YD9800 Proximity Transducer System

(Equivalent to Bently Nevada 3300 XL Series Proximitor System )

YD9800 Proximity Transducer System can measure the relative position of the measured object (must be a metal conductor) and the probe end. Because of its features of non contact measurement, long-term high working reliability, high sensitivity, strong anti-interference ability, fast response speed and no oil-water and other medium influence, it is often used for long-term real-time monitoring the shaft displacement, shaft vibration, shaft speed and other parameters of the large rotating machinery, then we can analyze the work condition and failure reason of the equipment, in order to protect the equipment and do predicting repair effectively. It can measure displacement, amplitude, speed, size, thickness, surface unevenness. Analysis on the theory of rotor dynamics and bearing science, the running state of large rotary machines mainly depends on its core-rotating shaft, and the proximity sensor can measure the condition of the shaft directly, the measurement result is reliable and credible.

Section 1 Brief Introduction

The leading science and technology of YD9800 Proximity Transducer System :

1. " the best parameter matching of coil temperature stability" technology ensure a good stability of probe temperature;

2. using the new PPS engineering plastics through" two injection" technology to ensure the good sealing of the probe, dimensional stability and exchange ability, working temperature range expanded to -50℃~+175℃;

3. " deformation connection" technology, higher strength and reliability of probe;

4. " deep negative feedback stability resonant loop" technology, make the preamplifier stability reach (0.05%/℃,0.02%/year );

5. according to the American military standard design and produce, preamplifier can work continuously in the environment

of -50~+105℃;

6. Proximitor circuit adopts the fault-tolerant design to ensure that any wiring errors will not make damage;

7. Proximitor uses the latest electronic technology, power consumption is lower than 12mA;

8. The shell of the proximitor adopts die casting technology, high frequency socket concave, wiring terminal mosaic

protection and engineering plastics insulated structure, in order to make the preamplifier more solid and more convenient

to use and install.

9. Advanced phase frequency characteristics of the testing and control method of the proximity sensor makes YD9800 series products are in the international leading level in the dynamic characteristics.

Application Area

It is widely used for online monitoring and fault diagnosis of displacement, vibration, rotational speed, the oil film thickness of the steam turbine, hydraulic turbine, generators, blowers, compressors, gear boxes and other equipments in the industries of electric power, petrochemical, metallurgical and so on.

Typical application diagram

Technical Index

Diameter of the probe head(mm)	Linear range(mm)	Nonlinear error	The minimum area to be measured(mm)
Φ5	1 (Extended to 2)	≤±1%	Φ15
Φ8	2 (Extended to 4)	≤±1%	Φ25
Φ11	4 (Extended to 8)	≤±1%	Φ35
Φ18	8 (Extended to 12)	≤±1.5%	Φ45
Φ25	12(Extended to 22)	≤±1.5%	Φ50
Φ50	25 (Extended to 30)	≤±2%	Φ100

Probe: working temperature is -50~ +175°C ; temperature drift ≤0.05%/°C

Proximitor: working temperature is -50~ +120°C ; temperature drift ≤0.05%/°C

Interchangeability: error ≤5%

Frequency response: 0 ~ 10 kHz; amplitude frequency characteristics: when 1 kHz, it is -1%; when 10kHz, it is -5%; phase frequency characteristics: when 1 kHz, it is -1 degree; when 10 kHz, it is -100 degree.

Output characteristics:

1. a negative voltage output,

Power supply: -18Vdc~ -24Vdc

Power consumption ≤ 12mA (not including the output current)

2.4 ~ 20mA current output

Power supply: +18Vdc~ +30Vdc

Power consumption ≤ 12mA ( not including the output current )

Installation options

Standard installation

Reverse installation

( a ) usually use a sleeve fix it on the machine

(b) φ50 commonly used methods for probe

The cable side out

Select it when the installation of axial space is small, usually fix it with the clamping block

Flange mounting

Select it when the installation of axial space is small, fix it with bolts

Usually choose the standard installation type probes unless the use of the machine or external mounting bracket installation space probe limit.

Unthread length selection

With 10 mm for the unit,

Minimum no thread length is 0mm 0 0,

Maximum no thread length is 250mm 2 5,

Incremental change is 10mm 0 1

No thread part of the probe is for the convenience of installation; when use the screw to install, the appropriate length of the no thread part can reduce the need length for screwed into the screw hole.

Selection of the shell length

With 10 mm for the unit,

Minimum shell length is 20mm 0 2,

Maximum shell length is 250mm 2 5,

Incremental change is 10mm 0 1

The shell length of the probe depends on the distance between the mounted position and the measured surface.

Selection of the cable length

05:0.5m
1 0: 1.0m

5 0: 5.0m

9 0: 9.0m

Selection of the cable length should consider the distance between the measured surface and the installation position of the proximitor.When use the screw to install, recommend to select 05 (0.5m), 10 (1.0m), ensure that when swirl the probe, the probe cable can rotate with the probe together, it is not easy to break the cable. We need to select an extension cable, total length of the extension cable and the probe is 5m or 9m. Mounted a probe inside of the machine, choose a probe, the total length should ensure that the cable joint is outside of the machine to prevent the oil pollute joint.

Armored selection