The whole duty of the Examiner is to note the TA, needle behavior of the PC.
This duty is done muzzled. No talk or chatter.
The pc comes in. The Examiner smiles, indicates for the pc to sit down.
The Examiner hands the pc the cans.
Notes the TA, needle and looks up at the pc for his statement.
When the pc says what he wants, the Examiner says "Thank you very much. " and indicates to the pc his F/N if he sees one.
And indicates with an arm gesture the way out. This is the whole drill.
Very rarely, the pc appears to be disturbed by the silence of the Examiner. They show this by restlessly shifting in the chair, or talking on and on, or trying to get the Examiner to talk. It is permissible for the Examiner to politely acknowledge the pc's origination. This acknowledgment will make the pc feel comfortable.
To do, say, anything else will invalidate the pc and/or loose the F/N he or she got in session. You don't, as an Examiner, care about anything except TA, needle behavior and indicating F/N if one is observed, statement, pc indicators. The pc will tell you what he wants to. You don't have to ask for it.
Stable Datum = Always indicate F/N when you observe one, whether an Examiner or Auditor.