Sennheiser Microphone IAS MO 2000 User Manual

Industry Acoustic System  
IAS-MO 2000 Set  
Instructions for use  
20  
+/- 15dB  
0
0
40  
OVERLOAD  
LEVEL  
GAIN  
 
Contents  
Safety instructions..................................................................................................... 2  
IAS-MO 2000 Set ........................................................................................................ 4  
Delivery includes......................................................................................................... 5  
IAS-MO 2000 Set ................................................................................................. 5  
MZWW 2000 ........................................................................................................ 5  
Product overview IAS-MO 2000 Set........................................................................ 6  
Putting the system into operation ......................................................................... 7  
Setting up the device .......................................................................................... 7  
Rack mounting ..................................................................................................... 7  
Connecting the mains unit ................................................................................ 8  
Connecting the amplifier ................................................................................... 8  
Connecting the optical microphone ................................................................ 9  
Switching the central unit on/off ..................................................................11  
Adjusting the sensitivity .................................................................................11  
Overload indication ...........................................................................................11  
Disassembling the weather and wind protection..............................................12  
Accessories.................................................................................................................12  
Care and maintenance.............................................................................................13  
Specifications ............................................................................................................14  
Connector assignment ......................................................................................15  
Frequency response curve ...............................................................................15  
Manufacturer Declarations.....................................................................................16  
1
 
Safety instructions  
This instruction manual contains important safety information.  
Read this instruction manual.  
Keep this instruction manual in a safe place. Always include this instruction  
manual when passing the system on to third parties.  
Heed all warnings.  
Follow all instructions.  
WARNING: To reduce the risk of fire or electric shock, do not expose the device  
and the mains unit to rain or moisture.  
Disconnect the mains connector from the wall socket to completely discon-  
nect the device from the mains during lightning storms or when unused for  
long periods of time.  
Use only the supplied mains unit.  
Ensure that the mains unit is:  
– always readily operable and easily accessible,  
– properly plugged into the wall socket,  
– only operated within the permissible temperature range (see “Specifi-  
cations” on page 14),  
– not covered or exposed to direct sunlight for longer periods of time in  
order to prevent heat accumulation.  
Use of the MO 2000 CU central unit  
The MO 2000 CU central unit has been designed for use with the MO 2000 H  
optical microphone.  
OPTICAL MIC CENTRE UNIT  
II (2) G [Ex op is T6 Gb] IIC  
II (2) D [Ex op is Db]  
TÜV 07 ATEX 553824  
To meet the requirement of the ATEX directive, the central unit must be  
installed and operated outside areas with potentially explosive atmospheres!  
Use of the MO 2000 H optical microphone  
When installed in the MZWW 2000 weather and wind protection, the  
MO 2000 H optical microphone meets the IP 54 standard for dust and mois-  
ture resistance. In combination with the MZWW 2000, the optical microphone  
is approved and permitted for:  
y use in zone I explosive atmospheres  
0044  
y use in potentially explosive atmospheres of group IIC and temperature class  
T6.  
Rack mounting  
When installing the device in a closed or multi-rack assembly, please consider  
that, during operation, the ambient temperature within the rack may signifi-  
cantly rise above room temperature. However, the ambient temperature  
within the rack must not exceed the temperature limit specified in the speci-  
fications.  
When installing the device in a rack, take good care not to affect the ventila-  
tion required for safe operation or provide additional ventilation.  
Make sure the mechanical loading of the rack is even to avoid a hazardous  
condition such as a severely unbalanced rack.  
When installing the device in a closed or multi-rack assembly, please note  
that intrinsically harmless leakage currents of the individual devices may  
accumulate, thereby exceeding the allowable limit value. As a remedy,  
ground the rack via an additional ground connection.  
2
 
Operation  
This device must be operated only from the type of power supply indicated  
on the type plate. Observe correct polarity!  
Never push objects of any kind through openings of this device as they may  
touch dangerous voltage points or short-out parts that could result in fire or  
electric shock.  
Ensure sufficient ventilation. Do not block any ventilation openings. Install in  
accordance with the manufacturer’s instructions.  
Do not install near any heat sources such as central heating radiators, electric  
heaters, stoves, or other devices that produce heat (e.g. amplifiers). Keep the  
device away from direct sunlight and similar sources of heat.  
Only use attachments/accessories specified by Sennheiser.  
Use the device in dry rooms only. Do not expose the device to dripping or  
splashing and ensure that no objects filled with liquids, such as vases or  
coffee cups, are placed on the device. Do not use the device near water or  
liquids.  
Should a spillage occur, unplug the device and have it checked by a techni-  
cian.  
Service  
No user serviceable parts inside! Do not attempt to service devices yourself as  
opening or removing covers may expose dangerous voltage or other hazards.  
If devices are opened by customers in breach of this instruction, the warranty  
becomes null and void.  
Refer all servicing to qualified service personnel. Servicing is required if a  
device has been damaged in any way, such as mains cable or plug damage,  
liquid has been spilled, objects have fallen inside, the device has been  
exposed to rain or moisture, does not operate properly or has been dropped.  
Intended use of the device  
“Intended use” means that the device should be used within the operating  
conditions and limitations described in this instruction manual.  
“Improper use” means using the device other than as described in this  
instruction manual, or under operating conditions which differ from those  
described herein.  
3
 
IAS-MO 2000 SET  
The IAS-MO 2000 Set system consists of the following main components:  
y 1 MO 2000 Set optical microphone system  
y 1 MZWW 2000 weather and wind protection  
The IAS-MO 2000 Set system meets the requirements of the ATEX directive.  
The MO 2000 H optical microphone consists of an opto-acoustic microphone  
head which is fitted with a fixed 3 m double fiber optic cable. The fiber optic  
cable is connected to the MO 2000 CU central unit. Power is supplied via an  
external wide voltage range power supply unit.  
The MO 2000 H is an omni-directional microphone designed for picking up air-  
borne sound. The components of the MO 2000 H microphone head (outside  
dimensions: 1/2 inch) are made of plastic suitable for permanent stationary  
use in areas where aggressive substances (gases, salts, moisture) or radia-  
tion are present. All components of the MO 2000 H microphone head are  
metal-free, including the fiber optic cable feed.  
The main areas of application of the optical microphone are acoustic mea-  
surement and communication tasks in industrial environments and EMC-sen-  
sitive areas as well as medical magnetic resonance imaging and magneto-  
encephalographic measurement (MEG). Other applications are to be found in  
the field of non-detectable acoustic surveillance.  
4
 
Delivery includes  
IAS-MO 2000 Set  
y 1 MO 2000 H optical microphone with 3 m fiber optic cable  
y 1 MO 2000 CU central unit  
y 1 mains unit with different country adapters  
y 1 GA 2 rack adapter  
y 1 carrying case  
y 1 instruction manual  
Optical microphone  
Fiber optic cable  
MO 2000 CU  
20  
+/- 15dB  
0
0
40  
OVERLOAD  
Mains unit  
d
GAIN  
LEL  
MZWW 2000  
y 1 pipe  
y 1 SCRJ-GOF socket (inside the MZWW 2000)  
y 1 cover with gasket  
y 1 plate/mounting frame  
y 1 SCRJ-HCS socket (fiber optic connector set)  
y 1 windshield basket  
y 1 MZQ 2000 microphone clamp  
Pipe  
Microphone clamp  
Fiber optic connector set  
(not preassembled)  
Windshield basket  
5
 
Product overview IAS-MO 2000 Set  
³
·
»
¿
20  
0
+/- 15dB  
0
40  
OVERLOAD  
LEVEL  
GAIN  
AF OUT  
BAL/UNBAL  
OPTICAL MIC  
INPUT  
DC IN  
12V/150mA  
LEV 6dBu MAX  
´
²
º
¾
µ ¸  
³ Gain switch (coarse adjustment)  
· Level control (fine adjustment), with 0 dB mark  
» OVERLOAD LED  
¿ ON/OFF button  
´ Cable grip for power supply DC cable  
² DC socket for connection of power supply unit (DC IN)  
Audio output (AF OUT BAL), XLR-3M, balanced  
º Audio output (AF OUT UNBAL), BNC socket, unbalanced  
¾ Type plate  
µ SC optical input for microphone  
¸ SC optical output for microphone  
4
5
6
1
7
2
3
Optical microphone  
SC duplex connector  
Mains unit  
US adapter  
UK adapter  
EU adapter (preassembled)  
Fiber optic connector  
6
 
Putting the system into operation  
Risk of staining of furniture surfaces!  
CAUTION!  
Some furniture surfaces have been treated with varnish, polish  
or synthetics which might cause stains when they come into  
contact with other synthetics. Despite a thorough testing of  
the synthetics used by us, we cannot rule out the possibility of  
staining.  
̈ Do not place the central unit on delicate furniture surfaces.  
You can set up the device on an even surface or mount it into a 19” rack.  
Note:  
Do not fit the rubber feet when rack mounting the device.  
Setting up the device  
To ensure that the device cannot slip on the surface on which it is placed, fix  
the supplied four self-adhesive soft rubber feet to the base of the device.  
̈ Ensure that the base of the device is clean and free from grease before  
fitting the rubber feet.  
̈ Fix the rubber feet to the base of the device by peeling off the backing  
paper and fitting them as shown.  
Rack mounting  
Danger of heat damage!  
CAUTION!  
CAUTION!  
When installing the device in a closed or multi-rack assembly,  
please consider that, during operation, the temperature within  
the rack may rise significantly.  
̈ Make sure not to affect the ventilation required for safe  
operation or provide additional ventilation.  
Danger of electric shock!  
When installing the device in a closed or multi-rack assembly,  
please note that intrinsically harmless leakage currents of the  
individual devices may accumulate, thereby exceeding the  
allowable limit value.  
̈ Ground the rack via an additional ground connection.  
For mounting two central units into a 19” rack, you require the GA 2 rack  
adapter. The GA 2 rack adapter consists of:  
y 1 blanking plate ቩ  
0
8
9
y 2 rack mount “ears” ቪ  
y 1 jointing plate ቫ  
y 2 blanking plugs for closing off unused BNC holes  
y 12 recessed head screws M 3x6  
y 2 recessed head screws M 6x10  
A
7
 
To mount two central units into a rack:  
̈ Place the two central units side by side upside-down onto a flat surface.  
9
̈ Align the jointing plate over the holes in the bottom sides of the central  
units.  
̈ Secure the jointing plate to the central units using eight of the supplied  
recessed head screws (M 3x6).  
9
̈ Hook the two rack mount “ears” the front panels of the central units.  
0
̈ Secure the rack mount “ears” to the central units using two of the sup-  
plied recessed head screws (M 3x6) respectively.  
̈ Slide the central units into the 19” rack.  
̈ Secure the rack mount “ears” to the rack.  
To mount only one central unit into a rack:  
̈ Hook the two rack mount “ears” to the front panel of the central unit.  
8
9
̈ Secure the rack mount “ears” to the central unit using two of the supplied  
recessed head screws (M 3x6) respectively.  
9
A
̈ Secure the blanking plate to one of the rack mount “ears” using two  
of the supplied recessed head screws (M 6x10).  
̈ If you are not front mounting the BNC output connector, insert the two  
blanking plugs into the holes of the blanking plate.  
̈ Slide the central unit into the 19” rack.  
̈ Secure the rack mount “ears” to the rack.  
Connecting the mains unit  
̈ Connect the supplied mains unit to the socket (DC IN). Use the cable  
grip to secure the power supply DC cable.  
AF OUT  
BAL/UNBAL  
̈ Connect the suitable adapter to the mains unit .  
DC IN  
12V/150mA  
LEV 6dBu MAX  
̈ Connect the mains unit to the mains.  
The device switches on automatically.  
´
²
Connecting the amplifier  
The audio outputs are available as a balanced XLR-3M output and an  
unbalanced BNC output , allowing you to simultaneously connect two  
devices (amplifier, etc.). Both outputs deliver the same output voltage, are  
short-circuit proof and decoupled from each other.  
AF OUT  
BAL/UNBAL  
DC IN  
12V/150mA  
LEV 6dBu MAX  
̈ Connect the amplifier/mixing console to the balanced XLR-3M output ꢁ  
or the unbalanced BNC output .  
For details on balanced or unbalanced connection, see “Connector assign-  
ment” on page 15.  
º
8
 
Connecting the optical microphone  
Risk of damage to fiber optic cable!  
CAUTION!  
CAUTION!  
CAUTION!  
Fiber optic cable must not be bent like conventional cable!  
̈ When installing fiber optic cable, make sure not to bend it  
beyond a bend radius of 50 mm.  
Signal loss!  
A wrong polarity will reduce the signal strength.  
̈ When connecting the microphone, please observe correct  
polarity.  
Liquids can damage the electronics!  
Liquids entering the housing of the device can cause a short-  
circuit and damage the electronics.  
̈ For outdoor applications, use only a suitable cable together  
with the supplied fiber optic connector .  
̈ Before connecting the optical microphone, remove the protections caps  
from the microphone connections µ and ¸ of the central unit. Keep the  
protection caps in a safe place for reuse during transport or storage. They  
protect the microphone connections against dirt.  
̈ Connect the duplex connector of the professionally ready-made cable to  
the microphone connections µ and ¸ of the central unit. Please observe  
the correct insertion direction of the connector. The duplex connector is  
connected the correct way round when the label on the connector is  
facing downwards as shown.  
OPTICAL MIC  
INPUT  
̈ Connect the fiber optic connector with the professionally ready-made  
µ ¸  
C
cable to the weather and windshield.  
³
³
7
·
Note:  
Make sure that at least 15 cm of the fiber optic cable, starting from the  
radiation source, is outside the explosion-hazardous area.  
9
 
Connecting the optical microphone to the weather and windshield  
̈ Remove the windshield basket and open the flap in the pipe as shown.  
̈ Remove the protection caps from the connectors of the fiber optic cable .  
2
̈ Push down the plastic housing on an even base until the housing detaches  
from the connectors with an audible click.  
Note:  
Use a solid, even and clean base (e.g. a sheet of paper) in order to not  
damage the tips of the connectors.  
̈ Pull the connectors of the fiber optic cable one after the other out of  
the plastic housing.  
2
̈ Remove the protection caps of the SCRJ-GOF socket inside the weather  
and windshield.  
̈ Observe correct polarity of the professionally ready-made cable, i.e. insert  
the connectors of the fiber optic cable into the SCRJ-GOF socket so that  
the polarizing keys point outward. When the connectors are inserted  
correctly, the polarizing keys lock into place with an audible click (see dia-  
gram on page 9).  
̈ Lay the remaining microphone cable around the microphone clamp.  
Please note that fiber optic cable must not be bent like conventional cable.  
Make sure not to bend it beyond a bend radius of 50 mm.  
̈ Insert the optical microphone into the microphone clamp .  
³
·
»
1
B
2
10  
 
Switching the central unit on/off  
After connection to the mains, the device switches on automatically and the  
ON button lights up.  
̈ Press the ON button to switch the MO 2000 CU central unit on or off.  
Note:  
If the power supply is interrupted for several seconds (e.g. due to a power  
failure), the device switches on automatically even if it was switched off  
before.  
Adjusting the sensitivity  
With the microphone connected and both the gain switch and the level  
control set to 0 dB, the specified sensitivity (mV/Pa) is obtained.  
̈ Use the gain switch to increase the output voltage level by 20 dB  
(tenfold increase) or 40 dB (hundredfold increase).  
20  
+/- 15dB  
0
0
40  
̈ Use the level control to steplessly adjust the output voltage level  
OVERLOAD  
between –15 dB and +15 dB.  
LEVEL  
GAIN  
³
·
Overload indication  
The OVERLOAD LED » indicates both positive and negative voltage peaks.  
If the OVERLOAD LED » lights up:  
̈ Use the gain control and/or the level control to reduce the output  
20  
+/- 15dB  
0
0
40  
voltage level so that the OVERLOAD LED » no longer lights up.  
OVERLOAD  
LEVEL  
GAIN  
³
·
»
11  
 
Disassembling the weather and wind protection  
1
2
2
3
7
4
6
5
Accessories  
Cat.-No.  
009823  
525700  
525701  
525702  
522170  
522168  
522169  
522176  
067510  
524601  
502186  
511999  
516503  
Accessory  
GA 2 rack adapter  
MO 2000 H optical microphone  
MO 2000 CU central unit  
Pipe  
SCRJ-GOF socket (inside the MZWW 2000)  
Cover with gasket  
Plate/mounting frame  
SCRJ-HCS socket (fiber optic connector set)  
Mains unit  
Windshield basket  
MZQ 2000 microphone clamp  
Carrying case with foam insert  
Instruction manual  
12  
 
Care and maintenance  
Danger to life!  
WARNING!  
Repairs to explosion-proof components are not allowed. If you  
repair explosion-proof components yourself, this presents an  
explosion hazard.  
̈ Refer all repairs to the manufacturer.  
Liquids can damage the electronics of the MO 2000 CU central  
unit!  
CAUTION!  
Liquids entering the housing of the device can cause a short-  
circuit and damage the electronics.  
̈ Keep all liquids far away from the device.  
̈ Before cleaning, disconnect all devices from the mains.  
Explosion hazard!  
WARNING!  
When cleaning the weather and wind protection, electrostatic  
charges can be generated.  
̈ Use only a soft, slightly damp cloth to clean the weather and  
wind protection.  
̈ Do not use any solvent-containing products for cleaning.  
To clean the MO 2000 CU central unit:  
̈ Before cleaning, disconnect the device from the mains.  
̈ Use a soft, dry cloth to clean the device.  
To clean the MZWW 2000 weather and wind protection:  
̈ Use a soft, slightly damp cloth to clean the weather and wind protection.  
13  
 
Specifications  
MO 2000 CU central unit  
1
Housing  
/2 19” metal housing  
Front panel connections and  
controls  
ON/OFF button with operation indicator,  
OVERLOAD LED,  
gain control (coarse adjustment),  
level control (fine adjustment), with  
0 dB mark  
Rear panel connections and  
controls  
DC socket for connection of mains unit,  
SC duplex input for microphone,  
XLR socket, balanced  
BNC socket  
Power supply  
mains unit with country adapter  
100-240 V AC to 12 V DC, 5.4 W  
Power consumption of CU  
Current consumption  
Gain  
1.5 W at 12 V DC  
120 mA  
steplessly adjustable between +/–15 dB,  
three settings: 0 dB, +20 dB, +40 dB  
AF output level  
15 mV/Pa (level control set to central  
position, gain switch set to 0 dB)  
Output impedance  
approx. 330 Ω unbalanced/660 Ω balanced  
Max. output level  
1.55 V  
Operating temperature range  
Storage temperature range  
0°C to +40°C  
–20°C to +70°C  
MO 2000 H optical microphone  
Design  
MO 2000 H microphone head with  
3 m fiber optic cable  
Pick-up pattern  
Frequency response  
Sensitivity  
omni-directional  
20 Hz to 40 kHz (±6 dB)  
15 mV/Pa  
S/N ratio at 1 Pa SPL  
Max. SPL  
> 50 dB(A)  
134 dB  
Operating temperature range –10°C to +70°C  
Storage temperature range  
–20°C to +70°C  
MO 2000 H optical microphone  
together with MZWW 2000  
complies with the IP 54 standard  
14  
 
Fiber optic extension cable (optional)  
Interface  
Design  
SC  
multimode 200/230 μm  
approx. 3–4 dB per 100 m  
Cable loss  
Optical transducer (optional)  
Interface  
socket/socket  
type SC  
Design  
Coupling losses  
5–6 dB per coupling pair  
AF cable  
Design  
balanced microphone cable with shielding  
Connector assignment  
2
1
+
3
XLR-3F connector, balanced  
DC connector for mains unit  
Frequency response curve  
dB  
20  
15  
10  
5
0
-5  
-10  
-15  
-20  
-25  
-30  
20  
50  
100  
200  
500  
1k  
2k  
5k  
10k  
20k  
50k Hz  
15  
 
Manufacturer Declarations  
Warranty  
Sennheiser GmbH & Co. KG gives a warranty of 24 months on this product.  
For the current warranty conditions, please visit our web site at  
CE Declaration of Conformity  
0044  
This equipment is in compliance with the essential requirements and other  
relevant provisions of Directives 94/9/EC, 2004/108/EC, and 2006/95/EC.  
The IAS MO 2000 Set microphone system complies with the requirements on  
intrinsically safe optical radiation equipment according to EN 60079-0: 2004  
and EN 60079-28:2007. The devices are accompanied by the type-examina-  
tion certificates TÜV 07 ATEX 553824 and TÜV 07 ATEX 553825X.  
Statements regarding FCC and industry Canada  
This device complies with Part 15 of the FCC Rules and with RSS-210 of  
Industry Canada. Operation is subject to the following two conditions: (1) this  
device may not cause harmful interference, and (2) this device must accept  
any interference received, including interference that may cause undesired  
operation.  
Changes or modifications made to this equipment not expressly approved by  
Sennheiser electronic Corp. may void the FCC authorization to operate this  
equipment.  
16  
 
 
Sennheiser electronic GmbH & Co. KG  
Am Labor 1  
30900 Wedemark, Germany  
Phone +49 (5130) 600 0  
Fax +49 (5130) 600 300  
Printed in Germany  
Publ. 08/08  
524194/A01  
 

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