Have lost username and password for 5100V/5180V Chart Recorder. Please advise how to create new account with nobody logged on.

Hi we have 5100V/5180V Chart Recorder. Previously this was setup by somebody who no longer works here. We have recently had a requirement to add a new channel to the CR. However we cannot access the configuration as nobody here knows the username or password. Is it possible to reset the security, without losing the existing CR configuration?
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