MODEL 2502
SIGNAL PROCESSOR

Non-Contact Laser Doppler“HIGH-END” DOPPLER
2 Ch LASER DOPPLER VELOCITY METER

Wide Speed Range, include ”0” Velocity
For 2ch Measuring and Operation
with Powerful Analyzing Software

Specifications
Doppler Sensor MODEL 1502S
MethodMODEL 1503＝

High accuracy

L 50mmMODEL 1502S＝

High sensitivity

L 100mm
MODEL 1502S＝

High sensitivity

L 200mm
Accuracy
Power supply
Laser output
Beam spot size
Dimensions
WeigntLaser Doppler system, back-scattering differential type
Focus distance Optimal position at 50±2mm
Measurement range
0 to ±220m/min(0 to ±3.6ｍ/sec), at SF=16.7
Focus distance Optimal position at 100±4mm
Measurement range
0 to ±540m/min(0 to ±9ｍ/sec), at SF=7.2
Focus distance Optimal position at 200±8mm
Measurement range
0 to ±930m/min(0 to ±15.5ｍ/sec), at SF=4.3
Within ±(0.2％+0.1ｍ/min)
Supplied from MODEL 2502
Class 3B：40mWmax・CW・Laser Diode 780nm
Approx, 2mm long by 5mm side (oval)
85(W)x40(H)x150(D), excluding projections
Approx, 0.8kg

Signal Processor MODEL 2502
<Velocity Measurement Section> (Common to both channels)Method
Velocityindication

Digital output

F/V output

D/A output

Digital indication in 5 decimal digits
Min. resolution
0.01(m/min)
Unitm/min, m/sec
Cycle
Approx, 0.2sec, 1sec
Data amount
65536 max (16bit)
Sampling rate
0.1 to 100ms (1, 2, 5 step)
Resolution
0.02 to 0.001(m/min)(Depends on the samplingperiod)る): 0 to ±10V
Accuracy: ±5% FS
any desired full LPF: 1Hz to 5kHz,
scale selectable for selectable for setting
setting
12bit: 0 to ±10V
Accuracy: ±1% FS<Wow & Flutter Measurement Section>(Common to both channels)

Measurement
range
Range
Indication
AccuracyFrequency
band0.15 to 10％ｒms(reffered to a band below fd/1000(Hz))(0. 001% to 10% when FFT is employed)
Five ranges of 0.1, 0.3, 1, 3, and 10％
ｒms, p-p
Within ±5% of full scale of each range
0.5Hz to 5kH(The low-pass filter attenuates frequency higher
than the upper-limit frequency.)

Other Functions
65536 data×6ch, obtainable simultaneously,
Trigger function, A/D function, synchronous
signal inputThis function allows ten different settings to berecalled and stored in the panel.
USB

Internal memory
Panel preset function
External interface

Displacement Measurement Section(Common to both channels)

MethodRange
Minimum
resolution
Display

Digital integration of the Doppler signal
Data refresh rate: Every change of minimum bit in thesignal.
0.001mm to 10m (23bit)
In set gate or continue. (Single/Pass)
Approx, 1μm, 2.4μm, 3.8μm (Depends on S.F. ofsensor), Resolution=100/(6XS.F.) μm
Digital indication in 6 decimal digits
Min. resolution: 0.001mm
Unit: mm・m
Cycle
: Approx, 0.2sec, 1sec

Operations between 2 ChannelsVelocity
operation

Velocity
operation
outputWow &Flutter
operation
Wow &Flutter Output

Format：A-KB, B-KA (K=0±10)
Data amount：65536 maximum
Sampling period ：0.5～100ms (1,2,5 step)：0.02～0.001m/min
Resolution(Depends on the sampling period)： ± 10V
any desired full scale
12bit D/A
selectable for setting.
Voltage accuracy ：Within ±1% of the full scale
Sampling period ：0.5 to 100ms (1,2,5 step)
Format：A-B, B-A, B/A, A/B, (A-B)/A
Data amount ：64000 maximum
Sampling period ：0.1～100ms (1,2,5 step)
The same as 12bit D/A of Velocity operation output

General Specifications
Power supply
Operatingtemperature range
Storagetemperature range
Dimensions
Weight(MODEL 2502)

AC100－240V±10%，50/60Hz，200VAmax
0 to 40℃, without condensation-10 to 60℃, without condensation
426(W)×148(H)×400(D)mm,
Approx, 11kg

Options
Beam bender
The beam bender is an
option to bend thedirection from which
the beam is received
squarely. It is made tomeasure in using thisaccordingtothedirection in which thesensor is not able to beinstalled. Moreover, it ismade to measure byinserting the beam
bender from the narrowgap.

Waveform Analysis Software

Film Velocity Sensor

Ｍ１５０２Ｓ
１５０２Ｓ

Roll Velocity Sensor

Ｍ１５０２Ｓ
１５０２Ｓ

Signal Processor
Ｍ２５０２
USB IF

This new waveform analysis software is available
for calculating and displaying data of velocity ordisplacement between 2 channels.
(The obtained data is 64,000 at the maximum, ineach of 6-channels simultaneously.)
By using this software, the analysis of frequency
and tiny difference in velocity or displacement areeasier than using a spreadsheed software such asExcel.
Functions)
It can analyze graph data either on the upper graphand lower graph; each graph area have 4 datagraphs for comparison between the channels andanalysis.
Items)
velocity F/V (analog), VELO (digital), calculations ofdifferences or ratio in velocity(format: A-B, B-A, B/A, A/B, and (A-B)/A)
subtraction of displacements (format: A-KB), andFFT (frequency analysis), in A and B channel each.
And the obtained and calculated data is saved
either in DAT file (for this software) or CSV file (forExcel).