Superlux ECM888B User Manual
User guide, Ecm 888b, Description
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Description
The ECM888B is a 1/4" standard measurement microphone with internal
battery. No external power needed for easier connection to various
devices. Such as real time analyzer, PC based measurements, or palm
size devices. Wide and flat frequency response makes this ECM888B an
ideal measurement and recording microphone.
Features
Cautions
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Wide frequency response from 20Hz to 20KHz.
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1/4" industrial standard dimension.
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Omni directional.
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Internal battery, 4LV44, 6V battery.
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All metal structure, durable and long lasting live time.
1. When the microphone is connected, do not un-screw the microphone
that may cause impact signal to the connected system.
2. Turn off the level on the audio system before disconnecting the
microphone.
3. Battery life time is 300 hours. If the signal is low or no signal,
replace the battery.
4. Before replace the battery, disconnect the microphone from the
system.
5. Insert the battery according to the illustrated polarity on the body.
Anode shall point toward the XLR3M plug. Cathode shall point to the
capsule tip. If the battery is not properly inserted, the microphone
will not be damaged, but will not work either.
6. To save the battery power, remove the battery when the microphone
will not be used for a long period.
7. Place foam wind screen when in outdoor to reduce wind noise.
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Specifications
ECM
888B
User Guide
1/4" Measurement Microphone
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© 2007, SUPERLUX I
LB100888B01EN (Rev. 1)
nc.
Back electret condenser
Type
Pressure, FET preamplifier.
Element
Polar pattern
20 to 20,000 Hz (Figure 2)
Frequency response
Sensitivity
(at 1,000 Hz Open Circuit Voltage)
-43dBV/Pa (7.1mV/Pa)
1Pa=94dB SPL
±
3dB
800Ω
Rated impedance
3,000Ω
Minimum load impedance
Equivalent noise level
(A-weighted)
22dB
Omnidirectional (Figure 1)
Max. SPL
(1 kΩ load)
128dB SPL (THD≦1% 1kHz)
106dB
Dynamic range
(1 kΩ Load)
The ECM888B operates between
-10℃ to +50℃(14℉ to 122℉)
with relative humidity between 0
to 95%.
Environmental conditions
Pin 2 output positive voltage
(related to pin 3) when diaphragm
receives positive pressure.
(Diaphragm moving inward)
Polarity
3 pin male XLR type
Connector
Finish
Dimensions
Weight
150g (5.30 oz.), Battery excluded
0.5mA, >300 hour
Current consumption
72 dB
Signal-to-noise ratio
Φ
21.0x170.0mm (0.83x6.70 in.)
Figure 3
Power supply
4LR44 6V battery
Metal construction with
champagne painted finish
The ECM888B, including the
product and packages follow the
instruction of EU 2002/95/EC and
comply to RoHS.
RoHS
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TYPICAL POLAR PATTERN (Figure 1)
8000 Hz
16000 Hz
1000 Hz
2000 Hz
4000 Hz
TY PICAL FR EQUENCY RESPONSE
(Fi gure2 )
dB
10
-10
-20
20
50
100
200
500
1000
2000
5000
10000
20000 Hz
0