HWM LoLog 450 Manual

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User Guide: LoLog 450, 500, Vista
- Installation and Setup
(using the IDT app)
Warning: This manual contains important safety and operating information.
Please read, understand, and follow the instructions in the manual
and also any safety / approvals documents shipped with the device.
MAN-110-0009-A January 2023.

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TABLE OF CONTENTS
1Introduction .......................................................................................................................4
1.1 Documentation and Support of Product .................................................................4
1.2 Operating Temperature ............................................................................................4
2Overview and preparation for use...................................................................................5
2.1 Physical Features & Interface Identification ............................................................5
2.1.1 LoLog450 .............................................................................................................5
2.1.2 LoLog 500 and LoLog Vista ................................................................................6
2.2 Communications Links (for programming and data download)............................7
2.2.1 IDT - used with a Tablet device (via USB)..........................................................8
2.3 Preparing a Tablet for use.........................................................................................8
2.4 Logger operation .......................................................................................................8
2.5 Logger activation process (for First-time use) .........................................................9
3Interfaces and sensors....................................................................................................10
3.1 Logger interfaces and sensors................................................................................10
3.2 Pressure Sensor Inputs ...........................................................................................10
3.2.1 Internal Pressure Sensor .................................................................................10
3.2.2 External Pressure Sensor.................................................................................10
3.2.3 Available pressure ranges................................................................................11
3.2.4 Calibration.........................................................................................................11
3.2.5 Re-zero facility (for pressure relative to local atmosphere)..........................11
3.3 Flow Sensor Input (meter pulse collection) ...........................................................12
3.3.1 Via a 4-pin connector........................................................................................12
3.3.2 Via a glanded cable with 4-pin connector.......................................................13
3.3.3 Via a built-in pulse-head / Reed switch...........................................................13
3.4 4-20mA Sensor Input...............................................................................................13
3.5 Pinout / Installation cables......................................................................................14
3.5.1 Flow input..........................................................................................................14
3.5.2 Milliamp Input (4-20mA) ..................................................................................15
4Installation Steps.............................................................................................................16
5Using the IDT app............................................................................................................17
5.1 Setup of LoLog Vista display / Understanding the LCD display ...........................17
5.2 Memory Management.............................................................................................19
5.3 Telephone number / SMS number: IDT app generates........................................19
5.4 Check of Status before leaving site. .......................................................................20

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6Retrieving, storing, and viewing data.............................................................................20
6.1 Viewing your data on the server.............................................................................20
6.1.1 Identifying your logger’s data (using site or SMS number) ...........................21
7Troubleshooting ..............................................................................................................21
8Maintenance, Service and Repair...................................................................................22
8.1 Cleaning ....................................................................................................................22
8.2 Replaceable parts ....................................................................................................22
8.3 Return of product for Service or Repair.................................................................22

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1INTRODUCTION
Thank you for choosing a HWM device. We trust it will provide you with many years of
service.
The “LoLog” family consists of LoLog 450, LoLog 500 and LoLog Vista devices. Each
logger can be built and configured to suit specific applications; several models of each
type are available. Please contact your sales representative for help with selection of an
appropriate model for your application.
1.1 DOCUMENTATION AND SUPPORT OF PRODUCT
This user-guide covers the following model families:
Model Number(s) Description
RDL451LF/??*, RDL452LF/??* LoLog 450 models
RDL511LF/??*, RDL512LF/??* LoLog 500 models
RDL511LF/??V*, RDL512LF/??V* LoLog Vista models
The user-guide should be read in conjunction with:
MAN-110-0002 Safety Warnings and Approvals Information.
MAN-2000-0001 User Guide - IDT (mobile) app.
This user-guide provides details of the available logger interfaces, its operation and how
to install the product. It includes some information about use of the IDT app, which is a
software tool (from HWM) that allows users to check or modify logger settings and to
test that the logger is working correctly. It is also used later to retrieve the data from the
logger.
To view your data a viewing tool is required; refer to any user-guide or training
materials relevant to the tool you will be using (see also section 6).
Note: Periodically new features and changes are released, thus you may observe slight
changes from the diagrams and features shown in this manual. The available
features can vary depending on which LoLog model is in use.
Refer to IDT app screens and setting options to determine which features are
available on your logger.
In the event of any issue, please refer to the Troubleshooting section of this document
(see section 7). HWM also provides support of the logger devices by means of our
customer support webpages: https://www.hwmglobal.com/help-and-downloads/
Should you have any questions that are not covered by this manual or the online help,
please contact the HWM Technical Support team on [phone],
or email: [e-mail]
1.2 OPERATING TEMPERATURE
Refer to the logger Datasheet or your sales representative for guidance on the storage
and operating temperature range of the device. Ensure the unit is within the operating
temperature range prior to installation.

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2OVERVIEW AND PREPARATION FOR USE
2.1 PHYSICAL FEATURES &INTERFACE IDENTIFICATION
The LoLog series loggers have a front face (which includes
the infrared communications window) and a rear face.
Labels (including the nameplate label) are present on the
loggers. On the LoLog 500 and LoLog Vista models, they are
positioned on the rear and side faces of the unit. On the
LoLog 450 they are positioned on the rear face.
The label (see Figure 1) will indicate the LoLog model name
(e.g., LoLog 500) and the part-number of the unit, the latter
being specific to the logger construction. The label also
includes a unique serial number for the LoLog unit.
2.1.1 LoLog450
The LoLog 450 (see Figure 2) is the smallest
device in the LoLog family of loggers.
The logger has a plastic enclosure and is
constructed to be resist the ingress of dust
and water to IP68 standard.
Refer to the model datasheet for additional
information and feature summary.
In the centre of the logger there is a window
(surrounded by a magnetic ring) which is used for
infrared communications.
A cable with an infrared interface (refer to section
2.2), available from HWM, is required for
communications with the logger. The magnetic
ring holds the communications interface in
position during use.
The logger will have either one or two
measurement interfaces fitted. These will pass
through the enclosure at either the top or bottom
of the logger, depending on the model supplied.
Some interfaces may be presented as a waterproof bulkhead connector. Some
interfaces may exit the enclosure by means of a glanded cable.
A pressure interface may also employ a built-in pressure transducer with a quick-
release connector. This is for direct connection to a pipe (or hose).
The interfaces fitted are also shown on labels, but sometimes in a
shortened format. E.g., the position of an Internal Pressure
transducer (built-into the unit) is shown as “INT. PRESS (20BAR)” in
the label shown in Figure 3.
Figure 2. LoLog450
Figure 1. Example LoLog nameplate label
Figure 3. Example measurement
interface label

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2.1.2 LoLog 500 and LoLog Vista
The LoLog 500 and LoLog Vista (see Figure 4) are the
largest devices in the LoLog family of loggers.
The loggers have a metal enclosure and are
constructed to be watertight.
The LoLog Vista has a built in LCD display.
(Refer to section 5.1).
The LoLog 500 is similar in construction but does
not have any LCD display.
Refer to the model datasheets for additional
information and feature summary.
In the centre of the logger there is a window
(surrounded by a magnetic ring) which is used for
Infrared communications.
An infrared communications cable (refer to
section2.2), available from HWM, is required for
communications with the logger. The magnetic ring
holds the communications interface
in position during use.
The logger will have either one or two interfaces
fitted depending on the model supplied. These will
pass through the logger enclosure at the bottom of the logger.
Some interfaces may be presented as a MIL-SPEC bulkhead connector.
A pressure interface may also employ a built-in pressure transducer with a quick-
release connector. This is for direct connection to a pipe (or hose).
The interfaces fitted to the logger are shown
on labels, but sometimes in a shortened
format. (E.g., the position of an interface for
external (wired) pressure transducer is
labelled as “EXT. PRESS” in Figure 5).
Mounting
holes
Handle
(for carrying
or hanging)
Figure 4. LoLog Vista
Figure 5. Typical interface (channel) identification

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2.2 COMMUNICATIONS LINKS (FOR PROGRAMMING AND DATA DOWNLOAD)
To communicate with the logger, an
infrared communications interface is
required. E.g.,HWM part-number
“RAG R10USB”.
The interface is known as the “USB IR
Reader” (See Figure 6 and Figure 7).
For reliable communication, ensure the infrared windows of both the LoLog and the
USB IR Reader are clean prior to use.
The IR Reader is positioned over
the magnetic ring / infrared
window of the logger during use;
it is held in place by the magnetic
force. (See Figure 8).
The other end of the interface is
a standard USB-A connector.
A software tool, known as the “IDT app”, is available for programming the LoLog series
loggers. The app should be installed on a tablet, or similar device. However, additional
items may be needed to complete the connection path and allow use of the
programming tool.
Figure 6. USB IR Reader
Figure 7.
IR Reader communications window
Figure 8. IR Reader coupled to a LoLog Logger for communications

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2.2.1 IDT - used with a Tablet device (via USB).
The IDT app requires the IR Reader to be plugged into an available USB port of the
tablet device hosting the programming tool. This can be directly to a USB-A port, or via a
suitable adaptor (if required).
The tablet device provides power to the IR Reader.
Prior to use, the tablet should have the IDT app software installed.
When using this connection method, be sure to select the
IR Reader listed in USB connections within the IDT App.
2.3 PREPARING A TABLET FOR USE
The LoLog devices require a user-interface in order to setup and test the unit. This is
provided by a HWM software tool / app called “IDT” (“Installation and Diagnostic Tool”).
This must be installed on a tablet or mobile phone device. Refer to the IDT app user-
guide for further information and installation instructions.
2.4 LOGGER OPERATION
The LoLog logger is powered by a non-rechargeable Lithium battery. The software is
designed to minimise battery use and thereby prolong the expected battery life.
However, battery life is also affected by user-programable settings. The user is advised
to set the logger to keep the frequency of logged measurements to the minimum
needed in order to manage battery power effectively.
Before the logger can be used, it must first be activated (see section 2.5).
The LoLog series loggers have a capacity of producing up to 2 channels of data,
containing a series of data-points (values). The data-points are separated in time by a
time interval, known as the “log period”; this can be modified using IDT. However, the
logger sometimes takes additional measurements in the background, which can then be
IR Reader
Tablet device
(Comms
& power
via USB)
Figure 9. Communications path when using IR Reader directly
Figure 10. IDT app control offered to select
IR Reader as a connection method

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used to produce “average” values. Where a logger has an unused interface, the related
channel can be disabled to reduce battery power consumption and the saving of
zero/null or erroneous data.
The LoLog series loggers have the options of analogue inputs or digital inputs (usually
used for meter pulse detection), or one of each. The inputs are monitored during logger
operation and are arranged as input channels. The ‘output channel’ is the measurement
data, consisting of a series of numeric ‘datapoints’.
For analogue channels, the LoLog logger will produce a datapoint which represents an
average value for the measurement over the preceding log interval.
For digital (pulse input) channels, the signal transitions (typically meter pulses from a
water meter, representing water consumption) require calculations of a different type
to be made to produce the datapoints. The logger again produces an average value as a
datapoint for each preceding log interval. However, to produce this figure the logger
either counts pulses or it can measure the time interval between pulses arriving.
The logger has a large but finite memory size (up to 64000 readings as standard, but
models with additional memory are available). The user can set the logger to either stop
logging when the memory is full of data, or to continue to record (by over-writing the
oldest data, which then becomes lost).
2.5 LOGGER ACTIVATION PROCESS (FOR FIRST-TIME USE)
The logger is normally shipped from the factory in an inactive state (referred to as
“stopped”by the IDT app, for these models) to preserve the life of the battery. Whilst in
this state, the logger still monitors the infrared communications window for any activity
in case someone is trying to communicate with it; it is mainly measuring and logging
functions that are suspended.
To use the logger, it must first be activated, by using the IDT app, as follows:
Check the recording status of the logger.
If it is in a “stopped” mode, the logger is inactive.
Tap on the Status line.
IDT will write the program settings back to the logger and
then cause the logger to re-start.
The logger will proceed through the states of “waiting”
and then “recording”, as described in the IDT user guide
(‘Logger recording status" section). Once in the state of
“recording” the logger has completed activation.
It then starts repetitively measuring from sensors and
recording data.
The logger may also be activated by modifying any existing program settings. Each time
the program is modified, the IDT app will save the settings to the logger and cause it to
re-start.
Figure 11. IDT indicating logger state of 'stopped'
Figure 12. IDT during data transfer to logger.

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3INTERFACES AND SENSORS
3.1 LOGGER INTERFACES AND SENSORS
Sensors provide information for various physical parameters, and this information is
transferred to the logger via an appropriate interface.
LoLog can support the following interface types:
•Flow (consumption) - This is a digital interface, sensing an open / closed
contact, for detecting meter pulses.
•Pressure - This is an analogue interface for pressure sensors.
•(Other, 4-20mA input) - The logger may include an input for use with analogue
sensors that have a 4-20mA output signal.
(The parameter being measured will depend on the
sensor used).
Note: The fitted interfaces are dependent upon the model supplied.
Analogue interfaces require calibration to match the sensor type prior to use.
Calibration is done prior to shipment from the factory.
Some loggers have a connector for attaching or removing a sensor, whilst others may
include the sensor permanently attached (e.g., a pulse detection head).
Sensors provided by HWM will include a cable with a suitable connector for the logger.
3.2 PRESSURE SENSOR INPUTS
Depending on the model supplied, the logger may have up to two pressure inputs.
3.2.1 Internal Pressure Sensor
A pressure input may be presented as a built-in transducer
(as shown in Figure 13), which connects directly to the fluid
via a hose using a quick-release connector.
When connecting a hose to the logger using a quick-fit connector, give
consideration to the possibility of adverse weather conditions and if
required, insulate the hose (and logger) to prevent damage due to
water freezing.
3.2.2 External Pressure Sensor
A pressure input may be presented as an electrical interface, using
a 4-pin MIL-Spec connector (as shown in Figure 14).
This allows a cabled pressure transducer (sensor) to be
plugged into the logger. HWM can provide a variety of
pressure sensors with the appropriate connector for the logger.
Figure 13. Quick Release
connector for a built-in
pressure transducer
Figure 14. Pressure interface
with a 4-pin MIL-spec connector

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Note: A typical pressure transducer is shown in Figure 15. It has a threaded end for
connection to the pressure measurement point (directly, or via the use of
adaptors).
When connecting the pressure sensor to the logger, ensure that the connector is dry,
correctly aligned, fully pushed home, and fastened so that it is secure and watertight.
This will prevent corrosion to the contacts and help the logger to continue to operate
reliably.
3.2.3 Available pressure ranges
A LoLog supplied with an internal pressure sensor has a standard range of 0-10bar
(Since 1 bar = 10.2 meters head of water, this corresponds to a range of 102.0 meters).
This sensor produces a numeric range of 0 to 1020. (With this numeric range, a
multiplier of 0.1 can be used to convert to meters of water head pressure).
Model numbers fitted with a 10-bar transducer are standard format. (E.g., RDL451LF/60)
Certain LoLog models may include an internal pressure sensor of 0-20bar or 0-30bar
range. These sensors produce a numeric range of 0 to 2040 and 0 to 3060 respectively.
3.2.4 Calibration
LoLog loggers are supplied factory-calibrated for use with the supplied pressure
trandsucer. It is not possible for the user to re-calibrate the unit. If re-calibration is
required, discuss the avaibility of the service with your HWM representative.
3.2.5 Re-zero facility (for pressure relative to local atmosphere)
The sensors normally measure pressure relative to atmospheric pressure. Prior to
connecting the transducer to the actual measuring point, leave it exposed to the local
atmosheric pressure. Then “re-zero” the sensor using the IDT app.
Figure 15. Illustration of a typical pressure transducer

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3.3 FLOW SENSOR INPUT (METER PULSE COLLECTION)
Depending on the model supplied, the logger may have 0, 1 or 2 Flow inputs.
These are digital inputs, designed to sense the open or closed condition of a switch
(activated by the installed meter). To use the flow channel(s) the logger must be set up
(using IDT) to know what each meter pulse represents.
3.3.1 Via a 4-pin connector
A Flow input may be presented as an electrical interface,
using a single 4-pin MIL-Spec connector (shown in Figure 16).
The connector pinout has 2 inputs and can support up to
2 channels. However, the quantity available for use will depend on
the factory settings for the logger.
•input 1 is between pins B and C.
•Input 2 is between pins D and C.
Where the logger is pre-configured by the factory to produce only 1 Flow channel
(datapoint stream), the pins within the single electrical connector can be used in one of
two different ways:
1. Input 1 can be used with a Uni-directional meter (one which only measures
forward flow / consumption).
For use in this configuration:
•Input 1 acts to collect meter pulses, and
•input 2 must be left disconnected.
2. Inputs 1 and 2 can be used as a pair with a Bi-directional meter (one which can
measure both forward and also reverse flow).
For use in this configuration:
•Input 1 acts to collect meter pulses, and
•input 2 is used for the flow direction indication from the meter
(open = forward flow, closed = reverse flow).
Where the logger is pre-configured by the factory to produce 2 Flow channels
(datapoint streams), the pins within the single electrical connector are used as 2
independent input channels (channels 1 and 2).
Each input can be used with a Uni-directional meter (one which only measures forward
flow / consumption).
•Channel 1 input is between pins B and C.
•Channel 2 input is between pins D and C.
Note: Certain logger models can alternatively be fitted with 2 x 4-pin connectors.
For these, both inputs are between pins B and C.
Figure 16. Flow sensor interface
with a 4-pin MIL-spec connector

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3.3.2 Via a glanded cable with 4-pin connector
Some logger models have a Flow sensor input consisting of a glanded-in cable which
ends with a 4-pin connector. This 4-pin connector has the same pinout and operation as
the bulkhead version described in section 3.3.1.
3.3.3 Via a built-in pulse-head / Reed switch
Certain models within the LoLog series
are supplied with a Pulse-head or Reed
switch pre-fitted to the logger.
(One example of a pulse head is shown
in Figure 17).
Take care to understand if the pulse
head affects the meter pulse rate to the
logger in any way when installing.
Various types of pulse-head are available. When ordering the logger, ensure the pulse-
head fitted is the one you require, (i.e., that it will be suitable for use with the meter).
(Discuss with your HWM representative prior to ordering).
3.4 4-20MASENSOR INPUT
The LoLog can be fitted with up to one input for connection of a sensor which uses
a 4-20mA current as its signal output.
The 4-20mA input is presented as an electrical interface,
using a single 4-pin MIL-Spec connector (shown in Figure 18).
The connector provides one channel.
The input is passive (i.e., the logger provides a current path for
sensor equipment that has its own power source).
The inputs are as follows:
•Sensor ‘ + ’ is on pin B.
•Sensor ‘ –‘ is on pin D.
Although intended for use with 4-20mA sensors, the sensor is factory calibrated to
cover the range of 0-20mA. The logger indicates the measured current with a numeric
range of 0 to 2000.
The channel can be set up using IDT. This type of input will appear in IDT as a ‘4-20mA’
channel.
Figure 17. Example of LoLog with a captive pulse-head
Figure 18. 4-20mA sensor interface
with a 4-pin MIL-spec connector

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3.5 PINOUT /INSTALLATION CABLES
Simplified examples of input circuits are illustrated below.
3.5.1 Flow input
LoLog 4 Pin MIL-spec Connector (Flow)
Pin
No.
Title
Description
Typical HWM cable
colours (for Flow)
A
Not connected
Red
B
Flow
Flow input signal (pulses)
Blue
C
GND (0V)
Ground (0 volts)
Green
D
Direction
Pulse Direction input signal
0V = -VE direction
Yellow
1
2
3
.
.
VSS
VDD
Maximum frequency 64Hz
Minimum pulse width 8mS
Logger
input
ciruit
FLOW / DIRECTION
Open
collector
.
2
1
.
Contact
closure
.
B or D
.
.V+
C
A
Figure 19. Schematic (typical digital flow input circuit)

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3.5.2 Milliamp Input (4-20mA)
LoLog 4 Pin MIL-spec Connector (milliamp)
Pin
No.
Title
Description
Typical HWM cable
colours (for milliamp)
A
B
+VE signal
Positive mA input signal
Blue
C
D
-VE signal
Negative mA input signal
Yellow
.
Logger
mA
input
ciruit
.
+
-
GND
.
.
B
VDD
D
4-20mA
transmitter
Figure 20. Schematic (typical milliamp input circuit)
(+)
(-)

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4INSTALLATION STEPS
•Consider where the equipment is going to be located.
•Check that an assessment of the work has been done and that any safety measures
are in place. (E.g., Safety precautions, protective clothing and/or equipment is used).
•Check any meter to which the logger is required to be connected is suitable for use
with your logger; check the meter pulse signals are available, and if the meter is
uni-directional or bi-directional. Check if the meter requires a pulse-head for making
meter pulses available.
•Check fittings are available to connect to any pressure measurement point.
•Check all cables and hoses are of a suitable length.
•The logger must be mounted in a suitable location where the sensors to be attached
can reach their intended installation points.
Place the logger into position and ensure it is securely fixed. Consider access
requirements for connection of the infrared reader.
•The logger, cables, and sensors should be kept away from sources of electrical
interference such as motors or pumps.
•Cables and hoses should be routed and secured so as to not cause any hazards. Do
not allow any equipment to rest on cables, connectors, or hoses as crush damage
can result.
•Connect to the logger (see section 2.2) and launch the IDT app.
•Use IDT to check or modify existing logger settings.
•For pressure sensors, electrically attach them but expose the sensor to the local
atmospheric pressure and re-zero them before commencing making a connection to
the measurement point.
•Install (position and connect) the sensors at their measurement point.
Bleed any connections to water.
Where required, insulate any water-filled tubing connected to pressure transducers
to protect them from frost. Insulating pipe covers can be supplied upon request at
additional cost or sourced locally from a hardware store.
•Test the logger and sensors are functioning correctly.
•Ensure any electrical connections made on site are durable and water-tight.
•(Vista only). Select the information to be output on the LCD Panel using IDT.
•Verify any changes to settings have been saved prior to leaving site.
Check that the logger is in a “recording” state.
•For use of the logger with the DataGate system, ensure details of the site of logger
deployment are recorded.
(Use of the HWM Deployment app is recommended to reduce the server
administration required by office staff).

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5USING THE IDT APP
Refer to the IDT app user-guide for guidance regarding use of IDT. The IDT guide covers
several logger models, including setup of most of the functionality for the LoLog series.
It can also be used to test sensor are operating correctly.
The IDT app must have a communications path to the logger; Refer to section 2.2. Then
start communications by reading the current program settings into IDT.
This user-guide will describe a limited set of features that are unique to LoLog loggers
or are of particular importance.
5.1 SETUP OF LOLOG VISTA DISPLAY /UNDERSTANDING THE LCD DISPLAY
The LoLog Vista has an LCD display panel. This can be used to display various
measurement values. The display continuously cycles through:
Time →Ch1 →(Ch1 selected values) →Ch2 →(Ch2 selected values).
To select the display content for the LoLog Vista, take the following steps:
Within the “Configure Device” page, select the
“Display Options”line.
The Display Options page will be
shown. This page has two sets of
identical controls, one for Channel 1
and one for Channel 2.
There is a “Mode” selection line, which
is the main selector of how many
measurements are being displayed.
Where Minimum or Maximum values
are included in the selection, additional
information is required. (These are
entered on the lines that are shown
opposite but are currently ‘greyed out’).
The Minimum and Maximum values
require a time-window from which the
minimum and maximum values are to
be selected. This can either be the last
24-hours, or from specified start and
end times.
The display for a specific channel can
also be disabled by selecting “Off”.
Figure 22. 'Display options' page, with a group of controls for each
available channel
Figure 21.Selector to access the Display Options page.

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Note: The LoLog 450 and LoLog 500 also have this option within IDT. These can be set
to “off” since no display exists on these models. Any other setting is irrelevant.
To setup the display of a specific channel, tap on the “Mode” line of that
channel. Several options will be listed.
•Off:
Deactivates the channel from showing on the LCD display.
•Value:
Shows the current value (last datapoint produced) in the display
sequence.
•Total:
Shows the value of the total flow since the logger was last restarted.
(If set for an analogue channel, Pressure or 4-20ma, the setting will be
ignored as it has no meaning; the LCD shall not display any value).
•Value and Total:
Displays the current value, then the total value
•Min / Max:
Displays either the minimum value or the maximum value from the
datapoints within a timed window.
•(The remaining settings show various selections, as explained above,
which will be displayed in the sequence selected).
When selecting the LCD to include the display of a minimum or maximum value, tap on
the “Min/Max Mode” line.
Then select the required value and either a ‘last 24 hours’ or a ‘time-window’ option.
If a ‘time window’ option was selected, adjust the window start and end times.
Each time the LoLog displays a value, it precedes it with a ‘code’ on the LCD which gives
information about the digits that follow:
Results for an analogue channel (such as Pressure or 4-20mA input)
are preceded by a code of 3 digits, then ‘P’.
Figure 23. Display mode
selection
Figure 24. Min/Max selections and setup of the time window

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Results for a digital channel (such as meter pulses indicating Flow)
are preceded by a code of 3 digits, then ‘F’.
When displaying a total (e.g., for a flow channel), the number is 12 digits in length, and
thus is too big to display within the 4 LCD digits. The value is therefore displayed by
spreading it over 3 sets of 4-digits. Each partial value is again prefixed by a code,
‘000’ (and then a horizontal ‘position’ bar):
The most significant 4 digits is preceded by code, ‘000’ (and then a high bar).
The middle 4 digits is preceded by code, ‘000’ (and then a middle bar).
The least significant 4 digits is preceded, by code ‘000’ (and then a low bar).
When displaying a minimum value, the value is preceded by a code,
the last digit being a ‘lower n’.
When displaying a maximum value, the value is preceded by a code,
the last digit being an ‘upper n’.
5.2 MEMORY MANAGEMENT
The Global settings page has an additional control for LoLog memory management.
This is normally set as disabled, as shown.
In this condition the logger will over-write the
oldest data with new data.
If the control is set as enabled, the logging will
simply stop when the memory is full.
5.3 TELEPHONE NUMBER /SMS NUMBER:IDT APP GENERATES.
The ‘Device Information’ screen contains a field showing the ‘SMS / Telephone number’
of the logger. This cannot be edited by using the app; it can be disregarded. Instead, the
app generates an SMS number on behalf of the logger to identify it when sending data
to the server. (Refer to section 6.1.1 for details).
Figure 25. Memory management control in 'Global
settings' page

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5.4 CHECK OF STATUS BEFORE LEAVING SITE.
Prior to leaving site, it is important to check that the
logger is not in a ‘stopped’ state but is indicating that
it is ‘recording’. Follow the guidance regarding ‘Logger
recording status’ in the IDT user-guide to confirm.
6RETRIEVING,STORING,AND VIEWING DATA
Measurement data is initially stored within the logger. To access the data, return to the
logger after some time and re-connect to it using the IDT app. The data can be
temporarily downloaded into IDT and viewed graphically. For data retrieval with
permanent storage, IDT is required to be used in conjunction with the DataGate server.
Refer to the IDT app user-guide for how to undertake this task and also the latest
information on IDT capabilities and features.
6.1 VIEWING YOUR DATA ON THE SERVER
When logged into the IDT app, logger data can be transferred to the server for storage.
The data is then best viewed with the viewing portal (website) recommended by your
HWM representative (e.g., DataView, shown below).
DataGate can also (by arrangement with your sales representative) be used to export
logger data to other servers.
Figure 27. Example of data seen using an on-line data viewing tool
Figure 26. Check logger status is 'recording'
before leaving site