Level Calibration Using The Top Of Ball Valve - Honeywell FlexLine SmartServo 954 Service Manual

COMMISSIONING

Level calibration using the top of ball valve

Entity name
[Calibrate]
[Unlock]
[Reference level]
[Accept reference]
[Calibrate]
[Unlock]
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If level dipping is not possible, the 954 SmartServo FlexLine can be
calibrated using the top of a ball valve as reference point.
Make sure the servo auto test downwards is disabled, else the servo gauge will end
up in a SAT failure and will stop measuring level. Refer to section


Proceed as follows:
Entity name Description
(SmartView)
[Calibrate] The displacer will be raised until it stops against the
(Product level) flange of the level gauge.
Caution
If a 45 mm displacer is used, immediately stop the
Calibrate command as soon as the displacer is above
the ball valve, followed by a freeze command.
Make sure the displacer is positioned above the ball
valve. Close the ball valve.
[Unlock] Unlock the gauge and wait the displacer reaches the top
(Product level) of the ball valve.
Calculate the immersion depth of the displacer at the
product interface (for a 90 mm displacer use 3 mm; for a
45 mm displacer use 12 mm).
[Reference level] Enter the position of the top of the ball valve with respect
(Product level) to the tank zero adding the immersion depth of the
displacer at the product level.
[Accept reference] By giving this command, the level value entered in entity
(Product level) [Reference level] is accepted as level value and will be
shown on the display after the automatic reset.
[Calibrate]
The displacer will now raise from the ball valve. Let it
(Product level) stop against the flange or give a freeze command.
Open the ball valve.
[Unlock]
(Product Unlock the gauge. The displacer will now move down till
level) it reaches the level
For verification of the level calibration, refer to section
Service Manual
954 SmartServo FlexLine
8.7
8.8.2
Part No.: 4417340 Revision 1