If the pressure being measured exceeds the
meter’s design range the display will show
OR
for “over-range”
When taking draft readings at very low
pressure or draft levels, for maximum
accuracy, re-zero the meter in the orientation
that it is being used. This eliminated gravity
effects on the very sensitive pressure
transducer. It is also recommend that the
meter is switched on for at least five minutes
and then re-zeroed before taking such
sensitive measurements.
If the pressure being measured exceeds the
meter’s design range the display will show
OR
for “over-range”
When taking draft readings at very low
pressure or draft levels, for maximum
accuracy, re-zero the meter in the orientation
that it is being used. This eliminated gravity
effects on the very sensitive pressure
transducer. It is also recommend that the
meter is switched on for at least five minutes
and then re-zeroed before taking such
sensitive measurements.