Emerson Rosemount 975 Reference Manual page 23

Reference Manual
00809-1500-4975
Heater on
temperature
Enable alarm latch
3.9.2 BIT settings
These BIT settings may be configured.
Enable Automatic BIT
Fault count
Interval (in minutes)
Activate alarm on
successful manual BIT
Activate accessory relay on
successful manual BIT
Post manual BIT indication
duration (in seconds)
3.9.3 Accessory relay options
These options may be changed as described.
Activate accessory
relay on warning
Accessory relay as EOL When selected, the accessory relay is activated.
Accessory relay as FOV When selected, the accessory relay is activated where FOV
Field of view (FOV)
integrity
Rosemount 975
Temperature at which the demister is activated, if the heat mode
is set to Auto.
Default: 5 °C
When selected, the alarm remains on even when the signal
abates.
Default: Not enabled
When selected, the BIT runs automatically according to
the settings.
Default: Enabled
Number of sequential BIT faults before BIT fault indication.
Default: 3
Duration between BIT cycles (maximum 60).
Default: 15
Activates an alarm when a manual BIT is successfully
completed.
Default: Not enabled
Activates the accessory relay when a manual BIT is
successfully completed.
Default: Not enabled
Enables the user to configure the alarm duration
(maximum 60) after successful manual BIT.
Default: 3
When the detector's status is warning, the accessory relay is
activated.
Default: Not enabled
Default: Not enabled
fault is detected.
Default: Not enabled
When selected, upon change of detector orientation, the
detector will indicate fault.
Default: Not enabled
Operation
June 2021
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