Proservo NMS5
60
Hauser
7.4.2
Closed Tank
Level Calibration Procedure for Closed Tank
Closed tanks (e.g. LPG) cannot be hand-dipped. Follow the procedure shown below.
Figure. 64:
Level Calibration 1
1.
Check the NMS parameter
2.
Set the Level gauge at GVH020(BOTTOM)
Figure. 65:
Draft Level of Displacer
3.
Check that the displacer is balance and LCD (display) shows Balance.
4.
Calculate the displacer balance position.
•
In case of
Ø
50 standard displacer, when balance volume(GVH343) is reference value (a half of displace
volume), the balance point is 45mm from the bottom of the tank.
Note!
Refer to Appendix "14.3 Displacer".
GVH
ITEM
005
UPPER DENSITY
340
WIRE DRUM CIRC.
342
DISPLACER WEIGHT
343
DISPLACER VOLUME
344
BALANCE VOLUME
BOTTOM plate (datum plate)
BALANCE position for displacer
7 Commissioning