1. Overview
The SWJ-2 type water head monitor accepts the analog signal sent by the upstream and downstream liquid level sensors, and sends it to the CPU for processing and calculation after A/D conversion. Communication, and parameters such as range, altitude, alarm value, and alarm nature can be set arbitrarily through the keys.
2. Features
The intelligent monitoring device with single-chip microcomputer as the core processor has strong applicability.
Output the standard analog signal corresponding to the range.
Provides alarm status display and four-level alarm output contacts, and the four-level alarm value can be set independently.
The altitude can be set according to the local environment.
With power-off protection, automatic memory function.
Perfect system self-check function.
The working power supply (+24V) of the transmitter can be provided.
3. Technical performance
Display mode: LED highlight digital tube display is clear and intuitive.
Output signal: standard 4-20mA output (load resistance≤525Ω)
Alarm output: Contact form: normally open contact.
Contact capacity: 5A/AC220V, 2A/DC30V.
Alarm setting: The four-level alarm value can be arbitrarily set between the upper and lower limits of the range.
Working power supply: switching power supply AC85~265V, DC110~340V.
Power consumption: 10W.
The instrument provides a transmitter: DC24V power supply, the transmitter does not need an external power supply.
Environmental conditions: Temperature: Working temperature: 0℃~40℃.
Storage temperature: -25℃~+70℃.
Relative humidity: ≤85%RH.
4. Working principle
The water head monitor consists of upstream and downstream liquid level sensors, monitoring instruments and connecting cables. The analog signal output by the sensor is processed and sent to the microcontroller system for processing. The processed data is displayed and converted into 4~20mA analog output. When the monitored liquid level value exceeds the limit, four levels of alarms are output respectively.
5. Panel description
6. Terminals
7. Installation size
The appearance of the instrument and the size of the opening are shown in the following figure:
