Thermo Scientific ALPHA DO 2000 PPG Manual Download Page 33 | Manualshive

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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 switch-on, relay
mode LED “Auto” lights).

While in Measurement mode press the REL key

.

pH

The display shows the set point value for Relay A and LED “A” lights.

pH

2

After two seconds the display shows the set point value for Relay B and
LED “B” lights).

After two seconds the display shows the status of the Wash relay and LED
“W” lights. If Wash relay is “off” the display shows “WASH OFF”. If Wash
relay is “on” the wash interval time and wash duration is displayed.

After an additional two seconds the transmitter will return to Measurement
mode.

off

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Summary of Contents for ALPHA DO 2000 PPG

Page 1: ...Alpha DO 2000 PPG Processor Transmitter Dissolved Oxygen ppm m L ...

Page 2: ...ed applications of the Alpha pH2000D pH ORP controller transmitter If you have doubts in the use of the instrument please do not hesitate to contact the nearest Alpha Authorised Distributor The information presented in this manual is subject to change without notice as improvements are made and does not represent a commitment on part of Thermo Scientific Thermo Scientific cannot accept any respons...

Page 3: ...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 If it has to be opened make sure that the power to the unit is off and disconnected The unit is Fuse protected In the event the fuse has to be replaced use only those as specified in the manual The degree of protection against ele...

Page 4: ...FSET OFS SUB FUNCTION 17 6 3 SETTING TEMPERATURE SET C F SUB FUNCTION 18 6 4 CONTROL RELAY A RELAY B SP1 SP2 SUB FUNCTION 19 6 5 CONTROLLER CNTR SUB FUNCTION 21 6 6 CURRENT OUTPUT 1 SUB FUNCTION 23 6 7 CURRENT OUTPUT 2 SUB FUNCTION 24 6 8 WASH RELAY WASH SUB FUNCTION 25 6 9 CONFIGURATION CNFG SUB FUNCTION 26 6 10 CALIBRATION CAL SUB FUNCTION 27 7 RELAY MODES 28 7 1 VIEW RELAY SET POINTS 28 7 2 MAN...

Page 5: ...3 SIMPLE EXPLANATION ON THE FUNCTION OF HYSTERESIS 37 11 4 APPENDIX 4 GENERAL INSTRUCTIONS CONCERNING CONTROLLER SETTING 38 11 4 1 Control characteristic of Controllers used as limit value switch 38 11 4 2 Control characteristic of P Controllers as proportional controller 38 11 4 3 Control characteristic of PI Controllers as proportional integral controller 38 11 4 4 Control signal of Pulse length...

Page 6: ...icient operation and possible loss of production The instruction manual must always be stored close at hand in a place accessible to all people working with the pH ORP Controller If you have questions which are not or insufficiently answered in this instruction manual please contact your authorized supplier They will be glad to assist you 1 2 Intended Use The Alpha pH 2000D pH ORP Controllers are ...

Page 7: ...are qualified for such work Make sure the mains cable is separated from the power supply before opening the unit No modifications to the Alpha pH 2000D are allowed The manufacturer supplier accepts no responsibility for damage caused by unauthorized modifications The risk is borne entirely by the user 1 4 Putting Out of Service Correct Disposal of the Unit Putting out of service First disconnect t...

Page 8: ...nual temperature compensation setting without the ATC probe with independent setting for calibration and process temperature Two galvanically isolated current outputs 0 4 20mA Two switching contacts as set point relays 0 to 2000 seconds time delay adjustment on all relays minimizes false alarms Separately adjustable high and low set point hysteresis dead bands prevent chattering of relays around t...

Page 9: ...or separate temperature sensor NTC300 thermistor An appropriate pH or ORP measurement cable An immersion flow or process assembly with or without a potential matching pin PMP A final control element such as pump or valve A chart recorder Power Mains 80 250 VAC 0 4 20 mA Measurement Cable Housing and Sensors Chart Recorder Alpha pH 2000D Transmitter 4 ...

Page 10: ...2 3 Unit Overview Wall mounting version 5 ...

Page 11: ...l measurement mode 2 3 2 Key functions Key Description Enter Calibration mode requires access code Enter Set up mode requires access code Access sub functions parameters within a function group of Set up mode Confirm store set up parameters and numerical values Start Confirm calibration in Calibration mode Select function group in the Set up mode Set parameters and numerical values if key is press...

Page 12: ... measured value exceeds limit This LED lights green if measured value is within the limit for Relay B or lights red if measured value exceeds limit This LED lights if cleaning cycle is on 2 3 4 Security codes The access to Calibration mode Setup mode and Manual relay operation mode is protected with security codes The security codes are set at the factory and cannot be changed by the user The foll...

Page 13: ...ET P U HOLD Temperature settings see section 6 3 Relay A set point 1 settings see section 6 4 Relay B set point 2 settings see section 6 4 Controller settings see section 6 5 Current output 1 settings see section 6 6 Current output 2 settings see section 6 7 Wash contact settings see section 6 8 Calibration see section 5 CAL ENTER ENT ENT ENTER ENTER ENT ENT ENT ENT ENT ENT ENT ENT ENT ENT SETUP H...

Page 14: ...13 5 cable glands Holes for wall mounting 2X 21 5 85 6 24 66 5 2 62 80 3 15 90 3 54 90 3 54 Holes for post mounting 4X Red Plugs for wall mounting holes enclosure 2X 175 6 88 175 6 88 138 5 43 138 5 43 Cut out mountin 84 3 30 29 1 14 1 22 0 03 0 87 Threaded rod for panel mountin Max 80 Seal gasket g g plates for post mounting Transmitter housing for wall mounting protection class IP 65 9 ...

Page 15: ...nection 9 Wash relay 26 Shield drain wire 10 Alarm relay NC 27 5V to differential pH sensor White wire 11 Alarm relay common 28 Temperature ground black wire 12 Alarm relay NO 29 Temperature Sense Yellow wire 13 4 20 mA temperature output ve terminal 30 Temperature Input Yellow wire 14 4 20 mA temperature output ve terminal Internally connected by jumper to terminal 29 15 4 20 mA pH ORP output ve ...

Page 16: ...r is set for pH measurement or ORP if it is set for ORP measurement The annunciators pH mV or at the upper right side of the display indicate the current measurement mode setting whether the controlling is set for pH mV or ORP measurement From Measurement mode you can access Calibration mode and Setup mode by pressing the CAL key or ENT key followed by the corresponding security code For detailed ...

Page 17: ...y to confirm the calibration security code 3 If ENT key was pressed The display prompts you to enter the security code Press the or key to set the security code to 22 Press the ENT key to confirm the security code and then press the or key to select the calibration sub function If configured for pH control the display shows CAL PH If configured for ORP control the display shows CAL ORP To start ca...

Page 18: ...f one point calibration was selected the display will show the zero point in the lower section of the display and the slope default or using previous two point calibration in the upper section of the display Proceed to step 7 after zero point display If two point calibration was selected the lower section of the display will now show its next lower pH buffer Use and keys to select the second buffe...

Page 19: ... concentrate sample 80 To calibrate the controller for ORP CAL CAL MEAS 59 0 CAL HOLD CAL CAL HOLD C 1 C 2 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 Press the ENT key to start calibration The display prompts you to place the sensor in the high con...

Page 20: ... 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 Press the ENT key to return to the Measurement mode 15 ...

Page 21: ...NT ER ENT ENT ER ENT ENT ER ENT ENT ER ENT ENT ER ENT ENT ER ENT ENT ER ENT SETUP HOL D SETUP HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP HOLD SETUP HOLD Temperature settings see section 6 3 Relay A set point 1 settings see section 6 4 Relay B set point 2 settings see section 6 4 Controller settings see section 6 5 Current output 1 settings see section 6 6 Current ...

Page 22: ...ke the sample 2 Measure the pH value of your sample using a calibrated pH tester hand held meter or bench meter Record the correct pH value 3 Select the OFS sub function and then press the ENT key SETUP HOLD PH SETUP HOLD PH 4 The display shows the current measured pH value lower section of the display and the current offset value upper section of the display Press the or key to adjust the pH valu...

Page 23: ...your process temperature is different from 25 C 4 Setting the process temperature press the or key to adjust the process temperature upper value setting range 10 0 to 125 0 C 14 0 to 257 0 F Press the ENT key to confirm process temperature 5 Setting the calibration temperature press the or key to adjust the calibration temperature upper value setting range 10 0 to 125 0 C 14 0 to 257 0 F Press the...

Page 24: ... SP2 can be selected as Lo Lo Lo Hi Hi Lo or Hi Hi 4 Setting a hysteresis value press the or key to select the desired hysteresis setting range 0 1 to 1 0 pH 10 to 100mV or 1 to 10 for set point 1 set point 2 Press the ENT key to confirm your setting Note Hysteresis prevents rapid contact switching if your value is fluctuating near the set point Please refer to Appendix 3 for a graphical represent...

Page 25: ... 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 off the moment the value reaches the set point and hysteresis This controller lets you set a 0 to 2000 seconds time delay before your relay deactivates Continue with Setup mode procedures or return to Measurement mode by pressing the and keys simultaneously escape...

Page 26: ...P HOLD HOLD ENT SETUP HOLD ENT ENT ENT ENT ENT ENT SETUP SETUP SETUP SETUP SETUP SETUP SETUP SETUP HOLD HOLD HOLD HOLD HOLD HOLD HOLD HOLD SETUP SETUP SETUP HOLD HOLD HOLD ENT ENT ENT ENT ENT ENT SETUP HOLD SETUP HOLD SETUP HOLD ENT ENT SETUP HOLD 1 Select the CNTR sub function then press the ENT key 21 ...

Page 27: ...n press the or key to choose the desired relay status de energized DEEN or energized EN Press the ENT key to confirm your selection 6 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 7 Setting the pulse length Press the or key to set the pulse length setting range 0 5 to 20 seconds Press the ENT key to c...

Page 28: ...A press the or key to set the pH or ORP value to be equivalent to 4 mA or 0 mA respectively Press the ENT key to confirm your setting 4 Setting the pH or ORP value at which the transmitter output will be 20 mA press the or key to set the pH or ORP value to be equivalent to 20 mA Press the ENT key to confirm your setting 5 Selecting out of range current Press the or key to switch CU22 on or off If ...

Page 29: ...r selection 3 Setting the temperature value at which the transmitter output will be 4 mA or 0 mA press the or key to set the temperature value setting range 10 0 to 110 0 C or 14 to 230 F for NTC300 thermistor to be equivalent to 4 mA or 0 mA Press the ENT key to confirm your setting 4 Setting the temperature value at which the transmitter output will be 20 mA press the or key to set the temperatu...

Page 30: ... relay status de energized DEEN or energized EN Press the ENT key to confirm your selection 4 Setting the wash interval in hours Press the or key to set the desired wash interval setting range 0 1 to 200 0 hours Press the ENT key to confirm your setting 5 Setting the wash duration in seconds Press the or key to set the desired wash duration setting range 1 to 2000 seconds Press the ENT key to conf...

Page 31: ...ss the or key to set backlight intensity setting range minimum 1 to maximum 4 Press the ENT key to confirm your setting 4 Selecting the unit of measurement press the or key to select measurement mode PH SY pH measurement with symmetrical input ORP mV SY ORP mV measurement with symmetrical input ORP SY ORP measurement with symmetrical input Press the ENT key to confirm your selection 5 Setting the ...

Page 32: ...irmed with ENT key FCT DEF resets all settings to factory defaults when confirmed with ENT key Press the ENT key The selected function will be executed and the transmitter returns automatically to the Measurement mode Continue with Setup mode procedures or return to Measurement mode by pressing the and keys simultaneously escape 6 10 Calibration CAL sub function The calibration procedure in Setup ...

Page 33: ...to automatic standard mode after switch on relay mode LED Auto lights While in Measurement mode press the REL key pH The display shows the set point value for Relay A and LED A lights pH 2 After two seconds the display shows the set point value for Relay B and LED B lights After two seconds the display shows the status of the Wash relay and LED W lights If Wash relay is off the display shows WASH ...

Page 34: ...ected Limit control The display shows the current measured value and OFF or ON depending on the relay status of the currently selected relay pH SETUP HOLD o If you selected Pulse length control The display shows the current measured value upper value and the on time as a percentage of the current duration set in the CNTR sub function in setup mode lower value If you selected Pulse frequency contro...

Page 35: ... P PI Control Relay contact selection for active mode Energise EN or De energise DEEN Set Point 1 SP1 2 00 to 16 00 pH or 0 to 100 or 1000 to 1000mV Set Point 2 SP2 2 00 to 16 00 pH or 0 to 100 or 1000 to 1000mV Active mode selection for SP1 SP2 LO Relay is active when measured value set point HI Relay is active when measured value set point Hysteresis for SP1 SP2 0 1 to 1 pH or 1 to 10 0 10 to 10...

Page 36: ...nt 0 0 to 110 0 o C or 32 0 to 230 0 o F for NTC300 8 6 Voltage Output Hold Function Switch 12 V Output 11 5 to 12 5 V Output Max 50 mA Hold Function Switch Hold function to freeze output current 0 4 20mA and release control relays 8 7 Display LCD UV coat backlit 14 segments display with symbols for status information Back light On Off selectable with four levels of brightness control 8 8 Power Su...

Page 37: ...Specifications Emitted Interference EN 61326 Immunity to Interference EN 61326 8 12 Environmental Conditions Ambient Temperature operating range 0 to 40 o C Maximum Relative Humidity 80 up to 31 o C decreasing linearly to 50 at 40 o C 32 ...

Page 38: ...pH Differential Electrode with NTC300 thermistor ECFP21A1A1 ORP Differential Electrode with NTC300 thermistor ECFR21A1A1 Note Above pH OR electrodes can withstand a pressure up to 6 bar pressure These electrodes have integral 3m measuring cable Note Please contact your authorised distributor or dealer for the prices of extension measuring cables and other accessories like tee joints electrode asse...

Page 39: ...omer Service Dept has to be informed in advance Items must be carefully packed to prevent damage during shipment and insured against possible damage or loss Eutech Instruments Oakton Instruments will not be responsible for any damage resulting from careless or insufficient packing Warning Shipping damage as a result of inadequate packaging is the user s distributor s responsibility whoever applica...

Page 40: ...re opening the unit to replace the unit fuse make sure the mains cable is separated from the power supply View from both PCBA side Factory setting NTC300 Fuse 250V 315 mA Time Delay Main Rev 0 2 Alpha pH DO20000W New Main Rev 0 2 part No 84X368202 Factory setting NTC300 35 ...

Page 41: ...0 6 92 7 06 9 16 9 32 10 18 15 0 99 4 00 6 90 7 04 9 11 9 27 10 12 20 1 00 4 00 6 88 7 02 9 05 9 22 10 06 25 1 01 4 01 6 86 7 00 9 00 9 18 10 01 30 1 01 4 01 6 85 6 99 8 95 9 14 9 97 35 1 01 4 02 6 84 6 98 8 91 9 10 9 93 40 1 01 4 03 6 84 6 97 8 88 9 07 9 89 45 1 01 4 04 6 83 6 97 8 85 9 04 9 86 50 1 01 4 06 6 83 6 97 8 82 9 01 9 83 55 1 01 4 08 6 83 6 97 8 79 8 99 9 81 60 1 02 4 10 6 84 6 98 8 76...

Page 42: ...4 0 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 BAND DEFAULT 0 5 pH FORWARD DIRECTION SP1 SP2 REVERSE DIRECTION 7 0 37 ...

Page 43: ...P 2 SP 1 0 50 100 Yh Xw Xw MIN function MAX function 11 4 2 Control characteristic of P Controllers as proportional controller Xp 0 Xw Xw Xp Prop band Prop band 50 100 Yh MIN function MAX function SP 2 SP 1 11 4 3 Control characteristic of PI Controllers as proportional integral controller SP1 SP 2 10 Proportional band XP Prop band XP 20 25 100 50 38 ...

Page 44: ...th 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 greater divergence Î greater tON Xp exceeded Î tON T relay remains picked up 39 ...

Page 45: ... 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 greater divergence Î greater f greater frequency Xp exceeded Î max frequency 40 ...

Page 46: ...22 mA SP2 Set point 2 WASH Wash LO Low limit H INT Cleaning interval in hours HI High limit S DUR Cleaning duration in seconds HYS Hysteresis CNFG Configuration ON D On delay BKLT Back light OFF D Off delay LEVL Level CNTR Controller PH SY Symmetrical pH mode L CT Limit control ORP SY Symmetrical ORP mode PLC Pulse length control AL D Alarm delay PFC Pulse frequency control AL C Alarm Contact P PI...

Page 47: ......

Page 48: ... Fax 978 232 6031 Europe P O Box 254 3860 AG Nijkerk Wallerstraat 125K 3862 CN Nijkerk Netherlands Tel 31 033 2463887 Fax 31 033 2460832 Asia Pacific Blk 55 Ayer Rajah Crescent 04 16 24 Singapore 139949 Tel 65 6778 6876 Fax 65 6773 0836 www thermo com process 2009 Thermo Fisher Scientiﬁc Inc All rights reserved Thermo Fisher Scientiﬁc Inc 68X216876 Rev 3 ...

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