Obvius A89DC-08 - Manual (Page 8)

Temperature
The A89DC-08 may generate a fair amount of heat depending on the total current load being monitored. If the A89DC-08
is to be mounted in a sealed enclosure outdoors, care should be taken to ensure the device does not overheat. The heat
generated by the A89DC-08 is proportional to the total of load current being monitored. In situations where high load current
is to be monitored, and the ambient air temperature will be above room temperature, forced air cooling will be required. The
chart below shows this requirement.
When using the chart above, the total current being monitored on all 8 channels should be used averaged over a 1 minute
period. The chart assumes long term current levels at a steady state. Infrequent peaks lasting less than 30 seconds (such as
inrush current) should not be used for this calculation.
For example, if the power being monitored will be a maximum of 200Amps (total of all channels) and the ambient air
exceeds 50c, forced air cooling will be required.
To provide forced air cooling, A minimum of 10 CFM across the narrow width of the A89DC-08 is
required.
Note: Ambient Air temperature refers to the air immediately surrounding the A89DC-08. This is not
the outdoor air temperature. The enclosure that the A89DC-08 is mounted inside may retain some heat
and cause the ambient air temperature to be hotter than the surrounding outdoor air temperature.
Page 8 A89DC-08 – DC Current Monitor