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CS511 Dissolved Oxygen Sensor 

1.  Introduction 

The CS511 is a rugged, low-maintenance sensor that is manufactured by 

Sensorex. It consists of a self-polarizing galvanic cell that generates a millivolt 

signal proportional to the amount of oxygen present in the measured medium 

(typically water). 

This manual provides information only for CRBasic dataloggers. 

For  retired  Edlog datalogger support, see a retired  manual at 

www.campbellsci.com\old-manuals

Also refer to a retired manual 

if the CS511 was purchased before June 2008 and for information 

on using the retired PT4-L Agitator. 

2.  Precautions 

 

READ AND UNDERSTAND the 

Safety 

section at the front of this 

manual.  

 

The CS511 is a precision instrument. Please handle it with care.  

 

Because the CS511 is shipped dry, electrolyte needs to be added before 

using the sensor (Section 

7.1

Getting Sensor Ready to Use

 

(p. 7)

). 

 

Letting the CS511 dry in the field shortens the life of the membrane and 

sensor. 

 

The sensor should be stored dry and empty. Therefore, empty the 

electrolyte, rinse the sensor, and remove the membrane. 

 

Replace the membrane and recalibrate the sensor before redeploying the 

CS511 after it has been stored out of water or dried up in the field. 

 

While cleaning, do not touch the center electrode (Section 

8.1

Cleaning 

Sensor and Replacing Membrane

 

(p. 11)

). 

3.  Initial Inspection 

 

Upon receipt of the CS511, inspect the packaging and contents for 

damage. File damage claims with the shipping company.  

 

Immediately check package contents against the shipping documentation 

(see Section 

3.1

Shipping Kit

 

(p. 2)

). Contact Campbell Scientific about any 

discrepancies. 

 

The model number and cable length are printed on a label at the 

connection end of the cable. Check this information against the shipping 

documents to ensure the expected product and cable length were received. 

NOTE 

Summary of Contents for CS511

Page 1: ...CS511 Dissolved Oxygen Sensor Revision 11 18 Copyright 2001 2018 Campbell Scientific Inc...

Page 2: ...ucts to CSI CSI will return such Products by surface carrier prepaid within the continental United States of America To all other locations CSI will return such Products best way CIP port of entry per...

Page 3: ...ing address is CAMPBELL SCIENTIFIC INC RMA _____ 815 West 1800 North Logan Utah 84321 1784 For all returns the customer must fill out a Statement of Product Cleanliness and Decontamination form and co...

Page 4: ...beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit cl...

Page 5: ...iring to the Datalogger 8 7 4 Programming 9 7 5 Calibration 9 8 Maintenance 10 8 1 Cleaning Sensor and Replacing Membrane 11 Appendices A Importing Short Cut Code Into CRBasic Editor A 1 B Example Pro...

Page 6: ...14 8 6 Check for leakage 15 Tables 7 1 CS511 Wire Color Function and Datalogger Connection 9 B 1 Wiring for CR1000X Example B 1 B 2 Wiring for CR200 X Example B 2 CRBasic Examples B 1 VoltDiff CR1000...

Page 7: ...e sensor Section 7 1 Getting Sensor Ready to Use p 7 Letting the CS511 dry in the field shortens the life of the membrane and sensor The sensor should be stored dry and empty Therefore empty the elect...

Page 8: ...able as a download on www campbellsci com It is included in installations of LoggerNet PC200W PC400 or RTDAQ The following procedure also describes using Short Cut to program the CS511 1 Open Short Cu...

Page 9: ...CS511 Dissolved Oxygen Sensor 3 4 Repeat step three for other sensors 5 In Output Setup type the scan rate meaningful table names and the Data Output Storage Interval...

Page 10: ...cts chemically and combines with the anode An electrical current is produced by this chemical reaction which is converted from microamps to millivolts by an in line resistor An in line thermistor also...

Page 11: ...ture equals measuring temperature 5 C Response Time 5 min from 100 to 0 oxygen Materials of Construction Body Anode Cathode Noryl Zinc Silver Diameter 5 72 cm 2 25 in Height 17 78 cm 7 in from bottom...

Page 12: ...Installation If you are programming your datalogger with Short Cut skip Section 7 3 Wiring to the Datalogger p 8 and Section 7 4 Programming p 9 Short Cut does this work for you See Section 4 QuickSt...

Page 13: ...the membrane for wrinkles Replace membrane if wrinkled see Section 8 1 Cleaning Sensor and Replacing Membrane p 11 3 Pour clean water into the lower body and look for leakage around the membrane Disp...

Page 14: ...ess electrolyte will leak out at the joint between the sensor cap and upper body 7 2 Mount Sensor Mount the CS511 in water at a slight angle which prevents bubbles from becoming trapped on the membran...

Page 15: ...for programming code to start a new program or add to an existing custom program Short Cut cannot edit programs after they are imported and edited in CRBasic Editor A Short Cut tutorial is available i...

Page 16: ...2 or Section 7 4 Programming p 9 Instead of step 10 the following expression can be used that allows a new multiplier to be added to the program without rewriting compiling and downloading the progra...

Page 17: ...per body FIGURE 8 1 FIGURE 8 1 Separate the lower body from the upper body 2 Safely dispose of the electrolyte Make sure the O ring does not fall out of the cap 3 Using the membrane tool unscrew the m...

Page 18: ...CS511 Dissolved Oxygen Sensor 12 FIGURE 8 2 Remove membrane and membrane O ring Membrane Lock Washer Membrane Membrane O ring Cap O ring do not dispose Membrane Tool...

Page 19: ...d touching or scratching the center electrode while cleaning FIGURE 8 3 Using a toothbrush to clean sensor 6 Replace the membrane and its O ring by first placing the new O ring at the bottom of the me...

Page 20: ...CS511 Dissolved Oxygen Sensor 14 FIGURE 8 5 Installing membrane 7 Inspect the membrane for wrinkles replace membrane if wrinkled Membrane Lock Washer Membrane O ring Membrane Tool...

Page 21: ...kage If there is no leakage dispose of the water FIGURE 8 6 Check for leakage 9 Pour fresh electrolyte into the bottom cap and fill to the top of the cap 10 Keep the sensor upright so that the cable i...

Page 22: ...reate the Short Cut program following the procedure in Section 4 QuickStart p 2 Finish the program On the Advanced tab click the CRBasic Editor button The program opens in CRBasic with the name noname...

Page 23: ...ublic DOppm Public DOMult Units Batt_Volt Volts Units DOmV mV Units DOppm ppm Define Data Tables DataTable Hourly True 1 DataInterval 0 60 Min 10 Sample 1 DOmV FP2 Sample 1 DOppm FP2 Sample 1 Batt_Vol...

Page 24: ...ear CRBasic Example B 2 VoltSE CR200 X Program CR200 X Series Declare Variables and Units Public Batt_Volt Public DOmV Public DOppm Public DOMult Units Batt_Volt Volts Units DOmV mV Units DOppm ppm De...

Page 25: ...C 1 Appendix C Dissolved Oxygen Tables C 1 Dissolved Oxygen in Fresh Water...

Page 26: ...Appendix C Dissolved Oxygen Tables C 2 C 2 Dissolved Oxygen in Salt Water...

Page 27: ...Asia Location Bangkok Thailand Email info campbellsci asia Website www campbellsci asia China Location Beijing P R China Email info campbellsci com cn Website www campbellsci com cn Spain Location Ba...

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