SDJ-3B/3L Multi-function Vibration Monitoring and Protection Instrument
The SDJ-3B and SDJ-3L vibration monitoring and protection devices are advanced multi-functional instruments designed for rotating machinery vibration monitoring. These devices utilize two independent SG-2 type velocity sensor signals to continuously display amplitude or velocity values on LED digital displays for each channel.
System Overview
Available in both panel-mounted and wall-mounted versions, these monitoring and protection devices are primarily suitable for critical applications in power generation, steel production, building materials, and chemical industries.
Technical Specifications
| Parameter |
Specification |
| Measurement Range |
SDJ-3B Amplitude: 0-400μm (peak-to-peak)
SDJ-3L Intensity: 0-20.0 mm/s (RMS)
|
| Frequency Range |
10-300Hz |
| Sensor Compatibility |
SG-2 type vibration velocity sensor |
| Display Method |
Independent digital displays for Channels A and B |
| Output Signals |
Current: 4-20mA (corresponding to upper/lower limits)
TDM output for vibration signal analysis
Alarm/Danger switch: Passive contact DC24V/2A
|
| Operating Temperature |
Instrument: -25°C to 55°C (≤80% humidity)
With SG-2 normal temp sensor: -25°C to 100°C
With SG-2W high temp sensor: -25°C to 120°C
|
| Power Supply |
AC220V ±10% / 50Hz |
Installation Dimensions
- Panel Mount (Disc Type):
External: 160mm (W) * 80mm (H) * 260mm (D)
Opening: 153mm (W) * 77mm (H) * 260mm (D)
- Wall Mount:
External: 192.5mm (W) * 290mm (H) * 95mm (D)
Installation: 170mm (W) * 272mm (H) * 98mm (D)
- SG-2 Vibration Sensor:
Dimensions: Ø35mm * 65mm
Fixing Screws: M10*1.5*10mm
Note: Factory default settings are 0-200μm for SDJ-3B and 0-20.0 mm/s for SDJ-3L unless otherwise specified by the user.