1. Overview
The ZWJ axis displacement monitoring device is a main shaft axial displacement monitoring instrument with a unit structure. The monitor uses a high-speed single-chip microcomputer as the core processor, and is equipped with a non-contact eddy current displacement sensor and a preamplifier to monitor the axial displacement of the main shaft of the hydro-generator.
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 secondary alarm output contacts, and the secondary alarm value can be set independently.
With power-off memory, parameter automatic protection function.
Can be replaced to display the gap voltage value of the eddy current displacement sensor
Perfect system self-check function.
3. Technical parameters
Display mode: LED highlight digital tube display is clear and intuitive.
Measuring range: 0-20.00mm (or determined by the user)
Measurement accuracy: ±0.01mm
Sensitivity: 5V/mm (or 2.5V/mm)
Frequency response: 0.5Hz~2500Hz
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 second-level alarm value can be arbitrarily set between the upper and lower limits of the range.
Working power supply: switching power supply AC85~265V, DC120~340V.
Power consumption: 10W.
Environmental conditions: Temperature: Working temperature: 0℃~40℃.
Storage temperature: -25℃~+70℃.
Relative humidity: ≤85%RH.
4. Working principle
ZWJ axis displacement monitoring device consists of eddy current sensor, monitoring instrument and connecting cable and other components. The eddy current sensor monitors the axial displacement of the main shaft, which is sent to the monitor after low-pass filtering, anti-interference processing and output drive. The instrument will process the collected signals for data processing, display and output two-level alarms, and output analog signals corresponding to the displayed values at the same time. Two-level alarms can be set.
5. Terminals
6. Installation size
The appearance of the instrument and the size of the opening are shown in the following figure:
