INSTRUCTION MANUAL CSIM11 pH and ORP Probes Revision: 7/14 C o p y r i g h t © 2 0 0 0 - 2 0 1 4 C a m p b e l l S c i e n t i f i c , I n c .
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Table of Contents PDF viewers: These page numbers refer to the printed version of this document. Use the PDF reader bookmarks tab for links to specific sections. 1. Introduction ................................................................. 1 2. Cautionary Statements ............................................... 1 3. Initial Inspection ......................................................... 1 4. Quickstart .................................................................... 1 4.1 4.
Table of Contents B. Example Programs.................................................. B-1 B.1 B.2 CRBasic Program ............................................................................ B-1 Edlog Programs ............................................................................... B-2 B.2.1 CR10X Program using Edlog’s Expression Editor .................. B-2 B.2.2 CR10(X) Example using Instructions Instead of Edlog’s Expression Editor..............................................................
CSIM11 pH and ORP Probes 1. Introduction The CSIM11 measures the full pH range of liquids, and the CSIM11-ORP measures oxidation reduction potential (ORP) of liquids. They can be submerged in water or inserted into tanks, pipelines, and open channels. The reference solutions and bulb configuration are optimized for natural water applications. Alternate reference solutions and bulb configurations are available. Contact Campbell Scientific for more information. 2. 3. 4.
CSIM11 pH and ORP Probes 2 2. The Short Cut installation should place a Short Cut icon on the desktop of your computer. To open Short Cut, click on this icon. 3. When Short Cut opens, select New Program. 4. Select Datalogger Model and Scan Interval (default of 5 seconds is alright for most applications). Click Next.
CSIM11 pH and ORP Probes 5. Under the Available Sensors and Devices list, select the Sensors | Temperature folder. Select 107 Temperature Probe. Click to move the selection to the Selected device window. Use the data default of degree Celsius. 6. Under the Available Sensors and Devices list, select the Sensors | Water | Quality folder. Select CSIM11 pH Probe. Click to move the selection to the Selected device window. Click on the Solution temperature (Deg C) reference box and select T107_C.
CSIM11 pH and ORP Probes 7. After selecting the sensors, click at the left of the screen on Wiring Diagram to see how the sensor is to be wired to the datalogger. The wiring diagram can be printed out now or after more sensors are added. 8. Select any other sensors you have, then finish the remaining Short Cut steps to complete the program. The remaining steps are outlined in Short Cut Help, which is accessed by clicking on Help | Contents | Programming Steps. 9.
CSIM11 pH and ORP Probes 2. The Short Cut installation should place a Short Cut icon on the desktop of your computer. To open Short Cut, click on this icon. 3. When Short Cut opens, select New Program. 4. Select Datalogger Model and Scan Interval (default of 5 seconds is alright for most applications). Click Next.
CSIM11 pH and ORP Probes 5. Under the Available Sensors and Devices list, select the Sensors | Water | Quality folder. Select CSIM11 ORP Probe. Click to move the selection to the Selected device window. The probe usually requires an offset adjustment. The white panel at the bottom of the Properties window provides a procedure for determining the value that should be entered in Offset box. 6.
CSIM11 pH and ORP Probes 5. 7. Select any other sensors you have, then finish the remaining Short Cut steps to complete the program. The remaining steps are outlined in Short Cut Help, which is accessed by clicking on Help | Contents | Programming Steps. 8. If LoggerNet, PC400 or PC200W is running on your PC, and the PC to datalogger connection is active, you can click Finish in Short Cut and you will be prompted to send the program just created to the datalogger. 9.
CSIM11 pH and ORP Probes Threading is 3/4 inch NPT male 6.
CSIM11 pH and ORP Probes Drift: < 2 mV per week Power: Two 3 Vdc lithium batteries that should last the lifetime of the sensor Length: 17.8 cm (7.0 in) Diameter: 3.0 cm (1.2 in) Weight with 15 ft cable: 0.5 kg (1 lb) pH Range: 0 to 14 Zero Potential: 7.0 pH ±0.2 pH Sodium Error: < 0.05 pH in 0.1 Molar Na+ ion at 12.8 pH Output: ±59 mV/pH unit 6.1.1 pH Sensor 6.1.2 ORP Sensor ORP Range: 7.
CSIM11 pH and ORP Probes 7.3 Wiring The CSIM11 and CSIM11-ORP are connected to differential channels. Connections to Campbell Scientific dataloggers are given in TABLE 7-1. TABLE 7-1.
CSIM11 pH and ORP Probes NOTE Short Cut cannot edit programs after they are imported and edited in CRBasic Editor. A Short Cut tutorial is available in Section 4, Quickstart. If you wish to import Short Cut code into either Edlog or CRBasic Editor to create or add to a customized program, follow the procedure in Appendix A.1, Importing Short Cut Code into a Program Editor. Programming basics for CRBasic and Edlog dataloggers are provided in the following sections.
CSIM11 pH and ORP Probes 8. Calibration/ORP Check 8.1 pH Sensor Calibration Calibration should be carried out according to the detailed procedure later in this document (see Appendix C, Detailed Calibration Procedure and Manufacturer Tips). The following paragraphs are for general information. The calibration should use two or more pH standards.
CSIM11 pH and ORP Probes 9.1 • Coatings can cause 1) Slower Response; 2) Zero Offset increase; 3) Dehydration • Steam Sterilization causes 1) Dehydration; 2) Ag/AgCl dissolving from Silver Reference Element Replacing Reference Electrolyte Readings that drift indicate the electrolyte should be checked. Refill Procedure: NOTE 1. Clean the probe tip as discussed in the maintenance procedures below. 2. Remove the reference reservoir plug. Place it where it will stay clean. 3.
CSIM11 pH and ORP Probes 10 minutes each. After treating the electrode with these strong acids or bases, rinse the electrode with water and soak it in pH 4 buffer for at least 1/2 hour. Greasy and oily coatings are best removed with a detergent solution or a solvent that will not attack the electrode’s body. Methanol and isopropyl alcohol are good choices for solvents. A soft toothbrush can be used with the detergent to remove stubborn coatings.
CSIM11 pH and ORP Probes sensor in 3.5 molar KCl, or water if KCl is not available, and heat to approximately 60 °C for 15 minutes; retest. SYMPTOM: Slow response and/or noisy, erratic readings. POSSIBLE REASON: Slow response is caused by a very high impedance in either glass or reference electrode. CHECK: 1. Visually inspect pH bulb and reference junction for coating or clogging. If coated, clean as described in Section 9.2, Electrode Cleaning. 2.
CSIM11 pH and ORP Probes 16
Appendix A. Importing Short Cut Code This tutorial shows: • • How to import a Short Cut program into a program editor for additional refinement. How to import a wiring diagram from Short Cut into the comments of a custom program. A.1 Importing Short Cut Code into a Program Editor Short Cut creates files that can be imported into either CRBasic Editor or Edlog program editor. These files normally reside in the C:\campbellsci\SCWin folder and have the following extensions: • • • • • • • .
Appendix A. Importing Short Cut Code 6. Import wiring information to the program by opening the associated .DEF file. Copy and paste the section beginning with heading “-Wiring for CRXXX–” into the CRBasic program, usually at the head of the file. After pasting, edit the information such that a ' character (single quotation mark) begins each line. This character instructs the datalogger compiler to ignore the line when compiling the datalogger code. A.1.
Appendix B. Example Programs B.1 CRBasic Program The following CR1000 program measures a CSIM11 and 107 temperature probe and has the datalogger process the raw data after each measurement sequence. 'CR1000 Series Datalogger 'declare variables Public pH, pHMult, TempC 'Define Data Tables DataTable (pH,1,-1) DataInterval (0,1,Min,10) Sample (1,pH,FP2) Sample (1,TempC,FP2) EndTable 'Main Program BeginProg Scan (60,Sec,0,0) 'measure water temperature Therm107 (TempC,1,3,Vx1,0,250,1.
Appendix B. Example Programs B.2 Edlog Programs The following CR10X programs measure a CSIM11 and 107 temperature probe and have the datalogger process the raw data after each measurement sequence. The first program uses Edlog’s expression editor to apply the temperature correction multiplier to the measured pH. The second program uses a series of instructions to apply the temperature correction multiplier. B.2.
Appendix B. Example Programs *Table 2 Program 02: 0.0000 Execution Interval (seconds) *Table 3 Subroutines End Program B.2.2 CR10(X) Example using Instructions Instead of Edlog’s Expression Editor ;Measure Water Temperature 1: Temp (107) (P11) 1: 1 Reps 2: 1 SE Channel 3: 1 Excite all reps w/E1 4: 1 Loc [ TempC ] 5: 1.0 Mult 6: 0.0 Offset ;Calculate the Multiplier for Temperature Correction ;Note: See Section 4.
Appendix B. Example Programs 9: Z=X*Y (P36) 1: 2 2: 3 3: 2 X Loc [ pH Y Loc [ pHMult Z Loc [ pH ] ] ] ;The following instruction applies an Offset to the pH. Use an Offset of 7 ;initially as shown below. Adjust the Offset if necessary during probe calibration.
Appendix C. Detailed Calibration Procedure and Manufacturer Tips C.1 Calibration CAUTION Good laboratory practices should be used and protective gloves and safety glasses should be worn while handling any solvents or chemicals. If you are unsure of the proper technique for handling a chemical or of its hazardous properties, it is best to discard the electrode eliminating the risk of danger. MATERIALS Buffers a) 4.01 pH (potassium bipthalate) b) 7.00 pH (potassium phosphate) c) 10.
Appendix C. Detailed Calibration Procedure and Manufacturer Tips 7. Remove and rinse the electrode, then place it in the 10.00 buffer. 8. In the datalogger real time monitor mode, the electrode should read 10.00 pH, ±0.2, depending on temperature. 9. If the readings in Steps 6 and 8 show a slope error (error proportional to the difference between the buffer pH and 7), then the probe has a slight slope error, which should be easy to correct by adjusting the multiplier in VoltDiff() or Volt (Diff) (P2).
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