MODEL 2021
SIGNAL PROCESSOR

Non-Contact Laser Doppler

Compliance FDA/CE marking“INTERNATIONAL DOPPLER”
2 Channel Velocity/Wow-Flutter Measuring System

Safety: Confirming safety standards;
Designed and tested to comply with the laser
safetystandards,
IEC/EN60825-1:2001
andFDA(CDRH). And also meets the requirements ofthe EU Low Voltage Directive (EN61010-1), EMC
Directive(EN61326) and FCC(Part 15B)/CANADAEMI regulation(ICES-003).

Specifications
Wow & Flutter Measurement Section (Both channels)

Signal Processor MODEL 2021
<Velocity Measurement Section> (Both Channels)

Measurement
range

Input frequency
Velocity indication

Range
Indication system
AccuracyFrequency band

Low-pass filter
Wow-Flutter
output(W&F output)

0.15 to 10 ％ rms(referred to a band below
Fd/1000(Hz)) (0.001% to 10% when FFT isemployed)
Five ranges of 0.1%, 0.3%, 1, 3%, and 10%
ｒms, p-p

Within ± 5% of full scale of each range
0.5 Hz to 5 kHz (The low-pass filter attenuatesfrequencies higher than the upper-limit
frequency.)
Same as F/V output
Voltage: 1 V per full scale of each range
Accuracy: Within ±5% of full scale
Output impedance: 1kΩ

Doppler Sensor MODEL 1021 or MODEL 1022
Measurementsystem
MODEL 1021
High speed
Ｌ=100ｍｍ
MODEL 1022
High speed
Ｌ=200ｍｍ
Accuracy
Power Supply
Laser Output
Beam spot size
Dimensions,
WeightMeasurement
accuracy
Velocity output(F/V output)

Averagingvelocity output(D/A output)

Laser Doppler system,
back-scattering differential type
Focal distance
Optimal position at 100±4 ㎜
Measurement range
4.3m/min to 3500m/min （0.07m/s to 58m/s）
Focal distance
Optimal position at 200±8 ㎜
Measurement range
7.5m/min to 6000m/min（0.12m/s to 100m/s）
Within ±0.2%
Supplied from MODEL 2021
Class 3B : 30mW MAX・CW・Laser Diode 780nm
Approx. 5mm wide by 2mm long,
Collimated Beam (oval)
74(W)x37.5(H)x150(D)mm,
Approx, 0.6kg

25ＭＨｚ
Digital indication in 4 decimal digits
Unit: m/min・m/sec
Cycle: Approx. 0.1 sec, 1 sec
Averaging: Average of 2 to 10 movements
Depends on the measurement accuracyof the Doppler sensor
Voltage: 0 to 10 V, any desired full scaleselectable for setting.
Accuracy: Within ±3% of full scale
Low-pass filter: 5Hz to 5 kHz, selectable
Impedance: 1kΩ
12bit D/A output
Voltage: 0 to 10 V, any desired full scaleselectable for setting.
Accuracy: Within ±1% of full scale
Sampling period: 50ms, 500ms
Averaging: Average of 2 to 100 movements

General Specifications
Power supply
Allowable power fluctuation
Electrification protection class
Altitude
Pollution degree
Installation category
Operating temperature range
Storage temperature range
Dimensions and Weight

AC100－240V・50/60Hz・200VAmax
10％Class I
2000m max.
Degree 2Category II
0 to 40 , without condensation-10 to 60 , without condensation
426(W)x148(H)x400(D)mm
Approx, 11kg±℃℃

Operations between 2 Channels
Velocity
operationWow & Flutter
operationOperation
outputComputes and indicates the velocity difference andvelocity ratio of average velocities
Computes and indicates the difference between
and sum of Wow and Flutter in real time
Outputs the velocity operation output and Wow &Flutter operation output in real time (∆VELO output,
MATH output)

Other Functions

Panel preset function

This function allows ten different settings tobe recalled and stored in the panel.