TSI Instruments FHC50 User Manual

Technical Section
51
5. Controller will prompt “Lower sash to 12 inches height then press .” Lower the sash(es)
to the 12-inch height, so the fume hood bypass (if present) is just covered, and press the
 key.
a. The FHC50 controller will display the following items:
Desired Flow
Flow set point to achieve desired face velocity
Show Sash % Open
Readout of current sash % open
Actual Flow
Readout of current measured flow
Save & Continue
Use to save data point
Set flow for
Desired face velocity
b. Perform a face velocity traverse using a thermal anemometer. Compare the face velocity
traverse reading to the face velocity set point.
c. Adjust the Desired Flow to change the flow control set point for the 24-inch sash position
until actual face velocity matches the Set flow for set point.
d. Repeat steps b. and c. as needed before selecting Save & Continue to save the sash
mid-point calibration.
6. Controller will prompt “Lower sash to 2 inches height then press .” Lower the sash(es) to
the 2-inch height, so the sash(es) are nearly closed, and press the  key.
a. The FHC50 controller will display the following items:
b. Perform a face velocity traverse using a thermal anemometer. Compare the face velocity
traverse reading to the face velocity set point.
Desired Flow
Flow set point to achieve desired face velocity
Show Sash % Open
Readout of current sash % open
Actual Flow
Readout of current measured flow
Save & Continue
Use to save data point
Set flow for
Desired face velocity
c. Adjust the Desired Flow to change the flow control set point for the 24-inch sash position
until actual face velocity matches the Set flow for set point.
d. Repeat steps b. and c. as needed before selecting Save & Continue to save the sash
closed calibration.
7. Controller will display “Sash position vs. flow is done calibrating. Press .” Press the
 key to save calibration and continue.
Flow Calibration
Flow can be measured using a Pressure Flow Station, Linear Flow Station, LOM Venturi, 6-Pt
Venturi, or Calculated from face velocity and open sash area.
Pressure Flow Station Calibration
NOTE: Flow stations are optional and may not be installed in your system.
1. Enter CALIBRATE FLOW item.
2. Set FLO STA AREA to the duct area at the flow station location.
3. Set FLO STA PRESS FS to match the range of the pressure transducer used.

TSI Instruments FHC50 Specifications

General

Brand	TSI Instruments
Model	FHC50
Category	Controller
Language	English