Dwyer UXF3 - Manual (Page 52)

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4.9.3. Setting the DO output
Description
z Selects the output of total pulses and statuses (of alarm, flow switch, total switch, etc.).
z Settable range (common to DO1, DO2 and DO3)
NOT USED : Does not use the contact output.
+TOTAL PULSE : Outputs the forward total pulses.
-TOTAL PULSE : Outputs total pulse in reverse direction.
FULL SCALE 2 : Selects a contact output as FULL SCALE 2 measurement status.
(forward automatic 2 ranges, forward and reverse range, forward/reverse automatic 2 ranges)
ALARM
ALL : Selects a contact output at HARDWARE FAULT or PROCESS ERROR status.
HARDWARE FAULT : Selects a contact output when circuit error such as memory occurred.
PROCESS ERROR : Selects a contact output when no waves are received, or waves are unstable.
FLOW SWITCH
FLOW SW HIGH : Selects a contact output when flow rate is above the setting.
FLOW SW LOW : Selects a contact output when flow rate is below the setting.
TOTAL SWITCH : Selects a contact output when total value exceeds the setting.
AO RANGE OVER : Selects a contact output when the lower and upper limits of range are above the setting.
PULSE RANGE OVER : Selects a contact output when the total pulse output exceeds the maximum output frequency.
-FLOW DIRECTION
: Selects a contact output when the flow is in reverse direction.
CONTACT ACTION
ACTIVE ON : Normally off (DO1/DO2) or normal open (DO3).
ACTIVE OFF : Normally on (DO1/DO2) or normal close (DO3).
z If the contact action is set to “ACTIVE OFF”, DO output is provided when the power is turned on.
z Check if DO output can be modified before setting.
DO output specifications
DO1/DO2 : Open collector, Contact capacity 30V DC, 0.1A
When total pulse output is selected (Note: See 4.9.2.1)
100 pulses/s or less (at full scale flow rate)
Pulse width: 5, 10, 50, 100 or 200ms.
DO3 : Relay contact, Contact capacity 220V AC/30V DC, 1A
Service life 200,000 times (under rated load), Can be replaced if provided with a socket. (See 6.4. How to
replace the relay)
When total pulse output is selected (Note: See 4.9.2.1)
1 pulse/s or less (at full scale flow rate)
Pulse width: 50, 100 or 200ms.
For actual keying, refer to the typical operation indicated below. Set the parameter protection to OFF beforehand. (See Section 4.4.1.)
4.9.3.1. How to validate the total pulse output
Description
z Validates the total pulse output for DO1 OUT, DO2 OUT and/or DO3 OUT.
+TOTAL PULSE : Outputs flow rate total pulse in forward direction.
-TOTAL PULSE : Reverse flow rate total pulse output.
Note) Referring to Section 4.9.2.1., set the pulse value, pulse width, etc.
For concrete keying, refer to the typical operation indicated below. Set the parameter protection to OFF beforehand. (See Section 4.4.1.)
Operation
(example) Set the DO1 output to “+ TOTAL PULSE”.
Also, set the contact to “ACTIVE ON”.
Key operation Description Display
ź
Press the key twice to display “OUTPUT SETTING”.
OUTPUT SETTING
ENT
ź
Press the ENT key once to display “ZERO ADJUSTMENT”.
ZERO ADJUSTMENT
SET ZERO
ź
Press the key 6 times to display “DO1 OUT”.
* Press the key again to display “DO2 OUT”.
* Press the key once again to display “DO3 OUT”.
DO1 OUT
NOT USED
ENT
ź
Press the ENT key once to blink the cursor.
DO1 OUT
NOT USED
CAUTION
Bulletin F-107-UXF3