2.  lpha-2000 Series Process Controllers u  lpha pH/ORP 2000 u  lpha CON 2000 u  lpha DO 2000 Eutech Instruments

3. FEATURES of  lpha2000 Series ASIC-based with intelligence and flexibility - matrix format programming ASIC-based with intelligence and flexibility - matrix format programming User-selectable functions that can be customized to suit one’s requirements User-selectable functions that can be customized to suit one’s requirements On-line push-button calibration On-line push-button calibration Built-in non-volatile memory backup Built-in non-volatile memory backup

4. FEATURES of  lpha2000 Series Multi-level password protection - avoid unauthorized tampering of the system Multi-level password protection - avoid unauthorized tampering of the system Auto/Manual selection for control function Auto/Manual selection for control function HOLD function HOLD function Proportional and Proportional Integral Control - Pulse length/Frequency Proportional and Proportional Integral Control - Pulse length/Frequency

5. PROPORTIONAL VS PROPORTIONAL INTEGRAL PROPORTIONAL VS PROPORTIONAL INTEGRAL + - ERROR SIGNAL AMPLIFIERPROCESS + - ERROR SIGNAL AMPLIFIER SUMMING + + INTEGRATOR OUTPUT PROCESS OUTPUT SETTING FEED BACK

6. PI CONTROL - ERROR CORRECTION PI Control P Control

7. FEATURES of  lpha2000 Series 14 segment LCD display 14 segment LCD display Backlit ‘Transflective’ LCD Backlit ‘Transflective’ LCD Two current outputs Two current outputs Choice of 0/20 or 4/20 mA Choice of 0/20 or 4/20 mA 22mA for ‘Out of Range’ condition 22mA for ‘Out of Range’ condition Push-button display of set points Push-button display of set points

8. FEATURES of  lpha2000 Series Zoomable transmitter output Zoomable transmitter output Galvanically isolated signal output Galvanically isolated signal output Isolated 12V/50mA DC output Isolated 12V/50mA DC output On/Off delay time for Set point relays On/Off delay time for Set point relays Set point Relay state programmable Set point Relay state programmable

9. FEATURES of  lpha2000 Series Hi/Lo feature for set-points Hi/Lo feature for set-points 4 Relays, 2 for Setpoints, Alarm and Wash 4 Relays, 2 for Setpoints, Alarm and Wash On-delay for Alarm relay On-delay for Alarm relay Hysteresis band -- prevent signal overshoot from false triggering & on/off continuously Hysteresis band -- prevent signal overshoot from false triggering & on/off continuously

10. The controller relay activates when the set point is reached. In the reverse direction, it does not de-activate when the value reaches the set point. Instead, it continues to be active till the value reaches the amount set by the Hysteresis band. HYSTERESIS 4 4.5 7 9.5 10 SP1 SP2 RELAY ON FORWARD DIRECTION REVERSE DIRECTION HYSTERESIS BAND ( DEFAULT 0.5 pH ) SP1 Set to LO SP2 set to HI RELAY OFF

11. FEATURES of  lpha2000 Series Choice of Pt100 or Pt1000 Choice of Pt100 or Pt1000 Temperature in Centigrade or Fahrenheit Temperature in Centigrade or Fahrenheit Two wire or three wire system Two wire or three wire system Choice of ATC or MTC -- independent Temp setting for Process and Calibration Choice of ATC or MTC -- independent Temp setting for Process and Calibration Switched Mode power supply Switched Mode power supply

12. FEATURES of  lpha2000 Series 80 to 250 V AC/DC auto detect 80 to 250 V AC/DC auto detect Detachable back panel connectors Detachable back panel connectors Standard 144x144mm front panel Standard 144x144mm front panel Protection against EMI with CE mark endorsed Protection against EMI with CE mark endorsed IP 65/NEMA 4X rated field mount housing – W series IP 65/NEMA 4X rated field mount housing – W series

13. FEATURES of  lpha-pH2000 Series pH/ORP mode of operation, both in one controller pH/ORP mode of operation, both in one controller ORP mV or ORP % mode of operation ORP mV or ORP % mode of operation Symmetrical or Asymmetrical input Symmetrical or Asymmetrical input Choice of use with Glass or Antimony electrode Choice of use with Glass or Antimony electrode

14. FEATURES of  lpha-pH2000 Series Auto buffer recognition - choice of 7 buffers Auto buffer recognition - choice of 7 buffers One point Cal choice of 7.00 or 6.86 pH One point Cal choice of 7.00 or 6.86 pH Electrode status display after calibration Electrode status display after calibration On line offset adjustment for pH and Temp On line offset adjustment for pH and Temp

15. CHARACTERISTIC CURVE OF CONTROLLER SP1 X p = 0 SP2 X p =0 100% 50% 100% 50% Prop. Band X p LIMIT CONTROLLER PROPORTIONAL CONTROLLER

16. FEATURES of  lpha-CON2000 2 cell or 4 cell operation 2 cell or 4 cell operation Wide range up to 1000 mS/cm Wide range up to 1000 mS/cm User selectable – 7 ranges User selectable – 7 ranges Cell constant input for automatic correction Cell constant input for automatic correction Cell constant from 0.005 to 9.999 Cell constant from 0.005 to 9.999

17. FEATURES of  lpha-DO2000 mg/l, ppm or % saturation mode of operation mg/l, ppm or % saturation mode of operation Extended range 0 to 300%, 0 to 25 mg/l Extended range 0 to 300%, 0 to 25 mg/l Pressure compensation for the % sat. mode Pressure compensation for the % sat. mode Auto calibration in the % saturation mode Auto calibration in the % saturation mode Choice of two cells: 0-10 or 0.5 - 40 ppm Choice of two cells: 0-10 or 0.5 - 40 ppm Pressure input in mmHg and Kpa Pressure input in mmHg and Kpa

18. Differential pH Measurements

19. Combined Electrode Pair Conventional Technique E1 E2 E1 E2 E1- E2 100 MEG pH Glass Electrode pH Reference Electrode

20. Conventional Construction pH Reference Electrode pH Glass Electrode E1E2 E1 E2 E1- E2 100 MEG

21. Pitfalls of Conventional pH Plugging junction Poisoning of the internal element Rapid electrolyte depletion Ground loops

22. Technique Comparison Combination Electrode Combination Electrode Differential Electrodes Differential Electrodes Preamplifier

23. Benefits of Differential pH Reduced cost of ownership Reduced cost of ownership Long life with glass reference electrode Long life with glass reference electrode –Replaceable quad junction salt bridge –Buffered electrolyte (typically 7pH) Long sensor to analyzer distances without coax Long sensor to analyzer distances without coax Low impedance reduces noise pickup Low impedance reduces noise pickup Ground rod eliminates ground loops Ground rod eliminates ground loops Adjustable isopotential point Adjustable isopotential point

24. Reference Solutions 7 pH Buffer Reference solution when using pH glass Reference solution when using pH glass 0.05 Molar Potassium Phosphate, pH adjusted with NaOH 0.05 Molar Potassium Phosphate, pH adjusted with NaOH Reference Electrode Solution Reference solution when using silver/silver chloride wire Reference solution when using silver/silver chloride wire 4 Molar KCL with AgCL 4 Molar KCL with AgCL Differential pH Reference Standard Combination pH Reference

25. Differential Technique E 1 - E 3 -(E 2 - E 3 ) (E 1 - E 2 ) Solution Ground Electrode (E 3 ) Temperature Compensator Reference Electrode (E 2 ) Process Electrode (E 1 ) Preamplifier

26. Differential pH at its Best

27. Differential pH measurement Differential pH measurement Two protected pH glass electrodes Two protected pH glass electrodes Ground rod Ground rod –Accurate temperature measurement –Up to 1000 foot cable Very large reference chamber Very large reference chamber –Replaceable solution –Volume resists contamination –Any reference from 2 pH to 10 pH Long-lasting salt bridge Long-lasting salt bridge –Quad junction –Replaceable –Smooth surfaces reduce fouling.

28. Low profile pH glass Smooth surfaces reduce chance of fouling Replaceable quad junction salt bridge Ground rod 1.5 Inch NPT threads Short 6-inch body Six wrench flats Huge internal reference chamber

29. Easy Replacement O-Ring sealed Quad Junction Seals in sanitary fittings

30. Cutaway Reference Electrode Active Electrode Amplifier Reference Buffer Quad Junction Bridge Ground Rod O-ring seals

31. pH Sensor Care Dehydration Dehydration Detrimental factors to electrode life Detrimental factors to electrode life –Abrasion –Coating –Temperature Shock Transportation Transportation Storage Storage

32. pH Sensor Cleaning

33. Competition GLI (Patent 3,709,796 and 3,862,895) GLI (Patent 3,709,796 and 3,862,895) Rosemount Rosemount E + H E + H ATI ATI Aquametrics Aquametrics

34. Instumentation ? Alpha pH 2000D