Flow Meter Calibration Procedure - Process Technology Lufran LUF Series Manual

Engineering Information (Continued):

Flow Meter Calibration Procedure:

This calibration procedure has been performed at the factory prior to shipment. Flow meter calibration is
only needed if the flow meter is replaced.
1) Turn off heater operation by pressing the HEAT ON/OFF button on the MAIN MENU. Access the
FLOW CALIBRATION display.
2) Establish the highest operating flow rate through the heater.
3) Open the rear cabinet door on the unit and record the flow rate displayed on the flow meter. Press the
HIGH FLOW value and using the keypad change the value to match the display on the flow meter.
4) Observe the value displayed in the RAW DATA field. Press the HIGH RAW field and using the
keypad enter the number displayed in the RAW DATA field.
5) Establish the lowest operating flow rate through the heater.
6) Go to the back of the unit and record the flow rate displayed on the flow meter. Press the LOW FLOW
value and using the keypad change the value to match the display on the flow meter.
7) Observe the value displayed in the RAW DATA field. Press the LOW RAW field and using the keypad
enter the number displayed in the RAW DATA field.
8) Observe the value displayed in the SLOPE CALC field. Press the SLOPE field and using the keypad
enter the number displayed in the SLOPE CALC field.
9) Observe the value displayed in the OFFSET CALC field. Press the OFFSET field and using the
keypad enter the number displayed in the OFFSET CALC field.
10) Observe the value displayed in the FLOW CALC field. This value should now match the value
displayed on the flow meter.
11) Close the rear cabinet door. Press BACK to return to the secure menu.
M-43-25
Revision - Date 03-01-04-18
Figure 19: Flow Calibration Menu
29
LUF-Series Lufran Manual
Standard outlet, Standard Interface