Formula Sound SENTRY MK2 Panduan Pengguna - Halaman 8
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Internal Settings
Several optional settings are available internally. These are all shown on a separate drawing
Drg No 879
Internal External Microphone Selection
This is accomplished by the position of two jumper plugs on pin headers. Take care to move both
jumpers and ensure that they connect correctly. The positions are shown on the P.C.B.
External Microphone Phantom power
Phantom power is available for capacitor and electret microphones, two jumper plugs select in a
similar manner to microphone selection. Ensure both jumpers are moved and connected
correctly.
Weighting Selection
The position of one jumper plug selects the response on the measuring microphone. The
positions are shown on the P.C.B. Ensure that the jumper is seated correctly.
Special weighting options are possible - contact Formula Sound for further details.
External Microphone connection
A 3 way terminal strip is provided for the connection of a remote microphone. The microphone
should be low impedance and balanced and good quality twin screened cable should be used for
the connections. Select a microphone with the desired frequency response and directional
characteristics.
Led Indicators
Outputs are provided for remote led indicators:- MIC TAMPER, LEVEL 2, WARNING, RESET
REQUIRED. If more than two leds are to be connected they share a common terminal. Led
current limiting resistors are not required. Leds may be connected directly. These outputs are
also sufficient to drive a contactor with low voltage interface if required.
Timer Adjustment
The period of time that noise "over limit" is tolerated before the unit trips out is variable over the
range of 10 - 70 seconds. If adjustment is required locate the timer pre-set from Drg No 879 and
adjust with a small terminal screwdriver as required. Due to the action of the circuit you may have
to wait up to 70 seconds for the timing capacitor to discharge before new timer settings will take
place.
Lime Technologies
UK
Web: noiselimiters.co.uk
Email: [email protected]
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