Retrotec DM-2A Manual de usuario descargar pdf (Pagina 41)

Page 41 of 66

©Retrotec Inc. 2012

5.6 Using the DM-2 to look for the locations of Leaks

If your test does not comply (e.g. the retention time is less than what is required) with the Standard

you are testing against (e.g. NFPA 2001), you need to search where the leakage locations are in the

enclosure, seal up the leakages, and run the Enclosure Integrity Test again.

The following instructions describe how to measure the total leakage area of the enclosure while

sealing up leaks to pass the Enclosure Integrity Test:

1. If you are not already in Set Pressure mode (for example, you used Method 2 to achieve your

target pressure) then press [Set Pressure] and input the current target pressure.

2. Press [Mode] until “EqLA” appears on the display beside the Mode label on the DM-2.

(Enable EqLA in the Mode Setup if EqLA does not appear after cycling through [Mode])

3. If the units for EqLA indicate ft

or in

“@ 50Pa”, then press [@Pressure] until the @ qualifier

disappears. The DM-2 now displays the total leakage area of the enclosure.

4. If the displayed leakage is small, and the units for EqLA are in “ft

” you might want to switch the

units to “in

” in the Setup menu. If the leakage is large and you are in “in

”, you might want to

switch the units to “ft

”.)

5. Search for, locate, and temporarily seal holes in the enclosure. You will hear the fan slow down

(less flow is required to achieve the target pressure when the room is tighter).

6. The “retention” tab in Retrotec’s CA2001 software indicates the “Maximum AllowableELA”. If

the EqLA reading on the DM-2 is greater than what is the “Maximum Allowable ELA” on

CleanAgent 2001, you must continue sealing leaks in order to get the EqLA reading on the

gauge to be less than what is the “Maximum Allowable ELA” is specified for your test on

CleanAgent 2001.

7. When the EqLA reading on the DM-2 is less than the “Maximum Allowable ELA” on the

CleanAgent 2001, you have passed the Enclosure Integrity Test. (According to NFPA 2001, this

translates to what the Maximum Allowable ELA should be to have a retention time of at least

10 minutes)

1 2 ... 36 37 38 39 40 41 42 43 44 45 46 ... 65 66

Sin comentarios

Retrotec DM-2A Manual de usuario Pagina 41