FINE TUNE
Up arrow
(exit calibration)
Set 12 mA
Press CAL Key
Down arrow
(from previous menu)
Down arrow
(to next menu)
Down
arrow
3.3 Automatic calibration
The automatic calibration (ACAL) performs several self-adjustments, as well as a zero calibration,
a span calibration, and tunes the positioners PID gain settings. Enter and start the automatic
calibration from the menu level. From the menu level press the down arrow button until ACAL is
shown on the display (ACAL routine shown below).
Note:
Automatic calibration requires an input current of 12 mA.
Auto calibrate*
* 1. Sensor calibration
2. Low span calibration
3. High span calibration
4. Transducer calibration
5. Auto PID calibration
3.4 Proceed to exiting calibration or perform advanced calibration
At this point the calibration of the positioner is complete. The automatic calibration that was
performed in Section 3.3 is adequate for most applications. If no advanced calibration is required
proceed to Section 3.5 to exit calibration. If the user requires to use the advanced settings to fine
tune the positioner he may proceed with the remainder of this step and perform adjustments and
calibrations in the Manual Calibration Menu (MCAL). From the menu level press the down arrow
button until MCAL is shown on the display (MCAL routine shown below).
Up arrow
(exit calibration)
Down arrow
(from previous menu)
Down arrow
(to next menu)
Up arrow
Down
arrow
Up arrow
Up arrow
Up arrow
Up arrow
Up arrow
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
when complete
Press CAL key
Press CAL
key
Set 12 mA
Press CAL key
Set 12 mA
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
Press CAL key
when complete
Press CAL key
when complete
Press CAL key
when complete
Press CAL key
when complete
Press CAL key
Down
arrow
Down
arrow
Down
arrow
Down
arrow
Press CAL key
Down
arrow
Down
arrow
Down
arrow
Down
arrow
Down
arrow
Down
arrow
Down
arrow
Down
arrow
Down
arrow
Set mA for
zero position
Set mA for
span position
Sensor
calibration
Transducer
calibration
Set 4.0 mA
Use up & down arrow
keys to set to zero
input current
Set 20.0 mA
Use up & down arrow
keys to set to span
input current
Low/zero
calibration
Span
calibration
Automatic
PID routine
Adjust using
up & down
arrow keys
(1-20)
Adjust using
up & down
arrow keys
(1-255)
Adjust using
up & down
arrow keys
(1-5)
Adjust using
up & down
arrow keys
(1-255)
Adjust using
up & down
arrow keys
(1-255)
Adjust using
up & down
arrow keys
(1-20)
Optional:
select arbitrary
zero using up &
down arrow keys
Optional:
select arbitrary
span using up &
down arrow keys
Read transmitter
value & use up &
down arrows to
enter the present
zero value
Use up & down
arrows to enter the
desired zero current,
typically 4.0 mA
Read transmitter
value & use up &
down arrows to
enter the present
span value
Use up & down
arrows to enter the
desired span current,
typically 20.0 mA
Special note flow capacity
SmartCal standard flow design is suitable
for actuator swept volumes of a minimum
40 inch
3
(0.65 liters) to a maximum of 600
inch
3
(9.8 liters) for proper auto calibration
functionality. It should also be noted that
this is to be used as a general guideline only.
The actuator/ valve package dynamics would
dictate the success of the auto calibration
routine and could be compromised by the
following: instrument air supply volume
capacity, actuator sizing, tubing size and
actuator/valve health.
SmartCal optional high flow design is suitable
for actuator swept volumes of a minimum
200 inch
3
(3.3 liters) to a maximum of 1000
inch
3
(16.4 liters) for proper auto calibration
functionality. It should also be noted that
this is to be used as a general guideline only.
The actuator/ valve package dynamics would
dictate the success of the auto calibration
routine and could be compromised by the
following: instrument air supply volume
capacity, actuator sizing, tubing size and
actuator/valve health.
OFF
Press CAL key
ON
ON
OFF
page 13
AVID SmartCal valve positioner
Installation & operating instructions
