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2000 Fire Door-Fan Manual updated 2002-05-28 Page 48 of 58
For a complete calibration, take the gauge up to full scale, hold it there for 60
seconds, release the pressure and zero the gauge. Apply positive pressures to the
upper port and a negative pressure to the lower port such that changes in
atmospheric pressure will not affect the calibration. Record the reference and
gauge readings for each point on the table below. Ensure that all zero shift of the
reference gauge is removed for each reading.
The Ascending and Descending readings must be taken at the target pressures shown
+/-1 Pa if the pressure is below 20 Pa, +/-2 Pa if the pressure is below 50 Pa or +/-5
Pa if the pressure is above 50 Pa. That is to say the readings must be taken at these
target points within these limits; these limits do not describe the accuracy required.
60 Pa Analog Room gauge target pressures
Ascending pressure 0 10 14 17 25 35
Descending
pressure
50 35 25 17 14 10 0
Final pressure 8 12 15 20 30 40 55
250 Pa Analog Room gauge target pressures
Ascending pressure 0 30 40 60 90 130
Descending pressure 180 130 90 60 40 30 0
Final pressure 25 35 50 75 100 150 200
DM-1 Digital Room & Flow gauge target pressures
Ascending pressure 0 10 14 17 25 35
Descending pressure 320 35 25 17 14 10 0
Final pressure 8 12 15 20 30 40 350