Emerson Rosemount Oxymitter 4000, Reference Manual, Page: 56 / 198

a. 4-20 mA signal: The 4-20 mA signal represents the O
2
value and can also
operate the Rosemount 751 LCD Loop Display or any other loop-powered
display. Superimposed on the 4-20 mA signal is HART
®
information that is
accessible through a handheld communicator or AMS software.
WARNING
If using a Rosemount IMPS 4000 or SPS 4001B, install it in a non-hazardous,
explosive-free environment.
b. Calibration handshake/Logic/I/O: You can use this output signal to trigger an
alarm or provide a calibration handshake signal to a Rosemount IMPS 4000 or
SPS 4001B.
If not using autocalibration, a common bi-directional logic contact is
provided for any of the equipment alarms listed in
Table 2-8 .
Table 2-8: Diagnostic LEDs
LED Flashes Status 4-20 mA line Fault Recoverable
Heater C/T 1 Open Dependent on position 3 of
SW2
(1)
1 No
2 Shortened Dependent on position 3 of
SW2
(1)
2 No
3 Reversed Dependent on position 3 of
SW2
(1)
3 No
4 A/D Comm Error Dependent on position 3 of
SW2
(1)
4 No
Heater 1 Open Dependent on position 3 of
SW2
(1)
5 No
2 High High Temp Dependent on position 3 of
SW2
(1)
6 No
3 High Case Temp Dependent on position 3 of
SW2
(1)
7 Yes
4 Low Temp Dependent on position 3 of
SW2
(1)
8 Yes
5 High Temp Dependent on position 3 of
SW2
(1)
9 Yes
O
2
cell 1 High mV Dependent on position 3 of
SW2
(1)
10 Yes
3 Bad Track O
2
11 Yes
4 EEprom Corrupt Dependent on position 3 of
SW2
(1)
12 No
Calibration 1 Invalid Slope Track O
2
13 Yes
2 Invalid Constant Track O
2
14 Yes
3 Last Calibration Failed Track O
2
15 Yes
Install Reference Manual
October 2019 00809-0100-4340
56 Emerson.com/Rosemount