Micropilot NMR84
Operating menu
Hauser
199
"HTMS" submenu
Overview
The Hybrid Tank Measurement System (HTMS) is a method to calculate the density of a
product in a tank based on both a (top mounted) level and at least one (bottom mounted)
pressure measurement. An additional pressure sensor can be installed at the top of the
tank to provide information about the vapor pressure and to make the density calculation
more accurate. The calculation method also takes into account a possible level of water at
the bottom of the tank to make density calculations as accurate as possible.
HTMS parameters
H
P1
V
P1
P3
L
P
L
W
Δ
P
H
P3
ρ
P
ρ
V
ρ
A
A
B
g
A0028847
55
HTMS parameters
A
Product
B
Water
Parameter
Navigation path
P1 (Bottom pressure)
Setup → Advanced setup → Tank configuration → Pressure → P1 (bottom)
H
P1
(Position of P1 transmitter)
Setup → Advanced setup → Tank configuration → Pressure → P1 position
P3 (Top pressure)
Setup → Advanced setup → Tank configuration → Pressure → P3 (top)
H
P3
(Position of P3 transmitter)
Setup → Advanced setup → Tank configuration → Pressure → P3 position
ρ
P
(Density of the product
• Measured value: Setup → Advanced setup → Calculation → HTMS → Density value
• User-defined value: Setup → Advanced setup → Calculation → HTMS → Manual upper density
ρ
V
(Vapor density)
Expert → Application → Tank configuration → Density → Vapor density
ρ
A
(Ambient air temperature)
Setup → Advanced setup → Tank configuration → Density → Air density
g (Local gravity)
Expert → Application → Tank Calculation → Local gravity
L
p
(Level of the product)
Operation → Tank level
L
W
(Bottom water level)
Operation → Water level
V = L
W
- H
P1
Δ
P
= L
P
- L
W
= L
P
- V - H
P1
1)
Depending on the situation this parameter is measured or a user-defined value is used.
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