SLC1 SPL Meter Trigger a Relay     The Model SLC1 is a single rack space Sound Pressure Level meter with special triggering circuits. When monitored sound exceeds a specified level, a relay connected to a switched output is activated. The switched output can then activate connected ancillary equipment which can be used to notify the manager, light a light, ring a bell, or activate a compressor. It can even be used to activate a counter to determine how often sound exceeds the specified level. The choice of ancillary equipment is made by the installer to accommodate the particular situation. A second relay allows the SLC1 to reduce sound levels by 6dB (20%) for 5 seconds. This feature is designed to encourage performers / DJs to reduce to the specified sound level.                                              TriggeringCircuit: This circuit will respond when the SLC1 monitors a sound which is over the user's specified level. A switched output control relay and an audio attenuation circuit will be triggered.                                                                 Switched Output Control: The SLC1 provides a rear panel mounted terminal strip to which an installer can connect ancillary equipment suitable for the installation. This terminal strip becomes "active" when the switched output control relay is triggered. Connected equipment can range from a simple light bulb to a heavy duty solid state relay capable of handling multiple announcement devices.                                                                             Audio Attenuation Circuit: The SLC1 will accommodate two audio channels. The input and output connectors for these channels are hard wired through the unit and will not interfere with the sound quality. If connected, the audio attenuation circuit will reduce the all over sound level by 6db (20%) for a 5 second interval. If the sound level is not reduced the circuit will be repeatedly activated to reduce the sound level for 5 second intervals.The switched output control circuit and the audio attenuation circuit can be utilized simultaneously or independently.   Features   l The Controls SLC1 Package Contents: l SLC1 SPL Meter Trigger a Relay l MK8 Mini Microphone 123dB SPL l Certification calibration report SLC1 Accessories: l Certification calibration report SLC1 l AC/DC 12 volt 500 milliamp power adapter (3.5mm jack)   Specifications   Measurement Range: Microphone input: 47dB - 123dB SPL Inputs: Microphone: XLR 3 pin jack. Pin (1) Ground, Pin (2) Hot, Pin (3) Neutral.   Audio: RCA jacks. (2) Outputs: Switched terminals: Fused 2 position terminal strip rated @ 1A, 125Vac.   Audio: RCA jacks (2) Microphone: 600 ohm omnidriectional electret condenser. Model MK8. (Cable not included) Display (SPL): 3 digit via 7 segment display. Trigger Level: 60dB - 120dB typical Response, Recovery Times: Inter-related, varies depending on type of signal vs. control settings. Reset Delay: 10s - 120s. Monitored Source Level Reduction: 6dB (20%) for 5s. Weighting: IEC A, C and Flat. Power: 12Vdc @ 500mA via 3.5mm jack (battery eliminator supplied). Size (W x H x D): 19" x 1-3/4" x 8½" Weight: 3 lbs. Case Material: Painted aluminum Approvals: CE, RoHS and WEEE