Status
Description
4-20mA
output
Analog
output
Fault
relay
LED
indicator
Test rate
F48
UV pulse stuck
at 1
1mA
0v
Open
4Hz
blinking
orange
Every 30msec
F49
Digi pot failure
1mA
0v
Open
4Hz
blinking
orange
Every 30msec
F51
UV tube broken/
constant UV
pulse
1mA
0v
Open
4Hz
blinking
orange
Every 30msec
F52
AFE (Analog
Front End)
failure
1mA
0v
Open
4Hz
blinking
orange
Every 30msec
F53
Bad SPI COM
1mA
0v
Open
4Hz
blinking
orange
Every 30msec
N0
Normal
4mA
2v
Close
1Hz
blinking
green
Every 30msec
N1
Constant
external BIT
4mA
2v
Close
4Hz
blinking
orange
Every 30msec
N2
Wrong ambient
temperature
4mA
2v
Close
4Hz
blinking
orange
Every 30msec
N3
4-20mA circuit
failure
0 mA
2v
Close
4Hz
blinking
orange
Every 30msec
N4
Fault relay
failure
4mA
2v
Open
4Hz
blinking
orange
Every 30msec
N5
Accessory relay
failure
4mA
2v
Open
4Hz
blinking
orange
Every 30msec
N6
Alarm relay
failure
4mA
2v
Open
4Hz
blinking
orange
Every 30msec
N7
Heater failure
4mA
2v
Close
4Hz
blinking
orange
Every 30msec
N8
IR or UV BIT
failure
2mA
0v
Open
4Hz
blinking
orange
Every BIT
N9
Lamp BIT failure 2mA
0v
Open
4Hz
blinking
orange
Every BIT
Reference Manual
Reference data
00809-1500-4975
June 2021
Rosemount 975
37