Comet U0141TM User manual

www.cometsystem.com
User‘s Guide
U0110M
U0121M
U0141M
U0141TM
U0843M
U3120M
U3121M
U3631M
U4440M
U5841M
U6841M
U7844M
U8410M
GSM modem dataloggers

2IE-LGR-UxxxxM-22
© Copyright: COMET SYSTEM, s.r.o.
This User’s Guide may not be copied, and its contents may not be changed
in any way without explicit consent of COMET SYSTEM, s.r.o..
All rights reserved.
The COMET SYSTEM, s.r.o. company is continuously developing
and improving its product. COMET SYSTEM, s.r.o. reserves the rightto carry
out technical changes in equipment or product without any previous notice.
Contact address of this device’s producer:
COMET SYSTEM, s.r.o.
Bezrucova 2901
756 61 Roznov pod Radhostem
Czech Republic
www.cometsystem.com

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List of contents
INTRODUCTION........................................................................................4
DATALOGGER UXXXXM...........................................................................5
SAFETY MEASURES AND UNAUTHORIZED MANIPULATIONS .............6
GUIDE TO INSTALLATION AND USAGE OF THE DEVICE......................7
Inserting the SIM card into the device...........................................7
Installing the datalogger, placing the probes.................................8
Device set-up..............................................................................10
Running the device.....................................................................10
Device disposal procedure..........................................................11
OPERATING THE DATALOGGER FROM THE KEYPAD........................12
Displaying the device data..........................................................12
Menu Options .............................................................................16
MODELS PRODUCED.............................................................................17
COMET VISION PROGRAM....................................................................27
SETTING UP THE DEVICE......................................................................28
How to set up the device by means of a program........................28
The device setup from a program (Configuration).......................28
APPLICATION NOTES.............................................................................38
RECOMMENDATIONS FOR OPERATION AND MAINTENANCE...........41
TECHNICAL PARAMETERS....................................................................44
Power supply..............................................................................44
USB communication interface.....................................................45
Measuring, data storage and real time circuitry...........................45
Radio section..............................................................................46
Parameters of datalogger inputs.................................................47
Operating and storage conditions ...............................................58
Mechanical properties.................................................................58
Declaration of conformity ............................................................59
Dimensions.................................................................................60
ANNEXES................................................................................................64
Annex 1: Selected error messages of the device .......................64
Annex 2: Connection of the Pt1000/E series probe connector ...65
Annex 3: Accuracy of the dew-point temperature measurement 66
Annex 4: Connecting the wires to the terminals .........................66
Annex 5: Calculated channels....................................................67
Annex 6: SMS message format..................................................68
Annex 7: Firmware updates.......................................................71
Annex 8: Typical tolerance of the % RH measurement ...............72

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Introduction
This datalogger is designed for autonomous measurements and recording
of physical and electrical data, with the data recording interval from 1 s to 24 h.
The inputs and ranges of quantities to be measured are determined
by the model type the user has bought. The user cannot modify them.
This portable device can be mounted in a fixed-position. To set up datalogger,
a PC with a USB interface is needed.
This device allows:
- to measure and process input data coming from internal or external sensors,
binary inputs, counters or current inputs.
- to detect and log minimum and maximum values (existing since their last
manual resetting) of each quantity,
- to display the measured values on an LCD display. Some features can be
controlled by two push buttons situated next to the display (device switching
off and on, deactivation of alarm signalling, Min/Max value resetting),
- to store an autonomous chronological record of measured values in internal
non-volatile memory. The values to be collected can be measured at the instant
of recording or as average or min/max values detected during the recording
interval. Recording can be performed continuously or at the alarm time only.
The recording mode can be also set optionally as non-cyclic to stop at the
memory filling up, or as cyclic. In this mode the originally recorded values will
be overwritten by fresh ones after the memory unit getting filled up.
- to set up two alarm signalling limits for each quantity to be measured. The alarm
signalling can be realised visually, optionally by a symbol appearing on the
display or by a short blink of an LED, or acoustically. In addition, all UxxxxM
series dataloggers contain a GSM modem enabling to send alarm SMS
messages to up to four selected receivers and can send values over a GPRS
data connection using JSON messages when changing the alarm status.
- to send data to the COMET Cloud storage system
- to send, at a configurable interval, informative SMS messages containing
device identification, currently measured values and alarm states to up to four
selected receivers. These messages may be of two kinds: user readable
(suitable to be displayed on a mobile phone), or machine readable (suitable
for automated data processing in a database or a cloud).
- In configurable interval to send measured values over a GPRS data
connection using JSON messages
- to be supplied in autonomous manner from an internal Li-ion rechargeable
battery. This can be charged by a common USB charger. An internal GSM
modem is connected to the supply unit only when a sending request has been
sent out, otherwise it is switched off to save energy.
- to communicate with a computer by means of a USB interface (all device
settings, recorded data downloading, and online monitoring).
To communicate, the datalogger utilises the HID USB standard, which does
not require additional controllers to be built into the PC.

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Datalogger UxxxxM
(U0141M model)

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Safety measures and unauthorized manipulations
Read the following safety directions carefully before putting the device into operation.
Follow these instructions when using the device!
•Legislative conditions. This datalogger contains a radio transmitter working in GSM frequency
bands and using power values that are shown in its “Technical parameters”. These bands
and power values are used in the countries of the European Union. Before the first setting
the device in operation make sure that you are allowed to operate the device if you reside
in a locality outside the EU.
•Electromagnetic interference. Do not use the device in an area where the usage of mobile
phones is limited, e. g. near sensitive medical apparatus, on board a plane or in localities where
explosive materials are used.
•Operating and storage conditions. Observe the recommended operating and storage
condition as quoted in the “Technical parameters”. This datalogger makes use of an internal Li-
ion rechargeable battery. Pay attention to the device is not exposed to temperatures higher than
60 °C. Do not expose the device to direct radiation of heat sources and sun.
•Fire and explosion hazard. It is not allowed to use this datalogger within hazardous areas,
especially those endangered by a potential explosion of combustible gases, vapours or dust.
•Device cover. Do not operate the datalogger without the cover. After inserting the SIM card
check the integrity of the sealing. Screw the device together by using the original screws.
Proceed always exactly according to instructions that are given later in this User’s guide.
•Aggressive surroundings. Do not expose this device to any kind of aggressive surroundings,
to chemicals or mechanical shocks. Use soft tissue for cleaning. Do not apply solvents or similar
aggressive agents.
•Battery damage. Should the battery casing get damaged or should the whole device get
destroyed, carry it outside thefire, hightemperature or water affected area to a safe fire-protected
place. Protect yourself and the environment against escaping gases and against being soiled
with the battery electrolyte.
•Failures and servicing. Do not try to repair the device yourself. Any repairs including battery
exchange may be carried out by suitably instructed service personnel only. If the device shows
signs of unusual behaviour, screw off the rear cover to disconnect the battery connector. Avoid
the removed battery contacting any metallic parts. Contact the distributor you have bought the
device from.
•Battery charging. Use the charger that has been recommended to charge the rechargeable
battery. During the charging procedure the device must be located in an indoor room with a
relative humidity (RH) up to 85 %. The charging will proceed at an indoor temperature ranging
between 0°C and +40°C.
•Protection against water and dust. The device will be protected against water and dust only
when all connectors are duly tightened, and the USB connector is provided with a closing cap.
The input connectors that are not used have also to be provided with closing caps.
•Serviceability. This device makes use of the wireless communication and the GSM network.
For this reason, the connection (SMS, GPRS, etc.) cannot be guaranteed always and under any
circumstances. Do not rely merely on wireless equipment if crucial communications must be
realized (rescue systems, safety systems). Bear in mind that redundancy is indispensable
for systems featuring high functional reliability. See e.g. IEC 61508 for more information.
•Recommended accessories. Use only accessories that are recommended by the producer.

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Guide to installation and usage of the device
Inserting the SIM card into the device
•Prepare suitable SIM card - depending on the intended use, prepare
a SIM card for the 2G network that will meet the expected amount of sent
SMS messages and transmitted data. The transmitted data can be sent
through GPRS data connection. Approximate data consumption is 1.5kB
for each sent data message when sending via HTTP (if you use HTTPS,
it increases to 8.5kB per message).
•Use the micro SIM card and insert it into the device. If you have a nano
SIM card, you must purchase a micro SIM adapter. If the SIM card
is protected by PIN code, make a note it, and later insert this code into
the device configuration.Select such a tariff thatmeets your requirements
concerning the quantity and safety of the message delivery. For some
tariffs the message delivery may be stopped when a certain number
of messages or amount of transferred data is exceeded or when a given
time period has elapsed.
•If you use the optional IoT SIM card accessory (order code LP105), you
get the option of a mobile connection to send data to the COMET Cloud.
With this card it is possible to transfer 500 MB of data, ie. the endurance
of this SIM card is approximately 5 years at a 10-minute sending interval
(possibly 2.5 years at a 5-minute sending interval). Attention, this IoT SIM
card does not support sending of SMS messages!
•Make sure the device is turned off or turn it off.
•Screw off the rear cover of the device –caution, the device is constantly
supplied from the internal battery. Proceed with care. Prevent external
conductive parts from contacting electronics components when
manipulating the device without the back cover installed.
•Insert the card into the SIM card holder

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•Removing the card from the SIM card holder
•Screw up the rear cover of the device
- at first check the seal in the nut
for integrity, then screw down the lid
with the aid of four self-cutting screws.
ATTENTION –tighten screws gradually
and with feeling!
GSM module status (blue LED
indication)
LED state Module Function .
Off The module is not running
64ms On / 800ms Off The module is not synchronized with network
64ms On / 2000ms Off The module is synchronized with network
64ms On / 600ms Off The GPRS data transmission after dialling
the PPP connection
Installing the datalogger, placing the probes
•Choose a suitable location for installing the device - bear in mind that
the environmental conditions should be concordant with the Operating
conditions. Do not situate the device near sources of electromagnetic
interference.
•Recommended working position -
the antenna should be directed
upwards.
•Check the availability and quality of
the GSM signal at the antenna
location - use a mobile phone utilizing
a SIM card of the same operator as
that of the datalogger. Search another
installation location if the signal quality
is not satisfactory. It is especially in iron
concrete constructions, cellars, metal
chambers or other shielded rooms that
the GSM signal may be insufficient.

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•This device may be operated as a portable one. In thiskind of operation
avoid the device falling. Try to maintain the proper working position.
•You can screw the device on the wall or some other solid base
•You can fix the device on the wall with the aid of a lockable holder
LP100 (optional accessory)
•Probe installation and cable routing - observe the installation
instructions, realize the recommended operating positions, avoid electric-
power distribution systems. See the chapter „Models produced“for more
information.
•The front panel of the device is protected by a transparent transport foil.
Remove it after installing the device.

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Device set-up
•Connect the appropriate probes and signal leads to the device.
For more information refer to the chapter „Models produced“.
•Install the COMET Vision software into your computer - is available
for free on the address www.cometsystem.com.
•Run COMET Vision software
•Connect the device to the computer - on the datalogger side, use
a USB cable with USB-C connector.
•Setting up the device - with the aid of the COMET Vision program, set
up the device identification, the names of the points to be measured,
the recording mode, the alarms and there signalling. If a PIN code is set
on your SIM card, be sure to set it in the Configuration-Modem-General
section before using the logger for the first time, the default setting is
No PIN code.
•For more information, refer to the chapter „Setting up the device“.
Running the device
•After the set-up - Disconnect the device from the computer and close
the USB connectorwith a closingcap. Checkthat all connectors, including
the antenna connector are properly tightened. The device may be
operated with a USB cable that is permanently connected to a computer
or to a charger. In this case theingress protectionwill be reduced toIP 20.
•Operating the device by means of keys - In the main display mode you
can switch over between individual channels and the display mode
Current / minimum / maximum values by means of the keys. By pressing
a certain key combination, you will enter a menu in which you will be able
to switch the device on or off, to delete the Min/Max values and to disable
the alarm signalling. For more information, refer to the chapter „Operating
the datalogger from the keypad“.
•Charging the batteries - an internal charger will be activated immediately
after connecting the USB charger or after connecting the datalogger
to the computer. The datalogger contains an intelligent charging circuitry
evaluating the battery condition and internal temperature. Charging time
depends on the current battery discharge status The battery charging
process will be initiated only in the case that the battery voltage is low and
the internal temperature ranges between 0°C and 40 °C. Use
the recommended charger type only. During the charging period
the ingress protection is reduced to IP 20; therefore, do the charging
under room (or similar) conditions only. If the battery is very low,
the charging process may be terminated with an error message. In such
a case contact the datalogger vendor to apply for battery replacement.
During the battery charging period the internal temperature of the device
may be slightly raised, which can, for a short period of time, adversely
influence the measurement values of the internal sensors. Therefore,

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the charging speed with the power on is deliberately slowed down
to avoid excessive measurement influence. If you want to charge
the device as soon as possible, turn it off first. When the device is turned
off, the fast charging mode is automatically activated. Fully charged
battery is indicated on the display of the device usually within 6 hours.
•Maintenance and regular checks - for a reliable functioning of the device
it is advisable to perform its regular check-ups. For more details refer
to „Recommendations for operation and maintenance“.
Device disposal procedure
Screw-off the rear cover of the datalogger, disconnect the battery connector
and take out the battery. The device is disposed of as electronic waste.
The battery must be disposed of as hazardous waste. Remember there can
be a SIM card inside the device.

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Operating the datalogger from the keypad
Displaying the device data
Data memory occupancy - this display section offers information
about the current condition of the free space existing in the data memory.
The blinking of the Memory symbol indicates that the preset memory
occupancy limit has been exceeded. This limit can be set up in the device’s
configuration. Several actions can be assigned to it (optical and acoustic
signalling, sending SMS messages).
The memory occupancy is about 75 %, the device is in the non-
cyclic recording mode, i.e. the recording will be stopped as
soon as the memory capacity is full.
The memory occupancy about 75 %, the device is in the cyclic
recording mode, i.e. as soon as the memory capacity is full,
the oldest data will be overwritten.
The memory occupancy 100 %, the device is in the cyclic
recording mode. The preset memory occupancy limit has been
exceeded (The Memory symbol is blinking).
Record status - offers information on whether the recording is ON
and whether it is just running.

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A continuous recording with a preset interval is ON and running.
The recording is ON in the device and it is running at present.
This kind of display is utilized, when the record activity is dependent
on the alarm or the external input condition.
The recording is ON in the device but it is not running at present.
For instance, the rrecording is ON during an alarm only, and there
is no alarm just now. Or, a recording is ON that is controlled by
an external input which not active at the moment.
The LOG symbolis not displayed: The recording isOFF in the device.
The recording is not allowed in any channel in the device’s
configuration.
Meaning of the values displayed - this item specifies the meaning
of the measured values displayed in the two main rows. Beside the currently
measured values the device will also evaluate the minimum and maximum
values from their last resetting by the user. If the device is OFF and has not
been running for some time, then, after it is turning ON, the value of Min /
Max is then set to the values before switching OFF. It can be preset
in the device configuration, whether and in what manner these Min/Max
values will be displayed by the device. Remember that the Min/Max
in question are different from those being recorded.
Neither MIN nor MAX is displayed. You can see values that
have been currently measured.
In both display rows you can see the minimum values measured
since their last resetting by the user.
In both display rows you can see the maximum values measured
since their last resetting by the user.
Alarm condition - this item provides instant information that at least one
of the alarms which have been preset is active. Alarms can be generated by
exceeding the limits that have been preset in individual channels. Moreover,
they can notify of a device failure. In the device configuration you can preset
which conditions should be considered as alarm generating. By means
of the upper key you can easily browse through the values measured in all
device channels (if enabled in device configuration). In the case
that the value is preceded by a bell-like icon, the preset limits (alarms) have
been exceeded in this channel.
GSM modem active - this symbol indicates that a power supply has been
connected to the GSM modem because of some online work.

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Battery condition - this symbol provides overview information
about the current battery charging condition. The charging is indicated
by flashing one of these symbols.
Battery conditions during battery operation of the device:
Fully charged battery
Partly discharged battery
Heavily discharged battery
Totally discharged battery, the device will be switched OFF.
Battery conditions with a charger connected to the battery:
Blinking symbol of an empty battery. There was a deep discharge
of the battery, the charger is attempting to recover battery. If this
condition persists for a long time and the standard charging
process is not renewed, contact your service department.
The battery will have to be replaced.
Indications of individual charging steps when the charging
process takes place in a standard way. If the display shows
the symbol of a full battery, the battery is fully charged
and the charger can be disconnected.
A failure has been detected during charging and the charging
process has been broken off. Try to remove the failure by
disconnecting and reconnecting the charger. If the problem
persists, call the service.
Wait, the charger performs internal testing, or the temperature
inside the device is not within the allowed charging range
(0 to 40°C).
USB interface active –the icon indicates that the device has been
connected to the computer.
Measured value (upper and lower row) - the currently measured value(s)
(or the Min/Max values) are displayed, if the corresponding symbols
in the upper display section areilluminated. The unit name andthe measured
value symbol (1, 2, 3, 4, INT, EXT) are preset by the manufacturer, the user
cannot change them. In addition, it is factory preset whether the measured
value of a particular channel will be displayed in the lower or upper display
unit row. On the other hand, the user has many possibilities to adjust
the appearance and behaviour of individual „screens“. Controlling them can

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take place only manually by the aid of push buttons situated beside
the display unit. The upper push button serves to toggle between
the measured values („the screens“):
The lower push button serves to toggle between the currently measured
values and the Min/Max values:
The device can also be set up to toggle the „screens“ automatically,
in for about 5 sec interval. The cycle can be interrupted by pressing a key.
If you do not want to use the keypad, you can disable it in the device settings.
Display warnings: Displayed when no SIM card is inserted
Displayed if the card requires you to enter
the PUK code. This condition may occur e.g.
if a PIN is activated on the SIM, but PIN code
stored in the device configuration is not valid.
The SIM card requires aPIN code butthe PIN
is not set/enabled in the SW configuration
(Default).

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Menu Options
The menu can be entered by pressing a combination of both keys. In any
case, using the keypad must be enabled in the device configuration.
Individual menu items, too, may be disabled in the device setup. It is e. g.
possible to switch on the device in this way, but it is not possible to switch it
off.
To enter the menu:
Press the lower key and hold it pressed for about 3 s, until bottom menu line
appeared. Then release this key immediately and shortly press the upper key
during the following 4 s.:
You can now work with individual menu items. Press the upper key to scroll
through the menu items, press the lower key to confirm (SET). After
confirming certain choices, the menu will be quit automatically. If the keypad
is inactive for more than 20 s, the menu will close automatically.
Menu items:
Deactivation of the optical (LED diode) and/or acoustic
(the intermittent tone) alarm signalling. The option "Mute optical
and/or acoustic signalling are controlled from local keypad " must
be enabled in the device configuration. If you deactivate (mute)
the signalling (optical and/or acoustic) using the device keypad,
the signalling is automatically reactivated when another alarm
occurs. See page 33 for more details.
Deleting the Min/Max values in the device and it is related only to
values obtained since last reset. This does not concern those
recorded Min/Max values obtained in some other way. Option
must be enabled in the SW device configuration.
Switching the device off. This item is available only if the device
is ON. Option must be enabled in the SW device configuration.
Device switching-on. This item is available only if the device
is OFF. Option must be enabled in the SW device configuration.
Closing the menu.

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Models produced
The models produced differ from one another by types and ranges of values to be
measured. The datalogger’s input channels are invariably assigned to these values. The
user cannot change the measured quantities and their ranges. If GSM communication is
used, it is necessary to pay attention to a sufficient level of GSM signal at the location.
U0110M
One-channel thermometer
This model is equipped with only one internal
temperature sensor, no additional probes and sensors
can be connected. It is characterized by a simple
and compact design and a relatively long response to
a temperature change. The device is placed directly
in the measured area. During the charging period
the measurement accuracy may be affected by up to
1 °C due to parasitic heat.
U0121M
Two-channel thermometer
for external probes
This model can measure one or two temperatures,
which are sensed by Pt1000/E series external probes.
The response to a temperature change depends
on the connected probe design. As a rule, this model
is few times faster than that using the internal sensor. It
is often used to monitor locations where the device itself
is not directly in the measuring space and only probes
are in. The maximum length of each probe lead should
not exceed 15 m. It is recommended to use shielded
cables. To maintain the IP rating, the unused probe
connectors should be provided with a supplied closing
cap.

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U0141M, U0141TM
Four-channel thermometer
for external probes
These devices measure up to four temperatures from
external probes of the Pt1000 series. The response to
a temperature change depends on the connected probe
design but it is usually many times faster than a model
with an internal sensor. It is often used to monitor places
where onlyprobes areintroduced,when thedevice itself
is not directly in the measured area. The maximum
cable length of each probe should not exceed 15 m.
The use of shielded cables is strongly recommended.
The U0141M has a high degree of IP67 protection
and probes with the connector (Pt1000/E) can be
connected to it. To maintain the IP rating, the unused
probe connectors should be provided with a supplied
closing cap.
The U0141TM has a low degree of protection IP20.
The connectorless probes Pt1000/0 series are intended
to this model. The device has not a protection against
the ingress of water or dust. Do not use device at places
where such conditions can be expected.
The probes are connected to the pluggable terminal
block.
Connection:
The procedure for connecting the wires to the terminals
can be found in Annex 4.
U0141M
U0141TM

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U0843M
Two-channel binary-input
thermometer for external probes
This model can measure up to two temperature
values, which are sensed by outdoor Pt1000/0 series
probes. In addition, it is provided with two binary inputs
for monitoring voltage-signal changes or changes
of a signal coming from a dry contact. The binary input
changes are registered immediately, irrespectively of
the recording interval setting. To safe record the input
status, the signalmust be present for at least 1 s. Binary
inputs of this device are not able to capture
connected/disconnected voltage status. Input signals
are connected to a pluggable terminal block.
The response to a temperature change depends
on the probe design. As a rule, this device is few times
faster than the internal-sensor model. The maximum
length of the probe line wire should not exceed 15 m;
the maximumlength of the binary-input cable should not
exceed 30 m. It is recommended to use shielded cables.
The device has not a protection against the ingress of
water or dust. Do not use device at places where such
conditions can be expected.
Connection:
The procedure for connecting the wires to the terminals
can be found in Annex 4.

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U3120M
Compact thermometer -
hygrometer
This model is designed to measure temperature,
relative humidity and dew-point temperature by internal
sensor,noadditionalprobesor sensorscanbeconnected.
It is characterized by a simple and compact design
and a relatively long response to a temperature and
humidity change, compare to model with external probes.
The sensors are located under the grid on the front of
the device. The device is suitable for measuring in places
where there is no rapid change in temperature or relative
humidity, and there is no condensation of water vapours.
Ifwatervapourcondensationoccursinsidethedatalogger,
then the resulting water will remain there and may
damage its electronics. The device is placed directly
in the measured area, while the installation needs to
ensure sufficient level of GSM signal at the installation
location. As the internal battery creates a parasitic heat
during the charging period, the measurement accuracy
may be affected by up to 1 º C.
We recommend calibrating the relative humidity
and temperature of this device in the laboratory
with a sufficient air flow (at least 1 m / s), the reading can
be performed only after thorough settling, which can take
up to 4 hours.
U3121M
Thermometer –hygrometer
for external probe
This model measures temperature, relative humidity
and dew point temperature using an outdoor COMET
Digi/E series probe. Its response to the temperature
or relative humidity change is significantly faster than by
models with internal sensor. This model is often utilized
to monitor areas in which only the probe is installed,
whereas the main unit is installed elsewhere. When
monitoring remote areas, the maximum probe line wire
must not exceed 15 m. The Digi/E series probesprovide
calibrated measurement values. Hence, they may be
replaced without having to modify the device setup.