In a message dated 12/27/00 2:15:04 AM, kg6ch at gte_net writes: << Does anyone know what the symbol on the display means? >> Yes, the little e signifies an error (higher than the range) The maximum reading on these meters is 999 ppm. Lee Harper --------------- See http://www.aka.org/AKA/subkillietalk.html to unsubscribe