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System Self-test (CIC)
Stand-alone, remote-controlled measurement stations are usually employed for long-term level monitoring. Over time, in reality, damage to the monitoring microphone, such as from vandalism, storm damage or animal attacks, can occur.
Thanks to the System Self-test (Charge Injection Check – CIC) in the new M2340 microphone, the proper functioning of the system can now be periodically remotely verified and documented.
Visualisation of the System Self-test (CIC)
An internal precision generator in the MA230 – this is the microphone preamplifier in the M2340 – produces two square-wave signals with the fundamental frequencies 46.9 Hz and 375 Hz. Including the harmonics of these square-wave signals, the test signal covers the entire spectrum up to 20 kHz. The generator is controlled via the ASD (Automatic Sensor Detection) data link to the microphone.
The test signal is capacitively coupled to the input of the MA230 preamplifier and attenuated by the capacitance of the microphone capsule. Before starting the measurement series, the reference spectral levels are recorded so that later measurements can be compared with this reference. If a capsule is damaged, its capacitance changes, which consequently leads to a change in the microphone signal level. This signal now passes through the preamplifier, the connecting cable and the input stage of the measurement instrument, where it is digitized and evaluated.
With the Remote Measurement interface, the XL2 makes available all commands to control the M2340 and to query the measured values, while the monitoring system – e.g. NoiseScout – takes care of the recording of the reference spectrum, the regular verification and the alarming in case of a significant level change or error.
Low-noise circuitry has a low impedance and therefore consumes more power. Therefore, a good compromise between power consumption and low noise is always sought, and this has been achieved very well in the new M2340: compared to the M2230, the current consumption has been reduced by 66% to 0.8 mA. The noise floor increases by only 1 dB, while the maximum processable sound pressure level has been increased by 1 dB. This makes the M2340 most suitable for power-saving applications such as long-term measurement stations.
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Orders placed though the Amber Technology website are despatched from our Sydney warehouse. Orders placed before 1.00pm Sydney time (for items in stock) will generally be shipped on the same day.
We ship using Startrack Express. We deliver Australia-wide to residential, business and PO box addresses.
Shipping is free for all orders over $275 including GST (effective 1 March 2018). There is a $22 (including GST) shipping and handling charge for all orders under $275 including GST.
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Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
All items purchased from Amber Technology will be covered under warranty. The duration and terms of this warranty are specified by the manufacturer unless otherwise stated. Warranty information is available on the individual product listings on this site.
Refurbished items will include a 12 month warranty unless otherwise stated.Please contact us if you have received an item which has been damaged in transit or is otherwise not working correctly when you receive it. Subject to availability, we will arrange for a replacement item to be despatched and for the faulty item to be returned to us.
Amber Technology maintains a nation-wide network of carefully selected Authorised Service Agents to ensure that you are never far from convenient, expert technical and service support. If your item develops a problem and requires servicing under warranty, please contact your local Authorised Service Agent.
The availability of stock is communicated via the indicator of each product listing page. "Available" means that reasonable stock is in our warehouse, ready for immediate shipment. "Limited Stock" means that we have only a small number of items in stock. "Out of Stock" means this item is currently unavailable for immediate shipment - orders placed for ‘Out of Stock’ items will be fulfilled as soon as replacement stock arrives.
"Special Order” items are products that are not generally kept in stock in Australia. Lead times for Special Order items vary depending on country of origin, manufacturer’s stock levels, factory production schedules and/or incoming shipment transit times. Please contact us for an estimate as to the likely lead time. Please note that finalized sales for special order items cannot be cancelled.
If refurbished stock is available, this will be shown on the summary page for the product. If a product listing only allows you to choose refurbished stock, we are not holding new stock and we can no longer obtain new stock.
Refurbished items are always in perfect working order and will include all accessories. Refurbished items are may
Refurbished items include a 12-Month warranty unless otherwise stated.
Please visit the Get Support page to find a service agent, log a service ticket, or ask a technical question about your product.
Please contact us if you have received an item which has been damaged in transit or is otherwise not working correctly when you receive it. Subject to availability, we will arrange for a replacement item to be despatched and for the faulty item to be returned to us.