Comet U0110 User manual

www.cometsystem.com
User‘s Guide
U0110
U0111
U0121
U0122
U0141
U0141T
U0246
U0541
U2422
U3120
U3121
U3430
U3631
U4130
U4440
U5841
U6841
U7844
U8410 USB Datalogger

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© 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
SAFETY MEASURES AND UNAUTHORIZED MANIPULATIONS .............6
GUIDE TO INSTALLATION AND USAGE OF THE DEVICE......................7
Installing the datalogger, placing the probes.................................7
Device set-up................................................................................8
Running the device.......................................................................9
Device disposal procedure............................................................9
OPERATING THE DATALOGGER FROM THE KEYPAD........................10
Displaying the device data..........................................................10
Menu Options .............................................................................14
MODELS PRODUCED.............................................................................15
COMET VISION PROGRAM....................................................................29
SETTING UP THE DEVICE......................................................................30
How to set up the device by means of a program........................30
The device setup from a program (Configuration).......................30
APPLICATION NOTES.............................................................................38
RECOMMENDATIONS FOR OPERATION AND MAINTENANCE...........40
TECHNICAL PARAMETERS....................................................................44
Power supply..............................................................................44
USB communication interface.....................................................45
Measuring, data storage and real time circuitry...........................45
Parameters of datalogger inputs.................................................46
Operating and storage conditions ...............................................62
Mechanical properties.................................................................62
Dimensions.................................................................................64
ANNEXES................................................................................................70
Annex 1: Selected error messages of the device ........................70
Annex 2: Connection of the Pt1000/E series probe connector ...71
Annex 3: Accuracy of the dew-point temperature measurement 72
Annex 4: Connecting the wires to the terminals .........................72
Annex 5: Calculated channels....................................................73
Annex 6: Typical tolerance of the % RH measurement ...............74

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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 and voltage 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
- to be supplied in autonomous manner from an internal primary lithium
battery, CO2sensor models are powered by an internal Li-Ion accupack
that can be charged using a conventional USB charger. Other models
cannot be charged.
- 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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General view of a Uxxxx series datalogger (U0141 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!
•Operating and storage conditions. Observe the recommended operating and storage
condition as quoted in the “Technical parameters”. Models with a CO2sensor containing an
internal lithium-ion accupack should not be exposed to temperatures above 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. 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 asafe 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. If the device shows signs of
unusual behaviour, screw off the rear cover to remove battery or disconnect the accupack
connector. Avoid the removed battery contacting any metallic parts. Any repairs, including
accupack exchange by models with a CO2sensor, may be carried out by suitably instructed
service personnel only. Contact the distributor you have bought the device from.
•Battery charging. Only models with CO2sensors can be charged. 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 - For criticalpurposes, never relysolely on this equipment(rescue systems,safety
systems, etc.). Note that redundancy is essential for systems with high functional reliability.
Further information can be found e.g. in IEC 61508.
•Recommended accessories. Use only accessories that are recommended by the producer

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Guide to installation and usage of the device
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 - for models with internal humidity
sensor (U3120, U3631, U4130, U3430 and U4440) with USB connector
down, for others any:
•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.
•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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•You can fix the device on the wall with the aid of a lockable holder
LP100 (optional accessory).
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.
•For more information, refer to the chapter „Setting up the device“.

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Running the device
•After the set-up - Disconnect the device from the computer and close
the USB connector with a closing cap. Check that all connectors are
tightened properly. The device may be operated with a permanently
connected USB cable. In this case the ingress protection will be reduced
to IP 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 - applies only to models with a CO2sensor
(contains Li-Ion accupack), other devices cannot be charged. 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 themeasurement values ofthe internal
sensors. Therefore, 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, take out the battery. The device
is disposed of as electronic waste. The battery must be disposed of as
hazardous waste.

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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 pre-set 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).
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 pre-set memory occupancy limit has been
exceeded (The Memory symbol is blinking).

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Record status - offers information on whether the recording is ON
and whether it is just running.
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 symbol is not displayed: The recording is OFF 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 pre-set
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 pre-set is active. Alarms can be generated by
exceeding the limits that have been pre-set in individual channels. Moreover,
they can notify of a device failure. In the device configuration you can pre-
set 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 bya bell-like icon, the pre-set limits (alarms) have been
exceeded in this channel.

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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.

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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 and themeasured
value symbol (1, 2, 3, 4, INT, EXT) are pre-set by the producer, the user
cannot change them. In addition, it is factory pre-set 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
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.

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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 chapter „Mute of signalling“ 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.
U0110
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. The battery in the device cannot
be charged.
U0122
Two-channel thermometer
with external probe
This model allows to measure the temperature
of the internal sensor and one external probe series
Pt1000/E. The response to a temperature change
depends on the connected probe design but is usually
much faster than the response of the internal sensor. It
is often used, among other things, tomonitor largeareas
where a device requiring individual monitoring is
located. 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. The battery in the device cannot be charged.

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U0111, U0121, U0141, U0141T
One-channel, two-channel
and four-channel thermometer
for external probes
These devices measure one, two or up to four
temperatures from external probes of the Pt1000 series.
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
directlyinthemeasuringareaandonlyprobesarein.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. The
battery in the device cannot be charged.
The modelsU0111, U0121, U0141 have a high degree
of IP67 protection and probes with the connector
(Pt1000/E) can be connected to it. In order to maintain
the degree of protection, it is necessary to provide
unused connectors with the supplied cover.
The model U0141T 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.
U0111, U0121, U0141
U0141T

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U0246
Datalogger with 3 inputs
for thermocouples
and 1 input for external probe
Pt1000
This model has three ±70 mV DC voltage inputs
with support for temperature measurement using basic
types of thermocouples, an external probe
of the Pt1000/0 series can be connected to the fourth
input. The device also measures the internal
temperature. The inputs are not galvanically isolated
from each other. Make sure that neither the probe wires,
nor the thermocouples are electrically connected to any
other conductive elements! Any electrical connections
between thermocouples can cause serious
measurement errors or unstable values! For correct
measurement, it is necessary that there are no rapid
temperature changes around the device. Avoid
installing the device in places where the temperature is
not stable dueto air flow,sunlight, or other heat sources.
Supported thermocouple types (wire marking according
to ANSI):
Thermocouple type
Wire colour +
Wire colour −
K (NiCr-Ni)
Yellow
Red
J (Fe-Co)
White
Red
S (Pt10%Rh-Pt)
Black
Red
B (Pt30%Rh-Pt)
Black
Red
T (Cu-CuNi)
Blue
Red
N (NiCrSi-NiSiMg)
Orange
Red
The input signals are connected to the pluggable
terminal block. The device has IP20 protection. 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 maximum length of the
wires to the inputs must not exceed 15 m. It is
recommended to use shielded cables. The battery
in the device cannot be charged.

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Connection:
The procedure for connecting the wires to the terminals
can be found in Annex 4.

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U0541
Two-channel thermometer
for external probes
with 2 inputs 0-10 V
This model can measure up to two temperature values,
which are sensed by outdoor Pt1000/0 series probes.
In addition, it has two voltage inputs for monitoring
voltage signal changes. 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 temperature
probe should not exceed 15 m; the maximum length of
the voltage-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.
The battery in the device cannot be charged.
Connection:
The procedure for connecting the wires to the terminals can
be found in Annex 4.

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Compact pressure gauge with
external CO2probe
This model allows to measure the barometric pressure
by the internal sensor and concentration of CO2
in the air by the external probe.Barometric pressure can
be measured as absolute or recalculated to sea level.
Accupack in the device can be charged. In battery
mode, this model has significantly shorter battery life
than models without CO2 concentration measurement.
For this reason, the measurement of CO2concentration
does not occur as often as the measurement of other
variables. By default, this is 2 minutes with the option
of extending up to 10 minutes (option available
in the COMET Vision software).
U3120
Compact thermometer -
hygrometer
This model is designed to measure temperature, relative
humidity and dew-point temperature by internal sensor,
no additional probes or sensors can be connected.
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. If water vapour
condensation occurs inside the datalogger, then
the resulting water will remain there and may damage its
electronics.The deviceis placeddirectly in the measured
area. The battery in the device cannot be charged.
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 afterthorough settling, which can take up
to 4 hours.
U2422