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DM-2 Digital Gauges : Using a DM-2 for a Clean Agent Enclosure Test

Tubing and Equipment Setup

  1. Set up the hard-panel system in the doorway.
  2. Before inserting the fan, insert the red tube through one of the holes in the hard panel and throw it away from the flow-stream of the fan.
  3. Insert the Fan into the hole in the hard-panel system and use the Fan-safety strap to secure it to the panel.
  4. Connect the Drive Umbilical to the Fan (power connector and yellow flow-pressure tube)
  5. Connect the Control Umbilical between the DM-2A and the Drive (yellow flow-pressure tube, yellow control-cable and red room-pressure tube).
  6. Plug mains-power into the 3300 drive.

How to connect your DM-2 to conduct a clean agent test.

Configuring the DM-2A Setup

  1. Press the [Setup] button on the DM-2 to enter the Setup menu
  2. Configure the Units for each mode as follows
    1. Pressure Pa
    2. Flow Off
    3. EfLA Off
    4. EqLA Off
    5. Air Changes Off
    6. Flow per Area Off
    7. EqLA per Area Off
    8. Velocity Off
    9. Velocity Flow Off
  3. Press [Exit] to exit the Setup mode
  4. Press the [Mode] button until the screen shows PrA and PrB
  5. (optional) Press the [Device] button until the correct device is shown in the bottom right corner
    1. If you have 2000 series fan select the Retrotec 2000 device
    2. If you have a 3000 series high powered fan select the Retrotec 3200 device
  6. (optional) Press the [Range] button until the correct range is indicated (bottom left corner)
  7. Press the [Auto Zero] button until Auto Zero is On (“Zero” in top left corner of screen)
  8. Press [Time Avg] button until Time Averaging is 1s, 2s, or 4s (depending on user preference)
  9. Baseline should always be Off

Conducting an NFPA 2001 test

  1. Enter all building and Clean Agent data into CA2001 software on the Building/Room and the Agent/Test tabs.
  2. Place the fan-cover over fan.
  3. Read “Static Pressure During the Door Fan Test” from PrA on the DM-2
  4. Enter “Static Pressure During the Door Fan Test” into CA2001 on the Total Leaks tab.
  5. Remove the fan-cover from the fan
  6. Use smoke to determine the direction of the static pressure and enter this into CA2001
  7. Read the required test pressure from CA2001
  8. Instruct the DM-2 to control the fan to achieve the required test pressure.
    For example, if the required test pressure for the current test direction is 16Pa to 18Pa, then press the [Set Pressure] button the DM-2 and enter [1]7[Enter] to have the DM-2 control the fan to 17Pa (between 16 and 18).
  9. Wait for the Room Pressure (PrA) to stabilize at the target pressure and then record the room pressure and the flow pressure (PrA and PrB) onto your Integrity Test Form and into CA2001.
  10. Press [Exit] to shut the fan down
  11. Turn the fan around (if you are conducting a test in both directions)
  12. Record the Target Test Pressure for the 2nd direction from CA2001 and repeat steps 8, 9, and 10 above.