Bộ ghi dữ liệu cho cảm biến nhiệt độ và độ ẩm | Cometsytem Việt Nam

Bộ ghi dữ liệu GSM bốn kênh với đầu vào xung và hai trạng thái với Modem tích hợp

Four channel GSM data logger with pulse and two-state inputs with built-in modem

U7844M Cometsytem

SM data logger is designed to record from four binary inputs or from two pulse and two binary inputs. In case of exceeded set limits, SMS and JSON messages can be sent via GPRS data connection.It is possible to set the regular sending of JSON messages to COMET Database, the sending interval is adjustable. Alarms are also indicated locally by LED, LCD and acoustically by built-in beeper.
The recording is performed in a non-volatile electronic memory. The data can be transferred to a PC via USB-C.

GSM datalogger inputs can be set up for four binary inputs or two binary inputs and two pulse counters.

The device includes Traceable calibration certificate with declared metrological traceability of etalons is based on requirements of EN ISO/IEC 17025 standard.

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
• 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 battery SONY LiIon 5200mAh
• Protection class IP20