Ⅰ.Brief Introduction
Mainly used in online real-time measurement of radial vibration of rotating machinery rotor shaft. Output shaft diameter to vibration. Early detection, alarm and protection of rotating machinery, so that the machine's operational life lengthened, shortened maintenance cycle unit.
High level of integration, no proximitor, high reliability
YD9820 integrated the function of proximitor and the transmitter .YD9820 only need probe and extension cables. As YD9820 save the proximitor, making monitoring assembly further reduced, so the reliability is greatly improved.
Install easily without any adjustment
YD9820 is extremely easy to install, can be installed in the field or in the control room. The machine measured point: General requirements in the vicinity of the bearing installation of a X, Y two intervals of 90 ° YD9820 transmitter. For a standard double bearing rotating machinery, usually installed 4 sets of vibration transmitter. The parameters have been adjusted and calibrated in our factory. So customer just need to connect the right cables without any adjustments and calibration. YD9820 can connect with our company's 8mm eddy current sensor probe .
Gap of eddy current sensor: Generally adjust GAP output to 10 ± 0.25V.
Fault Monitoring: Monitoring of rotating machinery rotor shaft radial vibration.
Measurement parameters: Radial vibration (displacement) of the peak to peak.
Unit Type: Variety of sliding bearings of rotating machinery. Such as steam turbines, fans, compressors, motors, pumps and so on.
Installation Requirements: YD9820 directly connect with the eddy current probe, extension cable.
Ⅱ.Technical indicators
1. Vibration measuring range: 0-2000um pk-pk
2. The original signal buffered output+2~10V; the max transmission300m
3. Drift:≤ 0.05%/℃ ;
4. Applicable Temperature:(-20~ +70℃)
5. Power Supply:+24 VDC, max working current≤50mA
6. Current output: 4~20mA
7. Max load: 750Ohm
8. Frequency response: 4.0~4000Hz(±3dB)
9. OK Instruction: Green light ON
10. Dimension: 90(W)x35(L)x70(H), 35mm standard rail mounting(compatible with BN300XL series, Sub plate mounting 51x51mm, 4pcs M4*12 Screw
Ⅲ. Installation
Probe Installation
1 Ensure that the test surface is made of 40CrMo or it’s vortex effect is close to 40CrMo. Most of the turbine shaft, blowers and other equipment was made of 40CrMo material or similar material such as 45 steel. Therefore, unless customer specified in the order, or we will usually uses 40CrMo material for specimen calibration.
2 The eddy current effect is mainly concentrated in the surface to be measured . Since the effect of residual magnetism in the formation process, and non-uniform quenching, uneven hardness, the crystal structure will affect the unevenness sensor characteristics. API670 standard test surface residual magnetism is not recommended more than 0.5 micro tesla. The actual measured body should be calibrated if the application requires a higher measurement accuracy.
3 When you measure the radial vibration, each measuring point should install two sensor probes .Two probes are mounted spaced 90 ° (± 5 °) on the same plane on both sides of the bearing.Since the bearing cap is generally horizontally split, so the two probes are usually mounted on each side of the vertical centerline 45 °, the probe is defined as X (horizontal) and Y probe (vertical direction). Usually see from motor end,Y probe should be on the left side to the right of the vertical center line and X probe should be on the right side to the right of the vertical center line.
