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Measurements Reported
in Response to DA
Command for 49i and 49i
Single Range Mode for 49i and
Dual/Auto Range Mode for 49i
Dual/Auto Range Mode for 49i PS
Operating and Error Status
Thermo Fisher Scientific
The attached concentrations are in the selected gas units. The
measurements that are attached to the response if not valid in a particular
mode then a value of 0.0 will be reported.
The following measurements reported in response to DA command are for
the Model 49i and 49i Primary Standard.
PS
The 1 measurement reported in single range mode for the Model 49i and
49i PS
49i Primary Standard includes:
•
O
3
The 2 measurements reported in dual or auto range modes for the Model
49i include:
•
low O
3
•
high O
3
The 2 measurements reported in dual or auto range modes for the Model
49i Primary Standard include:
•
O
Actual
3
•
O
Set point
3
See
Table D-1
Model 49i and the Model 49i Primary Standard.
Table D-1. Operating Status for Model 49i and 49i Primary Standard
Bit
Hex-value
Operating status:
Service Mode (On)
Maintenance (Local)
Zero gas (On)
Span gas (On)
Not used
for operating status and
D7
D6
8
7
80
40
MSB
0
0
0
0
0
0
0
0
0
0
Geysitech (Bayern-Hessen) Protocol
Geysitech Commands
Table D-2
for error status for the
D5
D4
D3
D2
6
5
4
3
20
10
08
04
LSB
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
1
0
0
Model 49i Instruction Manual
D1
D0
2
1
02
01
0
1
1
0
0
0
0
0
0
0
D-7
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