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EUTECH INSTRUMENTS alpha-pH 2000D, Instruction Manual, Page: 36 / 50

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EUTECH INSTRUMENTS alpha-pH 2000D Instruction Manual Download Page 36

Instruction Manual 

 

α

lpha-pH2000D 

 

- 31 - 

 

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).  
 

 

 

off

 

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.  

 
 
 

Summary of Contents for alpha-pH 2000D

Page 1: ...Technology Made Easy Instruction Manual lpha pH2000D pH and ORP Controller Transmitter 68X216855 Rev 1 12 04...

Page 2: ...pH2000D pH ORP controller transmitter If you have doubts in the use of the instrument please do not hesitate to contact the nearest Eutech Instruments Authorised Distributor The information presented...

Page 3: ...ower 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 sur...

Page 4: ...16 5 5 VIEW ACTUAL ZERO AND SLOPE 17 6 SETUP MODE 18 6 1 ENTER SETUP MODE 18 6 2 ELECTRODE OFFSET OFS SUB FUNCTION 19 6 3 SETTING TEMPERATURE SET C F SUB FUNCTION 20 6 4 CONTROL RELAY A RELAY B SP1 S...

Page 5: ...JUMPER SETTINGS 38 11 2 APPENDIX 2 PH BUFFER VALUES AT VARIOUS TEMPERATURES 39 11 3 APPENDIX 3 SIMPLE EXPLANATION ON THE FUNCTION OF HYSTERESIS 40 11 4 APPENDIX 4 GENERAL INSTRUCTIONS CONCERNING CONT...

Page 6: ...d could lead to inefficient 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...

Page 7: ...smitter and who are qualified for such work Make sure the mains cable is separated from the power supply before opening the unit No modifications to the lpha pH 2000D are allowed The manufacturer supp...

Page 8: ...pensation ATC Manual temperature compensation setting without the ATC probe with independent setting for calibration and process temperature Two galvanically isolated current outputs 0 4 20mA Two swit...

Page 9: ...e with integrated 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...

Page 10: ...Instruction Manual lpha pH2000D 5 2 3 Unit overview Wall mounting version...

Page 11: ...ble in symmetrical 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 func...

Page 12: ...or lights red if 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 i...

Page 13: ...OLD HOLD HOLD C 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 sett...

Page 14: ...4 57 8 2 28 For Pg13 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 8...

Page 15: ...1 21 Earth ground 5 Relay A SP 1 22 no connection 6 Relay B SP 2 23 no connection 7 Relay B SP 2 24 no connection 8 Wash relay 25 no connection 9 Wash relay 26 Shield drain wire 10 Alarm relay NC 27 5...

Page 16: ...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 disc...

Page 17: ...e if the controller 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 whe...

Page 18: ...ess the ENT key 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 t...

Page 19: ...e point or a two point calibration Press the ENT for two point calibration or the CAL key for one point calibration The electrode indicator and CAL indicator both flash for a few seconds The controlle...

Page 20: ...ibration beginning from Step 1 Note When calibrating with manual temperature compensation the controller automatically changes from the preset process temperature to the calibration temperature After...

Page 21: ...t measurement 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 concentrate sample 80 To cali...

Page 22: ...s original calibration data 5 5 View actual zero and slope ENT ENT CAL pH CAL MEAS PH O C ATC 1 While in Measurement mode press the CAL key The display will prompt you to enter a security code Leave t...

Page 23: ...ee section 6 6 Current output 2 settings see section 6 7 Wash contact settings see section 6 8 Unit settings see section 6 9 Calibration see section 5 6 SETUP MODE 6 1 Enter Setup mode In the Setup mo...

Page 24: ...at the time you take 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 pre...

Page 25: ...s at 25 C even if 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...

Page 26: ...ENT key to confirm your selection Note This parameter lets you choose the relay function Select LO to activate the relay when the pH ORP value undershoots the set point select HI to activate the rela...

Page 27: ...seconds time delay before your relay activates 6 Setting the off delay time lag press the or key to enter the off delay time for set point 1 set point 2 Your controller will delay deactivation of the...

Page 28: ...ermines the controller s parameters SETUP SETUP 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 SET...

Page 29: ...lay status de energized DEEN or energized EN Press the ENT key to confirm your selection If the controller is set to proportional control P PI 4 Selecting the proportional controller type press the or...

Page 30: ...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 1...

Page 31: ...ill be 4 mA or 0 mA 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 trans...

Page 32: ...key to confirm your 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...

Page 33: ...to choose desired 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 set...

Page 34: ...ss the ENT key to confirm your selection 3 Setting the backlight intensity appears only If backlight is on press the or key to set backlight intensity setting range minimum 1 to maximum 4 Press the EN...

Page 35: ...ps old values active when confirmed with ENT key CAL DEF resets all calibrations to factory defaults when confirmed with ENT key FCT DEF resets all settings to factory defaults when confirmed with ENT...

Page 36: ...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 light...

Page 37: ...OLD off If you selected 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 len...

Page 38: ...ction of Setup Off Limit Control P PI Control Pulse length Pulse frequency a Off The control function of the controller is off SP1 SP2 function will not appear in setup when Off is selected in CNTR fu...

Page 39: ...ional to pH mV measured Current output selection 4 20mA or 0 20mA pH mV value for 0 or 4mA current 2 00 to 16 00 pH or 0 to 100 or 1000 to 1000mV pH mV value for 20mA current 2 00 to 16 00 pH or 0 to...

Page 40: ...ew Terminal 3 5mm pitch Relay 1 Relay 2 Wash Relay Alarm Relay 9 pin Screw Terminal 7 62mm pitch Current Output 1 Current Output 2 12V output Hold function switch 13 pin Screw Terminal 3 5mm pitch Con...

Page 41: ...ments Order Code 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 b...

Page 42: ...on whatsoever Customer 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...

Page 43: ...tings Caution Before opening the unit to replace the unit fuse make sure the mains cable is separated from the power supply View from both PCBA side Main Rev 0 2 Alpha pH DO20000W New Main Rev 0 2 par...

Page 44: ...10 25 10 0 99 4 00 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...

Page 45: ...t 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...

Page 46: ...switch Xp 0 Xp 0 0 50 100 Yh Xw Xw SP 2 SP 1 MIN function MAX function 11 4 2 Control characteristic of P Controllers as proportional controller Xp 0 50 100 Yh Xw Xw Xp Prop band Prop band SP 2 SP 1 M...

Page 47: ...ay 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...

Page 48: ...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 accor...

Page 49: ...output current 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...

Page 50: ...ntact 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 eute...

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