Light Barrier Signal; Fig. 8-3:Light Barrier Signal - Emerson Rosemount Xstream Series Instruction Manual

Instruction Manual
HASAxE-IM-HS
05/2006

8-4-3-1-5 Light barrier signal

Measuring Point:
Measuring instrument: Oscilloscope
Signal: rectangle (level see below)
frequency = 24 Hz (± 0.1 Hz)
Failure: No or faulty signal
Potential cause:
- IR measurement:
Signal level set point: U = 6 V
a) Chopper not connected
b) Chopper not turning
c) Light barrier not connected
d) Light barrier defective
e) Cable broken
f) BKS board defective
- Oxygen measurement w/o IR channel:
Signal level set point:
LOW < 0.45 V; HIGH > 2.4 V (TTL logic)
a) µP not working
b) BKS board defective
Emerson Process Management GmbH & Co. OHG
8-4 Troubleshooting on Components
X9, pin 2
(± 0.3 V)
SS

Fig. 8-3:Light barrier signal

How to solve:
a) Connect chopper
b) Switch off analyzer and on again
c) Connect light barrier
d) Replace chopper
e) Replace chopper
f) Replace BKS board
a) Switch off analyzer and on again
b) Replace BKS board
X-STREAM
8-15