Dwyer UXF2 - Manual (Page 48)

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3.10. How to calibrate zero
Completely close the valves upstream and downstream of the flow meter before calibrating zero.
Notes
1. If there is no valve or if the fluid flow cannot be stopped, select "CLEAR" when "ZERO ADJUST". In this
case, the zero point may slightly be off and manual zero point cannot be set.
2. If parameters are set at "PROTECTION ON", select "PROTECTION OFF" beforehand.
3. SET ZERO: Saves the current flow status as zero. CLEAR: Sets the calibration value for zero point to "0".
The following is the zero point adjustment procedure from measurement mode.
Keying LCD indication/comment
key pressed twice. 1st line: [OUTPUT SETUP]
ENT key pressed. 1st line: [ZERO ADJUST]. 2nd line: [CLEAR]. * As selected currently.
ENT key pressed. 2nd line blinks.
key pressed. 2nd line: [SET ZERO].
ENT key pressed to register.
On 2nd line about 1 sec, [**COMPLETE**] is displayed, and zero calibration is
performed (Note 4).
ESC key pressed. 1st line: [OUTPUT SETUP]
key pressed 3 times. Measurement mode is resumed.
Note: 4. If [CLEAR] has been selected and executed at this time, any saved manual zero calibration
value will be cleared.
BULLETIN F-70