Sentek SDI-12 Manuel utilisateur

I-

-1

Version 1.0

Sentek Slimline SDI-12 Probe Manual

transmitted in any form electronic or mechanical for any purpose whatsoever without the prior written

consent of Sentek Pty Ltd. All intellectual and property rights remain with Sentek Pty Ltd.

All information presented is subject to change without notice.

Sentek™, Drill & Drop™, EnviroSCAN™, EasyAG™, TriSCAN™, and IrriMAX™ are trademarks or

registered trademarks of Sentek Pty Ltd that may be registered in one or more jurisdictions.

Sentek Pty Ltd

A.C.N. 007 916 672

77 Magill Road

Stepney, South Australia 5069

Phone: +61 8 8366 1900

Facsimile: +61 8 8362 8400

Internet: http://www.sentektechnology.com

Email: [email protected]

Slimline SDI-12 Probe Rev 1.0 (2020-05-08)

Sentek Slimline SDI-12 Probe Manual

Sentek - Statements of Compliance

FCC note of compliance and statement of liability

This equipment has been tested and found to comply with the limits for a Class B digital device,

pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against

harmful interference in a residential installation. This equipment generates, uses, and can radiate radio

frequency energy and, if not installed and used in accordance with the instructions, may cause harmful

interference to radio communications. However, there is no guarantee that interference will not occur

in a particular installation. If this equipment does cause harmful interference to radio or television

reception, which can be determined by turning the equipment off and on, the user is encouraged to try

to correct the interference by one or more of the following measures:

•Reorientation or relocation of the receiving antenna.

•Connection of the equipment into an outlet on a circuit different from that to which the receiver

is connected.

•Consultation with the dealer or an experienced radio/TV technician.

EMC approvals

The Slimline SDI12 system is in compliance with the following specifications:

CISPR 11:2010 Ed 5.1

Industrial Scientific and Medical (ISM) radio-frequency equipment –Electromagnetic disturbance characteristics –

Limits and methods of measurement

IEC 6132601:2012 Ed 2

Electrical equipment for measurement, control and laboratory use –EMC requirements. Part 1: General requirements.

FCC Part 15 Subpart B

Radio Frequency Devices –Unintentional Radiators

RoHS

EN 50581:2012

Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous

substances.

Marking

The above EMC approvals allow the product to be marked CE, C-tick and FCC.

Modifications

Any modifications to any part of the equipment or to any peripherals may void the EMC compliance of

the equipment.

Radio Interference

The probe is not to be operated in free air as it may cause interference to radio communication devices

Sentek Slimline SDI-12 Probe Manual 
Copyright © 2001 –2020 Sentek Pty Ltd All rights reserved Page iii 
Table of Contents 
Sentek - Statements of Compliance ..................................................................... ii 
FCC note of compliance and statement of liability ........................................................ii 
EMC approvals ....................................................................................................................ii 
RoHS .....................................................................................................................................ii 
Marking..................................................................................................................................ii 
Modifications........................................................................................................................ii 
Radio Interference ...............................................................................................................ii 
The Slimline Probes..............................................................................................1 
About.....................................................................................................................................1
Overview...............................................................................................................................1
References.............................................................................................................................1
SDI-12 probes ......................................................................................................................2
Cables ...............................................................................................................................2
Sentek Probe Configuration Utility ..................................................................... 3 
Setting the SDI-12 Address...........................................................................................3
About the SDI-12 Communication .............................................................................3
SDI-12 Probe cable .............................................................................................................3
SDI-12 Probe Programming cable...............................................................................4
Installation and setup of the Slimline probe........................................................ 5 
Configuring SDI-12 probes................................................................................................5
Slimline Probe Technical Specifications ............................................................. 6 
Slimline SDI-12 Technical Specifications.........................................................................6
Time to Sample Sensors: ...............................................................................................6
Current consumption:....................................................................................................7
Maintenance......................................................................................................... 8 
Storage ...................................................................................................................................8
Cable ......................................................................................................................................8
Connectors............................................................................................................................8
 
 

Sentek Slimline SDI-12 Probe Manual

Page 1

The Slimline Probes

About

Sentek 150cm Slimline SDI-12 probes are a fully sealed soil probe, for measuring soil water content,

temperature and optionally, salinity. They are designed for slurry installation into the ground.

Sensors and electronics are encapsulated in the probe plastic with a resin, to prevent water intrusion

and to strengthen the probe.

The Probe is similar in functionality to Sentek Drill & Drop probes but it is not tapered.

The sensors inside the probe use capacitance (FDR) technology.

Slimline probes with side-entry cable can be completely buried. There is also a top-entry detachable

cable.

Probe Length

150cm/60"

Number of Sensors

Outer Probe Diameter

32 mm

Connection Protocols

Available

SDI-12

Resolution

Moisture = 1:9000

Salinity = 1:2900

Temperature = 0.3°C

Moisture Precision

±0.03% vol.

Temperature Accuracy

±2 °C @ 25 °C

Operating

Temperature

-20°C to +60°C

Overview

This manual covers the physical Characteristics of Slimline probes and should be used in combination

with the Sentek Drill & Drop SDI-12 Series III Probe Manual.

The Sentek Slimline probe has all the interface and electronics encapsulated in the probe rod.

The probe has a cable suitable for connection to an SDI-12 third party logger. Configuring the probe

via the Probe Configuration utility (PConfig) also uses this cable.

References

•Sentek Probe Configuration Utility

•TriSCAN Agronomic User Manual

•Sentek Drill & Drop SDI-12 Series III Probe Manual

Sentek Slimline SDI-12 Probe Manual

Page 2

SDI-12 probes

Top-entry removable Connector

Side-entry Permanent connection

The SDI-12 probe consists of the probe rod, containing both the interface and sensors, with a

permanently wired cable into the side of the probe, or a cable plugged into the top of the probe. The

cable terminates in a three-pin connector. A 30 cm tail, with a matching 3-pin connector, plugs into the

5.0 m cable. The tail has bare wires suitable for connection to a third-party logger.

Although the SDI-12 probe comes fully configured, the configuration can be changed with PConfig

connected through a special PConfig programming cable plugged into the 5.0 m cable connector.

The cable has an attached label showing the wire colors, Moisture (M) or Salinity (S) and the probe

serial number. The Serial number is also present on side entry probes. The square QR bar code allows a

mobile device to scan and take you to the IrriMAX Live web site.

Cables

•Side-entry, non-removable 5m SDI-12 probe cable with male M16 connector

•Removable 5m SDI-12 probe cable with a three-pin matching probe connector on one end and

male M16 connector on the other end

•30 cm SDI-12 Logger cable with female M16 connector, terminated in bare ends

•SDI-12 Probe Programming Cable with female M16 connector (for Probe Configuration Utility

and firmware reprogramming) - ordered separately - Product Number: 06037.

Sentek Slimline SDI-12 Probe Manual

Page 3

Sentek Probe Configuration Utility

Warning:

Probes are supplied pre-normalised. Modifying normalization information stored in the Slimline probe

may result in incorrect sensor readings.

The Probe Configuration Utility (PConfig) allows changing of each sensor's depth, normalization

values (air and water counts) and calibration information. This information, stored in non-volatile

memory, is used to produce the calculated value (using the probe's calibration formula) for each sensor

on the probe.

It is not necessary to configure the sensors or normalise Slimline probes, they are sold fully

preconfigured and normalised. An optional SDI-12 Probe Programming cable is available if required.

See the Probe Configuration Utility manual or its online help for further information.

Setting the SDI-12 Address

Slimline SDI-12 probes are preconfigured to SDI-12 address 0.

If multiple probes are on the one SDI-12 bus it will be necessary to use either your SDI-12 logger or

PConfig to change the SDI-12 address of the probe in the range "0" to "9", "A" to "Z" and "a" to "z".

Note:

PConfig Sensor Test tab page only shows the calibrated value for SDI-12 probes.

About the SDI-12 Communication

See the Sentek Drill & Drop SDI-12 Series III Probe Manual for a description of SDI-12 power sequence,

timing and the SDI-12 command set.

The SDI-12 probe is supplied with a 5m cable terminated with a 3-pin water-proof (IP67) M16 male

connector and a companion 30cm SDI-12 logger cable with female M16 connector and 3 bare wires to

connect into your SDI-12 logger. The probe cable has an attached label showing the probe Serial

Number. This number matches the number stored in the probe (SDI-12 command aI! and shown in

PConfig field Probe Info Serial Number).

Caution:

Damage to the Slimline cable or loose connectors may result in moisture entering the cable, resulting in

corrosion and cable failure.

SDI-12 Probe cable

The side-entry 5m probe cable is integrated into the probe and cannot be removed. The Top connector

allows the cable to be removed. The M16 connectors must be (with fingers) tightly screwed together to

prevent the entry of moisture. If wanted the connector can be removed and the cable wired directly to

the SDI-12 logger.

Please contact Sentek if you require connectors to extend the cable beyond 5 m.

Sentek Slimline SDI-12 Probe Manual

Page 4

M16, 3-pin, Rigoal connectors

An SDI-12 probe requires connection to a third-party SDI-12 logger, consequently the 30 cm SDI-12

logger cable is terminated in three bare wires.

SDI-12 Cable

+Vin

DATA

3-wire cable

Red

Green

White

SDI-12 Probe Programming cable

This cable's female M16 connector is compatible with the male M16 connector on the SDI-12 probe

cable. The cable is not waterproof - Product Number: 06037.

Sentek Slimline SDI-12 Probe Manual

Page 5

Installation and setup of the Slimline probe

Physical installation at the desired field location should use a slurry installation method.

Note:

Slimline probes are preconfigured, therefore the sensors do not need Auto-detecting, depths set, or

normalisation.

Configuring SDI-12 probes

This Probe Configuration Utility (PConfig) runs through the SDI-12 connector. You must use the SDI-

12 Programming cable.

Note:

If PConfig is not installed on your computer, the installation steps are described in the Sentek Drill &

Drop SDI-12 Series III Probe Manual.

1. Unplug the SDI-12 logger from the probe cable (if needed).

2. Plug the SDI-12 programming cable into the 3-pin connector on the probe cable.

3. Plug the USB connector on the Probe programming cable into a USB port on your computer. The

probe is powered through the USB 5V supply.

4. Run PConfig on your computer, select Baud rate Auto, or 1200, and connect to the relevant USB

COM port. PConfig connects at 1200 baud and uses the SDI-12 communication protocol.

5. If the probe will be used in a multi-drop arrangement (a series of probes on one SDI-12 cable),

change the SDI-12 probe address to a unique address for each probe, i.e. 0-9, A-Z and a-z. Consult

your SDI-12 logger installation instructions for any constrains.

Caution:

PConfig does not support multi-drop, disconnect other probes from the SDI-12 cable while

configuring each probe.

Note: Not all capabilities of Probe Configuration Utility can be utilised on SDI-12 Slimline Probe.

•Depths (5, 15, 25 etc) are shown on the Configuration tab. PConfig can change the depths if

required e.g. first sensor below ground level

•Detected sensors cannot change, therefore Auto-Detect Sensors is not available

•Air and water normalisation can only be performed simultaneously for all sensors (not

individually)

•Salinity sensor calibration coefficients (ABC) cannot be changed

Note:

The standard Sentek normalisation container is not suitable for Slimline probes and cannot be used for

water normalisation. After updating the probe firmware, if you cannot restore the configuration for a

previously saved backup Configuration you must use a water container long enough to fully cover all

sensors at the same time. It must also have sufficient clearance around each sensor, i.e. no cable or

container wall.

Sentek Slimline SDI-12 Probe Manual

Page 6

Slimline Probe Technical Specifications

Slimline SDI-12 Technical Specifications

The probe rod encapsulates all sensors and electronics. You cannot disconnect the side-entry cable

from the probe rod. The top entry cable can be removed.

SDI-12 Protocol: Version 1.3

Moisture Sensor Resolution: 1:9000

Moisture Sensor Precision: ±0.03% vol.

TriSCAN Sensor Resolution: 1:2900

Temperature Sensor Accuracy: ±2 °C @ 25 °C.

Temperature Sensor Resolution: 0.3 °C.

Temperature range (operating): -20 °C to +60 °C.

Voltage Supply (+Vin): 2.7V to 15 Volts DC, Nominal 12V

Note: The probe can operate below 5V but will still drive the SDI-12 data line at the 5V SDI-

12 specification so the logger will also need to be 5V tolerant. Above 15V the probe will draw

higher current (up to about 100 mA). If operated above 15V for extended time permanent

damage may result.

Time to Sample Sensors:

You can use the following table together with the following current consumption graph to estimate the

sampling energy requirement. These values are for the 1.1.3 firmware revision.

SDI-12

Command

Sensor type and

Sensors sampled

Measurement Time

(ms)

Moisture values 1 –15

2550

C1!

Salinity values 10 –15

3045

C2!

Temperature values 1 –15

660

Moisture values 1 –9

1530

M1!

Moisture values 10 –15

1020

M2!

Salinity values 1 –9

1827

M3!

Salinity values 10 –15

1218

M4!

Temperature values 1 –9

396

M5!

Temperature values 10 –15

264

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