INFICON Composer Gas Concentration Controller - Manual (Page 137)

6 - 5
IP
N 07
4-
28
9L
Composer Operating Manual
6.2.5 Category 5; User Related
Table 6-5 Category 5; User Related
Failure Symptom Visibility Effect On Accuracy
Wrong M and/or γ
entered
None Relative to error. Refer
to
section 3.1.4 on page
3-2 .
M and
γ
are identical for
carrier and precursor
Warning illuminates No results given.
Reference Zero set at
inappropriate time None Relative to delta F
2
from
true zero. Maximum
discrepancy restricted by
limits associated with
designated carrier gas.
Reference Zero left at
factory default Zero LED off Minimal
Cell's end caps loosened Facility toxic gas alarms Various
Change of process
pressure without re-zero None See dF/dP charts, refer
to
section 3.1.6 on page
3-5 .
Large barometric
pressure change without
re-zero None Up to 0.5 Hz
Change of cell's
temperature without
re-zero Zero LED off if T
0
is
changed
Proportional to delta T