Here is a starting point even though you know which model you have, posted by Catherine a little while ago. Cathering may be able to add more for your reply, I find doing a google on your model comes up with heaps of answers, this is the first of many available.
Hope it helps! I simply googled Atlas MK7A2
Welcome to the Community.
@BWSS has already provided a great link - Thanks!
The meter you have installed 'MK7A2' is an one phase, two element meter - and your meter should have the below registers to scroll through:
|LCD||Description As Per Configuration|
|01*||Standard Current Date and Time|
|03*||Net Export Wh Total|
|13*||Net Import Wh Total|
|07*||Export Wh Load (Gross Solar in case of PFIT)|
|43||Import Wh - Controlled Load|
|53||Export Wh Total - General Light and Power|
|63||Import Wh Total - General Light and Power|
I will follow up with our Digital Meter Team and see if there is a printed instructed booklet. Will let you know once I have the answer.