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TPS miniCHEM-Cond, Manual

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TPS miniCHEM-Cond Manual Download Page 17

 

Page 17

10.  When the reading has stabilised, adjust the 

SPAN

 control until the display 

shows the value of the standard.  

11.  Rinse the Conductivity sensor in distilled water and blot dry.

 

12.  The 

mini

CHEM

-Cond

 is now calibrated and ready for Conductivity 

measurements.

 

4.2 Calibration Notes 

1. The Zero calibration is quite stable long term, and only needs to be performed 

monthly as a routine check. In applications where the sensor can become dirty 
or coated with oils etc., a Zero calibration may need to be done weekly. 

2. A Span calibration should be performed at least weekly. Of course, more 

frequent calibration will result in greater confidence in results. 

Summary of Contents for miniCHEM-Cond

Page 1: ...y listed Sub sections have also been included to enable you to find the information you need at a glance 2 Introduction The introduction has a diagram and explanation of the display and controls of the miniCHEM Cond It also contains a full listing of all of the items that you should have received with the unit Please take the time to read this section as it explains some of items that are mentione...

Page 2: ...ty Ltd ABN 30 009 773 371 4 Jamberoo Street Springwood Brisbane Australia 4127 Phone 07 32 900 400 International 61 7 32 900 400 Fax 07 3808 4871 International 61 7 3808 4871 Email tps tps com au Web www tps com au ...

Page 3: ...t 15 4 Calibration 16 4 1 Calibration Procedure 16 4 2 Calibration Notes 17 5 Process Monitoring 18 6 Automatic Dosing 18 7 Manual Dosing 18 8 Fuse Replacement 18 9 Troubleshooting 19 9 1 Instrument Function Troubleshooting 19 9 2 Conductivity Troubleshooting 20 10 Warranty 22 11 Appendices 24 11 1 Re setting the Display Range 24 11 2 Care Cleaning and Maintenance of Conductivity Electrodes 25 11 ...

Page 4: ...Page 4 1 Introduction 1 1 miniCHEM Cond Illustration ...

Page 5: ...ith the sensor dry and in air See section 4 1 Span Calibrate Control Adjust this control to Span calibrate the miniCHEM Cond in a Conductivity standard See section 4 1 Function Switch The Function Switch is used to select the mode of operation See section 2 Display Window The miniCHEM Cond has a large easy to read LCD display The units of measurement are clearly shown in the window beneath the dis...

Page 6: ... 112140 2 miniCHEM Cond Handbook 130050 3 Conductivity standard to suit customer specified range Options that may have been ordered with your miniCHEM Cond Conductivity Sensors 1 k 0 1 Industrial Sensor 5m 112205 2 k 1 0 Industrial Sensor 5m 112206 3 k 10 Industrial Sensor 5m 112207 Instrument options 1 Relay control output 130342 2 4 20mA loop powered remote LCD 130080 ...

Page 7: ...100 0 o C Zero Range 5 Span Range 70 to 130 Sensors Platinised Platinum k 0 1 k 1 0 or k 10 Enclosure Polycarbonate waterproof to IP65 Display 12 7 mm LCD optional remote 4 20mA loop powered display available Analogue Outputs 4 to 20mA 500 Ohms max loop resistance 0 to 1 V DC min load 1000 Ω 0 to 10 V DC optional min load 1000 Ω Control Output optional Clean contact changeover relay rated to 2A at...

Page 8: ...TANDBY to inhibit the Alarm LED and optional output relay action Select this mode for calibration or when automatic dosing is not required 3 AUTO Switch to AUTO to enable the Alarm LED and optional relay output These will be activated when the Conductivity is outside the limit value See section 3 5 4 MANUAL Switch to MANUAL to manually dose chemicals or water when the optional relay output is fitt...

Page 9: ...n and Set up 3 1 Connection and Configuration Diagram The diagram below is provided as a reference for the terminal connections configuration jumpers and user adjustable trimmers that are discussed throughout this section ...

Page 10: ...or should always be mounted as close as possible to the injection point This will cause the sensor to detect the added chemicals or water immediately and shut the addition off until mixing has taken place For in line mounting it is important that injection is upstream Additionally the line must be run through a mixing chamber such as a large drum to ensure that the injected chemical or water has m...

Page 11: ...mer defined 8 ve of current or voltage output Customer defined 9 No Connection 10 Normally Closed contact of optional relay output Customer defined 11 Common contact of optional relay output Customer defined 12 Normally Open contact of optional relay output Customer defined 13 240V AC Active input Brown standard colour 14 Duplicate 240V AC Active contact See section 11 2 Brown standard colour 15 2...

Page 12: ...ayed Note that the Alarm LED and optional output relay are now disabled The 4 20mA or 0 1V outputs are still active and proportional to displayed value 2 Adjust the LIMIT control until the display reads the desired trip point value 3 5 2 Setting the alarm control direction The control limit can be set as a too high or too low trip point using the Lo Hi Control jumpers in the terminal area The mini...

Page 13: ...he points at which the output is switched ON and OFF This feature can significantly increase the life of pumps and solenoid valves The factory set hysteresis is approximately 10 digits regardless of decimal point location as in the example above The hysteresis can be increased to as high as 40 digits with the HYSTERESIS trimmer in the terminal area Turning the HYSTERESIS clockwise increases the hy...

Page 14: ... for 4 to 20 mA output are C V C V C The jumper settings for 0 to 1V DC output are C V C V C Note that the spare jumper has been fitted to a spare Current Voltage Output jumper pin This is a safe place to keep it in case the miniCHEM Cond needs to be reset to current output in the future 0 to 10V DC output is available as a factory fitted option The jumper settings are the same as detailed above b...

Page 15: ...er between terminals 7 and 8 2 Switch the miniCHEM Cond to SET LIMIT 3 Adjust the LIMIT control until the display reads 0 00 4 Adjust the ZERO 4mA trimmer in the terminal area until the Digital Milliamp Meter reads 4 mA 5 Adjust the LIMIT control until the display reads 1999 regardless of decimal point location 6 Adjust the SPAN 20mA trimmer in the terminal area until the Digital Milliamp Meter re...

Page 16: ... blot dry Zero Calibration 6 Shake the Conductivity sensor dry and hang it in air DO NOT wipe the platinised platinum electrode surface as this will remove the platinum black layer 7 When the reading has stabilised adjust the ZERO control until the display reads exactly zero Span Calibration 8 Place the Conductivity sensor into a small sample of Conductivity standard A suitable standard should be ...

Page 17: ...d ready for Conductivity measurements 4 2 Calibration Notes 1 The Zero calibration is quite stable long term and only needs to be performed monthly as a routine check In applications where the sensor can become dirty or coated with oils etc a Zero calibration may need to be done weekly 2 A Span calibration should be performed at least weekly Of course more frequent calibration will result in great...

Page 18: ...tput is fitted NOTE The output will be ON continuously while the function switch is set to MANUAL It will not be switched OFF again until the switch is set back to one of the other modes 8 Fuse Replacement If the current drain from any device connected to the output relay exceeds 1 Amp the output protection fuse will blow To replace the fuse 1 SWITCH THE miniCHEM Cond OFF 2 Pull out the black fuse...

Page 19: ...section 3 5 2 Return unit to factory to have relay output fitted part no 130342 Check and adjust the HYSTERESIS trimmer see section 3 5 3 If in doubt set this to minimum level Check and replace fuse if necessary see section 8 Return to TPS for repair Incorrect analogue output signal 1 Current Voltage Output jumpers incorrectly set for required output 2 4 20mA loop resistance too high 3 Load on 0 1...

Page 20: ...d solution is inaccurate 5 Electrode is faulty Immerse electrode at least to the vent hole in the white plastic cover Clean electrode as per the instructions detailed in section 11 2 2 Electrode requires replatinisation Return to the factory or see details in section 11 2 3 Replace standard solution Return electrode to factory for repair or replacement Standard calibration fails reading is too hig...

Page 21: ...e details in section 11 2 3 Readings drift 1 Electrode may have a build up of dirt or oily material on electrode wires Clean electrode as per the instructions detailed in section 11 2 2 Readings are low or near zero 1 Electrode may have a build up of dirt or oily material on electrode wires 2 Electrode is not immersed deeply enough 3 Electrode is faulty Clean electrode as per the instructions deta...

Page 22: ...he registration section returned to TPS Pty Ltd within 7 days No claims will be recognised without the original guarantee card or other proof of purchase This warranty becomes invalid if modifications or repairs are attempted by unauthorised persons or the serial number is missing PROCEDURE FOR SERVICE If you feel that this equipment is in need of repair please re read the manual Sometimes instrum...

Page 23: ...aired and returned to you by air express where possible For out of warranty units a repair cost will be calculated from parts and labor costs If payment is not received for the additional charges within 30 days or if you decline to have the equipment repaired the complete unit will be returned to you freight paid not repaired For full account customers the repair charges will be debited to your ac...

Page 24: ... 10 sensor 0 to 199 9 µS cm A B 1 2 1 2 3 4 Decimal Point A B 1 2 1 2 3 4 Decimal Point This range not available for k 10 sensor 0 to 1999 µS cm A B 1 2 1 2 3 4 Decimal Point A B 1 2 1 2 3 4 Decimal Point A B 1 2 1 2 3 4 Decimal Point 0 to 1 999 mS cm This is the same range as above Only the decimal point jumper is changed A B 1 2 1 2 3 4 Decimal Point A B 1 2 1 2 3 4 Decimal Point A B 1 2 1 2 3 4...

Page 25: ...ng see section 11 2 3 You can help to maintain the platinum black layer by following these simple rules 1 NEVER touch or rub the electrode wires with your fingers cloth etc 2 Avoid using the electrode in solutions that contain a high concentration of suspended solids such as sand or soil which can abrade the electrode wires Filter these types of solutions first if possible 3 Avoid concentrated aci...

Page 26: ...e in methylated spirits 3 Stubborn contamination can be removed by soaking the electrode in a solution of 1 part Concentrated HCl and 10 parts distilled water The electrode should not be soaked for more than approximately 5 minutes otherwise the platinum black layer may start to dissolve 4 If all of these methods fail then the last resort is to physically scrub the electrode wires which will remov...

Page 27: ...Rinse the electrode well in distilled water 3 Immerse the electrode in platinising solution to the same level as for calibration see section 4 1 Platinising solution is available from TPS part no 122300 Alternatively platinising solution can be prepared by dissolving 1g of Hydrogen Chloroplatinate H2PtCl16 in 30mL of distilled water and including about 0 01g of Lead Acetate CH3COO 2Pb and a drop o...

Page 28: ...e output Customer defined 8 ve of current or voltage output Customer defined 9 No Connection 10 Normally Closed contact of optional relay output Customer defined 11 Common contact of optional relay output Customer defined 12 Normally Open contact of optional relay output Customer defined 13 No connection for 12V DC version 14 Negative of 12V DC Input Customer defined 15 No connection for 12V DC ve...

Page 29: ...Page 29 11 4 Relay Output Wiring Examples for mains powered units The diagrams below provide some examples of wiring the optional relay output for standard mains powered miniCHEM Cond units ...

Page 30: ...Page 30 11 5 Relay Output Wiring Examples for 12V DC powered units The diagrams below provide some examples of wiring the optional relay output for miniCHEM Cond units with the 12V DC power option ...

Page 31: ...Page 31 11 6 Drilling Template The template below is for the three mounting positions for the miniCHEM enclosure This template is actual size and can be photocopied or removed as required ...

Page 32: ...Page 32 ...

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