Endress+Hauser Proservo NMS5, Руководство по эксплуатации

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Proservo NMS5
Hauser 69
7.6 Density and Density Profile Measurements
Two different types of density measurement are available when ordered from Hauser.
•
Spot density measurement for up to 3 liquid phases
• Density profile measurement
1. Tank profile for up to 16 points for total liquid height.
2. Tank profile for upper phase liquid only.
3. Tank profile based on a manually entered profile parameter.
7.6.1 Spot Density Measurement
Spot measurement for up to 3 liquid phases is an option that is available when ordered from Hauser.
The following preconditions are required in order to assure safe and accurate operation.
• NMS5 must be configured for Spot density measurement as ordered from Hauser.
For information regarding upgrading your NMS5, contact Hauser.
•
Density values:
Figure. 67: Density Measurement
– Density values can be viewed and changed at the following matrix positions:
G0V0H5 Upper Density
G0V0H6 Middle Density
G0V0H7 Density Bottom
• The displacer is balanced at liquid level and the liquid surface is not moving.
For spot density measurement, the following parameters can be set or selected. However the factory default
settings also can be used.
Operation
Select the measurement of the density desired from UPPER DENSITY, MIDDLE DENSITY, or DENSITY BOT-
TOM at G0V2H0 "OPERATION". NMS5 raises the displacer up out of the liquid, measures its weight, and
sends the displacer down to measure the density. After density is measured, the displacer remains at that posi-
tion until UP or LEVEL command are selected at G0V2H0.
Matrix Item Setting
G1V4H3
Displacer Raise
Density
Set distance (0-300mm) for displacer to rise the level position above
during measuring density. Default setting = 150 mm. Observe the rule:
G1V4H4 = 300 n, where n = integer.
G1V4H4
Displacer
Submerg
Density
Set distance (0-300mm) for displacer to sink the level position above
during measuring density. Default setting = 150 mm. Observe the rule:
G1V4H4 = 300 n, where n = integer.
- Upper Density < Middle Density < Bottom Density
Middle Density - Upper Density 0.100 g/cm
3
Bottom Density - Middle Density 0.100 g/cm
3
e.g. 0.760 g/cm
3
e.g. 0.880 g/cm
3
e.g. 0.1000 g/cm
3
(Example)
7 Commissioning