NuAire LabGard NU-640-400, Руководство по эксплуатации и обслуживанию

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OM0291 Page 38 of 56
Rev 3 November2020
7.5.3.1 Downflow Calibration
Step 1: Place a velometer in the cabinet workzone on the horizontal plane 4 inches (102mm) above the
bottom edge of the viewing window. Spot check several points on the recommended downflow
velocity test grid in table 7.0
Step 2: If necessary, enter active blower speed adjustment.
• Press and hold key, then press hidden – blower - ↑ keys sequentially.
LED indicator above blower (green) key will blink fast.
Step 3: Press ↑ or ↓ keys to adjust blower speed.
• LED segments will indicate blower speed percentage and active blower speed adjustment
o Right end red LED indicates active blower speed adjust
The red LED will blink as soon as any adjustments are made and will continue to blink as the
motor rpm settles. Once the red LED stops blinking, the motor will run steady state at the
new percentage.
Note: The red LED must be non-blinking to save or exit
o Green LED’s indicate percentage on of scale (0-100%)
o Yellow LED’s indicate minimum (left/maximum (right) blower speed has been achieved
Note: At any time during the process
•
Press hidden key to accept and enter the blower speed calibration point (confirmed with 3 audible
beeps).
(If the blower speed calibration point was not successfully entered with the 3 audible beeps. The
calibration process must then be repeated for successful entry of blower speed calibration point.)
• Press key to abort and exit
Step 4: Proceed to inflow calibration leaving in active blower speed adjustment
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