Operation
5.5 Use of local user interface
SITRANS TF280 WirelessHART
Operating Instructions, 10/2010, A5E02619566-02
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5.5.5
Use of key combinations
Deep sleep function
● Activation/deactivation:
Keep the M and ↑ keys pressed simultaneously for >10 s.
– If you activate this function, the power consumption of the device is reduced to a
minimum. The display is switched off, and the connection to the wireless HART
network is interrupted.
– If the function is deactivated, the display is switched on again and your device
automatically attempts to reestablish the connection to the wireless HART network.
Backlight function
● Activation/deactivation:
Press the ↑ and ↓ keys simultaneously.
– The display backlight is activated, and is automatically deactivated after approx. 20 s.