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Manual
00809-0100-4925
or sensor nearing the end of its life. When a transmitter is in fault mode, take immediate
action to determine the source and correct the fault condition.
Emerson 925 transmitters and 625 sensors continually check for situations that may
prevent the transmitter and sensor from providing an expected response to ambient
conditions and records these as a fault condition in the event log and the output(s) of
the transmitter. When the transmitter detects a system fault, the amber Status LED will
flash fast (250 milliseconds on, 250 milliseconds off), the analog output will output a 2.5
mA signal, and the fault relay will change states from normally open to normally closed
(de-energize to indicate a fault condition).
Note
The fault relay output is not commonly used to imitate an automatic shutdown. The fault
output indicates a potential problem with the transmitter not an alarm condition.
3.5
Local operator interface (LOI)
The Rosemount 925 Transmitter uses through-the-glass infrared (IR) touch buttons to
navigate the LOI display.
Figure 3-8
Figure 3-8: Front view of LOI
For best results when activating the IR touch buttons, ensure that your finger covers the
complete surface of the glass above the button.
The IR buttons have automatically adjusting sensitivity, meaning that they will adjust to
installation conditions, such as the cover being removed.
3.5.1
Unlock local operator interface (LOI)
The Rosemount 925 Transmitter comes with a screen lock feature as a default to inhibit
accidental operation and potential environmental stimulus that might activate the infrared
(IR) touch buttons.
For added safety, you can enable a four-digit passcode instead of the following standard
unlock sequence. You can do this through the LOI or via HART
Refer to
Rosemount 925FGD
shows the location of the IR buttons on the left, right, and bottom of the LOI.
LOI menu tree
and
HART
communication.
®
Installation
March 2023
.
®
15
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