Negative Reference Voltage; Temperature Sensor - Emerson Rosemount Xstream Series Instruction Manual

X-STREAM

8-4-3-1-3 Negative reference voltage

Measuring Point:
Measuring instrument:
Signal: inverse positive
reference voltage
Failure: Both reference voltages differ by
more than 10 mV
(U
ref. pos.

8-4-3-1-4 Temperature sensor

Measuring Point:
Measuring instrument:
Signal: approx. 0 ± 500 mV DC
(at ambient temperature)
Failure: Signal not within stated range
Potential cause:
- IR measurement or paramagnetic
Oxygen measurement
a) sensor not connected
b) sensor defective
c) sensor cable broken
d) BKS board defective
- electrochemical Oxygen measurement:
a) sensor not connected
b) OXS board defective
c) BKS board defective
8-14
8-4 Troubleshooting on Components
X5, pin 4
DVM
+ U < 10 mV) !
ref. neg.
X8
DVM
How to solve:
Replace BKS board
How to solve:
a) connect temperature sensor
b) replace temperature sensor
c) replace temperature sensor
d) replace BKS board
a) connect temperature sensor
b) replace OXS board
c) replace BKS board
Emerson Process Management GmbH & Co. OHG
Instruction Manual
HASAxE-IM-HS
05/2006