| # |
Attribute |
DEPA |
DEPA Light |
Buzz-o-sonic |
Grindo Sonic |
| 1 |
Frequency
Signal Analysis Method |
Uses special
hardware cards. Fast Fourier Transform (FFT) provides complete Frequency Finger Print. |
FFT
signal analysis depends upon host Computer's multimedia Capability. |
FFT
signal alaysis depends upon host Computer's multimedia Capability. |
2 MHz
clock mixed with audio signal limits usable frequency range. |
|
| 2 |
Performance
Range |
2 Hz -
50 KHz |
5 Hz-
20 KHz depends upon sensor but limited to about 18 KHz by the multimedia card. |
5 Hz -
20 KHz depends upon sensor but limited to about 18 KHz by the multimedia card. |
20 Hz -
100 KHz (claimed) practical 18 KHz |
|
| 3 |
Repeatability
and Accuracy |
Excellent |
Good |
Good |
Poor
because 1, (few ?) samples taken per tap |
|
| 4 |
Hardware
Resolution
a) PC Version
OR
b) Laptop Version |
a. 200 Khz,
+/- 10 V, 16 bit, 305.2 mV
b) 200 KHz, +/- 10V, 12 bit, 4.88 mV |
44.1 KHz,
8/16 bit depend on the host computers multimedia port |
44.1 KHz,
8/16 bit depend on the host computers multimedia port |
Unknown
errors not quantified nor informed to user |
|
| 4.1 |
Special
cards for PC and Laptop |
NI cards
inbuilt capability
a] Temperature drift protection
b] Digital triggering
c] Very high impedance to enhance
measurement accuracy
d] Almost eliminates errors associated with digitization |
No |
No |
No |
|
| 4.2 |
Certification
and compliances |
CE mark compliance |
No |
No |
No |
|
| 4.3 |
Card Calibration |
NIST traceable |
No |
No |
No |
|
| 4.4 |
BUS |
a] Universal
PCI for PC version
b] PCMCIA for Laptop version |
Host computer dependent. No |
Host computer dependent. No |
No |
|
| 5 |
Enhanced Precision |
Availalbe
using online statistics, reporting.
a) Averages.
b) Standard.
c) % Coefficient of variation. |
Availalbe
using online statistics, reporting.
a) Averages.
b) Standard.
c) % Coefficient of variation. |
No |
No |
|
| 6 |
Sensor |
a) Directional
microphone, non-contact, hermetically sealed.
b) Inbuilt 600X op amp to enhance signal to noise ratio so signal can carry to long distance on cable.
c) Software Thresholds that reduce noise interference.
d) Warranted for life |
a) Directional
microphone, non-contact, hermetically sealed.
b)Software Thresholds that reduce noise interference.
c) Supplied with instrument.
d)Warranted for life |
a) Directional
microphone.
b)Thresholds that reduce noise interference.
c) Procured by user |
a) Contact
for most cases recommended
b) Non contact prone to disturbance and noise |
|
| 6.1 |
Sensor Type |
Non contact capactive |
Non contact capactive |
Non contact capactive |
Usually Piezo contact |
|
| 6.2 |
Transfer function |
Linear |
Linear |
Purchased by user |
Linear |
| 6.3 |
Dynamic response |
2 Hz - 50 KHz |
5 Hz - 20 KHz |
5 Hz - 20 KHz |
50 Hz - 18 KHz |
|
| 6.4 |
Sensor's Initial time response |
Better than 1.3 ms |
Better than 1.3 ms |
Purchased by user |
? |
|
| 7 |
Resonant Frequency |
a) Extracted by FFT software
and displayed in Hz.
b) Displayed also in GS Number |
a) Extracted by FFT software
and displayed in Hz.
b) Displayed also in GS Number. |
Extracted by
FFT software and displayed in Hz |
Displays GS
number. |
|
| 8 |
Damping |
a) Online reporting of alpha
and loss factor Q-1 values.
b) Online precision Statistics for Damping.
c) Selection of Frequency (ies) range for which the damping values are desired. |
a) Online reporting of alpha and loss
factor Q-1 values.
b) Online precision Statistics for Damping.
c) Selection of Frequency (ies) range for which the samping values are desired. |
No |
No |
|
| 9 |
Computation of Materials Properties
like Young's Modulus, Shear Modulus, Poisson's Ratio, etc., |
a) Online and reported alongwith
statistical % coefficient of variation and statistical average and standard deviation.
b) Computations done based on ASTM standard (where available).
c) Online switching computation
formulas between ASTM and those suggested by Grindo Sonic, as user may require. |
a) Online and reported alongwith
and statistical average and standard deviation.
b) Computations done based on ASTM standard (where available).
c) Online switching computation
formulas between ASTM and those suggested by Grindo Sonic, as user may require. |
Done off line generally as per ASTM only in an XL file |
Done off line |
|
| 10 |
Bulk Quality Assurance |
a) Can sort in multiple groups (7 Nos.) simultaneously.
b) Online bar graph as you sort.
c) Sorting based on frequency or Grindo Sonic Number (GS value) basis only.
d) Precision sorting can be based simultaneously
on combination of frequency (or grindo sonic number) and damping Q-1. |
a) Can sort in multiple groups [7 Nos.] simultaneously.
b) Online bar graph as you sort.
c) Sorting based on frequency or Grindo Sonic Number (GS value) basis only.
d) Precision sorting can be based simultaneously
on combination of frequency (or grindo sonic number) and damping Q-1. |
No |
a) By adjusting GS value limits (GO NO GO)
b) Sorting possible in only 1 group pass / fail. |
|
| 10.1 |
Automation |
a) Automation ready.
b) Digital hardware
outputs PLC compatible TTL / CMOS 8 Nos. |
No |
No |
No |
|
| 11 |
Range of Materials Tested : Rubber, Resins,
(low frequency) to ceramic small samples (high frequency) |
a) Materials across entire range
till 50 KHz can be tested. specially good for 20 to 50 KHz because of external hardware (NI).
b) Built in 600X opamplifier inside the sensor
c) Specially good for low 2 Hz --> 50 Hz range. |
a) OK up to 18 KHz owing to limitations
of the multimedia card of the computer on which installed and microphone sensor.
b) No amplifier in sensor.
c) Average performance in low range. |
a) OK up to 18 KHz owing to limitations
of the multimedia card of the computer on which installed and microphone sensor.
b) No amplifier in sensor.
c) Average performance in low range. |
Materials at low / high end frequency
range can't be tested. |
|
| 12 |
Use for determination of cracks and small
defects that require reliable determination of minor frequency shifts and damping information. |
a) Available because of powerful
online mse (mean square error) and statistical programs. Damping Program available.
b) Also coefficient of variation % online |
a) Available because of powerful
online mse (mean square error) and statistical programs. Damping Program available.
b) Also coefficient of variation % online. |
No |
No |
|
| 13 |
Service maintenance and compliance |
a) CE certified compliance.
b) World wide NI support.
c)Sensor life time warranty. |
Solid state Sensor with life time warranty. |
Sensor procured by user |
Difficult to maintain / replace contact piezo sensors. |
|
| 14 |
Service backup |
a) Trained representatie in the US.
b) Stocks and spares in India + US. |
a) Trained representatie in the US.
b) Stocks and spares in India + US. |
Only Software supplied hardware buyer's responsibility |
Depends on cards, sensors components from works. |
|
| 15 |
Calibration |
a)Calibrator secondary standard
supplied with certificate. No extra charge.
b) This standard is traceable to our primary standard in our standard room.
c) Primary standard is
calibrated and traceable to ETDC (Electronics Test and Development Centre, Bangalore) where they are calibrated using instruments traceable to NPL (National Physical Lab)
New Delhi. All certificates provided with the calibrator. Hence instrument compatible for ISO certified labs or manufacturing companies. |
a)Calibrator secondary standard
supplied with certificate. No extra charge.
b) This standard is traceable to our primary standard in our standard room.
c) Primary standard is
calibrated and traceable to ETDC (Electronics Test and Development Centre, Bangalore) where they are calibrated using instruments traceable to NPL (National Physical Lab)
New Delhi. All certificates provided with the calibrator. Hence instrument compatible for ISO certified labs or manufacturing companies. |
No Calibrator |
Company certificate with calibrator
supplied at extra charge. |
|
| 16 |
Purchase Cost on 0 (cheap) to
5 (very costly) scale |
3 |
1 |
2 |
5 |
|
| 16.1 |
Hire purchase / rental possibility |
Yes |
Yes |
? |
No |
|
| 16.2 |
Free No commitment demonstration |
Yes |
Yes |
Yes |
? |
|
| 17 |
Mathematical simulation |
a) Available can run 4 equations
at a time.
b) Can check overall software's accuracy in the frequencies and damping values range for the materials under test.
c) Excellent
for training and demonstration.
d) This feature can be used to decide the effect of spectral leakage for the type of filter selected..
e) Excellent
feature for education. |
a) Available can run 4 equations
at a time.
b) Can check overall software's accuracy in the frequencies and damping values range for the materials under test.
c) Excellent
for training and demonstration.
d) This feature can be used to decide the effect of spectral leakage for the type of filter selected..
e) Excellent
feature for education. |
No |
No |
|
| 18 |
Results storage |
To XL files online |
To XL files online |
To XL files online |
Not possible |
|
| 19 |
Data storage |
Can store digitized signals
in data files. Facility to read from data files. |
Can store digitized signals
in data files. Facility to read from data files. |
? |
Not possible |
|
| 19.1 |
E-mailable formats
to exchange test information between independent test stations |
Yes |
Yes |
? |
No |
|
| 20 |
Cursor activated
filters to enable focusing on regions of interest |
Yes |
Yes |
No |
No |
|
| 21 |
Cursor activated
decibel ratio cursors |
Yes |
Yes |
No |
No |
|
| 22 |
Software Templates
to instantaneously set up inspection parameters in factory situations |
Yes |
Yes |
No |
No |
|
| 22.1 |
Templates Saving and Activation |
Yes. Online |
Yes. Online |
No |
No |
|
| 23 |
Spectral Leakage filters numbers |
10 |
10 |
7 |
No |
|
| 24 |
Units |
Metric, Foot Pound
and any combination online |
Metric, Foot Pound
and any combination online |
Metric, Foot Pound
and any combination online |
No only numeric. Off line computations |
|
| 25 |
Zooming in and out |
Yes |
Yes |
Yes |
No |
|
| 26 |
Back calculation Facility |
Yes. Online |
Yes. Online |
Yes. Off line |
Off line computations |
|
| 27 |
Entries Delete Option |
Yes. Single and multiple
back step with automatic statistical recomputation |
Yes. Single and multiple
back step with automatic statistical recomputation. |
Single ? No statistics |
No |
|
| 28 |
Wave Velocity Estimation |
Yes. Both Shear and Pressure Wave |
Yes. Both Shear and Pressure Wave |
No |
No |
|
| 29 |
Online guide to supports
and aspect ratio technique |
Yes. Pictorial |
Yes. Pictorial |
No |
No |
|
| 30 |
Abrasive Alphanumeric Grading Option |
Yes. User activated and configurable. |
Yes. User activated and configurable. |
No |
No |
|
| 30.1 |
Import of earlier Defined Grade
tables into the system for reference |
Yes. |
Yes. |
No |
No |
|
| 30.2 |
Facility to Design Own Abrasive Grading tables |
Yes. Both Off line and On line |
Yes. Both Off line and On line |
No |
No |
|
| 31 |
Online context help |
Yes |
Yes |
No |
No |
|
| 32 |
Preferences whilst saving etc. |
Yes |
Yes |
Yes |
No |
|
| 33 |
Sound Input pop up |
Yes |
Yes |
Yes |
No |
|
| 33.1 |
Noise filtering adjustable
low frequency cut-off filter. |
Yes |
Yes |
No |
No |
|
| 34 |
Print Options |
Yes. All as supported by the Computer |
Yes. All as supported by the Computer |
Yes. Details ? |
No |
|
| 35 |
Volume Setting |
Yes |
Yes |
Yes |
No |
|
| 36 |
Power Supply |
Yes. Special to run Hardware Card, SMPS. |
No. Depends on Computer resources. |
No. Depends on Computer resources. |
In built. |
|
| 37 |
Switch able, Large easy to view screen area |
Yes. Reports main values and results.
Excellent for Shop Floor. |
No. Reports main values
and results. Excellent for Shop Floor. |
No. |
No. |
|
| 38 |
Technical support |
On E-mail |
On E-mail |
On E-mail |
? |
|
| 39 |
Software upgrades |
Free for 1 year |
Free for 1 year |
? |
? |
|
| 40 |
Slicing Digital Data
to fine tune region of interest without having to re-do the experiment |
a) Yes. Cursor
activated
b) Sliced data changes colour |
Yes. Cursor activated
b) Sliced data changes colour |
No |
No |
|
| 41 |
Languages |
a) English
b) German
c) Spanish
All on-line |
a) English
b) German
c) Spanish
All on-line |
a) English only |
Nil numerical only.
Off line computation in other languages. |
|
| |
|
SUMMARY :
DEPA is unmatched in terms of features and price performance
among instruments and systems using IET (Impulse Excitation
Technique) for elastic, damping properties. It's automation readiness is unique too. |
