrherpseor 1 4x085g0023ydo 20...

Страница 8: ...otection tube is available only for L P or L R instruments EXTENSIONS L A 0 TYPE CODE MATERIAL CODE CODE LENGTH L CODE Pipe R PP 1 0 0 m 0 m 0 Cable K PVDF 2 1 1 m 0 1 m 1 Suspended pipe F 2 2 m 0 2 m...

Страница 9: ...PP 4 DN150 PN16 PP 5 DN200 PN16 PP 6 Console mounting bracket 200 mm K Mounting bracket 200 mm T SLIDING SLEEVE WITH FLANGE LAA 10 0 DN80 DN200 63 DO pH ORP CONSOLE MOUNTING BRACKET LAA 10K 0 MOUNTING...

Страница 10: ...ZE SENSOR PROTECTION TUBE L A P 1 PP 1 1 0 0 2 PVDF 2 2 PROTECTION TUBE 1 LAP 10 0 FOR EXTENSION TYPE PROTECTION TUBE 2 LAP 20 0 FOR BASIC TYPE BSP1 1 2 130 51 55 51 BSP1 1 2 112 BSP 2 Sensor protecti...

Страница 11: ...E LAP 20 0 INTEGRATED STANDARD TYPE ANACONT LP SENSOR PROTECTION TUBE LAP 20 0 BSP1 1 2 120 160 90 120 200 95 BSP1 1 2 Further configuration drawings show only compact types however many accessories a...

Страница 12: ...TECTION TUBE LAP 20 0 STANDARD TYPE ANACONT L PIPE EXTENSION LAR 0 SENSOR PROTECTION TUBE LAP 10 0 90 BSP1 1 2 10 pH ORP 112 BSP2 BSP1 1 2 DO 160 120 52 90 108 As per order codes BSP 1 120 pH ORP DO 1...

Страница 13: ...SENSOR PROTECTION TUBE LAP 10 0 STANDARD TYPE ANACONT L PIPE EXTENSION LAR 0 CONSOLE MOUNTING BRACKET LAA 10K 0 SENSOR PROTECTION TUBE LAP 10 0 52 As per order codes BSP 1 120 DO 51 90 108 10 pH ORP...

Страница 14: ...DARD TYPE ANACONT L CABLE EXTENSION LAK 0 SUSPENDED PIPE EXTENSION LAF 0 SENSOR PROTECTION TUBE LAP 10 0 98 BSP 1 120 pH ORP DO 10 112 BSP2 BSP1 1 2 90 175 As per order codes 120 DO 90 175 As per orde...

Страница 15: ...0 STANDARD TYPE ANACONT L CABLE EXTENSION LAK 0 SUSPENDED PIPE EXTENSION LAF 0 CONSOLE MOUNTING BRACKET LAA 10K 0 SENSOR PROTECTION TUBE LAP 10 0 52 As per order codes BSP 1 120 pH ORP DO 10 90 175 As...

Страница 16: ...anic isolation input impedance 1012 ohm connection SN6 With DO probe Galvanic isolated current input 0 725V polarisation voltage connection SN6 Liquid potential complementary electrode Stainless steel...

Страница 17: ...e measurement range 1 digit 0 01 C Linearity 0 05ppm Resolution 0 01ppm internal resolution 0 005ppm Measuring cycle 300msec on display 1sec Depends on the selected electrode sensor SPECIAL DATA FOR E...

Страница 18: ...m sterilization water with low conductivity sudden temperature changes Steam sterilization water with low conductivity sudden temperature changes Steam sterilization water with low conductivity sudden...

Страница 19: ...se Ceramic 3 mol KCl Ceramic polycarbonate Connection insertion length mm SN6 PG13 5 120 SN6 PG13 5 120 Main application areas Swimming pools drinking water process water slightly contaminated wastewa...

Страница 20: ...Ceramic Connection insertion length mm SN6 PG13 5 120 SN6 PG13 5 120 SN6 PG13 5 120 Main application areas public and industrial wastewater process water drinking water water in chemical industry wate...

Страница 21: ...0 Main application areas swimming pools drinking water slightly polluted water slightly polluted water drinking water process water swimming pools metallization chemical applications swimming pools dr...

Страница 22: ...rge aquariums Controlling of oxygen concentration in water plants determination of biological condition in surface water Potable water production river monitoring water treatment sites controlling of...

Страница 23: ...ge Prominent ships the electrodes hydrated in a well sealed container with a 3mol l KCl solution in it As a result the membrane remains wet and the electrode is in ready to use state It is important t...

Страница 24: ...pH4 50 ml 4vpuf4ph250ph Buffer solution pH4 250 ml 4vpuf4ph100ph Buffer solution pH4 1 l 4vpuf7ph50mph Buffer solution pH7 50 ml 4vpuf7ph250ph Buffer solution pH7 250 ml 4vpuf7ph100ph Buffer solution...

Страница 25: ...es refer to 25 C The temperature dependency is given by the manufacturer usually in a table on the label of the bottle 4 2 3 Periodic calibration of the DO sensor The calibration has to be done minimu...

Страница 26: ...he same in both cases Automatic calibration on air The sensor should be simply hold in water saturated air The instrument measures the output current of the DO sensor then store the measured value if...

Страница 27: ...ps below size 17 Re hydration If the electrode was desiccated due to incorrect use or storage it needs to be re hydrated This has to be done by soaking the electrode in 3mol l KCl storage solution at...

Страница 28: ...soft rag Soak the electrode for 15 mins in 0 1 mol l thiourea and 1 5 mol l 5 hydrochloric acid HCl Rinse the electrode again with warm water then dry up gently using a soft rag Soak the electrode fo...

Страница 29: ...on guides 9 5 0 0 5 s 17mm 4 4 MAINTENANCE OF THE DO SENSOR During this operation be careful not to expose the fragile electrode to mechanical forces Do not scratch finger or touch the membrane of the...

Страница 30: ...process is under pressure in this case user should take care of depressurization first 5 1 1 Installation of pH and ORP electrodes Prior to mounting into the process the instrument should be put into...

Страница 31: ...ect the contacts against short circuit even if water is infliltrated With one hand hold the instrument upwards with its sensor with other hand remove the right threaded protector basket of the sensor...

Страница 32: ...at before and after the fitting piece there is a straight pipe with the appropriate length to minimalize sedimentation and turbulency The influent section has to have min 10xDN length while the efflue...

Страница 33: ...and tighten by hand Don t use any tool After tightening the enclosure can be rotated to the proper position Safety bolt prevents rotation more than 350 5 1 3 Special application possibilities of the...

Страница 34: ...e with 0 5 1 5 mm2 cross section Connect shielding to grounding by the inner or outer grounding screw first Switch on the unit After switching of the unit necessary programming can be done After the w...

Страница 35: ...EPH network should be R 2 ohm measured from the neutral To avoid disturbing noises keep away of closeness to high voltage cables Especially critical can be the inductive couplings of harmonics which a...

Страница 36: ...ogramming is supported by a text based menu Navigation is done by using the E buttons The instrument can operate without the SAP 300 module as well Programming can be done only by using SAP 300 displa...

Страница 37: ...internal sensor After the dimension the temperature compensation mode is indicated by inverse inscription Any possible errors during measurement are shown in the lower part of the display Manual mode...

Страница 38: ...nt is programmed see 6 4 2 4 B Output range 4 20mA indicated in a bargraph C Relay state indication if deenergized C1 closed C2 open there is no indication If RELAY message is visible the relay is ene...

Страница 39: ...PRESSURE and salinity SALINITY 3 Relay information number of switchings total energised time C2 closed only if there is a relay in the unit The informative display switches back to main screen after 3...

Страница 40: ...e programming is not possible at the same time use only one programming method at a time Measured values can be read out through HART at any time 6 3 1 Components of the programming interface The para...

Страница 41: ...The software checks if the entered value is appropriate exiting the edit window is only possible after entering a correct value If the entered value is uninterpretable the software sends an error mess...

Страница 42: ...mbered primary value indicates the oxygen saturation 6 4 1 2 Damping time Parameter P20 Menu path BASIC SETUP DAMPING TIME Default value pH measurement ORP measurement DO measurement Description Dampi...

Страница 43: ...rrection in ppt parts per thousand 0 ppt 6 4 1 7 Pressure correction unit Only for DO measurement Parameter P02 c Menu path BASIC SETUP PRESSURE CORRECTION UNIT Default value Hgmm Description Dimensio...

Страница 44: ...ameter P10 Menu path OUTPUT SETUP ANALOG OUTPUT 4mA VALUE Default value pH measurement ORP measurement DO measurement Description Measured value assigned to 4mA 0 pH 1000 mV 0 ppm 6 4 2 3 Output curre...

Страница 45: ...ff C1 closed C2 open PH ORP DO Relay operation assigned to the measured pH ORP DO value TEMP Relay operation assigned to the measured temperature ON ERROR Relay operates on critical errors 6 4 3 2 Rel...

Страница 46: ...OUTPUT SETUP RELAY OUTPUT DEENERGIZED VALUE DEN Default value pH measurement ORP measurement DO measurement Description Value of the relay when it become deenergised at C1 closed C2 open 14 pH 1000 mV...

Страница 47: ...ill be fixed at 4mA The fixed 4mA output can be overwritten as described in chapter 6 4 2 5 6 4 5 Service functions 6 4 5 1 Security codes User security code Parameter Menu path SERVICE SECURITY USER...

Страница 48: ...ion Used for the testing of the relay output Pressing the and buttons the relay will change state When in this menu point the programmed relay operation is not taken into consideration DEENERGIZED Rel...

Страница 49: ...u by pressing the NO button In the next dialogue the software asks the user if the calibration of the sensor is the first calibration after a new sensor is installed or not Select OK or NO buttons If...

Страница 50: ...t according to the lower range value of pH ORP simulation TRIANGLE WAVE The simulated value changes linearly between the set low and high values with an adjustable cycle time PV Primary Value SQUARE W...

Страница 51: ...user to check the outputs and the additional processing instruments connected to the output To start simulation the instrument must return to Measuring mode Temperature simulation mode Parameter P84...

Страница 52: ...ription Highest value of the temperature simulation 50 C 6 4 5 9 Load default values Parameter Menu path SERVICE DEFAULTS LOAD DEFAULT Default value Description This command loads all default values o...

Страница 53: ...sensor can be checked see chapter 6 2 The calibration can be performed within 0 8 pH sensor error When this error is greater then 0 8 pH the unit shows a warning message that the sensor should be rep...

Страница 54: ...value is stable or not When the value is stored in the SENSOR VALUE field a READY message appears on the bottom of the display The measured value can be copied to the stored SENSOR VALUE by pressing t...

Страница 55: ...ly using a soft rag 3 Immerse the electrode as well as the temperature sensor into the buffer solution 4 Select one existing line of the calibration table or add a new item to the table 5 In the BUFFE...

Страница 56: ...to default We should press NO button in case it is not the first calibration 6 6 1 Calibration of saturated value 100 SERVICE SENSOR CALIBRATION CAL IN AIR SPAN Rinse the DO sensor with distilled wate...

Страница 57: ...t In this case basic settings atmospheric pressure temperature should be the same Rinse the DO sensor with distilled water then dry up gently using a soft rag Immerse the sensor into saturated referen...

Страница 58: ...START menu or power off and on the instrument and check repeat programming If the problem persists contact the service 17 INTEGRITY ERROR Incorrect parameter values Stored parameters are damaged Resta...

Страница 59: ...ELAY OUTPUT SERIAL OUTPUT ANALOG OUTPUT CURRENT MODE 4 mA VALUE 20 mA VALUE ERROR MODE MANUAL VALUE CURRENT MODE AUTO MANUAL 4 mA VALUE ERROR MODE HOLD 3 8 mA 22 mA MANUAL VALUE ADDRESS SERIAL OUTPUT...

Страница 60: ...N MODE TIME BOTTOM VALUE UPPER VALUE MODE OFF MANUAL VALUE TRIANGLE WAVE SQUARE WAVE TIME BOTTOM VALUE UPPER VALUE LOAD DEFAULT CLEAR TIMERS TEMP SIMULATION MODE TIME BOTTOM VALUE UPPER VALUE MODE OFF...

Страница 61: ...ERVICE LOCK USER LOCK SERVICE LOCK OUTPUT TEST KIMENETI TESZT ANALOG OUTPUT RELAY OUTPUT SERIAL OUTPUT SERIAL OUTPUT 1200Hz 2200Hz CURRENT VALUE SENSOR SETUP CALIBRATION VIEW EDIT TABLE ADD ITEM DELET...

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