Campbell CS526 Instruction Manual
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Campbell CS526 Instruction Manual

Isfet ph probe
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CS526 ISFET pH Probe
Revision: 6/15
C o p y r i g h t
©
2 0 0 9 - 2 0 1 5
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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  • Page 1 CS526 ISFET pH Probe Revision: 6/15 C o p y r i g h t © 2 0 0 9 - 2 0 1 5 C a m p b e l l S c i e n t i f i c ,...
  • Page 3 Limited Warranty The CS526 ISFET pH Probe is warranted for six (6) months subject to this limited warranty: “Products manufactured by CSI are warranted by CSI to be free from defects in materials and workmanship under normal use and service for twelve months from the date of shipment unless otherwise specified in the corresponding product manual.
  • Page 4 SCIENTIFIC, INC., phone (435) 227-9000. After an application engineer determines the nature of the problem, an RMA number will be issued. Please write this number clearly on the outside of the shipping container. Campbell Scientific’s shipping address is: CAMPBELL SCIENTIFIC, INC.
  • Page 5 • Periodically (at least yearly) check electrical ground connections. WHILE EVERY ATTEMPT IS MADE TO EMBODY THE HIGHEST DEGREE OF SAFETY IN ALL CAMPBELL SCIENTIFIC PRODUCTS, THE CUSTOMER ASSUMES ALL RISK FROM ANY INJURY RESULTING FROM IMPROPER INSTALLATION, USE, OR MAINTENANCE OF TRIPODS, TOWERS, OR ATTACHMENTS TO TRIPODS AND TOWERS SUCH AS SENSORS, CROSSARMS, ENCLOSURES, ANTENNAS, ETC.

  • Page 7: Table Of Contents

    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 ............2 4.
  • Page 8 Importing Short Cut Code into a Program Editor ......A-1 B. Example Program ............ B-1 C. Calibration ............... C-1 Example Calibration Program ............C-2 Figures 9-1. Tip of the CS526 probe ..............11 Tables 7-1. Wiring ....................6 7-2. “Get Data” Command and Response ..........7 7-3.

  • Page 9: Introduction

    CS526 ISFET pH Probe Introduction The CS526 ISFET pH Probe measures pH from 1 to 14 in aqueous or semi- solid solutions. It outputs TTL serial data that is read by compatible dataloggers (see Section 6, Specifications (p. 5) Before using the CS526, please study •...

  • Page 10: Initial Inspection

    Use SCWin to Program Datalogger and Generate Wiring Diagram Short Cut is an easy way to program your datalogger to measure the CS526 and assign datalogger wiring terminals. The following procedure shows using Short Cut to program the CS526.
  • Page 11 CS526 ISFET pH Probe 3. When Short Cut opens, select New Program. 4. Select Datalogger Model and Scan Interval (default of 5 seconds is OK for most applications). Click Next.
  • Page 12 CS526 ISFET pH Probe 5. Under the Available Sensors and Devices list, select the Sensors | Water | Quality folder. Select CS526 ISFET pH Probe. Click to move the selection to the Selected device window. 6. After selecting the sensor, click at the left of the screen on Wiring Diagram to see how the sensor is to be wired to the datalogger.

  • Page 13: Overview

    (ISFET) semi-conductor as its pH-sensitive element, and includes a silver/silver chloride – potassium chloride reference system. The CS526’s design allows it to be suitable for a variety of liquid pH- monitoring applications. Its electronics are safely embedded in a durable PEEK body.

  • Page 14: Operation

    CS526 ISFET pH Probe Operating Temperature: 10 to 40 °C Water Pressure: 0 to 700 kPa (0 to 101.5 psi) Power Requirement Source: 5 Vdc Load: 15 mA maximum Output: TTL logic, 2400 bps 8 data bits, no parity, 1 stop bit...

  • Page 15: Datalogger Programming

    Datalogger Programming 7.2.1 Get Data Command The datalogger needs to send a “get data” serial command to the CS526 to get the pH data. This command is sent to the CS526 via the SerialOut() CRBasic instruction (see Section 7.2.3.2, SerialOut() Instruction ).

  • Page 16: Instruction Descriptions

    CS526 ISFET pH Probe 7.2.3 Instruction Descriptions 7.2.3.1 SerialOpen() Instruction The SerialOpen() instruction has the following syntax: SerialOpen(ComPort,BaudRate,Format,TXDelay,BufferSize) ComPort—the datalogger COM port in which the probe is connected. BaudRate—choose 2400 Format—choose 16, which is TTL Logic; No parity, one stop bit, 8 data bits;...

  • Page 17: Splitstr() Instruction

    NOTE Follow the procedure provided by the Assistance section at the beginning of this document if the CS526 is not operating properly and requires return to Campbell Scientific. The most common causes for erroneous pH data include: • poor sensor connections to the datalogger •...

  • Page 18: Maintenance

    Soak probe for 10 minutes in saturated KCl solution (pn 16349). Probe cannot be fixed if chip is scratched. Maintenance CAUTION The CS526 needs to be periodically cleaned and calibrated to ensure accurate readings and proper operation. The CS526 has no user-serviceable parts. Cleaning Proper maintenance of a probe is important.

  • Page 19: Cleaning Procedure

    Diaphragm Chip FIGURE 9-1. Tip of the CS526 probe 3. Rinse thoroughly with deionized water. 4. Revitalize the probe (Section 9.1.3, Revitalizing (p. 12) 5. Calibrate the probe (Appendix , Calibration (p.

  • Page 20: Cleaning Tips

    CS526 ISFET pH Probe 9.1.2.1 Cleaning Tips • To avoid scratches on the sensor surface, rinse the probe thoroughly using water before cleaning the probe with the soft brush supplied with the meter and tap water with a mild detergent added. Most scratches on the sensor are caused when there are hard particles in the sample and the sample is rubbed into the sensor when cleaning with the toothbrush.

  • Page 21: Importing Short Cut Code

    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 CRBasic Editor.

  • Page 23: Example Program

    Appendix B. Example Program The following is a CR1000 program that measures the CS526. This program assumes the CS526 is connected to COM1 (C1 / TX and C2 / RX) on the CR1000. 'CR1000 Series Datalogger 'Declare variable for digital pH measurement...

  • Page 25: Calibration

    6. Place the CS526 in a pH-4 buffer solution (pn 25587). 7. Allow the [pHmV] reading to stabilize. 8. Change the value in [pH4record] to –1. 9. Change the value in [pHcal] to –1. 10. The CS526 is now ready to be placed in the solution to be measured.

  • Page 26: Example Calibration Program

    Appendix C. Calibration C.1 Example Calibration Program Following is a simple example program to facilitate the two-point calibration. Although this is a CR1000 program, the other dataloggers are programmed similarly. 'CR1000 Series Datalogger 'Define Variables Public pH, pHCount Public PTemp, batt_volt Public pH4record, pH4Count Public pH7record, pH7Count Public pHcal, pHmult1...
  • Page 28 • info@campbellsci.com.cn • info@campbellsci.de www.campbellsci.com www.campbellsci.de Campbell Scientific do Brasil Ltda. (CSB) Campbell Scientific Spain, S. L. (CSL Spain) Rua Apinagés, nbr. 2018 ─ Perdizes Avda. Pompeu Fabra 7-9, local 1 CEP: 01258-00 ─ São Paulo ─ SP 08024 Barcelona...

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