Operation options Liquiphant FTL51B
32 Endress+Hauser
7 Operation options
7.1 Overview of operation options
7.1.1 Operating concept
• Operation with button and DIP switches on the electronic insert
• Display with optional Bluetooth module and SmartBlue (app) via Bluetooth® wireless
technology
• Indication of switching status and operational status with optional LED module (lights
visible from the outside)
• For plastic housing and aluminum housing (standard and Ex d) in conjunction with the
DC-PNP and relay electronics
• Ordering information: Product Configurator, order code for "Display; operation" option
"B"
7.1.2 Functional test using the button on the electronic insert
A0037132
36 Position of button for functional test
The functional test must be performed when the device status is OK.
Status OK: MAX safety and sensor free or MIN safety and sensor covered.
• Press the test button for at least 1 second (FEL61/62/64/64DC/67/68 electronic
inserts)
• The output changes to the safety-oriented state - the functional test of the device takes
place
• Test duration at least 10 s or until the button is released if the button is pressed for
> 10 s
• The device returns to normal operation if the internal test is successful
The LEDs flash one after another as a chaser light during the functional test.
If the housing cannot be opened during operation due to explosion protection
requirements, e. g., EX d/XP), the functional test can also be performed from the outside
using the test magnet (FEL62, FEL64 DC, FEL68). The functional test of the PFM
electronics (FEL67) and NAMUR electronics (FEL68) can be started at the Nivotester
FTL325P/N.
Pay attention to the information in the Safety Manual for proof testing safety
equipment in accordance with SIL or WHG (German Water Resources Act).
1. Make sure no undesired switching processes are triggered!
2. Press the button "T" on the electronic insert for at least 1 s (e. g., with a screwdriver).
The output changes from the OK status to demand mode.
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