Endress+Hauser Proservo NMS5 Operating Instructions Manual page 60

7 Commissioning
60
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
GVH
005
340
342 DISPLACER WEIGHT
343 DISPLACER VOLUME
344 BALANCE VOLUME
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 Ø50 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".
ITEM
UPPER DENSITY
WIRE DRUM CIRC.
BALANCE position for displacer
BOTTOM plate (datum plate)
Proservo NMS5
Endress+Hauser