Flowserve DRC-17 - Manual (Page 23)

WCAIM2058 DataFlo Digital Electronic Remote Controller DRC17 23
4.9.3 Calibration of Cycle Time
NOTE: This procedure should only be performed if the
clockwise and counterclockwise valve positions are
correctly calibrated. This procedure should also be
performed following any valve position calibration.
Press the or key until Cyc Time is displayed
alternating with the cycle time.
Press the ENT key to begin the automated cycle time
calibration procedure. The valve will move between the
clockwise and counterclockwise positions to measure the
valve travel time. When the valve movements have
completed, the cycle time will be computed and stored.
The display will then alternate Cyc Time with the
measured cycle time.
4.9.4 Calibration of 4-20 mA Setpoint Input
NOTE: This procedure applies only if the controller
circuitry is configured for a current setpoint.
Example: DRC17 – 4 – 4 – 120A
Press the or key until Setp Lo is displayed
alternating with its voltage value.
Press ENT to begin reading the voltage corresponding to
the setpoint input.
Adjust the setpoint input current to 4.0 mA. The voltage
with 4 mA applied should be less than 1 volt.
Press ENT to lock in the lower range setpoint voltage
value. The display will then alternate Setp Lo with its
voltage value.
Press the key once to display Setp Hi alternating with
its voltage value.
Press ENT to begin reading the voltage corresponding to
the setpoint input.
Adjust the setpoint input current to 20.0 mA. The voltage
with 20 mA applied should be between 3.800 and 5.000
volts.
Press ENT to lock in the upper range setpoint voltage
value. The display will then alternate Setp Hi with its
voltage value.
Both the upper and lower setpoint signal points are now
calibrated. Press
to return to the Run Mode.
4.9.5 Calibration of a Potentiometer Setpoint Input
NOTE: This procedure applies only if the controller
circuitry is configured for a potentiometer setpoint.
Example: DRC17 – K – 4 – 120A
Press the or key until Setp Lo is displayed
alternating with its voltage value.
Press ENT to begin reading the voltage corresponding to
the setpoint input.
Adjust the potentiometer to the lower range position. The
voltage reading should be less than 1 volt.
Press ENT to lock in the lower range setpoint voltage
value. The display will then alternate Setp Lo with its
voltage value.
Press the key once to display Setp Hi alternating with
its voltage value.
Press ENT to begin reading the voltage corresponding to
the setpoint input.
Adjust the potentiometer to the upper range position. The
voltage reading should be between 3.800 and 5.000 volts.
Press ENT to lock in the upper range setpoint voltage
value. The display will then alternate Setp Hi with its
voltage value.
The voltages for both the upper and lower range are now
calibrated. Press
to return to the Run Mode.
4.9.6 Calibration of an Analog (4-20 mA) Process Input
NOTE: This procedure applies only if an analog process
module configured for current input is used.
Example: DRC17 – 4 – 4 – 120A
Press the or key until Proc Lo is displayed
alternating with its voltage value.
Press ENT to begin reading the voltage corresponding to
the process input.
Cause the process transmitter to output a current
corresponding to the lower value of the process. The
current corresponding to the lower process value should
be between 3.9 mA and 4.1 mA. With a current of 4.0
mA, the voltage displayed should be less than 1 volt. It is
not critical that the current be exactly 4.0 mA; it is critical
that the process is exactly at the lower value.
Press ENT to lock in the lower range process voltage
value. The display will then alternate Proc Lo with its
voltage value.
Press the key once to display Proc Hi alternating with
its voltage value.
Press ENT to begin reading the voltage corresponding to
the process input.
Cause the process transmitter to output a current
corresponding to the upper value of the process. The
current corresponding to the upper process value should
be between 19.9 mA and 20.1 mA. With a current of 20.0
mA, the voltage displayed should be between 3.800 volts
and 5.000 volts. It is not critical that the current be
exactly 20.0 mA; it is critical that the process is exactly at
the upper value.
Press ENT to lock in the upper range process voltage
value. The display will then alternate Proc Hi with its
voltage value.
Both the upper and lower process signal points are now
calibrated. Press
to return to the Run Mode.
Flow Control
Worcester Actuation Systems