3. Hardware Description 39
• Provide adequate heat dissipation by mounting the camera on a wide thermally conductive sur-
face that can act as heatsink and use a fan in order to provide forced air ow over the camera.
• Grant enough air circulation between camera and other system components, especially hot ones.
• Do not cover the camera case with thermally insulant materials like plastics lms or cases.
3.6.5 Monitoring internal temperature
During continuous acquisition, NECTA temperature keeps rising until a steady temperature state is
reached. NECTA provides internal temperature reading through an integrated sensor. Depending on
the airow, the internal temperature may be 10 °C to 20 °C higher than the housing. Continuous mon-
itoring of the internal temperature is recommended to guarantee that camera is performing correctly.
Actions must be taken if the internal temperature rises above 70 °C. Refer to Section 9.3.1 to know
more about reading main board temperature using the NECTA viewer. Moreover, you can implement
temperature monitoring by yourself using the following code:
Example Code 3.1 | Temperature Monitoring
// Read the current temperature
float temp = device.Temperature;
// Retrieve the temperature measurement unit
UnitInfo unit = device.GetFeatureUnitInfo(Feature.Temperature);
MessageBox.Show(String.Format("Temperature: {0} {1}", temp, unit.Unit.ToString()));
3.6.6 Automatic internal temperature safety mechanism
An automatic temperaturemonitoring mechanism, shown in Figure 3.11, has been implemented in NECTA
cameras. The current temperature status can be retrieved reading the OverTemperatureStatus
property. Three statuses are dened:
• Normal: Temperature is below 70 °C. The camera is working within the safe operation area and
standard functionality is guaranteed.
• Warning: Temperature exceeded 70 °C. The camera is still able to acquire images but the temper-
ature is very high and near to the upper operating limit. Working in this limit condition is denitely
not recommended. To return in Normal status the camera temperature must fall below 65 °C.
• Fault: Temperature exceeded the 80 °C operative limit and the image acquisition was suspended
to reduce the temperature below the fault threshold. The acquisition can be resumed only when
the temperature is less than 75 °C.
Software temperature monitoring thread may be activated using OverTemperatureMonitorEnable
property. Whenthe temperature monitoring thread is active, the OverTemperatureStatusChanged
event is red every time the OverTemperatureStatus changes. The following code shows how to
register on the event and activate the thread:
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