Environmental Noise Measurement Kit User Manual
Page 12
External Power Connected
USB Data Connected
The Optimus is receiving power
from an external battery or power
supply
USB is also connected
Internal Battery Packs
The Environmental Noise Measurement Kits are supplied with a rechargeable battery as standard. Within the
case there is space for a second battery pack which can be used to extend the operating life of the system.
The battery packs are connected via red and blue spade connectors. Push the connectors onto the battery or
batteries and check that they are secure before use.
It is recommended that the batteries are removed from the case for charging.
External power does not charge the internal battery or batteries. This is for safety reasons.
Assembling the MK:172 Outdoor Microphone
The MK:172 is a high performance outdoor microphone that has been designed for long term operation.
The windshield has been coated to repel water and to protect the microphone from harsh weather conditions.
The windshield assembly can be removed for calibration.
A 10m cable is supplied as standard with a LEMO plug that connects to the socket on the side of the main
case.
Microphone Capsule
The microphone capsule supplied with the sound level meter should be used with the outdoor microphone.
This capsule is usually supplied attached to the instrument preamplifier. The microphone capsule is shown
below:
It is possible to use an additional microphone capsule with the outdoor microphone. Please contact Cirrus
Research plc or your local representative for details.
To attach the microphone capsule to the outdoor microphone preamplifier, remove the windshield assembly.
Carefully pull the assembly upwards away from the body of the unit.
Carefully screw the microphone capsule to the top of the outdoor microphone preamplifier.
Carefully replace the windshield assembly.
Mounting the Outdoor Microphone
The MK:172 Outdoor Microphone can be mounted onto a standard camera tripod with a ¼” Whitworth thread.
To attach the unit, carefully screw the base onto a tripod and secure.
