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Goals and Symptoms
On support website to upgrade the firmware of the ION7700 meter, it mentions that older cards should be upgraded through COM 2. This is a bit confusing as it is unclear what is meant by the term "older" in this context.
Facts and Changes
Firmware upgrade old
Causes and Fixes
If the firmware version on the 7700 meter is older than V135 the upgrade should be done using the COM2. Anything after 7700 should be OK to upgrade using either COM port.
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