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Page 6

1.2 Unpacking Information

Before using your new

mini

CHEM

-DO

2

, please check that the following

accessories have been included:

Part No

1.

mini

CHEM

-DO

2

Process Monitor ......................... 113140

2.

mini

CHEM

-DO

2

Handbook .................................. 130050

Options that may have been ordered with your miniCHEM-DO

2

:

TPS Dissolved Oxygen Sensor (submersible to 3 metres max)…

1.  ED1M Dissolved Oxygen sensor (no cable) ............ 123440
2.  5m cable for ED1M ............................................... 123236
3.  Extended cable (per metre) ..................................... 130040

YSI Dissolved Oxygen Sensor and separate cable…

1.  EDYSI Dissolved Oxygen sensor (no cable) ........... 123204
2.  5m cable for EDYSI .............................................. 123210
3.  Extended cable (per metre) ..................................... 130040

Instrument options…

1. Relay control output............................................... 130342
2. 4-20mA loop-powered, remote LCD....................... 130080

Spares…

1.  Membrane Kit for ED1M....................................... 123301
2.  Membrane Kit for EDYSI...................................... 123300
3.  Sodium Sulphite for Zero calibration...................... 123302

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Summary of Contents for 113140

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 DO2 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 mentioned...

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: ...rocess 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 Dissolved Oxygen Troubleshooting 20 10 Appendices 21 10 1 ppM mg L Calibration Table 21 10 2 Selecting Saturation or ppM mg L Readout 22 10 3 Selecting YSI or ED1M Dissolved Oxygen Sensor 24 10 4 Cleaning the Dissolved Oxygen Sensor 26 10 5 Mainten...

Page 4: ...Page 4 1 Introduction 1 1 miniCHEM DO2 Illustration ...

Page 5: ...n Oxygen free solution See section 4 1 Span Calibrate Control Adjust this control to calibrate the miniCHEM DO2 in air or against a Winkler titration See section 4 1 Function Switch The Function Switch is used to select the mode of operation See section 2 Display Window The miniCHEM DO2 has a large easy to read LCD display The units of measurement are clearly shown in the window beneath the displa...

Page 6: ...ubmersible to 3 metres max 1 ED1M Dissolved Oxygen sensor no cable 123440 2 5m cable for ED1M 123236 3 Extended cable per metre 130040 YSI Dissolved Oxygen Sensor and separate cable 1 EDYSI Dissolved Oxygen sensor no cable 123204 2 5m cable for EDYSI 123210 3 Extended cable per metre 130040 Instrument options 1 Relay control output 130342 2 4 20mA loop powered remote LCD 130080 Spares 1 Membrane K...

Page 7: ...o 50 O C sensor limit 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 240V AC Isolation Galvanic isolation of sensor input Power 240V AC 50...

Page 8: ...o 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 Dissolved Oxygen is outside the limit value See section 0 4 MANUAL Switch to MANUAL to manually switch on a control device or alarm when the optional relay output i...

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

Page 11: ...n 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 10 7 Brown standard colour 15 240V AC Earth input Green standard colour 16 Duplicate 240V AC Earth contact S...

Page 12: ...yed 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 miniC...

Page 13: ...nd OFF This feature can significantly increase the life of aerators pumps solenoid valves etc The factory set hysteresis is approximately 0 10 ppM as in the example above The hysteresis can be increased to as high as 2 00 ppM with the HYSTERESIS trimmer in the terminal area For units set up for Saturation the factory set hysteresis is approximately 1 0 Saturation which can be adjusted to 20 0 Satu...

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 DO2 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 bu...

Page 15: ...r between terminals 7 and 8 2 Switch the miniCHEM DO2 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 19 99 ppM or 199 9 Saturation 6 Adjust the SPAN 20mA trimmer in the terminal area until the Digital Milliamp Meter reads 20 mA In t...

Page 16: ...splay reads 0 00 ppM or 0 0 Saturation 6 Rinse the Dissolved Oxygen sensor in distilled water and blot dry Span Calibration 7 a Hang the Dissolved Oxygen sensor in air The tip of the sensor should be pointing downwards b Allow the reading to stabilise After a zero calibration this may take up to 5 minutes 8 c For Saturation readout adjust the SPAN control until the display reads 100 0 For ppM read...

Page 17: ...r can become dirty or coated such as sewage effluent mining slurries etc a Span calibration may have to be done daily 2 The Zero calibration is quite stable long term Monthly Zero calibration is recommended mainly as a routine check 3 Both a Zero and a Span calibration need to be performed when the membrane is replaced ...

Page 18: ...nal relay output 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 DO2 OFF 2 Pull out the...

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: ...n Membrane should be smooth and convex with no wrinkles Re fit membrane if necessary Replace membrane and re fill electrode Return sensor to factory for repair or replacement Blackened Silver anode wire Electrode has been exposed to sulphides or other chemical poisoning See section 10 4 for the sensor cleaning procedure If no improvement return to the TPS factory for cleaning and service Tarnished...

Page 21: ...80 9 30 9 11 53 11 04 10 56 9 58 9 09 10 11 26 10 79 10 31 9 37 8 90 11 10 99 10 54 10 08 9 17 8 72 12 10 74 10 30 9 86 8 98 8 54 13 10 50 10 07 9 65 8 79 8 37 14 10 27 9 86 9 44 8 62 8 20 15 10 05 9 65 9 25 8 45 8 04 16 9 83 9 44 9 06 8 28 7 89 17 9 63 9 25 8 87 8 12 7 74 18 9 43 9 06 8 70 7 97 7 60 19 9 24 8 88 8 53 7 82 7 46 20 9 06 8 71 8 36 7 67 7 32 23 8 55 8 22 7 90 7 25 6 93 24 8 39 8 07 7...

Page 22: ...shown below in case this is needed later ppM or Sat J4 2 a Remove the function knob and the four screws at each corner of the front panel Remove the front panel b The Decimal Point jumpers are three pairs of jumpers located at the top left hand side of the display Set the Decimal Point jumpers as shown below 3 Ensure that the Red and Blue of the sensor cable ARE NOT connected to terminals 1 and 2 ...

Page 23: ...and the four screws at each corner of the front panel Remove the front panel b The Decimal Point jumpers are three pairs of jumpers located at the top left hand side of the display Set the Decimal Point jumpers as shown below 3 Ensure that the Red and Blue of the sensor cable are connected to terminals 1 and 2 see the connection diagram in section 3 1 ...

Page 24: ... terminal area to be closed J5 YSI or ED1 2 a Set the YSI or ED1M J3 jumper in the terminal area across the second jumper from the left YSI or ED1M J3 b When the miniCHEM DO2 is set to ppM readout and the samples have a high salinity there may not be enough adjustment available with the SPAN control to calibrate the unit If this is the case set the YSI or ED1M J3 jumper to the following setting YS...

Page 25: ...ed later J5 YSI or ED1 2 a Set the YSI or ED1M J3 jumper in the terminal area across the first jumper from the left YSI or ED1M J3 b When the miniCHEM DO2 is set to ppM readout and the samples have a high salinity there may not be enough adjustment available with the SPAN control to calibrate the unit If this is the case set the YSI or ED1M J3 jumper to the following setting YSI or ED1M J3 ...

Page 26: ...ure compensation pump assembly refer to the YSI instruction leaflet The silver anode is the triangular block inside the tip of the sensor The usual indication of poisoning of the silver anode is blackening 3 Rinse the sensor to remove any loose particles 4 Soak the electrode for 10 minutes in 5 Ammonia solution 5 Rinse well under a tap 6 If an ultra sonic cleaning bath is available add a few drops...

Page 27: ...ush the barrel carefully onto the lexan internal rod As this is done check for leaks on the membrane The internal rod can be used to gently pump the membrane to check for leaks 6 If no leaks can be seen screw the outer barrel into place so that the membrane is evenly and smoothly stretched over the gold internal cathode gold bead at end DO NOT OVER TIGHTEN If the probe is washed off and put in fre...

Page 28: ...on 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 version 16 No connection for 12V DC version 17 No connection for 12V DC version 18 Positive ...

Page 29: ...Page 29 10 8 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 DO2 units ...

Page 30: ...Page 30 10 9 Relay Output Wiring Examples for 12V DC powered units The diagrams below provide some examples of wiring the optional relay output for miniCHEM DO2 units with the 12V DC power option ...

Page 31: ...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 32: ...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 33: ...Page 33 12 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 ...

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