Endress+Hauser SpectraSensors OXY5500, Operating Instruction

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BA02195C OXY5500 Optical Oxygen Analyzer
Hauser 4
–
55
The first example (gray line) in Figure 4–54 shows high resolution in a low
oxygen environment. The second example (yellow line) shows a high resolution
in high oxygen environment. This also shows the behavior for measurement
values that lie outside the value range (oxygen values over a maximum of 50
will be shown as 20mA).
In the event of any error, the Error Trigger Level (2mA or 22mA) will be applied
to the currently selected port. For the input, any value outside the 4-20mA
range will be interpreted as “not valid”.
4-20mA values
In the 4-20mA VALUES screen, enter the values that correspond to 4mA, 12mA
or 20mA depending on the currently selected mode.
Modes that can be selected include:
•
Off: No values can be entered. Refer to Figure 4–55.
•
Linear: The high and low value can be entered. Refer to Figure 4–56.
The unit depends on the selected output and oxygen sensor. If the
output is set to Temperature, the unit is always
°
C.
Otherwise, the
output depends on the oxygen sensor (the oxygen unit selected in
the measurement screen will explicitly NOT be used):
– OP-3: %O
2
– OP-6: %O
2
– OP-9: ppmv
Figure 4–54 Bilinear current output vs oxygen
value