Before fueling was to begin early Wednesday, technicians discovered that a pump that chills one of the shuttle's three electricity-generating cells was giving an erratic reading.

The cell had shown erratic readings before launching, but the Columbia was cleared to fly.

Other restrictions include a precipitation free environment, as the laser can produce erratic readings from airborne moisture or smoke.

I'm receiving erratic readings on the phenomenon, sir.

Captain," said Ensign Campbell as Janeway entered the transporter room, "We've been having some erratic readings.

Torque on a load cell causes erratic readings.

I'm getting erratic readings from the cerebral cortex; I can't make head nor tail of them.

One of the sensors, which also had been troublesome before the previous flight, had shown erratic readings.

It is possible to have interference from glycol, methanol, and damage from hydrogen sulfide which can result in erratic readings.

Moving in and out of the grooves, the caliper will give erratic or periodically varying readings.