Dwyer UXF2 - Manual (Page 79)

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4.5.7.5. How to validate the flow switch
Description
z
Select a contact output as DO1 and/or DO2 when the flow rate has exceeded a set value.
Flow rate For UPPER SWITCH
Time
Hysteresis
ON or OFF
Flow rate For LOWER SWITCH
Time
ON or OFF
Hysteresis
z Settable ranges
Flow rate
: 0 to 10 m/s in terms of flow velocity.
Action : UPPER SWITCH or LOWER SWITCH.
Contact action : ACTIVE ON ... DO1 normally OFF, DO2 normally open.
ACTIVE OFF ... DO1 normally ON, DO2 normally closed.
Note: The hysteresis value set in Section 4.5.5 "Setting the flow rate and flow velocity range” is applied to the
switch action range.
For actual keying, refer to the typical operation indicated below. Set the parameter protection to OFF beforehand
(Section 4.4.1).
Typical operation Set the DO1 output to "UPPER SWITCH", and upper limit flow rate to 12 [m 3 /h]. Also, set the
contact to Normally OFF.
Keying order Description Indication
ź
Pressed twice to select the "OUTPUT SETUP" mode. OUTPUT SETUP
ENT
ź
Pressed to indicate "ZERO ADJUST". ZERO ADJUST
CLEAR
ź
Pressed 5 times to indicate "DO1 OUT".
* Pressing key again will select "DO2".
DO1 OUT
NOT USED
ENT
ź
Pressed to blink the cursor. DO1 OUT
NOT USED
ź
Pressed 5 times to select "FLOW SWITCH" on 2nd line. DO1 OUT
FLOW SWITCH
ENT
ź
Pressed to indicate the flow rate setting screen for the
"UPPER SWITCH".
* Pressing key will select the flow rate setting
screen for the "LOWER SWITCH".
UPPER SWITCH
10.0000 m3/h
ENT
ź
Pressed to blink the cursor. UPPER SWITCH
0 010.0000 m3/h
ź
Pressed 3 times to move the cursor. UPPER SWITCH
001
0 .0000 m3/h
BULLETIN F-70