Retrotec DM-2A Manual de usuario descargar pdf (Pagina 5)

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©Retrotec Inc. 2012

List of Tables

Table 1. DM-2 Gauge keys and functions. ................................................................................................................................. 13

Table 2. Possible results and selectable units for the DM-2 gauge. .......................................................................................... 17

Table 3. Example values displayed using each of the three significant figure options. ............................................................. 33

Table 4. List of compatible devices to be used with the DM-2. ................................................................................................. 33

Table 5. DM-2 compatible devices and associated Flow Range configurations. ....................................................................... 36

Table 6. Default mode set-up. ................................................................................................................................................... 37

Table 7. Firmware changes from versions prior to 2.29 to the current version 3.01. ............................................................... 54

Table 8. N and K coefficients for all DM-2 supported fans. ....................................................................................................... 55

Table 9. N and K coefficients for all DM-2 supported fans, Obsolete. ....................................................................................... 57

Table 10. Factors for when a building pressure of 50 Pa cannot be reached (“n” value of 0.65). ............................................ 58

Table 11. Factors for when a building pressure of 25 Pa cannot be reached (“n” value of 0.6). .............................................. 59

Table 12. Temperature correction factors for enclosure depressurization. .............................................................................. 60

Table 13. Temperature correction factors for enclosure pressurization. .................................................................................. 61

Table 14. If the “n” value on the DM-2 is set to 0.65 and the building “n” is different, a small error, as shown in the table,

will result. .................................................................................................................................................................................. 62

Table 15. If the “n” value on the DM-2 is set to 0.60 and the building “n” is different, a small error, as shown in the table,

will result. .................................................................................................................................................................................. 62

List of Figures

Figure 1. Gauge displaying 249.5 Pa (or 1 in WC). ....................................................................................................................... 6

Figure 2. The gauge displays a negative pressure (-1 in WC, or -0.1 Pa) on the DM-2. ............................................................... 7

Figure 3. Digital and analog gauges display a pressure of 50.2 Pa (above); Retrotec’s magnahelic gauge system (right). ......... 8

Figure 4 Battery cage and four rechargeable batteries for the DM-2. ...................................................................................... 10

Figure 5. Splash screen and the main screen with battery life indication in the top left. ......................................................... 11

Figure 6. DM-2 back panel with pressure ports and electrical connections. ............................................................................. 12

Figure 7. Pressure ports of the DM-2 gauge. ............................................................................................................................. 24

Figure 8. Gauge field check configurations (cross-channel checks (top), cross-gauge checks (bottom)). ................................. 43

Figure 9. Fan Pressure check using a T-connection check. ........................................................................................................ 44

Figure 10. Syringe check setup .................................................................................................................................................. 44

Figure 11. The effect of a moving tube on pressure readings. ................................................................................................. 47

Figure 12. Errors in pressure reading from a pinched tube. ...................................................................................................... 49

Figure 13. Water in the reference tube (left); high fixed pressure due to water (right). .......................................................... 50

Figure 14. Wind-damping kits; basic (left) and deluxe (right).................................................................................................... 51

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