Endress+Hauser NRF81 - Page 68

Commissioning Tankside Monitor NRF81
68 Endress+Hauser
9.2.8 Tank calculation: Hybrid tank measurement system (HTMS)
HTMS uses level and pressure measurements to calculate the density of the medium.
In non-atmospheric (i.e. pressurized) tanks it is recommended to use the HTMS
P1+P3 mode. Two pressure sensors are required in this case. In atmospheric (i.e.
unpressurized) tanks the HTMS P1 with only one pressure sensor is sufficient.
2
4
D1
1
3 2
4
5 1
D3
3
A
B
D1
A0029275
A The "HTMS P1" measurement mode
B The "HTMS P1+P3" measurement mode
D1 P1 position
D3 P3 position
1 Level transmitter (e.g. typically FMR540 or FMR51)
2 Tankside Monitor
3 To inventory management system
4 Pressure sensor (bottom)
5 Pressure sensor (top)
1. Navigate to Setup → Advanced setup → Application → Tank configuration → Level
2. Go to Level source (→  122) and specify from which device the level is obtained.
3. Navigate to Setup → Advanced setup → Application → Tank configuration → Pressure
4. Go to P1 (bottom) source (→  181) and specify from which device the bottom
pressure (P1) is obtained.
5. If a top pressure transmitter (P3) is connected:
Go to P3 (top) source (→  185) and specify from which device the bottom
pressure (P1) is obtained.
6. Navigate to: Setup → Advanced setup → Application → Tank calculation → HTMS
7. Go to HTMS mode (→  211) and specify the HTMS mode.
8. Navigate to Setup → Advanced setup → Application → Tank configuration → Density
9. Go to Observed density source (→  179) and select HTMS.
10. Use the other parameters of the HTMS submenu to configure the calculation. For a
detailed description: →  209