Brief Introduction

YD410 displacement monitor is a precision intelligent measurement and control instruments, widely used in electric power,

petroleum, chemical and other departments. It can measure and control thedisplacement of turbine, fan and other rotating

machinery by YDYT9800 eddy current sensor. The instrument is equipped with alarm and shutdown control signal output,

current output connector which can connect with computer and other equipment. The Monitor uses an 80 × 160 (mm)

common chassis,LED digital display, PVC color mask and light touch keys, and it has beautiful appearance, novel style,
reasonable structure, simple installation, stable performance and reliable quality.

Main Function

1. Axial displacement measurement and display, four digital tube displays, the first digit is the sign bit, it can display

    "0 ","-"," 1", "-1"

2. The equipment is with alarm function, while the monitoring displacement exceeds the set value,instruction light on

    the front panel will on and output the on/off signal on the rear panel to protect the monitoring instrument.

3. Alarm and shutoff set value is within the measuring range, user can set arbitrarily.

4. It is equipped with output and RS485 connector which can connect with computer and otherinstrument.

Technical Parameter

1. YD410 displacement monitor
1.1 Signal input:: connect with YDYT9800 serious eddy current sensor
1.2 Input impedance: 35KΩ
1.3 Displacement display: Four digital tube displays, the first digit is the sign bit.
1.4 Measurement range: 0mm~10mm (can confirm according to users’ need)
1.5 Measurement Accuracy:±1%

1.6 Current output: 4 ~ 20mA load:≤  500Ω
1.7 Communication Interface: RS485
1.8 Work environment: temperature: -30 ℃ ~ 60 ℃Relative humidity: ≤ 85%
1.9 Power Supply: AC220V ± 30% 50Hz
1.10 Alarm contact capacity: 220VAC/2A, 24VDC/3A
1.11 Dimensions: 80 × 160 × 150mm (H × W × L)
1.12 Hole Size: 74 × 152 (H × W)
2. YD9800 eddy current sensor
2.1 Probe diameter: φ18mm
2.2 Linear range: 10mm
2.3Sensitivity: 1.6V/mm
2.4 Linearity: 2%
2.5 Frequency Response: 0 ~ 5KHZ
2.6 Probe Length: 70mm, etc.
2.7 Mounting thread: M20 × 1.5mm
2.8 Operating temperature: probe -50 ℃ ~ 120 ℃
2.9 Power Supply:-24VDC

Adjustment and Calibration

Prior to installation state of test monitor, monitor should be adjusted and calibrated to avoid the deviation caused by

transportation, move, and installation environment change and ensure the proper working condition after installation.

Adjustment and calibration mainly test monitor part parameters and compare with the factory parameters, installation

can be proceed if parameter are unanimous, if any change proper adjustment can be done according to instruction,

please contact with us if you can’t adjust to the factory parameter.

2. System Adjustment and Calibration

Install the probe on the displacement test frame, adjust the distance between probe and detection plate be zero, tighten

the screws to facilitate the recording, you can adjust the readings on the percentage screw as a full scale value,

correspondingly connect YDYT9800 eddy current sensor to the rear panel "-24V", "input to" and "input in" of the monitor,

connected to 220VAC supply.Adjust the spacing between measured object and the probe, monitor display in the zero

position, continue to adjust the space between detect plate and probe, reading display on the monitor simultaneously

changes with analog current output at the wiring terminal of the rear panel. Monitor display 00.00mm, the current output is

4mA, Monitor display +10.00 mm, the current output is 20mA.While adjusting, re-confirm zero position according to site

requirement, however, re-confirm zero position have to meet requirement of displacement direction change, always keeping

the probe space in the linear region. After re-confirm zero position, adjust the detect plate on the test frame, so the gap will

be on the zero-position of the machine.After set up, adjust the space between test plate on the calibration frame and the

probe to expand the space wider than any alarm value, check if there is indication on the corresponding alarm indication

lighton the front of the monitor , if there is corresponding on/off output, output contact is as a on/off amount while alarming.

Monitor Installation

1. YD410 Displacement Monitor Installation

Monitor installed in the control room, inserting the monitor to the cabinets from the positive side of the
control room, then installs left and right wing panels from the rear then fix by the screw. Connect the input
and output wire on the rear wiring terminal of the monitor according to the requirement.

2. Probe Installation

Eddy current influence range caused by the probe coil is about 3 times as the probe coil diameter, so the
detected metal surface should be 3 times as the diameter of the probe. No other metal objects is allowed
to exist between the 3 times detected metal surface and the probe, otherwise it will affect the
measurement accuracy. If above requirements can't be meet, re-adjustment for the whole system is
required according to real situation. The metal can't use if the surface is less than 2 times as the probe
diameter, detection interval increase while the installation part of the probe enable the axial displacement
be the positive value. Please remark when ordering if you need axial displacement be positive and the
detected gap reduced.

YDYT9800 Eddy Current Sensor Installation Diagram

Eddy current sensor fix on the unit by the frame, shown in Figure 3, frame designed by the user, it should
be rigid enough to avoid deformation caused by vibration, the probe should fix on the frame firmly, loose
is not allowed.
During site installation, the installation gap between probe and detected metal surface should determine
by the output character of the eddy current sensor and the display range of the monitor
Installation should according to the displacement on the product verification books and the installation
gap stipulate by the voltage characteristics table. After confirmation of the zero position of the measured
displacement machine, calibrated monitor should indicate zero position by adjust installation space when
install the instrument.
For probe installation, after equipped with separate power transmission, gap can be confirmed by
measure the probe output voltage. Do not twist the eddy current coil strongly during probe installation, do
not distort high-frequency cable and disassemble plug arbitrary to avoid damage.

Remark
1. YD410 displacement monitor range set at 0 ~ 10mm, alarm 1:5.00 mm, alarm 2:8.00 mm
2. If user needs only eddy current sensor, monitor and adjust the rack, we can also supply separately.
3. We can design and develop a variety of protection instrument and computer control system according
to users' needs.
4. Quality assurance for one year,durable maintenance and repair.