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MEASURING POINTS OF BKS AND OXS
17 - 5
ETC00781(1) Series 100 e 10/2001
Rosemount Analytical
MEASURING POINTS OF OXS
17.1.7 Analog Preamplifiering
a) paramagnetic oxygen measurement
Measuring point: X 25 channel 1
Measuring device: DVM
Signal: At zero gas purge: 0 V dc (± 50 mV)
At ambient air (approx. 21 Vol. - % O
2
): 500 mV dc (± 50 mV)
Failure: No signal or incorrect measuring values.
Possible reasons: a) oxygen sensor not connected (see chapter 18.).
b) oxygen sensor faulty (exchange sensor).
c) BKS faulty (exchange BKS).
a) IR measurement
Measuring point: X 25 channel 1 (not for analyzer with oxygen measurement)
X 27 channel 2
Measuring device: DVM
Signal: At zero gas purge: 0 V dc (± 100 mV)
There should be a minimum difference of 600 mV
(measuring ranges < 1000 ppm difference 500 mV) between
zeropoint voltage and sensitivity voltage.
Failure: No signal or incorrect measuring values.
Possible reasons: a) Detector not connected (see chapter 18.).
b) Detector faulty (exchange detector).
c) BKS faulty (exchange BKS).