OTT ecoLog 800 User manual

Operating instructions
Groundwater Datalogger
OTT ecoLog 800
OTT ecoLog 800 3G
English

These operating instructions describe the groundwater datalogger
 OTT ecoLog 800
 OTT ecoLog 800 3G
The following naming conventions are used to distinguish between the different
device variants within the description:
OTT ecoLog 800 (3G) ➝applies to both device variants
OTT ecoLog 800 ➝applies to OTT ecoLog 800 only
OTT ecoLog 800 3G ➝applies to OTT ecoLog 800 3G only
These operating instructions (version "04-1016") cover the OTT ecoLog 800 (3G)
software versions
 OTT ecoLog 800 firmware: V 2.00.1 and later
 OTT ecoLog 800 3G firmware: V 1.00.0 and later
 OTT Water Logger Operating Program: V 1.70.0 and later
The OTT ecoLog 800 (3G) firmware can be found in the "Advanced operation"
mode, "OTT ecoLog 800 (3G)" window of the operating program. The version of
the operating program can be found via the "Info" function in the "Help" menu.
We reserve the right to make technical changes and improvements without notice.

Table of contents
1 Scope of supply 5
2 Order numbers 5
3 Basic safety information 7
4 Introduction 8
5 Installing, checking, and replacing batteries 10
5.1 Power supply using lithium batteries 12
5.2 Power supply using alkaline batteries (OTT ecoLog 800) 15
6 Inserting a SIM card 17
7 If required: Connecting an external radio antenna 18
8 Installing the OTT ecoLog 800 (3G) unit 19
8.1 Installing the unit into 2" observation wells, top cap with cut-out 20
8.2 Installing the unit into 3", 4" or 6" observation wells, top cap with
cut-out for adapter plate 21
8.3 Installing the unit into observation wells of 3" in diameter and above,
top cap without cut-out for adapter plate 23
8.4 Installing the unit into observation wells of 3" in diameter and above,
without top cap, universal installation 25
9 Setting OTT ecoLog 800 (3G) operating parameters 26
9.1 Installing the OTT Water Logger Operating Program 26
9.2 Establishing the P /OTT ecoLog 800 (3G) communication link (on site) 26
9.3 Establishing the communication link from remote (OTT ecoLog 800) 27
9.4 Setting OTT ecoLog 800 (3G) operating parameters 28
9.5 Saving/loading an OTT ecoLog 800 (3G) configuration 32
9.6 Importing/exporting an OTT ecoLog 800 (3G) configuration 32
10 Determining and displaying instantaneous values (Observer function) 34
11 Reading data 36
12 Exporting data 37
13 Displaying data 38
14 Protecting the OTT ecoLog 800 (3G) unit and the OTT Water Logger
Operating Program using a password 39
15 Setting date and time 41
16 Erasing the data memory 42
17 Updating the OTT ecoLog 800 (3G) firmware 42
18 Maintenance work 43
18.1 leaning the pressure probe 43
18.2 Replacing the desiccant capsules 44
18.3 hecking/replacing the batteries 45
18.4 alibrating the conductivity sensor 45
3

4
19 Error messages 47
20 Troubleshooting/remedy 47
21 Repair 49
22 otes about the disposal of old units 49
23 Technical data 50
Appendix A – ote on Declaration of Conformity 53

5
1 Scope of supply
 –1 groundwater datalogger consisting of a communication unit with built-in
GSM/GPRS cellular modem, pressure probe cable with pressure compen -
sation capillary and Kevlar core for longitudinal stabilization, 2 desiccant
capsules; pressure probe with integrated conductivity sensor and datalogger
– 1 lithium battery, DD type (26 Ah); or 1 lithium battery, D type (13 Ah); or
2 alkaline batteries (1.5 V), LR14 · AM-2 · MN 1400 · type, incl. battery holder;
– 1 operating instructions
– 1 factory acceptance test (FAT) certificate
 – 1 groundwater datalogger consisting of a communication unit with built-in
GSM/GPRS/UMTS/HSPA+ cellular modem, pressure probe cable with pressure
compensation capillary and Kevlar core for longitudinal stabilization, 2 desic-
cant capsules; pressure probe with integrated conductivity sensor and datalogger
– 1 lithium battery, DD type (26 Ah); or 1 lithium battery, D type (13 Ah);
– 1 operating instructions
– 1 factory acceptance test (FAT) certificate
2 Order numbers
 Groundwater datalogger
– incl. lithium battery, DD type (26 Ah) 55.447.001.9.0
incl. lithium battery, D type (13 Ah) 55.447.002.9.0
incl. 2 x 1.5 V alkaline type ( cell) 55.447.005.9.0
 Groundwater datalogger
– incl. lithium battery, DD type (26 Ah) 55.449.001.9.0
incl. lithium battery, D type (13 Ah) 55.449.002.9.0
Required ordering information
– Measuring range: 0 … 4 / 10 / 20 / 40 / 100 m
– System length: 2 … 200 m (±1 % ±5 cm)
 Accessories 1) Adapter plates
for OTT top caps with cut-out
– 3" 55.446.022.9.2
– 4" 55.446.023.9.2
– 4,5" 55.446.024.9.2
– 5" 55.446.225.9.2
– 6" 55.446.026.9.2
Universal suspension bracket 55.446.021.9.2
for top caps from 3" upwards, without cut-out
as well as for universal installation
"OTT Water Logger Software CD-ROM" 56.572.002.9.7
OTT Water Logger Operating Program for P , and
OTT ecoLog 800 (3G) operating instructions (PDF file)
External radio antenna
cable length: 0.5 m 97.980.062.9.5
cable length: 1.0 m 97.980.061.9.5
cable length: 1.5 m 97.980.060.9.5
5-sided key 20.250.095.4.1
for locking OTT top caps
Optical OTT DuoLink reading head 55.520.017.4.2
Optical reading head OTT IrDA link USB 55.520.026.9.2
Calibration container 55.445.025.9.2
1) Additional accessories – e.g. plastic top caps, top caps with external or internal radio antenna on request.
OTT ecoLog 800
OTT ecoLog 800
OTT ecoLog 800 3G
OTT ecoLog 800 3G

 Lithium battery, DD type (26 Ah) 97.800.011.9.5
Lithium battery, D type (13 Ah) 97.800.009.9.5
Battery holder 1) for 55.446.020.9.2
2 alkaline batteries (1.5 V), batteries not included
Alkaline batteries 1), 2x 96.800.003.9.5
LR14 · AM-2 · MN 1400 · type
Desiccant capsules 97.100.296.9.5
2x in one aluminum bag
Conductivity calibration solution
– 0,1 mS/cm; 1000 ml 55.495.350.9.5
– 0,5 mS/cm; 946 ml 55.495.351.9.5
– 1,412 mS/cm; 1000 ml 55.495.352.9.5
– 12,856 mS/cm; 946 ml 55.495.353.9.5
– 47,6 mS/cm; 1000 ml 55.495.354.9.5
1) for OTT ecoLog 800 (not usable for OTT ecoLog 800 3G)
Spare parts/
Consumables
6

3 Basic safety information
 Read these operating instructions before using the OTT ecoLog 800 (3G) for
the first time! Become completely familiar with the installation and operation of
the OTT ecoLog 800 (3G) and its accessories! Keep these operating instructions
for later reference.
 The OTT ecoLog 800 (3G) is designed to measure groundwater levels, the
water temperature and the specific conductivity of the groundwater and to
transmit these measured values through a GSM cellular network. Only use the
OTT ecoLog 800 (3G) as described in these operating instructions!
For further information ➝ refer to hapter 4, "Introduction".
 Please note all safety and warning information given within the individual work
steps. All safety and warning information given in these operating instructions
are marked by the following adjacent warning signals:
–Black warning triangle ➝ warning of potential damage to the unit,
reduced functionality and particularly noteworthy points.
– Black warning triangle with yellow background ➝ there is a
health hazard! Detailed information on the hazard including information on
how to prevent the hazard and possible consequences of non-observance.

Ensure the electrical, mechanical, and climatic specifications listed in the technical data
are adhered to. For further information ➝ refer to hapter 23, "Technical data".
 When operating the OTT ecoLog 800 (3G), keep a minimum distance of
0.2 metres between radio antennae and
– people, as well as
– other electrical equipment/antennae
 Handle the pressure probe cable with care. Do not kink the cable or pull it
across sharp edges!
 Do not make any changes or retrofits to the OTT ecoLog 800 (3G)! If changes
or retrofits are made, all guarantee claims are voided.
 Have a faulty OTT ecoLog 800 (3G) inspected and repaired by our repair
center. On no account carry out repairs yourself!
For further information ➝ refer to hapter 21, "Repair".
 After putting the unit out of service, properly dispose of the OTT ecoLog 800 (3G).
On no account put the OTT ecoLog 800 (3G) into the normal domestic waste. For
further information ➝ refer to hapter 22, "Note about the disposal of used units".
Federal Communications Commission (FCC) Approval
Note: This equipment has been tested and found to comply with the limits for a lass
A digital device, pursuant to part 15 of the F Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Oper -
ation of this equipment in a residential area is likely to cause harmful interference in
which case the user will berequired to correct the interference at his own expense.
Industry Canada Approval
This lass A digital apparatus complies with anadian I ES-003.
et appareil numérique de la classe A est conforme à la norme NMB-003 du
anada.
CAUTIO
Risk of burns! Hot device surface at higher ambient temperatures!
The metal parts of OTT ecoLog 800 (3G) device surface can get very hot at
higher ambient temperatures1). This may lead to burns.
Use protection gloves during installation and maintenance at higher
ambient temperatures1)!
1) > approx. 60 ° / 140 °F
7

4 Introduction
The OTT ecoLog 800 (3G) groundwater datalogger is designed to precisely mea-
sure and store groundwater levels and temperatures, as well as the specific electri-
cal conductivity of the groundwater and to transmit these measured values through
a GSM cellular network. The OTT ecoLog 800 (3G) also calculates the salinity and
a TDS value (Total Dissolved Solids) based on the specific conductivity.
The pressure probe equipped with a relative pressure probe cell uses the hydrostatic
pressure of the water column to determine the water level. As a reference, a pres-
sure compensation capillary in the pressure probe cable provides the measuring
cell with the current ambient air pressure. Erroneous measurement results due to
atmospheric air pressure fluctuations are thus eliminated. The OTT ecoLog 800 (3G)
measures the specific electrical conductivity using a 4-electrode conductivity sensor
with inte grated temperature sensor. The measurement electrodes are made of
graphite.
The temperature compensation process for the conductivity measurement and the
reference temperature used can be chosen as well as the calculation method for
the salinity.
The OTT ecoLog 800 (3G) is available in five measuring ranges:
 0 … 4 m water column (0 ... 0.4 bar)
 0 … 10 m water column (0 ... 1 bar)
 0 … 20 m water column (0 ... 2 bar)
 0 … 40 m water column (0 ... 4 bar)
 0 … 100 m water column (0 ... 10 bar)
Based on a reference value that is input during startup, the OTT ecoLog 800 (3G)
default setting provides measurement results in the form of depth values. Alterna-
tively, levels or pressure values are possible. The measurement intervals (sample
intervals) can be preselected as necessary.
The operating parameters are set using the "OTT Water Logger Operating Pro-
gram" P software. This software allows the system to be conveniently and flexibly
tailored to a wide range of measurement requirements of a station. The software
can be set to provide a basic or an advanced user interface. The basic user inter-
face allows all settings to be adjusted within a single program window. In the
advanced user interface, the sample interval can be controlled e.g. by means of
limit events. The software also supports the execution of pumping tests.
The stored measured values are made available through an infrared interface
(IrDA) for wireless readout using P on which the OTT Water Logger Operating
Program is executed.
The OTT ecoLog 800 (3G) includes a built-in cellular modem (with SMA antenna
connector) that is used for remote data transfer and remote parameterizing1) via
the cellular network. The remote data transfer can be optionally carried out by
SMS text messages or transmission services GSM, GPRS, UMTS 2) or HSPA+ 2).
If necessary – e.g. when the signal strength of the cellular network is low at the
installation site – the factory installed radio antenna may be replaced by an exter-
nal one.
The OTT ecoLog 800 (3G) is installed by simply hanging it into observation wells
of 2" in diameter and above. For this purpose, various adapters/suspension
brackets are available as accessories. For power supply, three options are avail-
able: lithium battery, DD type, 26 Ah capacity; lithium battery, D type, 13 Ah
capacity; or commercial alkaline batteries (only OTT ecoLog 800 with dedicated
battery holder). When using the DD type lithium battery, battery lifetime is
(depending on additional parameters) at least 10 years, taking into account one
single remote data transfer per day. The communication unit of the OTT ecoLog
800 (3G) can withstand temporary flooding (for details, refer to hapter 23,
"Technical data").
1) only OTT ecoLog 800
2) only OTT ecoLog 800 3G
8

9
Top cap
Observation well
Communication unit
Pressure probe cable
Rubber stop
(don't move)
Pressure probe
with datalogger
Pressure sensor
DepthMeasuring range
Measuring ranges:
0 … 4 m, 0 … 10 m, 0 … 20 m,
0 … 40 m, 0 … 100 m Water column
System length
Conductivity sensor
Fig. 1: Setup of a groundwater
measurement station using the
OTT ecoLog 800 (3G).
The OTT ecoLog 800 (3G) essentially con-
sists of three components: communication
unit, pressure probe cable, and pressure
probe with datalogger.
OTT ecoLog 800 (3G) system length =
length of communication unit + cable
length + length of pressure probe with
datalogger. (The system length is required
when ordering an OTT ecoLog 800 (3G).
When setting the OTT ecoLog 800 (3G)
operating parameters, the system
length is not required.)
(The rubber stop attached to the pressure
probe cable prevents the pipe casing from
falling when the communication unit is open.)

5 Installing, checking, and replacing batteries
Suitable battery types
OTT ecoLog 800
 Lithium battery, DD type (26 Ah), (use OTT accessories only); or
 Lithium battery, D type (13 Ah), (use OTT accessories only); or
 2 alkaline batteries (1.5 V), LR14 · AM-2 · MN 1400 · type.
For using the alkaline batteries, a dedicated battery holder is required.
OTT ecoLog 800 3G
 Lithium battery, DD type (26 Ah), (use OTT accessories only); or
 Lithium battery, D type (13 Ah), (use OTT accessories only).
Battery lifetimes
The values mentioned below apply to the following conditions: sample interval –
1hour; one single remote data transfer per day; system length – 50 m.
 Lithium battery, DD type : at least 10 years,
 Lithium battery, D type : at least 5 years,
 Alkaline batteries1): at least 1 year (high quality battery types).
otes
 The OTT ecoLog 800 (3G) starts measuring after inserting the batteries (there is
no ON/OFF switch).
 If the OTT ecoLog 800 (3G) is to be shut off ➝remove the batteries. This will
prevent the batteries from draining prematurely and will stop any recording of
unusable measurements.
 When transporting the OTT ecoLog 800 (3G) ➝remove the batteries. This will
prevent the batteries from draining prematurely and will stop any recording of
unusable measurements.
 When bringing the unit back into operation, it takes – dependent on how much
data is stored – up to 7minutes until the OTT ecoLog 800 (3G) starts measur-
ing again.
1) for OTT ecoLog 800 (not suitable for OTT ecoLog 800 3G)
WAR I G
Improper handling of batteries involves fire or explosion hazard!
 Only use the battery types specified (no rechargeable types).
 Always use brand-new batteries. Do not mix used and new batteries.
 Do not mix batteries from different manufacturers
 Do not charge the batteries!
 Avoid short circuits!
 Avoid mechanical damage!
 Do not open batteries!
 Do not expose batteries to fire or to temperatures above 100 ° !
 Do not solder on the batteries!
 Properly dispose of exhausted batteries. Do not put them into domestic waste.
10

Check the battery voltage as follows
 Establish the P /OTT ecoLog 800 (3G) communication link,
refer to hapters 9.2 or 9.3.
 Select the "OTT ecoLog 800 (3G)" menu, "View Instantaneous values" function1)
➝The OTT ecoLog 800 (3G) starts an instantaneous value measurement ➝The
"Observer" window indicates the current battery voltage and the energy drawn
from the batteries so far in Ah.
 – Alkaline batteries2): riterion for replacing the batteries:
Battery voltage lower than about 1.9 V
➝Replace the batteries.
– Lithium batteries: riterion for replacing the batteries: Ah drawn
Lithium battery, DD type: > approx. 20 Ah
Lithium battery, D type : > approx. 10 Ah
➝Replace the batteries.
(For technical reasons, the battery voltage displayed cannot not be used as a
criterion for replacing lithium batteries.)
 lick on the "Exit" button.
 lose the operating program.
1) With suitable settings (Menu "File", function "Options"), the operating program starts with the
"Observer" window.
2)for OTT ecoLog 800 (not suitable for OTT ecoLog 800 3G)
11

5.1 Power supply using lithium batteries
How to insert the lithium battery
 Remove the screw fitting from the communication unit.
 Slide the cap and pipe casing of the communication unit approx. 50 cm
towards the pressure probe cable.
Communication unit
Infrared interface
Radio antenna
SIM card slot
Communication unit
Pressure probe
desiccant unit
desiccant unit
Pipe casing
Rubber stop
Pressure probe cable
Cap of the
communication unit
Battery compartment
Fig. 2: Setup of the OTT ecoLog 800 (3G)
communication unit.
12

 onnect the lithium battery plug to the socket of the electronic unit, as shown in
figure 3.
 Open the Velcro strip of the battery compartment.
 Insert the lithium battery into the battery compartment (D type lithium battery:
insert the battery into the right-hand side (top) of the battery compartment; the
wiring of the D type lithium battery below the heat-shrinkable tubing must be
located at the side or bottom.)
 Firmly close the Velcro strip around the lithium battery.
 Slide the cap and the pipe casing of the communication unit back up to the
stop. Please note: Do not bend or pinch the battery lead.
 Reinstall the screw fitting to the communication unit.
Battery compartment
Socket
Plug
Electronic unit
Velcro strip
Lithium battery, DD type
Lithium battery, D type
Fig. 3: Inserting the lithium battery.
13

How to replace the lithium battery
 Open the top cap/observation well cover.
 Pull and hold the communication unit approximately 1 m out of the observation
well (a second person would be useful).
 Remove the screw fitting from the communication unit.
 Slide the cap and pipe casing of the communication unit approx. 50 cm
towards the pressure probe cable. (The rubber stop located on the pressure
probe cable (refer to Fig. 2) prevents the pipe casing from falling. Do not move
the rubber stop!)
 Disconnect the lithium battery plug from the socket of the electronic unit, while
pressing the connector latch.
 Open the Velcro strip of the battery compartment.
 Remove the exhausted lithium battery and make sure not to pull the lead!
 Within 10 minutes, connect the lithium battery plug to the socket of the elec-
tronic unit, as shown in figure 3.
 Insert the lithium battery into the battery compartment (D type lithium battery:
insert the battery into the right-hand side (top) of the battery compartment; the
wiring of the D type lithium battery below the heat-shrinkable tubing must be
located at the side or bottom.)
 Firmly close the Velcro strip around the lithium battery.
 Slide the cap and the pipe casing of the communication unit back up to the
stop. Please note: Do not bend or pinch the lithium battery lead.
 Reinstall the screw fitting to the communication unit.
 Slowly and carefully reinsert the communication unit into the observation well.
 Delete the power consumption value (power drawn from battery in ampere
hours) in the "Observer" window of the operating program. For more infor -
mation, please refer to online help in the operating program.
 lose the top cap/observation well cover.
otes
 The OTT ecoLog 800 (3G) stores the measured values in a non-volatile memory.
There is no loss of data when changing batteries.
This also applies to storage without batteries for a long period.
 If replacing the batteries takes longer than approx. 10 minutes the time (and
possibly the date) will have to be re-entered, refer to hapter15, "Setting date
and time". Furthermore, it takes – dependent on how much data is stored – up
to 7minutes until the OTT ecoLog 800 (3G) starts measuring again (during this
time, the OTT ecoLog 800 (3G) re-initializes its database).
 When replacing the batteries, we recommend changing the desiccant capsules
at the same time, refer to hapter 18.2, "Replacing the desiccant capsules".
14

5.2 Power supply using alkaline batteries (OTT ecoLog 800)
otes
 Alkaline batteries can only be used in the OTT ecoLog 800.
They cannot be used in the OTT ecoLog 800 3G!
 At 0 ° , alkaline batteries have approx. 50 % of their original 20 ° capacity
and at –10 ° , they have approx. 35 % due to their design. If temperatures
drop below 0 ° at the measurement station it is recommended that lithium
batteries (OTT lithium batteries D or DD types) be used.
How to insert the alkaline batteries into the battery holder
 Remove the screw fitting from the communication unit.
 Slide the cap and pipe casing of the communication unit approx. 50 cm
towards the pressure probe cable.
 Open the Velcro strip above the battery holder.
 Remove the battery holder from the battery compartment.
 Remove the cap of the battery holder by rotating it counter-clockwise.
 Insert 2 alkaline batteries (LR14 · AM-2 · MN 1400 · ) into the battery holder
as shown in figure 4. Ensure that the polarity is correct!
 Install the cap of the battery holder by rotating it clockwise.
 Insert the battery holder into the battery compartment.
 Firmly close the Velcro strip of the battery holder around the battery holder.
 Slide the cap and the pipe casing of the communication unit back up to the
stop. Please note: Do not bend or pinch the battery holder lead.
 Reinstall the screw fitting to the communication unit.
Battery holder
Battery compartment
Velcro strip
Cap
Alkaline battery
(LR14 · AM-2 · MN 1400 · C)
Plug
Socket
Electronic unit
Battery holder
cable
Fig. 4: Inserting alkaline batteries
into the battery holder.
15

How to replace exhausted alkaline batteries
 Open the top cap/observation well cover.
 Pull and hold the communication unit approximately 1 m out of the observation
well (a second person would be useful).
 Remove the screw fitting from the communication unit.
 Slide the cap and pipe casing of the communication unit approx. 50 cm
towards the pressure probe cable. (The rubber stop located on the pressure
probe cable (refer to Fig. 2) prevents the pipe casing from falling.
Do not move the rubber stop!)
 Open the Velcro strip above the battery holder.
 Remove the battery holder from the battery compartment.
 Remove the cap of the battery holder by rotating it counter-clockwise.
 Remove the exhausted alkaline batteries and make sure not to pull the lead!
 Within 10 minutes, insert 2 alkaline batteries (LR14 · AM-2 · MN 1400 · )
into the battery holder as shown in figure 4 (ensure that the polarity is correct)
an install the cap of the battery holder by rotating it clockwise.
 Insert the battery holder into the battery compartment.
 Firmly close the Velcro strip of the battery holder around the battery holder.
 Slide the cap and the pipe casing of the communication unit back up to the
stop. Please note: Do not bend or pinch the battery holder lead.
 Reinstall the screw fitting to the communication unit.
 Slowly and carefully reinsert the communication unit into the observation well.
 lose the top cap/observation well cover.
If you want to change from the currently used battery holder containing 2 alkaline
batteries (LR14 · AM-2 · MN 1400 · ) to lithium batteries prior to using the unit
follow the steps below:
 Disconnect the battery holder cable from the socket of the electronic unit.
arefully pull the plug straight upwards.
 Open the Velcro strip above the battery holder.
 Remove the battery holder from the battery compartment.
 Insert the lithium battery as described in hapter 5.1.
otes
 The OTT ecoLog 800 (3G) stores the measured values in a non-volatile memory.
There is no loss of data when changing batteries.
This also applies to storage without batteries for a long period.
 If replacing the batteries takes longer than approx. 10 minutes the time (and
possibly the date) will have to be re-entered, refer to hapter15, "Setting date
and time". Furthermore, it takes – dependent on how much data is stored – up
to 7minutes until the OTT ecoLog 800 (3G) starts measuring again (during this
time, the OTT ecoLog 800 (3G) re-initializes its database).
 When replacing the batteries, we recommend changing the desiccant capsules
at the same time, refer to hapter 18.2, "Replacing the desiccant capsules".
16

6 Inserting a SIM card
For communicating over the cellular network, a SIM card is required.
(OTT ecoLog 800: type Mini-SIM card; OTT ecoLog 800 3G: type Micro-SIM card)
How to insert the SIM card:
 Remove the screw fitting from the communication unit.
 Slide the cap and pipe casing of the communication unit approx. 50 cm
towards the pressure probe cable, refer to Fig. 2.
 Temporarily disconnect/remove batteries (refer to Sections 5.1 and 5.2).
 Make sure not to touch the gold-colored contacts of the SIM card!
– OTT ecoLog 800: Insert the SIM card into the SIM card slot as shown in
Fig. 5: press bevelled edge against the latch so that the latch slightly moves to
the left allowing the SIM card to engage.
– OTT ecoLog 800 3G: Insert the SIM card into the silver-coloured SIM card
slot (with the bevelled edge pointing left) until you hear it clicking into place.
Make sure that the SIM card is fully inserted and engaged!
 Reconnect/insert batteries (refer to Sections 5.1 and 5.2).
 Slide the cap and the pipe casing of the communication unit back up to the
stop. Please note: Do not bend or pinch the battery lead.
 Reinstall the screw fitting to the communication unit.
Changing/removing the SIM card
 – OTT ecoLog 800: Slide the latch into the direction indicated by the arrow.
– OTT ecoLog 800 3G: Press the SIM card approx. 1 mm further into the
SIM card slot before letting go.
The SIM card will then be ejected a few millimeters and can easily be pulled out.
SIM card
SIM card slot
Latch
Fig. 5: Inserting the SIM card.
This figure shows, as an example,
a mini-SIM card being inserted into the
OTT ecoLog 800.
17

7 If required: Connecting an external radio antenna
If the local signal strength of the cellular network prevents transmitting from the
closed observation well, an external radio antenna (accessory) is to be connected
to the OTT ecoLog 800 (3G). In this case, only the dedicated external radio
antenna specified by OTT must be used for this particular application (cable
length max. 3 m).
You may fasten the external radio antenna to a suitable location using the shim
and nut supplied (drilling a hole for the thread of the external antenna is required:
Ø approx. 18 mm). For this installation, an individual solution to fasten the exter-
nal antenna must be found depending on the station.
If the observation well is closed by a top cap you need to have a hole in the
observation well so that the antenna cable can be routed to the outside (to prevent
rain water from entering into the observation well, it is recommended to place the
hole on the side). If required seal the cable feedthrough.
How to connect an external radio antenna
Depending on the particular local situation (diameter of the observation well, type
of the top cap, and other mounting characteristics), the external radio antenna
must be connected prior to or during installation. Please note the relevant chapters
8.2 through 8.4.
 arefully unscrew the factory mounted antenna by hand.
 Route the plug of the antenna cable through a hole in the observation well.
 onnect the plug to the antenna socket and hand-tighten the locknut.
 Fasten the external radio antenna to a suitable location outside the observation
well.
otes
 When installing an external radio antenna, the minimum distance to people
and other electrical equipment or antennae must be at least 20 cm.
 Additional accessories for optimizing the radio conditions at the station are
available on request (e.g. plastic top caps, top caps with external or internal
radio antenna).
External radio antenna
Plug of external radio antenna
Antenna socket
Communication
unit
Radio antenna
Fig. 6: onnecting an external
radio antenna.
18

8 Installing the OTT ecoLog 800 (3G) unit
The OTT ecoLog 800 (3G) is installed by hanging it into the observation well.
The necessary accessories and type of installation vary depending on the diameter
of the observation well and the design of the top cap:
 2" observation wells refer to 8.1
OTT top cap with cut-out for adapter plate
 4" or 6" observation wells, refer to 8.2
OTT top cap with cut-out for adapter plate
 Observation wells of 3" in diameter and above, refer to 8.3
Top caps without cut-out for adapter plate
 Special case: observation wells beginning at 3" in diameter refer to 8.4
without top cap, universal installation
4" adapter plate
6" adapter plate
3" adapter plate
1
1
1
22
22
2
2
2
3
3
3
3
2
2
22
Fig. 7: Accessories for installation – Part 1
1 = drilled hole for OTT ecoLog 800 (3G)
2 = cut-out for screws of the top cap
3 = cut-out for contact gauge
Adapter plates for observation wells having
other dimensions are available on request,
refer to the "Order numbers" chapter.
(Each adapter plate consists of two
parts and three bolts. In the figure, the
adapter plates are shown in installed
condition (on delivery, they are not
installed). Furthermore, an O-ring is
supplied with the adapter plates.
19

8.1 Installing the unit into 2" observation wells,
top cap with cut-out
 Required accessories: 2" OTT top cap with cut-out
How to install the OTT ecoLog 800 (3G)
 Preliminary work: If not already done, install batteries and SIM card,
refer to hapter 5.
 Open the top cap.
 Determine the current depth using a contact gauge and note the measured
value.
 Insert the pressure probe into the observation well.
 Slowly and carefully lower the pressure probe by means of the pressure
probe cable!
 Insert the communication unit into the observation well until the upper part of
the communication unit is fully seated on the top cap, refer to Fig. 9.
 Set the operating parameters, refer to hapter 9.
 lose the top cap.
Universal suspension bracket
1
Fig. 8: Accessories for installation – Part 2
1 = drilled hole for OTT ecoLog 800 (3G)
Communication unit
OTT top cap
Infrared interface
2" observation well
Fig. 9: Installing the OTT ecoLog 800 (3G)
into a 2" observation well.
20