Instruction Manual Alpha pH 2000 pH/ORP Controller Transmitter pH / mV / ºC meter 68X216830 | Rev 3 | Apr 2008
Preface This manual serves to explain the use of the Alpha pH 2000 series pH/ORP controller/transmitter. The manual functions in two ways, firstly as a step by step guide to help the user operate the instrument. Secondly, it serves as a handy reference guide. This instruction manual is written to cover as many anticipated applications of the Alpha pH 2000 pH/ORP controller/transmitter.
Safety Information The Alpha pH 2000 Controller/ Transmitter shall be installed and operated only in the manner specified in the Instruction manual. Only skilled, trained or authorized person should carry out installation, setup and operation of the instrument. Before powering up the unit, make sure that power source it is connected to, is as specified in the top label. Failure to do so may result in a permanent damage to the unit. The unit has live and exposed parts inside.
TABLE OF CONTENTS 1 INTRODUCTION ............................................................................................................................ 1 1.1 1.2 1.3 1.4 2 AT THE VERY BEGINNING............................................................................................................. 1 INTENDED USE ........................................................................................................................... 1 SAFETY INSTRUCTIONS .......................................
10.3 10.4 10.5 11 RETURN OF GOODS ................................................................................................................. 39 GUIDELINES FOR RETURNING UNIT FOR REPAIR ......................................................................... 40 MAINTENANCE AND CLEANING .................................................................................................. 40 APPENDICES ........................................................................................................
1 INTRODUCTION 1.1 At the very beginning We thank you for having purchased the Alpha pH 2000 pH/ORP Controller. The construction of the pH/ORP Controller employs leading edge technology and complies with safety regulations currently in force. Notwithstanding this, improper use could lead to hazards for the user or a third-party, and/or adverse effects on the plant or other equipment.
1.3 Safety instructions − The Alpha pH 2000 should be installed and operated only by personnel familiar with the transmitter and who are qualified for such work. − A defective controller must neither be installed nor put into service. − The Alpha pH 2000 must only be operated under the specified operating conditions (see section 8). − The Alpha pH 2000 must not be repaired by the customer.
2 PRODUCT DESCRIPTION 2.1 Description of unit The Alpha pH 2000 is used for measuring pH or ORP and temperature values. The pH or ORP values can be measured using proportional or limit control. The controller is available in two versions, one for panel mounting and one for wall mounting in an enclosure. The controller can be used for applications such as water treatment and monitoring, galvanicdecontamination, chemical processing, food processing, clean or wastewater control and neutralization processes.
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2.3.1 Display overview The LC display shows two alpha-numerical fields for parameters and measured values as well as various mode and status indicators. SETUP MEAS ready CAL Mode indicators: mv PH% – MEAS: Measurement mode HOLD – SETUP: Set-up mode – CAL: Calibration mode err Status indicators: O Cf O ph atc s – READY: Visible calibration after successful – HOLD: Unit in “HOLD” mode – ATC: Visible in ATC (Automatic Temperature Compensation) mode.
LED indicators Relay indicators If REL key is pressed the LED (A, B or W) indicates to which Relay (A, B or Wash) the displayed limit values refer. Relay mode indicators Auto LED lights if relay operation is set to automatic mode. Manu LED lights if relay operation is set to manual mode. Relay status indicators This LED lights if limit value is exceeded or the ATC probe fails. This LED lights green if measured value is within the limit for Relay A or lights red if measured value exceeds limit.
Menu overview MEAS PH O C CAL *CCD “000”= Check calibration parameters (View only mode) CCD “11” = Calibration mode ** SCD “000” = Check setup parameters (View only mode) SCD “22” = Setup mode ENTER SETUP HOLD SETUP Temperature settings see section 6.3 HOLD SETUP Relay A (set point 1) settings see section 6.4 HOLD SETUP Relay B (set point 2) settings see section 6.4 HOLD SETUP Controller settings see section 6.5 HOLD SETUP Current output 1 settings see section 6.6 cur.
3 ASSEMBLY AND INSTALLATION 3.1 Mounting the unit Wall Mounting Version 111.50 [4.39] 144 [5.67] approx. 14 [.55] 144 [5.67] 27.5 [1.08] 39 [1.54] 78 [3.07] For Pg13.5 cable glands 24 [.94] Pg13.5 (3 pcs.) 57.8[2.28] Holes for post mounting (4X) 21.5 [.85] Holes for wall mounting (2X) 90 [3.54] 66.5 [2.62] 80 [3.15] 6 [.24] Unit: MM [INCH] 90 [3.
Panel mounting version Flat gasket 1mm [.
3.2 Connection Diagram Caution: Ensure electrical mains are disconnected before proceeding. Connection for wall mounting version pH/ mV RE LA PT100/ PT1000 12 29 + 28 - 31 + 30 20 19 22 24 25 26 27 11 RELB 10 WASH RE LAY 9 8 ALAR M R ELAY 7 4 5 6 13 3 2 1 HOLD E N L 14 - Current Current GND +12V OP 2 OP1 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
NOTE: Switch or circuit breaker shall included in the building installation. It shall be in close proximity to the equipment and within easy reach of the operator. It shall be marked as the disconnecting device for the equipment.
Connection for panel mounting version 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. AC mains live wire AC mains neutral wire AC mains protective earth wire Alarm relay (NO) Alarm relay common Alarm relay (NC) Wash relay Wash relay Relay B (SP 2) Relay B (SP 2) Relay A (SP 1) Relay A (SP 1) Hold function Hold function no connection no connection 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29 30. 31.
4 NORMAL OPERATION 4.1 Measurement mode When the controller is powered on, the display first shows all segments briefly, then the transmitter automatically enters into the Measurement mode. Please note: To guarantee accurate readings the measuring system (controller and sensor) must be calibrated. MEAS PH O C The mode indicator “MEAS” at the top of the display indicates that the controller is in Measurement mode.
5 CALIBRATION MODE You can access the Calibration mode directly from the Measurement mode by pressing the CAL key and entering the Calibration security code “11”. Calibration mode may also access via the Setup mode (see section 6.1). 5.1 Entering Calibration mode MEAS PH C O CAL ENTER ENTER ENTER SETUP HOLD SETUP HOLD ENTER pH calibration see section 5.2 ORP-mV calibration see section 5.3 ORP-% calibration see section 5.4 1.
5.2 pH Calibration This controller unit features one-point or two-point calibration with five preset buffer sets. Buffer values refer to 25 °C. To calibrate the instrument, you need a standard pH buffer solution that matches one of these values. two-point calibration SETUP HOLD CAL CAL PH HOLD PH MEAS CAL PH HOLD C O PH PH PH CAL atc CAL one-point calibration 1. Enter Calibration mode as described in section 5.1. The display should read “CAL PH” (for pH calibration).
7. Press the ENT key to return to the Measurement mode. Note: If you entered the Calibration mode from the Setup mode, the controller will return to the setup menu. Note: If there is a calibration error the transmitter displays “ERR”. In this case, press the ▲ and ▼ keys simultaneously (escape) to restart the calibration beginning from step 1. Note: When calibrating with manual temperature compensation, the controller automatically changes from the preset process temperature to the calibration temperature.
5.4 ORP -% Calibration If controller is configured for ORP-% measuring you can perform a calibration at two points using a low concentration sample (20%) and a high concentration sample (80%). To calibrate the controller for ORP %: SETUP HOLD meas CAL CAL % 59.0 HOLD HOLD CAL CAL 1. Enter Calibration mode as described in section 5.1. The display should read “CAL ORP”. Note: If the display reads “CAL PH”, see section 6.9 for procedures on how to switch from pH to ORP-% readings. 2.
5.5 View actual zero and slope MEAS PH C O atc CAL ENT CAL ENT PH 1. While in Measurement mode press the CAL key. The display will prompt you to enter a security code. Leave the security code at “000” (view only mode). 2. Press the ENT key. The display shows the slope in mV (upper value) and the pH reading at 0 mV (zero point, lower value). Note: If no key is pressed for 30 seconds the transmitter automatically returns to the Measurement mode. 3.
6 SET-UP MODE 6.1 Enter Setup mode In the Setup mode the controller can be configured to your individual requirements. 1. While in Measurement mode press the ENT key. MEAS P 2. The display prompts you to enter the security H code. Set the security code with ▲ or ▼ key to: O C –“SCD22” if you want to change parameter settings ENTER ENT –“SCD000” if you want to view only parameter settings (view only mode) 3. Press the ENT key.
6.2 Electrode Offset (OFS) sub-function The electrode offset sub-function is only available if the controller is configured for pH measuring. Use this sub-function to set an offset that corrects the readings without removing the electrode from the control system. The setting range is ±120 mV. The controller will add or subtract the offset value from the measured pH and display the corrected value.
Setting temperature (Set oC) sub-function 6.3 3 1 SETUP HOLD SETUP ENT ENT HOLD 4 SETUP ENT 5 SETUP ENT HOLD HOLD SETUP ENT HOLD O C 2 6 3 SETUP SETUP HOLD HOLD O SETUP ENT ENT C O ENT HOLD C O atc 1. Select the “SET °C°F” sub-function, then press the ENT key. 2. Selecting temperature unit: press the ▲ or ▼ key to select the desired temperature unit “°C” or “°F”. Press the ENT key to confirm your selection. 3.
6.4 Control Relay A/Control Relay B (SP1/SP2) sub-function The SP1 sub-function determines the operating parameters for Relay A; while SP2 defines the operating parameters for Relay B. Since these groups have the same set-up parameters, they are described together. HOLD 3 2 1 SETUP SETUP ENT PH SETUP ENT HOLD 4 ENT HOLD SETUP HOLD ENT 3 SETUP hi HOLD ENT 6 5 SETUP HOLD ENT SETUP ENT HOLD 1. Select the “SP1” (Relay A) or “SP2” (Relay B) sub-function, then press the ENT key. 2.
the relay for the number of seconds (0 to 1999 seconds) you select. Press the ENT key to confirm your setting. Note: You can set a time delay for each relay, which stops the relay from switching on the moment the set point is exceeded. This controller lets you set a 0 to 1999 second time delay before your relay activates. 6. Setting the off-delay time lag: press the ▲ or ▼ key to enter the offdelay time for set point 1 (set point 2).
6.5 Controller (CNTR) sub-function The CNTR sub-function determines the controller’s parameters. 2 1 SETUP ENT HOLD SETUP HOLD off ENT 3 2 SETUP HOLD l.ct ENT SETUP ENT HOLD 3 SETUP HOLD 4 2 SETUP HOLD p/pI ENT ENT SETUP plc HOLD 5 ENT SETUP HOLD 5 SETUP HOLD 9 4 SETUP HOLD pfc ENT SETUP ENT HOLD 9 SETUP HOLD 6 SETUP ENT HOLD 7 HOLD 10 SETUP HOLD ENT SETUP 8 HOLD 12 11 ENT ENT SETUP ENT SETUP HOLD SETUP ENT HOLD 1.
- OFF = controller off Use control Off to operate controller as a monitor only or to prevent relays from switching. - L.CT = limit value control (on/off control). Use limit control with pumps or values for fast response - P/PI = proportional/integral control Use proportional control to operate your pumps smoothly or for precise control of proportioning valves. Use PI controller to eliminate steady state error. Note: please refer to Appendix 4 for detailed information on controller settings.
10. Setting the proportional range: press the ▲ or ▼ key to set the proportional range (setting range: 10 to 500%). Press the ENT key to confirm your setting. 11. Setting the pulse frequency: press the ▲ or ▼ key to set the pulse frequency (setting range: 60 to 120 pulses per minute). Press the ENT key to confirm your setting. 12. Setting the integral action time: press the ▲ or ▼ key to set the integral action time (setting range: 0.0 to 999.9 minutes). Press the ENT key to confirm your setting.
Current Output 2 sub-function In this sub-function you set the current output range of the transmitter for temperature values. cur.2 HOLD 3 2 1 SE TUP 4 SETUP SETUP ENT ENT HOLD ENT HOLD SETUP ENT HOLD o c 2 SETUP o c 3 ENT HOLD 4 SETUP ENT HOLD SETUP HOLD c o c o ENT 1. Select the “CUR.2” sub-function, then press the ENT key. 2. Selecting the output type: press the ▲ or ▼ key to select the desired output type: 0-20 mA or 4-20 mA.
6.7 Wash relay (WASH) sub-function In this sub-function you set the parameters for the wash relay. 2 1 SETUP HOLD ENT SETUP 4 3 ENT HOLD SETUP ENT HOLD SETUP HOLD 5 ENT SETUP ENT HOLD 3 SETUP HOLD ENT 2 SETUP ENT HOLD off 1. Select the “WASH” sub-function, then press the ENT key. 2. Enabling/disabling wash function: press the ▲ or ▼ key to enable (WASH ON) or disable (WASH OFF) wash function. Press the ENT key to confirm your selection. 3.
6.8 Configuration (CNFG) sub-function In this sub-function you configure the controller to suit your requirements.
– “PH SY” = pH measurement with symmetrical input – “PH ASY” = pH measurement with asymmetrical input – “ORP % SY” = ORP-% measurement with symmetrical input – “ORP % ASY” = ORP-% measurement with asymmetrical input – “ORP mV SY” = ORP-mV measurement with symmetrical input – “ORP mV ASY” = ORP-mV measurement with asymmetrical input Press the ENT key to confirm your selection. 5. Setting the alarm delay time in seconds: press the ▲ or ▼ key to set the alarm delay time (setting range: 0 to 1999 seconds).
8. Resetting the controller settings to factory defaults: The display shows “NO DEF”. Press the ▲ or ▼ key to select: – “NO DEF” = keeps old values active, when confirmed with ENT. – “FCT DEF” = resets all settings to factory defaults, when confirmed with ENT. – “CAL DEF” = resets calibration settings to factory defaults, when confirmed with ENT. Press the ENT key. The selected function will be executed and the controller returns automatically to the Measurement mode.
7 RELAY MODES You can control devices connected to Relay A, Relay B or wash relay via the front panel of the transmitter. In Automatic mode, the controller’s set point values activate the relays. In Manual mode, you can manually turn “on” and “off” the control devices connected to relay A or relay B. 7.1 View relay set points To view relay setpoints, the relay mode must be set to automatic (standard mode after switch-on, relay mode LED “Auto” lights). While in Measurement mode press the REL key.
7.2 Manual relay mode In manual relay mode, you can manually turn “on” and “off” the control devices connected to Relay A, Relay B or Wash relay. 1. While in Measurement mode press the MODE key. 2. The display prompts you to enter the security code. Press the ▲ or ▼ key to set security code to “22”. 3. Press the ENT key. The Manual relay mode is activated and the relay mode LED “MANU” lights.
8 TECHNICAL SPECIFICATIONS 8.1 General Specification Alpha pH 2000 Controller / Transmitter pH Range -2.00 to 16.00 pH Resolution & Accuracy 0.01 pH & ± 0.01 pH mV Range 0 to 100% or -1000 to 1000 mV Resolution & Accuracy 0.1% or 1 mV / ± 1 mV Temperature -9.9 to 125 oC (15.0 to 257.0 oF) Resolution & Accuracy 0.1 & ± 0.5 oC (± 1.
EMC Specifications Emitted Interference Immunity to Interference Environmental Conditions Ambient Temp. Operating Range Rel. Humidity EN 61 326 EN 61 326 -10 to 50 oC (14 to 122 oF) 10 to 95% (non-condensing) Power Supply Input Main Fuse Pollution Degree Transient Overvoltage category 8.
8.3 Specifications for panel mount version Electrical Data And Connections Signal output Two 0/4 to 20 mA outputs for pH/mv and temperature , galvanically isolated Load Max.600 Ω pH / ORP Input BNC (1012 Impedance) Connection terminal (1 x 3-pin; 1 x 9-pin & 1 x 19-pin terminal blocks) Mechanical Specifications Dimensions Weight Material Insulation 175 x 96 x 96 mm ( 6.89 x 3.78 x3.
9 ACCESSORIES 9.1 Replacement Unit Product Description Alpha pH 2000 pH/ORP Controller/Transmitter, wall mount version Alpha pH 2000 pH/ORP Controller/Transmitter, panel mount version Product Description Alpha pH 2000 pH/ORP Controller/Transmitter, wall mount version Alpha pH 2000 pH/ORP Controller/Transmitter, panel mount version 9.
10 10.1 GENERAL INFORMATION Warranty This Controller transmitter is supplied with a one-year warranty against significant deviations in material and workmanship from date of purchase and a six-month warranty for probe. Each instrument will have a warranty card with a specific serial number. The warranty card must be endorsed by the Authorized Distributor at the point of sale.
10.4 Guidelines for Returning Unit for Repair Use the original packaging material if possible when shipping the unit for repair. Otherwise wrap it with bubble pack and use a corrugated box for additional protection. Include a brief description of any faults suspected for the convenience of Customer Service Dept., if possible. 10.5 Maintenance and Cleaning Maintenance The Alpha pH 2000 contains no user repairable components.
11 APPENDICES 11.1 Appendix 1 – Unit fuse and jumper settings − Caution! Before opening the unit to replace the unit fuse or to set the jumper for Pt 100 / Pt 1000 temperature sensor, make sure the mains cable is separated from the power supply.
Panel mounting version RE G6 C56 C65 F1 + U6 C34 + J3 R43 C41 + C40 R39 Q3 C38 Fuse: 250V, 250mA, Antisurge 42 R41 C116 R103 R 102 R104 C120 C118 C 108 R99 R 95 C112 C111 R 97 C121 R 106 R105 C63 C39 + C37 R42 C48 Z2 R107 REG3 D11 C36 C53 REG4 REG2 + C54 + R94 D10 C57 + R40 R47 C64 C61 + + + R46 RE G1 R48 + C49 TS13 C69 R49 C58 R45 C73 + C62 TS1 RE G5 RE G7 C70 + C123 C72 C71 REG8 + + + C43 C42 84X277401 MA IN ALPHA pH1100 RE V 0.
11.2 Appendix 2 – pH buffer values at various temperatures The following table shows the various pH values at different temperature of the solution during calibration. Tempera ture (oC) 0 5 10 15 20 25 30 35 40 45 50 55 60 70 80 90 pH 1.00 pH 4.01 pH 6.86 pH 7.00 pH 9.00 pH 9.18 pH 10.01 0.96 0.99 0.99 0.99 1.00 1.01 1.01 1.01 1.01 1.01 1.01 1.01 1.02 1.02 1.02 1.02 4.01 4.01 4.00 4.00 4.00 4.01 4.01 4.02 4.03 4.04 4.06 4.08 4.10 4.12 4.16 4.20 6.98 6.95 6.92 6.90 6.88 6.86 6.85 6.84 6.84 6.83 6.83 6.
11.3 Appendix 3 –Simple explanation on the function of hysterisis SP1 Set to LO SP2 Set to HI RELAY ON RELAY OFF 4.0 4.5 7.0 SP1 FORWARD DIRECTION 9.5 10.0 SP2 HYSTERESIS BAND (DEFAULT = 0.5 pH) REVERSE DIRECTION 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.
11.4 Appendix 4 – General instructions concerning Controller Setting 11.4.1 Control characteristic of Controllers used as limit value switch MAX Function MIN Function Yh 100 % 50 % 0% - Xw + Xw SP 1 Xp = 0 SP 2 Xp = 0 11.4.2 Control characteristic of P-Controller as proportional controller MIN Function MAX Function Yh 100 % 50 % 0% - Xw + Xw Xp Xp Prop. Band SP 1 Prop. Band SP 2 11.4.
11.4.4 Controller signal of Pulse length Controllers Relay Pulse Length T ON tON tOFF OFF Time [s] The output relay of the pulse length controller is clock-timed. The switching period T remains constant. Depending on the divergence from the limit value, the switch-on time tON is increased or decreased in accordance with the proportional range Xp. The following applies: tON + tOFF = T (Const.
11.4.5 Controller signal of Pulse Frequency Controllers Relay Pulse Length T tON tOFF ON OFF Time [s] The output relay of the pulse frequency controller is clock-timed. The pulse duration tON remains constant at 250mS. Depending on the divergence from the limit value, the frequency (1/T) is increased or decreased in accordance with the proportional range Xp. The following applies: tON = Const. (250 msec.) greater divergence Î greater f (greater frequency) Xp exceeded Î max.
11.5 Appendix 5 – Abbreviations used in menu displays Abbreviation MEAS CAL ENT OFS C.CD S.CD SET ATC Abbreviation CUR.1 CUR.2 OUT 4 - 20 0 - 20 R.0 R. 4 R. 20 Meaning Output current 1 Output current 2 Output signal 4 to 20mA 0 to 20 mA Value at 0 mA Value at 4 mA Value at 20 mA SP1 Meaning Measurement Calibration Enter Offset Calibration Security Code Setup Security Code Setting Automatic Temperature Compensation Setpoint 1 CU22 SP2 LO HI Setpoint 2 Low limit Hi Limit WASH H. INT S. DUR HYS ON.
For more information on our products, contact your nearest distributor or visit our website listed below: Thermo Scientific Oakton Instruments Water Analysis P.O Box 5136, Environmental Instruments Vernon Hills, IL 60061, USA Blk 55, Ayer Rajah Crescent, Tel (in U.S.): 888-462-5866 #04-16/24 Singapore 139949 Tel (outside U.S.): 1-847-549-7600 Tel: (65) 6778 6876 Fax: (1) 847-247-2984 Fax: (65) 6773 0836 E-mail: info@4oakton.com E-mail: eutech@thermofisher.com Web-site: http://www.4oakton.
