CHL flow was low (to 8 g/s) due to propblem of a "pressure transducer" at CHL. He-4 target vents. Cell pressure reduced to 12 psi (fill pressure). Called for a controlled access. Dave Meekins is on the way down to the hall. target was warmed to 8.6 K. CHL flow was recovered soon, cell temperature goes to 6K again.