SLOPE INDICATOR GTecLink Manuel utilisateur

GTecLink

Dataloggers

Manual

About this document

1. Datalogger Installation 4

1.1 Equipment

1.2 Powering the data logger 1.3

Safely closing the data logger 1.4

Data logger mounting 10

2. Datalogger Configuration 11

2.1 STEP 1: Connect GTecLink Android application 2.2

STEP 2: GTecLink main menu

2.4 STEP 3: Sensor configuration

Vibrating Wire Nodes (526160xx)

GeoFlex Nodes (5780170x)

Analog Node (57804800)

2.5 STEP 4: Sensors Data

2.6 STEP 5: Radio configuration

2.7 STEP 6: Radio signal coverage test 2.8

STEP 7: Test results interpretation 20

3 GTecLink Dataloggers 21

3.1 Vibrating Wire Loggers 21

3.1.1 Sensor connection

3.1.2 Barometric measurements

3.1.3 Battery lifespan

3.1.4 Configuration

3.1.5 Data storage 23

3.2 GeoFlex Loggers 24

GTecLink Datalogger Manual

24 3.2.1 Sensor Connection

3.2.2 Battery lifespan 26

a) Geosense / RST IPI

b) Sisgeo IPI

c) MDT Multi-Point-Borehole-Extensometers (MPBX) 27

3.2.3 Configuration

3.2.4 Data storage

3.3 Analog Logger 29

3.3.1 Sensor Connection

3.3.2 Battery lifespan 3.3.3

Configuration 3.3.4 Data

storage 34

4. DATA ACQUISITION

5. CONTACT DGSI 36

GTecLink Datalogger Manual

About this document

This user guide explains the basic procedures for data acquisition with the GTecLink family of dataloggers

by DGSI and powered by Loadsensing. Further technical description is available in the datasheets.

The family of GTecLink data loggers by DGSI consists of six different dataloggers that may be used as

standalone data loggers (without remote communication) or radio dataloggers (with remote communication

through a gateway). Please note that we will use the terms datalogger and node interchangeable within this

manual. The models available are:

Data loggers

●52616001 - One Channel VW Datalogger, Polycarbonate

●52616011 - One Channel VW Datalogger, Aluminum

●52616015 - Five Channel VW Datalogger, Aluminum

●57801700 - GeoFlex Datalogger & Enclosed Power Supply

●57801705 - GeoFlex Datalogger

●57804800 - Four Channel Analog Datalogger

GTecLink Datalogger Manual

1. DATA LOGGER INSTALLATION

1.1 Equipment

GTecLink dataloggers are shipped with the following accessories:

-Datalogger

-Antenna

-Antenna adapter

-RTC battery (if applicable)

Not included:

-USB-OTG configuration cable

-Batteries

-Sensor surge protection

-Grounding protection

-Mounting supports (if needed)

GTecLink Datalogger Manual

1.2 Powering the data logger

The data logger arrives closed and without batteries installed. In order to initialize it, the user should

follow these steps:

a. Openthedatalogger(usinga2.5mmAllenwrench)followingtherecommendedpositions

(Figure 1) in order to avoid damaging the lateral gore valve. The batteries are inserted into the

cover, so be careful not to snap the cable between the cover and the main board.

Figure 1: View of the recommended positions to open the datalogger

b. InserttheRTCbattery(smallbatteryincluded).Firstremovetheupperenclosureofthe battery holder (Figure

2). Polarity is indicated inside the holder.

Figure 2: Removal of the upper enclosure of the battery holder

GTecLink Datalogger Manual

The RTC battery keeps time in the data logger regardless of whether or not C-type batteries are also

inserted. The data logger always uses UTC time. However, the data can be visualized in local time in the

gateway or the Android configuration app. RTC battery is only available formultichannel dataloggers.

c. Insert C-type batteries in the battery holders. Between one and fourbatteriescanbe connected.

Polarity is indicated (see Annex 4 for further information on the batteries).

Note



: The device has reverse battery protection but it is not safe to keep batteries reversed in the

datalogger for a long time.

WARNING: RISK OF EXPLOSION IF INCORRECT BATTERIES ARE USED. DISPOSE OF BATTERIES

ACCORDING TO THE INSTRUCTIONS. THIS EQUIPMENT SHOULD BE INSTALLED IN

RESTRICTED ACCESS AREAS.

d. Check thatpowerswitch(SWA,Figure3)isinthecorrectposition.

USB:thedataloggeris powered by the USB cable connected to any Android device

BATT (default): the datalogger is powered by the batteries.

Note



:SomeAndroiddevicescannotpowerthedatalogger,especiallywhenperforming a reading. If

reading fails, set the switch to BATT mode in order to power the datalogger with batteries.

Figure 3: Detail of power switch (SW A)

GTecLink Datalogger Manual

1.3 Sensor connection

Sensors are connected to the datalogger at the terminal blocks. Each terminal block corresponds to one

channel of the data logger. The terminal blocks accept wires that are prepared by stripping a short length of

insulation from the end.

Each data logger type has specificinstructionsforsensorwiring.Specificationsforeachmodel can be

found in sections: 3.1. (vibrating wire dataloggers), 3.2. (digital dataloggers) and 3.3. (analog

datalogger).

GTecLink Datalogger Manual

1.3 Safely closing the datalogger

This is a very important step to ensure watertightness and durability of the logger. Close the cover by

cross-screwing to the indicated torque 2.5 N.m.

The GTecLink family of data loggers by DGSI have undergone watertightness testing by an external

laboratory and is rated IPX7 (1 meter for 30 minutes) and IPX8 for extended immersion (1 meter for 7 days).

To guarantee watertightness, you must be sure that:

●The box is closed in a cross-shaped order after sensorconnection.Allthescrewsmust first be

inserted and screwed in until they are connected to the box and then adjusted using the torque

wrench. If these steps are not followed, the base faces and cover may be not be parallel, screwing

may become more difficult and the screw threads or the Helicoil inserts may be damaged.

Moreover, the toric joint (seal) may not be properly sealed and the degree of protection against

water intrusion (IP) could not be guaranteed.

●The box is screwed at 2 N.m (for single channel dataloggers) or 2.5 N.m (for multiple

channel dataloggers) using a torque screwdriver (e.g. Ref. 1227107 from WERA).

GTecLink Datalogger Manual

●The cable glands are closed with a 19 mm open spanner (e.g. Bahco 19 mm Single Ended Open

Spanner; RS Amidata code 717-8992) and the internal nut is held with a 22 mm open spanner (e.g.

Bahco 22 mm Single Ended Open Spanner; RS Amidata code 717-8995).

●A piece of rubber rod to seal the unused cable glands is provided in each box.

●The antenna is mounted. If it is not, the antenna connector should be covered with a cap.

●The sealing ring has not been manipulated either physically or chemically.

●The sealing cap USB connector is coiled.

If any of these conditions are not met, or if one or several components (e.g. gore valve) are damaged,

IPX7 and IPX8 ratings cannot be guaranteed.

Should the datalogger need further sealing due to placement in an extreme environment or in a floodable

manhole, additional sealants will be required to close the box (e.g. Sikaflex products). 

Note: Box screws shouldn’t be torqued more than 2.5 N.m, even though they can support a maximum torque of

3.5 N.m. If the torque is exceeded, the Helicoil insert may be damaged. We do not recommend using electric

drills or electric screwdrivers.

GTecLink Datalogger Manual

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