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2 General Description
Ngara is a Class 1 instrument (IEC 61672.3:2006), consisting of the following components –
• Weather proof case
• 12V DC Battery
• Ngara Instrument
• Microphone & Pre-Amplifier
2.1 Weather Proof Case
Ngara is housed in a rugged weatherproof case. To open the case, unclip the two latches at the front of the case.
When closing the weatherproof case, ensure the microphone lead is carefully guided through the cut out provided.
To attach the microphone post, simply screw the base of the post into the mounting found on the lid. On the outside
of each latch, a reinforced hole is provided to allow for security measures such as padlocks and chains.
Failure to carefully guide the cable through the cut out provided will cause irreparable internal damage
to the microphone cable.
2.2 12V DC Battery
Ngara can be configured to operate using two different sized batteries. The configurable battery sizes include –
• 24Ahr – Allows for up to a maximum of 2 weeks of continual CSV data only logging, and up to 1 week worth
of CSV and WAV file data recording.
• 12Ahr – Allows for up to a maximum of 1 week of continual CSV data only logging
The above figures are a guide only and assume -
• The use of a fully charged battery
• There is enough available disk space
Current battery status can be viewed using the LCD or the Remote Host application.
Battery discharge rate is not linear. Battery voltage will drop faster as the stored capacity decreases.
2.3 Ngara
The electronics can be housed within either a Silver (V1) or Black (V2) aluminium enclosure. The unit is classified
as per Group X for susceptibility to radio frequency fields and has been tested to AS/NZS CISPR 22, and is approved
for connection to any network.
There are no user serviceable parts inside the enclosure.
The electronic circuitry contains many calibration settings that are essential for Ngara to operate correctly.
Opening the enclosure will void the unit's calibration and warranty.
Version — 25-7cd7566
Ngara
User Manual
Page — 9 of 80
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