On Dec 9, 8:46*am, Basil wrote:
I'm sure youve already checked it but low ASI readings are *often
caused by the triple probe being 1/4 inch short of fully home in the
socket.

And I never saw a triple probe with an insertion depth marker. I just
push mine in until it stops, which is soon after the tip enters the
last O ring.

One other trap with these triple probes is excessive grease. They
need to be lubricated to prevent O ring wear but I found that, if just
a bit too much grease is used, it can close off the D section holes.
After being bitten by this once I make a point to check they are clear
each time I insert the probe.

Andy