Page 1
®
6955 VALJEAN AVE, VAN NUYS, CA 91406
PH: (818)994-6498 / FAX: (818)994-6458
/ www.louroe.com[email protected]
INSTALLATION AND OPERATING INSTRUCTIONS
VERIFACT L-DT
AUDIO MONITORING SYSTEM
DESCRIPTION
The Model Verifact L-DT is a bi-directional electret
®
condenser microphone with built-in preamp. It can pick
up normal sounds approximately 10 ft. away. Sound
pickup on both sides of the microphone is lower than
the front and back where the microphones are located.
Verifact L-DT produces low impedance line level
®
output and can be located up to 1,000’ from the Louroe
base station. It is primarily designed for ceiling
mounting but can also be installed on any type of flat
surface. The Verifact L-DT is compatible with all
®
Louroe Audio Base Stations or Louroe Audio Interface
Adapters.
®
NOTE:
Verifact L-DT Microphone is not recommended
®
for outdoor use or in areas with high moisture
content.
F
U
N
A
M
SPECIFICATIONS
Sensitivity (mic)
Frequency response
Output
Current drain
Supply voltage 12 Vdc
Microphone housing High impact ABS
Dimensions
Weight
Shipping Weight
-45dB
300 Hz to 10kHz
Line Level (0 dB, 1KW @ 1kHz)
10mA
4 3/8”L x 2 1/4”W x 1 1/5”H
2.5 oz
1 lb
U
R
T
E
C
D
A
I
N
T
H
E
MIC ELEMENTS
IMPORTANT NOTICE
When this equipment is used as part of an
audio monitoring system, the law requires
that the public be given notice of AUDIO
MONITORING ON THE PREMISES. A
deca l noti ce is in clud ed with each
microphone shipped.
Federal Law References:
Federal Regulations, US Code, Title 18.
Crime and Criminal Procedure, Sec 2510.
AUDIO
MONITORING
On
These Premises
®
LOUROE ELECTRONICS warrants that at the time of shipment products manufactured by LOUROE ELECTRONICS to be free of defects in material and workmanship.
Should a defect appear within one year (12 months) from date of shipment, LOUROE ELECTRONICS will, at its sole discretion, repair or replace the defective equipment.
This equipment shall not be accepted for repair or return without prior notification by LOUROE ELECTRONICS .
This warranty does not extend to any Louroe product that has been subjected to improper or incorrect installation, misuse, accident, or in violation of installation
instructions provided by LOUROE ELECTRONICS.
Returned shipments to LOUROE ELECTRONICS shall be at customer’s expense. LOUROE ELECTRONICS will return the equipment prepaid via best way.
LOUROE ELECTRONICS 6 9 5 5 V A L J E A N AVENUE, VAN NUYS, CA 91406 TEL (818) 994-6498 FAX 994-6458
®
®
®
®
WARRANTY
®
®
®
(818)
website: www.louroe.com e-mail: [email protected]
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INSTALLATION AND OPERATING INSTRUCTIONS
ELECTRICAL CONNECTION
The Verifact L-DT has 2 mounting holes for surface mounting to a ceiling or other flat surface. It should be
positioned so that the front and back microphone elements are 4’ to 8’ from the area of desired coverage.
MICROPHONE CONNECTION (See interconnection diagram in the next page)
A 3-pin terminal block is located on the back of the microphone housing, marked A, B, C.
If using West Penn 452 or equivalent with same color code, connect:
CONNECTING VERIFACT L-DT MICROPHONE TO A LOUROE™ BASE STATION OR AUDIO
INTERFACE ADAPTER
All Louroe audio base stations and Interface Adapters have corresponding terminal blocks marked A, B, C.
Connect other end of cable as follows:
®
A represents +12 Vdc Power
B represents Audio Output
C represents Ground
1. Red wire (12 Vdc) connects to terminal A of microphone terminal block
2. Black wire (audio out) connects to terminal B of microphone terminal block
3. Bare wire (ground) connects to terminal C of microphone terminal block
®
1. Red wire from microphone connects to pin A of Base Station (12Vdc)
2. Black wire from microphone connects to pin B of Base Station (Audio Output)
3. Bare wire from microphone connects to pin C of Base Station (Ground)
CONNECTING VERIFACT L-DT MICROPHONE TO OTHER AUDIO DEVICES.
®
If a Louroe audio base station is not used and microphone is being connected directly to another receiving
device from other manufacturers, 12 Vdc power must be applied to terminals A and C. (A is positive, C is
negative). Terminals B and C of microphone (C is common) go to the “Audio In” or “Line in” of the audio
source. A shielded cable is recommended.
INSTALLATION TIP: If the area to be monitored for audio is noisy or has background disturbances, the
microphone elements should be positioned facing the subjects (front and back). Since the unit is bi-directional,
the sound from the subjects facing the microphone elements are more louder than background noise coming
from the sides of the microphone.
INSTALLATION TIPS
1. Use overall shielded audio cable only. West Penn 452, Belden 8451 or equivalent.
Unshielded cable is not satisfactory for sound system.
2. When used at a cash register checkout, microphone should be installed between the casher and the customer with the
microphone element facing them.
3. Avoid installing microphone near air vents, air conditioners, fans and other equipment that generate
high sound and air pressure.
4. If microphone is installed in a police interview room, room should be conditioned with any type of carpeting, acoustical
ceiling tiles, acoustical foam, etc. to reduce echo. This will enhance the quality of live and recorded audio.
5. When using a base station such as the APR-1 and microphone should have a barrier or solid wall between them in
order to avoid audio feedback, especially when they are in close proximity to each other. If no barrier, microphone
should be at least 25’ from APR-1 to avoid acoustical feedback.
LOUROE ELECTRONICS 6 9 5 5 V A L J E A N AVENUE, VAN NUYS, CA 91406 TEL (818) 994-6498 FAX 994-6458
®
website: www.louroe.com e-mail: [email protected]
Page 2 of 4
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L_DT_mic-inst_12/14
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INSTALLATION AND OPERATING INSTRUCTIONS
INTERCONNECTION DIAGRAM BETWEEN THE VERIFACT L-DT
®
AND RECEIVING DEVICES SUCH AS A BASE STATION
OR AUDIO INTERFACE ADAPTOR
B A C K S I D E O F
V E R I FA C T L-DT
M I C R O P H O N E
®
A B C
WIRING REQUIREMENTS
2 Conductor shielded cable, 22
gauge with a 24 gauge drain
wire.
RED
BARE
NOTE: Unshielded cable is not
satisfactory for audio
systems.
BLACK
A = +12Vdc (RED)
B = Audio (BLACK)
C = Ground (BARE)
BLACK
RED
B
A
TO LOUROE™ BASE STATIONS AND AUDIO INTERFACES
OTHER AUDIO RECIVERS AND RECORDERS
BARE
C
OR
LOUROE ELECTRONICS 6 9 5 5 V A L J E A N AVENUE, VAN NUYS, CA 91406 TEL (818) 994-6498 FAX 994-6458
®
website: www.louroe.com e-mail: [email protected]
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L_DT_mic-inst_12/14
Page 4
CONNECTING A LOUROE MICROPHONE DIRECTLY
TO AN IP CAMERA, ENCODER OR DVR WITH 3.5mm
12 Vdc POWER SUPPLY
INSTALLATION AND OPERATING INSTRUCTIONS
MONO AUDIO INPUT
MICROPHONE TERMINAL BLOCK
A
B
C
+12 Vdc
+
_
GROUND
A = 12Vdc Power
B = Audio Output
C = Ground
LOOP “C” WIRE THRU OPENING, THEN SOLDER
“B” WIRE
3.5mm MONO PLUG REMOVED
FROM JACKET
TO LINE LEVEL INPUT OF IP CAMERA OR
DVR WITH 3.5mm MONO AUDIO INPUT
OTHER PLUGS WIRING CONFIGURATION
Black Wire
Red Wire
S
T
E
R
E
O
Audio In
of receiver
3.5mm Stereo CONNECTION
Red Wire
Black Wire
R
C
A
Audio In
of receiver
RCA CONNECTION
LOUROE ELECTRONICS 6 9 5 5 V A L J E A N AVENUE, VAN NUYS, CA 91406 TEL (818) 994-6498 FAX 994-6458
®
website: www.louroe.com e-mail: [email protected]
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