TSI Instruments FHC50, Operation And Service Manual

Page: 61 / 107

Technical Section 53
High Flow Calibration
1. Enter CALIBRATION FLOW menu and raise the sash height to approximately 18 inches
(sash stop).
2. Select FLO STA HI CAL to enter a submenu with the following items:
FLO STA LO SETPT
Damper position for low flow calibration
PRESS ZERO VOLTAGE Voltage from pressure transducer during Flow Station
Pressure Transducer Zero
PRESSURE VOLTAGE Current voltage from pressure transducer
MEASURED FLOW Current flow rate
ENTER ACTUAL FLOW
Input actual flow as measured with reference instrument
here
3. With the FLO STA HI SETPT at 100% (default), observe the PRESSURE VOLTAGE
displayed on the screen, or use a voltmeter to read the voltage at the pressure signal
transducer input terminals 7-8 on the back of the controller.
4. Slowly decrease the FLO STA HI SETPT percentage value to adjust the damper position
until the PRESSURE VOLTAGE (pressure transducer output) shows the first noticeable
decrease in voltage from the 100% position. A general rule of thumb is that the voltage
change should occur with the damper between approximately 70 to 90% open.
NOTE: Adjusting the FLO STA HI SETPT with the quick keys allows the
PRESSURE VOLTAGE to be displayed in real time.
5. For reference only, the MEASURED FLOW item will display the default measured flow
based on the current settings of the flow station (duct area, etc.).
6. Determine the actual flow with a duct traverse.
7. Enter the actual flow measurement under the ENTER ACTUAL FLOW menu item
8. Press the ENTER (

) soft key to save the flow data.
9. The high flow calibration is complete. Exit the menu with the ESC key.
NOTE : Use BALANCE MODE to verify flow station calibration.
Linear 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 linear flow station location.
3. Set FLO STA TOP VEL to match the range of the linear flow station used.
4. Set FLO STA FS V to match the voltage output (0 to 10V or 0 to 5V) of the linear flow
station used.
5. Linear flow station calibration should be complete. Exit the menu.
NOTE : Use BALANCE MODE to verify flow station calibration.