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Section 3 - Main Operation
The HHF1000 transmitter has a built-in LCD backlit display and keypad. Using
the display and keypad, you can view the following parameters:
• The air velocity & air temperature in real time (Main Display)
• Maximum air velocity & temperature during the session
• Minimum air velocity & temperature during the session
• Volume air flow in Cubic feet per minute (CFM) or Cubic meter per
minute (CMM)
You can view and set the following parameters from the keypad:
• High Alarm set point for air velocity
• Low Alarm set point for air velocity
• Display’s response time
• Cross sectional area of the air flow duct
• Atmospheric pressure setting in millimeter of Mercury (mmHg).
• Setting the Auto Power shut off feature to ON or OFF.
If the unit has wireless PC communication capability, you can view and set the
following parameters:
• Turn the Wireless Radio on or off.
• View the data transmission interval in seconds. You can change this
parameter from the End Device Configuration software.
• View the unit ID address. You can change this parameter from the End
Device Configuration software.
The wireless version communicates with the UWTC-REC1 wireless receiver. You
can transmit air velocity and air temperature data to the UWTC-REC1 and be
able to display and graph data on the TC central software application.
Changing Display Engineering Units
- You can change the air velocity
Engineering unit display from Feet per minute (FPM) to meter per second (m/s),
miles per hour (MPH), and kilometers per hour (Km/h) from the keypad (Press
SET key). You can change the Temperature display from ºF to ºC or vise versa by
pressing the Down key.
Turn On Display Backlight
- You can turn the LCD backlight on or off by
pressing the UP key. The backlight will turn off after 10 seconds if the UP key is
not pressed again.
High & Low Alarm Set Points
- You can set and enable the high & low alarm set
points for the air velocity as shown in the keypad flow chart. When in the alarm
condition, the HAL or LAL icon will flash on the LCD.
Display Volume Air Flow
- The unit calculates volume air flow by multiplying
the air velocity by the cross sectional area of the pipe or the duct. The cross
sectional area can be set in the display menu as shown in the keypad flow chart
in square inches units. The volume air flow is shown in Cubic feet per minute or
Cubic meter per minute when air temperature is displayed in Degrees C.
Auto Power Shutoff
– You can turn on the auto power shutoff feature (Default
is ON) to save battery life. If no keys are pressed for 5 minutes, the unit will shut
down to save battery life. Pressing any key will turn the unit back on.
3-1
Main Operation
3