Designed for utility metering, flow counting and event logging, the COMET U7844 records from four binary inputs or a combination of two pulse and two binary inputs. Pulse-generating sensors such as flow meters and energy meters can be combined with binary status signals in one device. Review input configuration options and pulse specifications before ordering.
1 READY TO SHIP
COMET U7844 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:3 year warranty
USB Communication cable in not included in the delivery.
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
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
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
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
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
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