Instruction Manual αlpha-pH2000D pH and ORP Controller/Transmitter Technology Made Easy ...
Preface This manual serves to explain the use of the αlpha-pH2000D 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 αlpha-pH2000D pH/ORP controller/transmitter.
Safety Information The 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 .......
8.10 8.11 8.12 9 ACCESSORIES......................................................................................................................................... 36 9.1 9.2 10 REPLACEMENT UNIT ........................................................................................................................... 36 ASSEMBLY ACCESSORIES ................................................................................................................... 36 GENERAL INFORMATION.........................
αlpha-pH2000D Instruction Manual 1 1.1 INTRODUCTION At the very beginning We thank you for having purchased the αlpha pH 2000D 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.
αlpha-pH2000D Instruction Manual 1.3 Safety instructions - The αlpha pH 2000D 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 αlpha pH 2000D must only be operated under the specified operating conditions (see section 8). - The αlpha pH 2000D must not be repaired by the customer.
αlpha-pH2000D Instruction Manual 2 2.1 PRODUCT DESCRIPTION Description of unit The αlpha pH 2000D is used for measuring pH and temperature values. The pH values can be measured using industrial differential & combination pH sensors. The temperature values can be measured using 2-wire / 3-wire Pt100 / Pt1000 sensors or NTC300 thermistor. The transmitter is available in a wall mounting enclosure.
αlpha-pH2000D Instruction Manual 2.2 Measurement and control system A typical measurement system consists of: • A pH/ORP process controller • A pH/ORP combination electrode with integrated or separate temperature sensor Pt100/Pt1000 or NTC300 thermistor.
αlpha-pH2000D Instruction Manual 2.
αlpha-pH2000D Instruction Manual 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 READY MEAS CAL mV pH % HOLD Mode indicators: MEAS: measurement mode SETUP: Set-up mode CAL: Calibration mode ERR O O C F pH ATC Status indicator: READY: Visible after successful calibration HOLD: Unit in “HOLD” mode ATC: Visible in ATC (Automatic Temperature Compensation) mode.
αlpha-pH2000D Instruction Manual 2.3.3 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.
αlpha-pH2000D Instruction Manual 2.3.5 Menu overview MEAS PH °C CAL ENTER ENT 1 2 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 ENT ENTER ENT SETUP HOLD OFS ENT Offset setting see section 6.2 SETUP HOLD SETUP HOLD SETUP HOLD SETUP ENT ENT HOLD SETUP HOLD SETUP Relay B (set point 2) settings see section 6.4 ENT Controller settings see section 6.
αlpha-pH2000D Instruction Manual 3 ASSEMBLY AND INSTALLATION 3.1 Mounting the unit Wall mounting version 111.50 [4.39] 144 [5.67] ] 7 6 5 [ 4 4 1 27.5 [1.08] . ]5 5 [ 4 1 xo p p a . . r For Pg13.5 cable glands 24 [.94] 39 [1.54] Pg13.5 (3 pcs.) 78 [3.07] 57.8[2.28] 80 [3.15] ]2 6 2 [ 5 6 6 ] 5 8 [ 5 1 2 Holes for post mounting (4X) . . . Holes for wall mounting (2X) . ] 4 5 3 [ 0 9 6 [.24] . Unit: MM [INCH] 90 [3.
αlpha-pH2000D Instruction Manual 3.2 Connection Diagram Caution: Ensure electrical mains are disconnected before proceeding.
αlpha-pH2000D Instruction Manual NOTE: a) Switch or circuit breaker shall be included in the building installation. b) It shall be in close proximity to the equipment and within easy reach of the operator. c) It shall be marked as the disconnecting device for the equipment.
αlpha-pH2000D Instruction Manual 4 4.1 NORMAL OPERATION Measurement mode When the controller/transmitter is powered on, the display first shows all segments briefly, after which the controller/transmitter automatically enters into the Measurement mode. Please note: To guarantee accurate readings the measuring system (transmitter and sensor) must be calibrated. MEAS pH O C The mode indicator “MEAS” at the top of the display indicates that the transmitter is in Measurement mode.
αlpha-pH2000D Instruction Manual 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 be accessed via the Setup mode (see section 6.1). 5.1 Entering Calibration mode MEAS PH C O CAL ENTER ENTER ENTER SETUP HOLD SETUP ENTER HOLD pH calibration see section 5.2 ORP-mV calibration see section 5.3 ORP-% calibration see section 5.4 1.
αlpha-pH2000D Instruction Manual 5.2 pH Calibration If the unit of measure is in pH (default), then the calibration is also carried out in pH. This transmitter features a one-point or two-point calibration for pH with five preset buffer sets. Buffer values refer to 25 oC. A standard pH buffer solution that matches one of these values is required to calibrate the instrument.
αlpha-pH2000D Instruction Manual Note: If there is a calibration error, the controller displays “CAL ERR”. If this happens, push both ▲ and ▼ keys (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.
αlpha-pH2000D Instruction Manual 5.3 ORP-mV Calibration If controller is configured for ORP-mV measuring you can perform a one-point calibration. CAL mV CAL HOLD CAL 255 HOLD 255 mV MEAS 250 250 255 R.mV 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-mV readings. 2. Place sensor in the ORP solution. 3. Press the ENT key to start calibration.
αlpha-pH2000D Instruction Manual Note: If there is a calibration error, the controller displays “CAL ERR”. If this happens, push both ▲ or ▼ keys (escape) to restart the calibration beginning from Step 1. Note: If you stop calibration after entering the first value, or if calibration is defective, the controller will use its original calibration data. 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.
αlpha-pH2000D Instruction Manual 6 SETUP MODE 6.1 Enter Setup mode In the Setup mode the transmitter can be configured to your individual requirements. MEAS 1. While in Measurement mode press the ENT key. pH 2. The display prompts you to enter the security code. Set the security code with ▲ or ▼ key to: O C ENTER ENT − “SCD 22” if you want to change parameter settings − “SCD 000” if you want to view only parameter settings (view only mode) ENTER ENT 3. Press the ENT key.
αlpha-pH2000D Instruction Manual 6.2 Electrode Offset (OFS) sub-function The electrode offset sub-function is only available if the transmitter 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 transmitter will add or subtract the offset value from the measuring pH and display the corrected value.
αlpha-pH2000D Instruction Manual 6.3 Setting temperature (Set °C°F) sub-function 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 SETUP HOLD HOLD ENT ENT HOLD O F ENT O C O C 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 ENTER key to confirm your selection. 3.
αlpha-pH2000D Instruction Manual 6.4 Control Relay A / 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 ENT SETUP pH SETUP ENT HOLD 4 ENT HOLD SETUP pH HOLD ENT 3 SETUP hi HOLD ENT 6 5 SETUP HOLD ENT SETUP HOLD ENT 1.
αlpha-pH2000D Instruction Manual 5. Setting the on-delay time lag: press the ▲ or ▼ key to enter the on-delay time for set point 1 (set point 2). The controller will delay activation of the relay for the number of seconds (0 to 2000 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 2000 seconds time delay before your relay activates.
αlpha-pH2000D Instruction Manual 6.5 Controller (CNTR) sub-function The CNTR sub-function determines the controller’s parameters.
αlpha-pH2000D Instruction Manual 1. Select the “CNTR” sub function, then press the ENT key. 2. Selecting the controller type: press the ▲ or ▼ key to select the suitable controller type: − 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).
αlpha-pH2000D Instruction Manual − If the proportional controller type is set to pulse frequency control (PFC): 9. Selecting the relay status under Non-Alarm condition: press the ▲ or ▼ key to choose the desired relay status (de-energized = “DEEN” or energized = “EN”). Press the ENT key to confirm your selection. 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.
αlpha-pH2000D Instruction Manual 6.6 Current Output 1 sub-function In this sub-function you set the current output range of the transmitter for pH or ORP values. 1 SETUP SETUP cur.1 HOLD 3 2 SETUP ENT ENT HOLD HOLD 2 SETUP HOLD 4 pH ENT SETUP ENT HOLD 3 ENT 5 pH SETUP ENT ENT HOLD 5 4 pH HOLD SETUP SETUP SETUP pH HOLD HOLD ENT 1. Select the “CUR.1” sub-function, and then press the ENT key. 2.
αlpha-pH2000D Instruction Manual 6.7 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 SETUP ENT 4 SETUP SETUP ENT HOLD SETUP ENT HOLD 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.
αlpha-pH2000D Instruction Manual 6.8 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 SETUP ENT HOLD HOLD HOLD SETUP 5 ENT SETUP ENT HOLD 3 SETUP HOLD ENT 2 SETUP ENT HOLD off 1. Select the “WASH” sub-function, and 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.
αlpha-pH2000D Instruction Manual 6.9 Configuration (CNFG) sub-function In this sub-function you configure the transmitter to suit your requirements. 1 SETUP HOLD 4 3 2 ENT SETUP ENT SETUP ENT HOLD 5 SETUP SETUP ENT ENT HOLD HOLD HOLD SY 4 SETUP 2 mV HOLD SETUP ENT ENT HOLD SY 4 SETUP % HOLD ENT SY 7 6 ENT SETUP ENT SETUP HOLD HOLD 7 ENT SETUP 6 HOLD SETUP MEAS pH HOLD ENT 7 O SETUP ENT C HOLD 1. Select the “CNFG” sub-function, and then press the ENT key. 2.
αlpha-pH2000D Instruction Manual 6. Selecting the alarm contact type: press the ▲ or ▼ key to select the alarm contact type: − “STDY” = steady contact − “FLET” = fleeting (single pulse) contact Press the ENT key to confirm your selection. Note: With this parameter you select whether the alarm contact will operate as a steady contact or a fleeting (single pulse) contact. Pulse contact closing time is 1 second. 7. Resetting the transmitter settings to factory defaults: The display shows “NO DEF”.
αlpha-pH2000D Instruction Manual 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 transmitter’s set point values activate the relays. In Manual mode, you can manually turn “on” and “off” the control devices connected to the relays. 7.1 View relay set points To view relay set points, the relay mode must be set to automatic (standard mode after switchon, relay mode LED “Auto” lights).
αlpha-pH2000D Instruction Manual 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.
αlpha-pH2000D Instruction Manual 8 8.1 TECHNICAL SPECIFICATIONS General Specification (a) pH pH Measuring Range Resolution Accuracy (b) mV mV Measuring Range Resolution Accuracy (b) mV percentage Percentage mV Measuring Range Resolution Accuracy (c) Temperature Temperature measuring range Resolution Relative accuracy Sensor Compensation 8.2 -2.00 to 16.00 pH 0.01 pH ± 0.01 pH -1000 to 1000 mV 1 mV ± 1 mV 0 to 100% (for -100 to 100 mV) 0.1% ± 0.2 % (or ± 1 mV) -10.0 to +125.0 oC or +14.0 to +257.
αlpha-pH2000D Instruction Manual (c) (1) Pulse Length Control (PLC) Pulse Length (c) (2) Pulse Frequency Control (PFC) Pulse Frequency Contact Outputs Switching Voltage / Current / Power 8.
αlpha-pH2000D Instruction Manual 8.7 Display LCD Back light 8.8 Power Supply Input Main Fuse Pollution Degree Transient Voltage Category Connector 8.
αlpha-pH2000D Instruction Manual 9 9.1 ACCESSORIES Replacement Unit Product Description αlpha pH 2000 Controller / Transmitter, wall mount version 9.
αlpha-pH2000D Instruction Manual 10 GENERAL INFORMATION 10.1 Warranty Eutech Instruments/Oakton Instruments warrant this product to be free from significant deviations in material and workmanship for a period of one year from the date of purchase. If repair is necessary and not the result of abuse or misuse within the warranty period, please return by freight pre-paid and amendment will be made without any charge. Eutech Instruments/Oakton Instruments Customer Service Dept.
αlpha-pH2000D Instruction Manual 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 NTC 300 / Pt 100 / Pt 1000 temperature sensor, make sure the mains cable is separated from the power supply. View from both PCBA side Alpha pH/DO2000W New Main Rev 0.2 Jumper J11, J12 &J16 (on main board) Factory setting: NPC300 Fuse 250V, 315 mA, Time Delay 0.2 Alpha pH/DO20000W New Main Rev 0.2 part No.
αlpha-pH2000D Instruction Manual 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. Temperature (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.
αlpha-pH2000D Instruction Manual 11.3 Appendix 3 – Simple explanation on the function of hysteresis SP1 Set to LO SP2 Set to HI RELAY ON RELAY OFF 4.0 4.5 7.0 SP1 9.5 10.0 SP2 FORWARD DIRECTION REVERSE DIRECTION HYSTERESIS BAND (DEFAULT = 0.5 pH) 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.
αlpha-pH2000D Instruction Manual 11.4 Appendix 4 – General instructions concerning Controller Setting 11.4.1 Control characteristic of Controllers used as limit value switch MIN function 100% MAX function Yh 50% 0% -Xw +Xw SP 1 SP 2 Xp = 0 Xp = 0 11.4.2 Control characteristic of P-Controllers as proportional controller MIN function 100% MAX function Yh 50% 0% -Xw +Xw Xp Xp Prop. band Prop. band SP 2 SP 1 11.4.
αlpha-pH2000D Instruction Manual 11.4.4 Control signal of Pulse length Controllers Relay Pulse Length T tON tOFF ON 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.
αlpha-pH2000D Instruction Manual 11.4.5 Control 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 250 msec. 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.
αlpha-pH2000D Instruction Manual 11.5 Appendix 5 – Abbreviations used in menu displays Abbreviation Meaning Abbreviation Meaning MEAS Measurement CUR. 1 Output current 1 CAL Calibration CUR. 2 Output current 2 ENT Enter OUT Output signal OFS Offset 4 - 20 4 to 20mA C. CD Calibration security code 0 - 20 0 to 20 mA S. CD Setup security code R.0 Value at 0 mA SET Setting R. 4 Value at 4 mA ATC Automatic temperature calibration R.
For more information on Eutech Instruments’ products, contact your nearest distributor or visit our website listed below: Eutech Instruments Pte Ltd. Blk 55, Ayer Rajah Crescent, #04-16/24 Singapore 139949 Tel: (65) 6778 6876 Fax: (65) 6773 0836 E-mail: marketing@eutechinst.com Web-site: www.eutechinst.
