Retrotec 5000 Blower Door with DM32 - Manual (Page 4)

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Perform a Blower Door test on a room and
record the EqLA at 50 Pa.
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Install cardboard in upper part of doorway with a
20 x 20 inch hole cut in it.
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Perform a second Blower Door test on the
building, record the EqLA at 50 Pa.
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Subtract the first result from the second result
and the value should be 400 sq. in. (+/-10%).
Speed control is handled automatically with FanTestic
software, for complete automation.
Control fan speed with software Field check system monthly
Alternatively, use a Retrotec Calibration Verifier.
Page 4 of 4
Field check gauge weekly
Check for gauge accuracy, blocked, leaking, or pinched
tubes weekly, and anytime results are in question.
Check the gauge with the tubes in the Umbilical.
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Set [Time Average] to 5 seconds in [Settings].
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Tap [Channel B] and select“Pressure: Pa”.
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Connect the red tube between the red and
yellow ports.
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Remove red tubes and repeat with the yellow tube
between the blue and green ports.
If readings on Channel A and Channel B are within
2% and don’t drop noticeably in 5 seconds, the
gauge is functioning correctly.
Check gauge and tubes
regularly to eliminate
the most common
source of errors.