4. MEASURING
Make sure you do not exceed the meter’s operating specifications.
Do not exceed the meter’s internal temperature operating range
Do not put the meter on a hot surface
When taking critical draft measurements always re-zero the meter in the position you
are taking the readings and hold the meter still during the test.
Differential Port Port 1
IR Printer Output
Always use the top right hand port (Port 1) for taking single channel
measurements (pressure or vacuum).
Only use the left hand port for differential
measurements.
If the pressure being measured exceeds the meter’s design range the display will
show ----
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 recommended
that the meter is switched on for at least five minutes and then re-zeroed before
taking such sensitive measurements.