Four channel data logger with pulse and two-state inputs
Data logger is designed to record from four binary inputs or from two pulse and two binary inputs.
The recording is performed in a non-volatile electronic memory. The data can be transferred to a PC via USB-C.
Datalogger inputs can be set up for four binary inputs or two binary inputs and two pulse counters.
In case of exceeded set limits alarms are indicated by LED, LCD and acoustically by built-in beeper.
The device includes Traceable calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.
Included in delivery:
- U7844
- Manual
- Traceable calibration certificate
- Technical support at discussion forum
- FREE analytical software COMET Vision
-
codeU7844
-
Warranty3 years
Technical data
Measured value
Two-state signal
Pulses
BINARY INPUT
Parameters of the voltage contact
„L“ level input voltage:< 0,4 V(*);
„H“ level input voltage:> 2 V;
Minimum voltage applicable:0 V;
Maximum voltage applicable:+30 V DC
„H“ level input voltage:> 2 V;
Minimum voltage applicable:0 V;
Maximum voltage applicable:+30 V DC
Parameters of the voltage-free contact
Contact resistance in „switched-on“ state:< 10 kOhm;
Contact resistance in the „switched-off“ state:> 300 kOhm;
Contact voltage in the „switched-off“ state:ca 3 V;
Minimum state duration necessary for latching the state:1s
Contact resistance in the „switched-off“ state:> 300 kOhm;
Contact voltage in the „switched-off“ state:ca 3 V;
Minimum state duration necessary for latching the state:1s
COUNTER INPUT
Counter parameters
Range 24 bits (16 777 215), possibility of letting the counter overflow
Maximum pulse frequency
configured for voltage input - max. 5kHz
configured for a voltage-free or open-collector transistor - max. 200Hz
configured for a voltage-free or open-collector transistor - max. 200Hz
GENERAL TECHNICAL DATA
Operating temperature
-20 to +60 °C
Channels
4x binary input nebo 2x binary input a 2x counter
Memory
500,000 values in noncyclic logging mode; 350,000 values in cyclic record mode
Recording interval
adjustable from 1 s to 24 h
Display and alarm refresh
adjustable 1 s, 10 s, 1 min
Recording mode
noncyclic - data logging stops after filling the memory
cyclic - after filling memory oldest data is overwritten by new
cyclic - after filling memory oldest data is overwritten by new
Real time clock
year, leap year, month, day, hour, minute, second
Power
Lithium battery 3.6V, size AA
Protection class
IP20
Dimensions
61 x 93 x 32 mm
Weight (including batteries)
approx. 120 g
Warranty
3 years
Optional accessories and download
Other accessories
USB-C cable, 1 meter
code
MP053
Self Adhesive Dual Lock
code
MD036
Holder for mounting the Datalogger "U" on magnetic surfaces
code
LP102
Wall holder for datalogger
code
LP100
Lithium battery 3,6V/AA
code
A4203
COMETEO Professional Multi-Plate Radiation Shield for Weather Sensors
Discontinued
COMETEO Professional Radiation Shield for Weather Sensors, actively ventilated with built-in fan
Discontinued
Power detector SP008
code
SP008
SILEX - USB Device server for communication with COMET dataloggers via Ethernet or Wi-Fi
code
Silex
Monitoring Software
COMET VISION - Analytical Software for Dataloggers and Multiloggers
code
CV
Comet Database
code
CDB
Software
Comet Vision Software (2.1.7788.23249 dbapi 20.0)
Comet Database One Click Installer (20.0-IV)
Conversions - application for recalculation of values
Manuals
Instruction Manual
Manual for Calibration (accuracy verification) and Adjustment for Dataloggers Uxxxx(M)
Quick Start Manual
Declaration of Conformity
Catalogs
CATALOG - Dataloggers
Related products
Comet Database
code
CDB
IoT Wireless Four channel Datalogger with pulse and two-state inputs, with built-in GSM modem
code
U7844M
Data logger for 2 voltage inputs 0-10V and 2 external temperature probes
code
U0541
Data logger for 3 voltage inputs 0-10V and 1 two-state input
code
U5841
Data logger for 3 current inputs 0-20mA and 1 two-state input
code
U6841
Reference
Case Study - USB Device server for communication with COMET dataloggers via Ethernet or Wi-Fi
Type of application: Monitoring during transport SOHO (Small Office and Home Office) Industry Healthcare and Laboratory Building Management - HVAC Server rooms and data centers Agriculture Culture
Temperature and Relative Humidity measuring in PHARMACIES and DRUG STORES
Type of application: SOHO (Small Office and Home Office) Industry Healthcare and Laboratory Building Management - HVAC
Measurement of runoff wastewater treatment plant
Type of application: Healthcare and Laboratory Agriculture
Humidity monitoring in family houses
Type of application: Building Management - HVAC
Animal Transportation with Temperature Monitoring
Type of application: Monitoring during transport Healthcare and Laboratory Agriculture
Prague Castle
Type of application: Building Management - HVAC Server rooms and data centers Culture
Masaryk University in Brno
Type of application: Industry Building Management - HVAC