Not sure the mfg or model of the sound meter that AMP is required to use, you might check with AMP at the event. Based on limited experience not aware their meter is at any significant difference than several meters that people have used. AMP is required to use a “fast” read setting on the meter not a slow or average setting. Past attempts to try to get sound readings with other club’s event organizers have been met with mixed results as they are not prepared or want to deal with an outsider to the event, would strongly suggest if anyone is wanting to attend another organization’s event solely for a sound testing would be to reach out prior to the event and ask permission vs simply showing up.