MODEL 2511
SIGNAL PROCESSOR

Non-Contact“PROTECT DOPPLER”
VELOCITY-LENGTH METER

Wide Speed Range, include ”0” Velocity
High accuracy on length measuring
Velocity monitoring and control forproduction line. Drip-proofed sensor
Offering to improve old productionline , of course also for new lineOutline
MODEL-2511 is a non-contact velocity meter using Laser Doppler method, which is suitable for measuring thevelocity and length in production lines such as iron, nonferrous metals, construction materials, fibers, and thefilms.
There is a domination point of high accuracy in non-contact method compared with the traditional contact type,when this measuring instrument is used for the velocity determination and the velocity control of production line.
In addition, MODEL-2511 is suitable for high accuracy length measurement.
And, to use it at ease in the production line, it has environment-proof of measures and various state watch
outputs of the sensor.
Moreover, it has the interpolation function when beam is shut out while measuring.
In addition, the operation is easy, and is reasonable priced.

Features
1. It is a non-contact measuring. The velocity determination and the length measurement can be done in highaccuracy.
2. There is neither slipping nor wear-out for the non-contact measuring. Therefore, it is possible to use it in thefield in the large range because it is not worried that the product is damaged.
3. The sensor has splash-proof construction for heavy-duty uses as air purge unit (option) etc. are available.
4. The sensor and the signal processing machine have the state monitoring function under the measurement.
Moreover, it has the interpolation function when light is shut out while measuring it. The security precautionthat is appropriate for the case used to control the manufacturing device is given.
5. It is suitable to make to high accuracy and high efficient, and to make not only use to new production line
but also the old one. Replacing it with the rotary encoder of the production line can raise the performance
more.

Specifications
Doppler Sensor MODEL 1511
MethodMODEL 1511
L=200mmas standard
Accuracy
Power supply
Laser power
Beam spot size
Dimensions,
WeightLaser Doppler system: Back-scattering differential type
Focal distance
Optimal position at 200 ± 8 mm
Measurement range ±900m/min
Also –200 to +1400m/min as optional (at SF=4)
Within ±(0.2％+0.1m/min)
Supplied from MODEL 2511
Class 3B : 40mWmax・CW・Laser Diode 780nm
Approx: 2mm wide by 3mm wide, oval
100(W)×50(H)×160(D), excluding projections
Approx, 1.4kg

Signal Processor MODEL 2511
<Velocity Measuring Section>
Velocity
indication

Velocity output

Condition Monitoring System
Interpolation
Material monitor
velocity monitor
function
Other condition
outputOthersLaser active, Abnormal temperature in a sensor,
Material, Tracking ON, Interpolating, Healthy,
Doppler level :1 to 5, Velocity monitoring.,
Panel pre-set: Can store and recall with 10settings.

General Specification
Power supply
Operatingtemperature
range
Storagetemperature
range
Dimensions andweights(MODEL -2511)

AC100－200V ±10％, 50／60Hz 200VAmax
0 to 40℃, without condensation-10 to 60℃, without condensation
300(W)×148(H)×300(D)mmapprox, 5.4kg

Lengthmeasurement

Digital indication in 5 decimal digits
Min. resolution
0.001(m/min)
Unitm/min
Cycle
0.2sec, 1sec
Averaging
2 to 16 times moving average
Wow Flutter
Calculated from the maximum
and the minimum value in thedisplay cycle.
D/A output
Output Voltage
0±10V，12bit D/A output
Full scale adjustable
AccuracyWith in ±1％ at full scale
Sampling rate
2ms, 5ms, 10ms
Min. resolution
0.001m/min（at 10ms）
Averaging
2 to 256times（2n）moving average
Output1kΩ
impedance
Digital output
Output type
20bit binary＋1bit additional out.
Open collector 30V，50mA
Sampling rate
2ms, 5ms, 10ms; inhibit output
Min. resolution
0.001m/min
Averaging
2 to 256times（2n）moving average
Length±0.9mm ～999999.9m
measurement
Digital indication in 7decimal digits
rang
Pitch pulse
0.1mm ～ 100mm A ， B 90 °outputPhase difference output.
Open collector 30V，50mA
Gate for length Material signal or external gatemeasurement
input
signal.
Signalslope:
selectable.