I'm a professional chimney sweep and stove installer so have the conversation most days with folk about the importance of ONLY burning seasoned wood.
I'm afraid the truth is that 90% of moisture meters available are very inaccurate, some by as much as 25%. You need to spend upwards of £100 before you will get anything accurate enough to be worth using.
The best thing you can do is chop, split, stack somewhere airy and dry and wait a year, two or three would be even better. At that point they will be in a very good state to burn and you don't need to test them with a moisture meter.
Many people simply don't realise how damaging and dangerous it is to burn damp unseasoned wood.