DTSF237-1 type multi rate electricity meterDetailed product description：

Main functions
Measurement function (positive active power+negative active power)
Time slot and rate setting function (3 rates, 10 time slots)
Time synchronization function (broadcast time synchronization+single address time synchronization)
Electric energy pulse indication and time period indication
Communication function (infrared communication+RS485 communication)
Programming function (hardware switch+password protection)
Remote meter reading function
Event recording function (reverse power consumption time+programming times+reset times, etc.)
Chinese display (LED display or LCD display)

Technical Features
Designed and manufactured using advanced application specific integrated circuits, SMT, and hot air reflow soldering processes, ensuring reliable quality.
The energy metering unit, data processing unit, and communication interface unit are equipped with three sets of isolated power supplies, and all output signals are optically isolated to improve electromagnetic compatibility performance and ensure stable operation of the metering unit without being affected by communication interfaces.
Designed with a wide voltage range, the meter can operate normally from 154 to 265V and remains undamaged even when the actual voltage reaches 418V, improving its adaptability to the working environment.
The microprocessor adopts an internal and external dual watchdog design to ensure the reliable and normal operation of the CPU. The calculation data adopts triple backup to ensure that the data is safe and sound under harsh interference.
Fully sealed waterproof design, the case material has excellent flame retardant and anti-aging performance, and can be equipped with anti stealing terminal cover.
Dual serial port independent design, infrared communication and RS485 communication do not interfere with each other, and when one of the serial ports is damaged, it does not affect the normal operation of the other serial port.
Temperature compensated crystal oscillator circuit, curve interpolation fitting to ensure clock accuracy.

specification
Model DTSF237
Accuracy levels 1.0 and 2.0
Reference voltage (V) 220
Reference current (A) 2.5 (10), 5 (20), 10 (40), 15 (60), 20 (80)

Main technical parameters

project		technical parameters
basic error		Complies with the requirements of GB/T17215-2002
Rate work parameters	Clock accuracy	≤ 0.5 seconds/day
	battery capacity	≥1000mAh
	Data retention time after power outage	≥ 20 years
	Battery working time after power outage	≥ 10 years
	Clock current after power outage	≤0.5µA
voltage range	working voltage	Normal range 0.7Un~1.2Un, limit 0.65Un~1.9Un
	Voltage circuit power consumption	≤1.0W 5VA
	Current circuit power consumption	≤1VA（Ib）
temperature range	Normal operating temperature	-15～+55℃
	Extreme working temperature	-20～+70℃
	Storage and transportation temperature	-25～+70℃
	ambient temperature	≤85％
product lifespan		More than 10 years
Mean time between failures		≥5×104h(MTBF)
Product dimensions (mm)		110*160*66
weight		About 0.8kg
pulse output	meter constant	1600imp/kWh 3200imp/kWh
	Pulse width of electrical energy	80 ± 20ms Typical value: 80ms
communication interface	Infrared communication speed	1200bps
	RS485 speed	1200bps (typical value) 600, 1200, 2400, 4800, 9600 (optional)
	communication protocol	DL/T645-1997 "Multi functional Meter Communication Protocol" It can also be changed according to user requirements