Page 6 of 23
11/14/2006
Rev. 14
Oxygen Exponent
The range of oxygen is factory configured using the oxygen exponent number. Percent
oxygen is the standard setting where the oxygen exponent is set to 2 and the output range is
0.00% to 20.9%. For a part per million (ppm) range the exponent would be set to 6 and the
output range of 0.00 X 10
-6
to 99.99 X 10
-6
.
TC Type
The following table shows the available thermocouple types and the ranges. BOLD
indicates the typical oxygen default.
Thermocouple
type
Zero ºF
Zero °C
Span ºF
Span °C
B
800
425
3000
1650
C
32
0
3000
1650
E
32
0
1300
700
J
32
0
1300
700
K
32
0
2300
1260
N
32
0
2300
1260
NNM
32
0
2000
1090
R
300
150
3000
1650
S
300
150
3000
1650
T
32
0
700
370
The Cold Junction correction is applied to all thermocouple types.
Analog Output Channels
The analog outputs are factory configured to provide 4 to 20mA signals proportional to
selectable process values.
NOTE
The Analog Output Channels are isolated self-powered
current sources and do not require an external supply.
If a chart recorder is to be used, it should have input specifications within 4 to 20 mA. If
the recorder only responds to VDC inputs it will be necessary to add a 250 ohm dropping
resistor across its input terminals.
The ideal location of the recorder is adjacent to the instrument but it may be located
remotely if the connecting wires are properly shielded. For best results, the chart recorder
input(s) should be isolated from ground.
