Endress+Hauser NRF81 - Page 70

Commissioning Tankside Monitor NRF81
70 Endress+Hauser
Selecting the HTG mode
1. Navigate to Setup → Advanced setup → Application → Tank calculation → HTG
2. Go to the HTG mode parameter (→  206) and select the mode according to the
following table.
HTG mode Measured variables Required additional parameters Calculated variables
P1 only P1 • ρ
P
• g
• H
P1
L
HTG
P1 + P3 • P1
• P3
• ρ
P
• ρ
V
• ρ
A
• g
• H
P1
• H
P3
L
HTG
(more precise calculation for
pressurized tanks)
P1 + P2 • P1
• P2
• ρ
A
• g
• H
P1
• H
P1-P2
• ρ
P
• L
HTG
P1 + P2 + P3 • P1
• P2
• P3
• ρ
V
• ρ
A
• g
• H
P1
• H
P1-P2
• H
P3
• ρ
P
• L
HTG
(more precise calculation for
pressurized tanks)
Assigning the P1 (bottom) pressure sensor
1. Navigate to : Setup → Advanced setup → Application → Tank configuration
→ Pressure
2. Go to the P1 (bottom) source parameter (→  181) and select the device from
which the bottom pressure is obtained.
3. Go to the P1 (bottom) parameter (→  118) and check whether the indicated
pressure matches the actual pressure at the P1 position. If necessary, the indicated
pressure can be corrected by the P1 offset parameter.
4. Go to the P1 position parameter (→  182) and enter the distance from the datum
plate to the P1 sensor.
5. Go to the P1 abs / rel parameter (→  182) and specify whether the P1 sensor
measures an absolute or a relative pressure.
Assigning the P2 (middle) pressure sensor
This procedure is only required for the following HTG modes:
• P1 + P2
• P1 + P2 + P3
1. Navigate to Setup → Advanced setup → Application → Tank configuration → Pressure
2. Go to the P2 (middle) source parameter (→  183) and select the device from
which the middle pressure is obtained.
3. Go to the P2 (middle) parameter (→  118) and check whether the indicated
pressure matches the actual pressure at the P2 position. If necessary, the indicated
pressure can be corrected by the P2 offset parameter (→  184).
4. Go to the P1-2 distance parameter (→  184) and enter the distance between the
P1 and P2 sensors.
5. Go to the P2 abs / rel parameter (→  184) and specify whether the P2 sensor
measures an absolute or a relative pressure.