Retrotec DM-2A Manuel d'utilisateur télécharger pdf (Page 8)

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©Retrotec Inc. 2012

Analog Gauges

Retrotec no longer manufactures or sells analog gauges. It is recommended that Door Fan systems

using analog gauges be upgraded with a digital gauge.

Retrotec manufactured three types of analog gauges:

 A 60 Pa gauge, which displays two ranges, 0 Pa to 60 Pa and 20 Pa to 40 Pa

 A 250 Pa gauge

 A 500 Pa gauge

The E43 Door Fan system included an analog gauge clip which contains two 60 Pa Gauges and a 500 Pa

gauge as shown on the second image in Figure 3. All Retrotec Door Fan systems can be connected to an

analog gauge.

Reading the pressure on an analog gauge is simply a matter of determining where the needle is

pointing on the gauge. The needle indicates the pressure differential between the two pick-up points

on the gauge. Note that it's important to zero the gauge before use, as readings will be incorrect if the

gauge does not read zero before any tubes are attached.

Figure 3. Digital and analog gauges display a pressure of 50.2 Pa (above); Retrotec’s

magnahelic gauge system (right).

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Retrotec DM-2A Manuel d'utilisateur Page 8