WIKA Operating Instructions Level Transmitter
– BLM-SF-FM
11
4. Operating Instructions
4.1 Controls
For usage, the front housing cap has to be unscrewed. An 8-digit alpha-
numeric LCD is available for optical control of the settings. During normal
operation, it shows the current measured values.
The display has 8-digit alphanu-
meric characters.
As the character height is 12 mm,
it is clearly legible from larger dis-
tances.
The buttons have the following functions:
Button
Function
- / +
Move through menu structure, change value
OK
Accept value, enter active submenu
4.2 Menu structure
It is possible to conduct parameter settings by using the HART® protocol
via a Field Communicator or PCS (process control system). Furthermore,
all settings can be done directly at the sensor via the display and buttons.
If no button is pressed during a time span of 30 s, the sensor returns to the
parent menu automatically.
Caution electrical connection
Because the loop current can change rapidly, switching or
regulating functions of the process control system should
be disabled when changing 4-20 mA settings.
