
EC155 CO
2
and H
2
O Closed-Path Gas Analyzer
TABLE 10-3. Bits in the Gas Diagnostic Flag
bit hex value decimal Name Function
0 0x1 1 Bad Data Data are suspect (there is
an active diagnostic flag)
1 0x2 2 Sys Fault General system fault
2 0x4 4 Sys Startup Gas analyzer is starting up
3 0x8 8 Motor Speed Motor speed outside of
limits
4 0x10 16 TEC Temp TEC temperature exceeds
limits
5 0x20 32 Light Power Source power exceeds
limits
6 0x40 64 Light Temp Invalid source temperature
7 0x80 128 Light I Source current exceeds
limits
8 0x100 256 Power Off Gas head not powered
9 0x200 512 Chan Err Gas input data out of sync
with home pulse
10 0x400 1024 Amb Temp Invalid ambient
temperature
11 0x800 2048 Amb Press Invalid ambient pressure
12 0x1000 4096 CO
2
I CO
2
I exceeds limits
13 0x2000 8192 CO
2
I
o
CO
2
I
o
exceeds limits
14 0x4000 16384 H
2
O I H
2
O I exceeds limits
15 0x8000 32768 H
2
O I
o
H
2
O I
o
exceeds limits
16 0x10000 65536 CO
2
I
o
Var Moving variation in CO
2
I
o
exceeds limits
17 0x20000 131072 H
2
O I
o
Var Moving variation in H
2
O I
o
exceeds limits
18 0x40000 262144 CO
2
I
o
Ratio CO
2
signal level too low
19 0x80000 524288 H
2
O I
o
Ratio H
2
O signal level too low
20 0x100000 1048576 Cal Mem Err Gas head calibration
signature error
21 0x200000 2097152 Heater Control Heater control error
22 0x400000 4194304 Diff Pressure Differential pressure
exceeds limits
39
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