Campbell CS547A Manual de usuario

Revision: 02/2022

Campbell Scientific, Inc.

Table of contents

1. Introduction 1

2. Precautions 1

3. Initial inspection 1

4. QuickStart 1

5. Overview 4

5.1 EC sensor 5

5.2 Conductivity interface 5

6. Specifications 6

6.1 CS574A probe 6

6.2 Temperature sensor 7

6.3 A547 interface 7

7. Installation 8

7.1 Site selection 8

7.2 Mounting 8

7.3 Wiring 8

7.4 Programming 9

7.4.1 EC measurement 10

7.4.2 Ionization correction 10

7.4.3 Temperature measurement 10

7.4.4 Correct EC measurement for temperature errors 11

7.4.5 Output processing 11

8. Operation 12

8.1 Calibration 12

8.1.1 Conversion factors 12

8.1.2 Typical ranges 12

8.1.3 Factory calibration 12

8.1.4 Field calibration 12

8.2 Deriving a temperature compensation coefficient 13

8.3 Analysis of ionization-error correction 13

Table of Contents - i

8.4 Schematics 14

9. Maintenance 15

Appendix A. Importing Short Cut code into CRBasic Editor 16

Table of Contents - ii

1. Introduction

The CS574A probe monitors the electrical conductivity (EC) and temperature of fresh water. It

connects to a Campbell Scientific data logger using the A547 interface. This probe is compatible

with most Campbell Scientific data loggers.

NOTE:

This manual provides information only for CRBasic data loggers. For retired Edlog data logger

support, see an older manual at www.campbellsci.com/old-manuals .

2. Precautions

lREAD AND UNDERSTAND the Safety section at the back of this manual.

lThe CS574A and A547 are precision instruments. Please handle them with care.

lCAUTION: Rapid heating and cooling of the CS574A, such as leaving it in the sun and then

submersing it in a cold stream, may cause irreparable damage.

lDo not use the CS574A with long cable lengths in an electrically noisy environment.

3. Initial inspection

lUpon receipt of the CS574A and A547, inspect the packaging and contents for damage.

File damage claims with the shipping company.

lImmediately check package contents against the shipping documentation. Contact

Campbell Scientific about any discrepancies.

4. QuickStart

A video that describes data logger programming using Short Cut is available at:

www.campbellsci.com/videos/cr1000x-data logger-getting-started-program-part-3 .Short

Cut is an easy way to program your data logger to measure the sensor and assign data logger

CS574A Conductivity and Temperature Probe and A547 Interface 1

wiring terminals. Short Cut is available as a download on www.campbellsci.com . It is included

in installations of LoggerNet,RTDAQ, and PC400.

The following procedure also shows using Short Cut to program the CS574A.

1. Open Short Cut and click Create New Program.

2. Double-click the data logger model.

3. In the Available Sensors and Devices box, type CS574A or locate the sensor in the Sensors

>Water >Quality >CS547A Conductivity and Temperature Probe folder. Double click on

the CS547A Conductivity and Temperature Probe. Type the Cell Constant Kc (printed on

the sensor label), Lead Length in Feet, and Temperature Correction (Deriving a

temperature compensation coefficient (p. 13)). Temperature defaults to degree Celsius. This

can be changed by clicking the Deg C box and selecting Deg F, for degrees Fahrenheit, or K

for Kelvin.

CS574A Conductivity and Temperature Probe and A547 Interface 2

4. Click on the Wiring tab to see how the sensor is to be wired to the A547 and data logger.

5. In Output Setup, type the scan rate, meaningful table names, and Data Output Storage

Interval. Click Next.

CS574A Conductivity and Temperature Probe and A547 Interface 3

6. Select the measurement and its associated output option.

7. Click Finish and save the program. Send the program to the data logger if the data logger

is connected to the computer.

8. If the sensor is connected to the data logger, check the output of the sensor in the data

display in LoggerNet,RTDAQ, or PC400 to make sure it is making reasonable

measurements.

5. Overview

One A547 interface is required for each CS574A when used directly with the data logger; multiple

CS574A probes can connect to one AM16/32B multiplexer and one A547 interface.

Electrical conductivity (EC) of a solution is a simple physical property, but measurements can be

difficult to interpret. This manual instructs the user how to make EC measurements with the

CS574A. Accuracy specifications apply to measurements of EC in water containing KCl, Na2SO4,

NaHCO3, and/or NaCl, which are typical calibration compounds, and to EC not yet compensated

for temperature effects.

Statements made on methods of temperature compensation or estimating dissolved solids are

included to introduce common ways of refining and interpreting data, but are not definitive.

Authoritative sources to consult include the USGS Water-Supply Paper 1473, The pH and

Conductivity Handbook published by OMEGA Engineering, physical chemistry texts, and other

sources.

CS574A Conductivity and Temperature Probe and A547 Interface 4

Features:

lCompatible with AM16/32-series multiplexers allowing measurement of multiple sensors

lRounded ends facilitate installation and removal

lEasy to clean

lCorrosion resistant

lWeighted option available for stand-alone submersion

lCompatible with Campbell Scientific CRBasic data loggers: CR6, CR1000X, CR800-series,

CR3000, CR1000

5.1 EC sensor

The CS574A consists of three stainless steel rings mounted in an epoxy tube (FIGURE 5-1 (p. 5)).

Resistance of water in the tube is measured by excitation of the center electrode with positive

and negative voltage. This electrode configuration eliminates the ground looping problems

associated with sensors in electrical contact with earth ground. Temperature is measured with a

thermistor in a three-wire half-bridge configuration.

FIGURE 5-1. CS574A Conductivity and Temperature Probe

5.2 Conductivity interface

The A547 interface (FIGURE 5-2 (p. 6)) consists of blocking capacitors and bridge completion

resistors housed in a metal case. Screw terminals are provided for connecting the data logger,

and a water conductivity probe or multiplexer. Keep the interface in a non-condensing

environment that is maintained within the temperature range of the unit. Typically, the A547 is

housed in the data logger enclosure.

CS574A Conductivity and Temperature Probe and A547 Interface 5

FIGURE 5-2. A547 Interface

6. Specifications

6.1 CS574A probe

Housing: Epoxy

Length: 89 mm (3.5 in)

Width: 25.4 mm (1 in)

Height: 19 mm (0.75 in)

Minimum pipe ID in which

CS574A fits: 28 mm (1.1 in)

Maximum cable length: 305 m (1000 ft). The sensor must be ordered with desired

length as cable cannot be added to existing probes.

Depth rating: 305 m (1000 ft) maximum

pH range: Solution pH of less than 3.0 or greater than 9.0 may damage

the stainless steel housing.

Electrodes: Passivated 316 SS with DC isolation capacitors.

Cell constant: Individually calibrated. The cell constant (Kc) is found on a

label near the termination of the cable.

Operating temperature range: 0 to 50 °C

CS574A Conductivity and Temperature Probe and A547 Interface 6

EC range: ~ 0.005 to 7.0 mS/cm

EC measurement error

Bridge measurement error: <1%

Calibration error: In KCl and Na2SO4, NaHCO3, and NaCl standard solutions

at 25 °C:

±5% of reading (0.44 to 7.0 mS/cm)

±10% of reading (0.005 to 0.44 mS/cm)

Ionization error of KCl and Na+

solutions after correction: < 2.0%, 0.45 to 7.0 mS/cm

< 8.0%, 0.005 to 0.45 mS/cm

Weight with 4 ft cable: 120 g (4.2 oz)

6.2 Temperature sensor

Thermistor: Betatherm 100K6A1

Range: 0 to 50 °C

Accuracy1

Worst case: ±0.4 °C ( –24 to 48 °C)

±0.9 °C ( –35 to 50 °C)

Interchangeability error: ±0.10 °C (0 to 50 °C)

±0.20 °C at –10 °C

±0.30 °C at –20 °C

±0.40 °C at –30 °C

±0.50 °C at –40 °C

Steinhart-Hart equation error: ≤±0.01 °C ( –35 to 50 °C)

1Overall probe accuracy is a combination of thermistor interchangeability, bridge-resistor accuracy, and error of the

Steinhart-Hart equation. Bridge resistors have 0.1% tolerance with a 10 ppm temperature coefficient.

Interchangeability is the principle component error.

6.3 A547 interface

Length: 64 mm (2.5 in)

Height: 46 mm (1.8 in)

Width: 23 mm (0.9 in)

CS574A Conductivity and Temperature Probe and A547 Interface 7

Tabla de contenidos

Otros manuales de Equipo de grabación de Campbell

Campbell

Campbell NL110 Manual de usuario

Campbell

Campbell SC32B Manual de usuario

Campbell

Campbell CNL100 Manual de usuario

Campbell

Campbell SC-IRDA Manual de usuario

Campbell

Campbell SC105 CS Manual de usuario

Campbell

Campbell AeroX Audio 105 Manual de usuario

Campbell

Campbell SC932A Manual de usuario

Campbell

Campbell SC32A Manual de usuario

Campbell

Campbell SC105 CS Manual de usuario

Campbell

Campbell AVW100 Manual de usuario

Campbell

Campbell AVW4 Manual de usuario

Campbell

Campbell NL241 Manual de usuario

Campbell

Campbell MD9 Manual de usuario

Campbell

Campbell SC-USB Manual de usuario

Campbell

Campbell SC932C 9-Pin Manual de usuario

Campbell

Campbell SDM-CAN Manual de usuario

Campbell

Campbell SC105 Manual de usuario

Campbell

Campbell SC929 RS232 Manual de usuario

Campbell

Campbell Campbell Scientific SC532A Manual de usuario

Campbell

Campbell SC-USB Manual de usuario

Campbell

Campbell SC932A Manual de usuario

Campbell

Campbell SC932C Manual de usuario

Campbell

Campbell SDM-SIO4 Manual de usuario

Campbell

Campbell SC32B Manual de usuario

Manuales populares de Equipo de grabación de otras marcas

KV2 Audio

KV2 Audio 500 Series Manual de usuario

Robotics Technologies

Robotics Technologies microBus-Cam II Manual de usuario

Seca

Seca 460 Manual de usuario

Cognex

Cognex MVS-8000 Series Manual de usuario

Mect

Mect MPNC006 Series Manual de usuario

Bad Caf

Bad Caf THE LEASH Manual de usuario

Strymon

Strymon NIGHTSKY Manual de usuario

Mitsubishi Electric

Mitsubishi Electric 16CH DIGITAL RECORDER DX-TL5000U Manual de usuario

Tews Technologies

Tews Technologies TPMC465 Manual de usuario

Honeywell

Honeywell Excel 50 Manual de usuario

SeaLevel

SeaLevel COMM+8.LPCI Manual de usuario

Arturia

Arturia AUDIOFUSE STUDIO Manual de usuario

Rukra

Rukra RK-1240 Manual de usuario

Samson

Samson SCOM Manual de usuario

Dynacord

Dynacord DPS260 Manual de usuario

Nice

Nice Core Manual de usuario

Pyle Pro

Pyle Pro PSS8 Manual de usuario

RF-System

RF-System TinyGate Manual de uso y cuidado