Sensor Frequency; Heartbeat Technology (Optional); Heartbeat Verification; Heartbeat Verification/Monitoring - Endress+Hauser Liquiphant FTL51B Operating Instructions Manual

Liquiphant FTL51B HART
2) The wizard can be started on the display but it only shows the Passed option or Failed option result.
Endress+Hauser
10.3.2

Sensor frequency

Continuous operation in the 4 to 20 mA mode. Loop current proportional to oscillation
frequency of fork.
1. Navigation: Application → Sensor → Sensor configuration
2. Set the Mode of operation parameter to the Sensor frequency option.
3. Set the Density setting parameter according to the application (> 0.4 g/cm³, > 0.5 g/
cm³, > 0.7 g/cm³ ).
 This is used to ensure that the Fork state parameter (covered/uncovered)
continues to be displayed correctly.
4. Navigation: Guidance → Commissioning
5. Set the Lower range value output parameter to the frequency that should
correspond to a 4 mA output current.
6. Set the Upper range value output parameter to the frequency that should
correspond to a 20 mA output current.
10.4

Heartbeat Technology (optional)

10.4.1

Heartbeat Verification

The "Heartbeat Verification" module contains the Heartbeat Verification wizard, which
verifies the current instrument health and creates the Heartbeat Technology verification
report:
• The wizard can be used via the operating tools (SmartBlue app, DTM, display
• The wizard guides the user through the entire process for creating the verification
report.
• The operating hours counter, minimum/maximum temperature indicator and
minimum/maximum frequency indicator are displayed.
• If the oscillation frequency of the fork increases, a corrosion warning appears.
• The as-delivered state of the oscillation frequency in air is indicated on the verification
report. A high oscillation frequency is an indicator of corrosion. A lower oscillation
frequency indicates buildup or a sensor covered by the medium. Deviations of the
oscillation frequency from the oscillation frequency in the as-delivered state can be
caused by the process temperature and process pressure.
10.4.2

Heartbeat Verification/Monitoring

The Heartbeat submenu is only available when operating via FieldCare, DeviceCare or
the SmartBlue app. It contains the wizards that are provided with the Heartbeat
Verification and Heartbeat Monitoring application packages.
Documentation on the Heartbeat Technology: Endress+Hauser website:
www.endress.com → Downloads.
Operation
2)
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