Microflown Scan & Listen User manual

Manual
Address:
PO Box 2205
6802 CE Arnhem
The Netherlands
[email protected]
Scan&Listen
V2.0 2013 - 10
Charting sound fields
icroflown
Technologies

Microflown Technologies
Manual - Scan&Listen device
Page 2 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
Table of contents
I. The Scan&Listen device.................................................................................................................3
1. Setup characteristics ...........................................................................................................3
B. Typical applications.................................................................................................................5
II. Compatible Probes.....................................................................................................................6
III. Components list .........................................................................................................................6
IV. S&L device specifications ...........................................................................................................7
V. Headphones: Beyerdynamic DT 770 M .....................................................................................7
VI. Cabling and Schematics .............................................................................................................8
A. Schematics ..............................................................................................................................8
1. Hardware connections ........................................................................................................8
B. Cables and connectors..........................................................................................................10
C. Re-calibration........................................................................................................................11
VII. Usage and precautions.............................................................................................................11
A. Usage and operation ............................................................................................................11
B. Precautions and not to does.................................................................................................11
VIII. Technical contact .....................................................................................................................11
IX. Warranty policy, repairs and replacements ............................................................................11
A. Warranty and replacement or substitution..........................................................................11
1. Full warranty (year 1 and 2) ..............................................................................................11
2. Grace period (year 3 and 4)...............................................................................................12
3. Repairs outside warranty policy........................................................................................12

Microflown Technologies
Manual - Scan&Listen device
Page 3 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
I. The Scan&Listen device
The particle velocity is a scalar value that was never before audible as human ears are not
sensitive to it. The properties of such magnitude, the particle velocity, make it very suitable for
applications where the background noise and reflections have a high level.
The purpose of the setup, combined with a PU or a Scanning probe, is to easily detect and locate
sound sources, even in the most complicated noise environments.
1. Setup characteristics
a) Functionality
Scan and Listen is a double function device that allows:
Listening to pressure and particle velocity:
Acquisition and recording of both signals
The Microflown particle velocity sensor needs from the setup:
b) Powering
The Scan and Listen device provides power supply to the probe in order to make it functional and
sensitive. There are two modes of powering:
(1) Battery mode
S&L device works with 9V batteries which allow the powering of the probe. This is allows
portability of the system.
The amplification of the signal is then dependent on the battery charge.
The battery level is indicated by the switch color, if green, there is enough battery left to continue
using the battery. If red and blinking it needs to be connected to a power socket or battery needs
to be replaced with a new one.
(2) Powered mode
S&L can be directly connected to a power socket in order to obtain a constant current supply.
This mode is mostly recommended to be used for recording and analyzing the signal in a PC in
combination with a frontend.
c) Amplification
Differently to the Microflown signal conditioner, the S&L device is a simplified version, allowing
High gain operation.
NOTE: If Low gain amplification is needed, then a signal conditioner should be used.

Microflown Technologies
Manual - Scan&Listen device
Page 4 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
Figure 1. High/Low gain amplification
d) Equalization
S&L device is calibrated with the probe in order to apply the best curve fitting into the setup.
The system works as a simplified equalizer for the Listening function, leaving the signal intact for
the signal out function (non-corrected mode).
(1) Listening functionality
The equalization module implemented in the S&L device is simplified compared to the Microflown
signal conditioner electronics. The equalization performed enhances high frequencies applying fc2
filter.
NOTE: The sensitivity of the sensor is constant only in Power mode, in battery mode is dependent
on the battery charge
Pressure channel is only amplified for the listening functionality.
(2) Acquisition functionality
If the Scan and Listen device is connected to a frontend, the pressure and velocity signal need to
be corrected, applying the calibration functions as follows:
Frequency response: Signal [Volts]/ Su or Sp, using the equations below. Obtaining the
response in the selected units
Phase response: Signal [Volts]-φu or φp

Microflown Technologies
Manual - Scan&Listen device
Page 5 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
(a) Velocity sensor model correction:
(2)
Or
(3)
(b) Pressure sensor model correction:
(4)
(5)
NOTE: More information about the calibration of probe and signal conditioner calibration
contained in the probe datasheet.
B. Typical applications
Acoustic problem detection
Sound source location
Fast trouble shooting
End Of Line control

Microflown Technologies
Manual - Scan&Listen device
Page 6 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
II. Compatible Probes
Number of sensors / channels:
PU: 1 pressure sensor and 1 particle
velocity sensor
Packaging:
Regular: ½ inch, 90 mm handle. Package
gain. Lemo connector.
Mini: ½ inch, 42 mm handle. Package
gain. Mini Lemo connector.
Match: 1D - 45 mm length. No package
gain. USB connector.
Maximal threshold level:
Regular
PU match
PU regular
PU mini
III. Components list
Scan and listen device
Headphones
Line out cable
Probe cable
Power supply

Microflown Technologies
Manual - Scan&Listen device
Page 7 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
IV. S&L device specifications
Physical
Height: 24 mm
Width: 79 mm
Depth: 130 mm
Weight: 180 g
General electrical features
Electric impedance: 56 Ohms
Power supply: Input voltage: 15-18 V
Consumption:
max : 1W (56.7mA at 18V)
idle : 0.8W (44mA at 18V)
Fuse: 250 mA
S/N : Lower than probe (included in probe
datasheet)
Harmonic distortion: 20 dB reduction within first
harmonic
Environmental parameters
Variation due to temperature: <0,1 dB (20-55 Deg)
Variation due to humidity: <0,1 dB ( 20-90%)
Function
Characteristics
Modes
Battery mode
Powered mode
Power
9v E-block battery
14-18 V DC power
Listening
Maximum output
power
0,5 W @ 1KHz
1,5 W @ 1KHz
Connector type
3,5 mm jack (to Headphones)
Acquisition
Maximum output
power
Pressure
Velocity
Pressure
Velocity
330mV
330mV
700 mV
330mV
Connector type
3,5 jack (to 2 BNC)
V. Headphones: Beyerdynamic DT 770 M
Transducer Type: Dynamic
Frequency response: 5-30.000Hz
Nominal impedance: 80 Ohm
Nominal SPL: 105 dB
Ambient noise isolation: 35 dBA
Total Harmonic distortion: < 0,2 %

Microflown Technologies
Manual - Scan&Listen device
Page 8 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
VI. Cabling and Schematics
A. Schematics
1. Hardware connections
a) Probe connection
The PU probe is connected via the Lemo Female connector in the front part of the device.
The compatible cables to make such connection are:
PU mini standard cable
PU mini S&L cable
b) Battery mode
To operate the system in battery mode, insert the battery block on
the side of the device.

Microflown Technologies
Manual - Scan&Listen device
Page 9 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
(1) Hardware indications
The indication of the battery status is done in the front panel, illuminating the P-U
switch.
If the battery is charged the switch will be illuminated in green when the
power switch is turned on.
If the battery is nearly empty, the switch led will start flashing and use red
color
NOTE: when using battery mode, the amplification of the signals varies with the
battery charge so if acquisition functionality needs to be used, use the power
mode instead of battery.
c) Power mode
Use this mode always for the acquisition function, to make sure the
signal amplification is constant and calibrated.
To connect the power supply, subtract the battery from the battery
holder, this will give access to the power supply connector.
(1) Hardware indications
When the power connector is used and the power switch turned on, the P-U switch
with led, should be lighted.

Microflown Technologies
Manual - Scan&Listen device
Page 10 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
d) Listening function
1. To use the listening functionality the headphones should be connecter in the
green 3,5 mm Jack connector.
2. To select the channel to witch listen, pressure or velocity, use the lighted
switch installed in the front side of the Scan & Listen device. The velocity
channel is filtered to enhance high frequencies.
3. To select the signal amplification use the Volume switch also installed in the
front panel of the device
WARNING: The headphones cord also has a volume control, make sure it is activated
in case there is no signal on the headphones and the battery indicator is green (full).
e) Acquisition function
The Scan and Listen device can also be used as a signal conditioner and connected to
a frontend to acquire and/or record the pressure and velocity captured signals. To do
so, the Line out connector 3,5 jack connector needs to be plugged in. The other side
of the cable is finished by two BNC connections:
Red output: particle velocity
Black output: pressure
The pressure and particle velocity signals are not equalized so amplitude and phase
need to be corrected with the equations explained in section 1.d.2. a and b.
B. Cables and connectors
Scan and Listen device is compatible with:
Regular probe: PU mini standard cable
Mini probe : Scan and Listen cable
The connector pinning from the Scan and Listen side is:
Figure 2. Cable connections to 4 pin Female connector in Scan and Listen device
1
2
3
1 Ground
2 Pressure
1
3 Particle velocity
4 Plus

Microflown Technologies
Manual - Scan&Listen device
Page 11 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
C. Re-calibration.
The Scan&Listen device needs to be recalibrated with its matched probe every 2 years.
VII. Usage and precautions
A. Usage and operation
Always review the status of the battery before using Listen functionality. Take into account
that the amplification of the signals is battery dependent.
If acquisition functionality is to be used the power supply mode needs to be used.
B. Precautions and not to does
Use parts, connector and power supplies provided with the equipment. Do not use the device with
any cable or extension cable not supplied by Microflown Technologies.
In case of losing some part please consult with Microflown Technologies before using a similar
item.
VIII.Technical contact
For any problem or doubt with your equipment, please contact Microflown Technologies
Customer service:
Mail: [email protected]
Skype: cs.microflown
Telephone: [phone] Monday to Friday , from 9:00 to 17:00 (UTC+1).
IX. Warranty policy, repairs and replacements
A. Warranty and replacement or substitution
1. Full warranty (year 1 and 2)
The warranty period starts on the date of the invoice.
During the first two years (24 month) the Seller offers a warranty on all its Products, except for
trading items and third party manufactured items. The Seller warrants that all Products will be free
from defects in materials and workmanship for this period of two years. During this two years
period, the Seller will repair or replace products free of charge. Products damaged by accident,
abuse, misuse, natural disaster or by any unauthorized disassembly, repair or modification are not
covered by this warranty. The incurred transportation costs of returning the Products to Seller will

Microflown Technologies
Manual - Scan&Listen device
Page 12 of 12
Microflown technologies, Tivolilaan 205 6824 BV, Arnhem. The Netherlands
W: www.microflown.com E: [email protected] T: [phone] F: [phone]
be borne by the Buyer. The logistical cost for returning the Products back to the Buyer will be
borne by the Seller. Several Product come with a “VOID if seal is broken” sticker, the warranty is
void at all time when this sticker is broken.
2. Grace period (year 3 and 4)
During the third and fourth year the Seller offers a Grace Period. In the Grace Period the Products
purchased at an earlier date can be replaced by completely new state of the art Products of the
same scope of the original purchase. This applies only for the Products known as standard probes
and signal conditioners. In the first year of the Grace Period, (year 3) customers have an option to
replace their products for 25 % of the actual ex works end user price. The full freight and
packaging charges apply.
In the second year of the grace period, (year4) customers have an option to replace their products
for 50 % of the actual ex works end user price. The full freight and packaging charges apply.
The new products are accompanied by a new warranty. Both the two years warranty and grace
period becomes applicable again from the date of invoice.
3. Repairs outside warranty policy
Alternatively two years after the purchase, small repairs might be offered all time against
estimated costs to be quoted. Repairs come with six months’ warranty with the same condition as
the two year warranty