Environmental Noise Measurement Kit User Manual
Page 11
Remove the protective cap and insert the plug. Pull back the body of the connector to release.
External Power Connector
External power is connected via the 4-Pin socket. Remove the protective cover where fitted and insert the plug.
Pull back the body of the connector to release.
The kits can be powered from a range of external sources which allow operation over long periods. This can be
essential for long term continuous monitoring projects or where it is not possible to access the equipment on a
regular basis to replace or recharge the internal battery power.
External power in the range of 12-18V DC can be connected to the kit via the input socket on the side of the
case. The optional ZL:673 cable can be used to connect external batteries to the case.
Where mains power is available, the CU:612 External Power Supply can be used. This provides a stable power
source to the kit and can be used alongside an internal battery, further extending the operating life of the
system.
External power must only be connected via an optional ZL:673 cable or the CU:612 Mains
Power Supply.
The charger that is provided with the battery pack is not weatherproof and must only be used to
charge the internal battery packs.
Checking the power supply to the sound level meter
Please ensure that the optimus sound level meter is receiving power from the battery packs and that the battery
packs are charged before leaving the equipment.
If the optimus is not receiving external power, it will run for approximately 12 hours on its 4xAA internal
batteries (when these are new) and will then switch off.
There are different conditions under which these power indicators will show.
The table below shows the different power states.
Table 1 Battery Indicators
Indicator
Power Source
Notes
Internal Batteries
External power is not connected
Internal Batteries
External power is not connected.
Internal batteries are low.
Internal Batteries
USB Data is also connected
External power
The Optimus is receiving power
from an external battery or power
supply
