My PM levels are staying on 1 and won’t change. Is that correct? Abraham Gomez April 03, 2020 00:35 Updated If everything is clean, a PM indication of 1 should be correct. Related articles My Halo didn’t update to the latest version. How can I update my firmware to the latest version? The Halo readings look a bit off. Are they accurate? Comments 0 comments Please sign in to leave a comment.