Campbell CS230 User manual

Revision: 08/2021

Campbell Scientific, Inc.

Table of contents

1. Introduction 1

2. Precautions 1

3. Initial inspection 1

4. QuickStart 2

5. Overview 4

6. Specifications 5

7. Installation 6

7.1 Siting 6

7.2 Mounting 8

7.3 Wiring 8

7.4 Programming 9

7.4.1 SDI12Recorder() instruction 9

7.4.2 Slow sequence program instructions 9

8. Operation 10

8.1 Sensor measurements 10

8.1.1 SDI-12 addressing 11

8.1.2 Metadata 13

8.2 Long cables 13

8.3 Power conservation 14

9. Maintenance, calibration, and troubleshooting 14

Appendix A. Importing Short Cut code into CRBasic Editor 16

Appendix B. SDI-12 sensor support 17

B.1 SDI-12 command basics 17

B.1.1 Acknowledge active command (a!) 18

B.1.2 Send identification command (al!) 18

B.1.3 Start verification command (aV!) 19

B.1.4 Address query command (?!) 19

B.1.5 Change address command (aAb!) 19

Table of Contents - i

B.1.6 Start measurement commands (aM!) 19

B.1.7 Stopping a measurement command 20

B.1.8 Send data command (aD0! … aD9!) 20

B.1.9 Continuous measurement command (aR0! … aR9!) 21

B.2 SDI-12 transparent mode 21

B.2.1 Changing an SDI-12 address 21

B.3 References 24

Appendix C. SGB3 electrical surge protector 25

C.1 SGB3 3-line surge protector specifications 25

C.2 SGB3 3-line surge protector mounting and wiring 25

Table of Contents - ii

1. Introduction

The CS230/CS231 temperature profiler provides temperature measurements both in a rigid

probe assembly and external probes using digital sensor technology. It uses the SDI-12

communication protocol to communicate with an SDI-12 recorder simplifying installation and

programming.

NOTE:

SGB3 Surge Protectors were shipped with older CS230 temperature profilers (serial numbers

< 1162). Newer CS230s (serial numbers ≥ 1162) and all CS231s include built-in surge

protection, and therefore do not need the SGB3. For more information, refer to SGB3

electrical surge protector (p. 25).

2. Precautions

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

lAlthough the CS230/CS231 is designed to be a rugged and reliable device for field use,

care should be taken when handling or moving it to avoid damage.

lThere are no user-serviceable parts and disassembling the device will void the warranty.

lThe black outer jacket of the cable is Santoprene® rubber. This compound was chosen for

its resistance to temperature extremes, moisture, and UV degradation. However, this jacket

will support combustion in air. It is rated as slow burning when tested according to U.L. 94

H.B. and will pass FMVSS302. Local fire codes may preclude its use inside buildings.

3. Initial inspection

lUpon receipt of the CS230/CS231, inspect the packaging and contents for damage. File

damage claims with the shipping company.

lThe 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.

CS230/CS231 Temperature Profilers 1

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

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 CS230/CS231.

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 CS231 or locate the sensor in the Sensors >

Temperature folder. Double-click CS230/CS231 SDI-12 Temperature Profiler. Type the

correct Starting SDI-12 Address for the first external probe or the top temperature point in

the rigid probe if no external probes are included (SDI-12 addressing (p. 11)). Type the

Number of Result Sensors.

CS230/CS231 Temperature Profilers 2

4. Click the Wiring tab to see how the sensor is to be wired to the data logger. Click OK after

wiring the sensor.

5. Repeat steps 3 and 4 for other sensors.

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

Interval.

CS230/CS231 Temperature Profilers 3

7. Select the measurement and its associated output option.

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

is connected to the computer.

9. 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

The CS231 offers the same precise temperature profiling as our CS230 SDI-12 Temperature

Profiler, but designed for easier use in borehole and road applications. The two profilers have the

same programming, wiring, and measurement specifications.

The CS230/CS231 temperature profiler uses digital sensor technology allowing for a simple

3-wire integration. The CS230/CS231 consists of a rigid probe assembly and up to four optional

external temperature probes. The rigid probe assembly maintains the precise position of the

temperature points within the profile, while protecting the temperature sensors in all mediums.

The CS230/CS231 is suited for a wide variety of applications and environments. The completely

sealed probe assembly and external probes permits the CS230/CS231 to be used in roadbeds,

soils, and water (snow and ice).

Examples of some applications include spring load adjustment, frost and permafrost monitoring,

soil and water temperature profiling, and snowpack temperature profiling.

CS230/CS231 Temperature Profilers 4

Features:

lAccurate and stable measurements

lEach sensor is individually addressed and referenced to its depth

lLow power consumption

lDigital SDI-12 output

lCompatible with the following data loggers: CR6, CR3000, CR1000X, CR800 Series,

CR300Series, CR1000

6. Specifications

Operating range: –55 to 85°C

Accuracy

Typical: ±0.2°C over –40 to 85°C,

Worst case: ±0.4°C over –40 to 85°C;

±0.5°C over –55 to –40°C

(includes lifetime drift of sensor)

Resolution: 0.0078°C

Output protocol: SDI-12 1.3

Measurement update interval: 1 s (automatic), occurs in quiescent mode

Warm-up time: 10 s

Time constant (ice bath)

External probe: 60 s

Tee sensor: 720 s

Second sensor from tee: 420 s

Remainder of profiler: 300 s

Maximum sensors per probe: 32 sensors in rigid probe assembly,

4 external sensors

External probe length: 45 cm (18 in)

Supply voltage: 9 to 28 VDC

CS230/CS231 Temperature Profilers 5

Current Consumption

Quiescent: # sensors • 1.0 mA (max)

Active (during SDI-12 communications): 20 mA + (# sensors • 1.0 mA)

Main diameter: 2.13 cm (0.84 in)

Maximum length: 3.0 m (118 in)

Maximum cable length: 152 m (500 ft)

Minimum sensor spacing: 5 cm (1.97 in) in rigid probe assembly

EU Declaration of Conformity: View at www.campbellsci.com/cs230-l or

www.campbellsci.com/cs231-l

7. Installation

If you are programming your data logger with Short Cut, skip Wiring (p. 8) and Programming (p.

9). Short Cut does this work for you. See QuickStart (p. 2) for a Short Cut tutorial.

7.1 Siting

Install the CS230/CS231 directly in the medium that is to be measured. The types of medium that

can be measured are varied, including soils, roadbeds, and water. To make the most

representative measurement, it is important that consistent contact be made between the

temperature profiler and the medium.

The location of the temperature profiler should be representative of the intended application.

Typically, the first measurement point in the rigid assembly should have a minimum burial depth

of 20 cm. This helps protect the sensor from damage in roadbed applications, and helps secure

the sensor against frost heaving. Use the external probes for measurements at shallower depths.

The external probes are sheathed in a stainless-steel housing to protect them against possible

damage.

The installation depth of the rigid assembly is referenced at the first measurement point in the

assembly (shown in FIGURE 7-1 (p. 7), Internal Sensor Position #4). This information needs be

addressed as part of the sensor configuration process.

CS230/CS231 Temperature Profilers 6

FIGURE 7-1. CS231 installation example with three external sensors and five internal sensors

NOTE:

FIGURE 7-1 (p. 7) is an example configuration with three external sensors and five internal

sensors. Each profiler is custom built to the user’s specific requirements.

FIGURE 7-2 (p. 7) shows the label for the first and last internal sensor locations.

FIGURE 7-2. Internal sensor label

CS230/CS231 Temperature Profilers 7

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