Erratic readings can be caused by a poor connection, damaged cable, moisture in the unit, or a damaged sensor. In most cases, erratic readings are due to moisture getting into the system. First check the connection. Look for moisture between contacts or a loose or broken wire. Next, check the cable for cracking or fraying. If the connections and cable appear okay, but the readings are still erratic, the sensor may be damaged. Contact INW/Seametrics for evaluation and repair.
Erratic and erroneous readings can also occur due to improper grounding. See the Grounding Issues application note.