Honeywell FlexLine SmartServo 954, Руководство по обслуживанию

Страница: 262 / 304

OPERATION
254 Service Manual Part No.: 4417340 Revision 1
954 SmartServo FlexLine
Verify level calibration on top of ball valve
If the top of the ball valve is used as reference point, the level calibration
of the 954 SmartServo FlexLine can be verified.
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
Error! Reference
source not found. .

Proceed as follows:
Entity name Entity name
(SmartView) Description
[Calibrate] [Calibrate]
(Product level)
The displacer will be raised until it stops against the 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]
(Product level)
Unlock the gauge and wait the displacer reaches the top
of the ball valve.
[Reference level] [Reference level]
(Product level)
Request for the reference level value, which was
established during calibration. The level reading from the
gauge should not differ more than ±2 mm (±1/16") with the
value in entity [Reference level].
[Calibrate] [Calibrate]
(Product level)
The displacer will now raise from the ball valve. Let it stop
against the flange or give a freeze command.
Open the ball valve.
[Unlock] [Unlock]
(Product level)
Unlock the gauge. The displacer will now move down till it
reaches the level
If the reference level value and the gauge reading differ more than the
specified value, the calibration procedure as described in section
7.6.3
should be repeated.