Advanced Instruments Inc.
The display will shift to the next higher range when the oxygen reading exceeds 99.9% of the upper limit of the
current range. The display will shift to the next lower range when the oxygen reading drops to 85% of the upper limit
of the next lower range.
For example, if the transmitter is reading 1% on the 0-10% range and an upset occurs, the display will shift to the 0-
25% range when the oxygen reading exceeds 9.9%. Conversely, once the upset condition is corrected, the display will
shift back to the 0-10% range when the oxygen reading drops to 8.5%.
Manual Sampling
Access the MAIN MENU by pressing the MENU key.
Advance the reverse shade cursor using the ARROW keys to highlight MANUAL SAMPLE.
Press the ENTER key to select the highlighted menu option.
The following display appears:
MAIN MENU
AUTO SAMPLE
MANUAL SAMPLE
CALIBRATION
>>>
MANUAL RANGE
25%
1%
1000 PPM
100 PPM
10 PPM
Advance the reverse shade cursor using the ARROW keys to highlight the desired MANUAL RANGE.
Press the ENTER key to select the highlighted menu option.
The following display appears with the range selected and oxygen concentration of the sample gas:
MANUAL RANGE
25%
1%
1000 PPM
100 PPM
10 PPM
>>>
0.3%
MANUAL SAMPLING
1% RANGE
76 F 100 KPA
If the oxygen value goes above the 1%, display will not shift to the next higher range. Instead, when the oxygen
reading exceeds 110% of the upper limit of the current range, an OVER RANGE warning will be displayed.
1.25 %
OVERRANGE
MANUAL SAMPLING
1% RANGE
76 F 100 KPA
Once the OVER RANGE warning appears the user must advance the transmitter to the next higher range.
NOTE: With oxygen reading above 110% of the selected range, the analog signal output will increase but will freeze at
a maximum value of 1.2 V. After the oxygen reading falls below the full scale range, the voltage signal will become
normal.
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