8.6Span calibration (low concentration point calibration in case of zirconia O2 sensor)
Carry out span calibration by flowing calibration gas at the concentration set as a span value.
Flow the calibration gas (0.3 N/min.) by adjusting the needle valve of pressure regulator. Wait until the indica- tion stabilizes, and then conduct span calibration.
Press the SPAN key and the SPAN key lamp flickers.
In the case of a
Press the COMP key and the settable gas compo- nent will change.
When the gas component has been determined,
press the 
keys and select a range.
Note: The lamp will not flicker in the case of a
single-component analyzer.
Next press the CAL key and conduct span calibration. The CAL key lamp lights steadily during calibration.
Since the measuring status is resumed after calibration, continue the calibration for each component and each range.
NO |
|
|
|
| SPAN |
|
|
NO |
|
|
|
|
|
| Flickers |
|
| ENT | ZERO SPAN CAL |
( | COMP | ) |
|
NO |
|
|
|
|
|
| Flickers |
|
| ENT | ZERO SPAN CAL |
(In case of a multi component analyzer) | |||
| CAL |
|
|
NO |
|
|
|
|
|
| lights |
ENT ZERO SPAN CAL
ENT
ZERO SPAN CAL
( Lamp is turned off after calibration )
Note: On the low range of zirconia type O2 sensor, when zero gas is calibrated with 9 to 10 Vol. % O2, the zero and span calibrations interfere with each other. So, each calibration should be re- peated a few times.
When the function for automatic calibration is provided, the solenoid valve turns on and the span gas for the selected component flows upon pressing the SPAN key.
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