Emerson Rosemount OCX 8800 Reference Manual page 114

Foundation Fieldbus
Table 7-3: Descriptions of PlantWeb Alerts
Alerts Alarms
Thermocouple Transducer block:
Malfunction 1. O
2. O
ted
3. O
versed
4. Comb T/C
Open
5. Comb T/C
Shorted
6. Comb T/C Re-
versed
7. S/B T/C Open
8. SB T/C Shor-
ted
9. SB T/C Re-
versed
104
(continued)
AMS tab
T/C Heater Alerts
T/C Open
2
T/C Shor-
2
T/C Re-
2
What does the Recommended
alert indicate? action
This alert indi- Check the ther-
cates a miswired mocouple wires
or faulty thermo- for loose or bro-
couple. ken connections,
short circuit con-
dition, reverse
wire condition.
Description
When the heater
thermocouple
alarms are initi-
ated, they diag-
nose one of three
states:
1. Open
2. Shorted
3. Reversed
The problem
could be caused
by a mechanical
failure in the
probe tip or at the
electronics. Cycle
power to the de-
vice to resume
operation. Do the
diagnosis at the
analyzer. Refer to
Section 8.2 for de-
tails.
OCX 8800