14 Give it the document and tell it to work from it

What people usually ask

How do I do a two point calibration on a <brand> conductivity meter?

What comes back

A plausible procedure with menu names and key labels that belong to no real meter, or to a different model from the same maker.

Ask this instead

Attached are the user manual for my conductivity meter and a photo of its nameplate. First read the model number on the nameplate and confirm the manual covers that exact model. If it does not, stop and tell me.
Then give me the two point calibration procedure from the manual only. One step per line, the page and section number at the end of each line, the manual's own names for menus and keys.
Where the manual gives no step at a point where you think one is needed, write "not in the manual" in that place and leave it empty.
When I ask this again without the manual attached, find the manual for this exact model number first, tell me where you found it, and answer from it the same way.

Attach: The manual PDF and a photo of the nameplate.

Why it works: With the manual in front of it, every step has a page to point to, and a missing step shows as a gap.