Filter
Top Products
– 14 –
8.4 Calibration concentration setting (zirconia O
2
sensor)
A zirconia O
2
sensor sets the zero (air) point (span point stipulated in the laws for measurement and
weighing) of the O
2
analyzer. For the density of calibration gas to be used, refer to “8.2 Preparation of
standard gas”.
✩Setting of calibration concentration for zero (air)
point (zero stipulated in the laws for measurement
and weighing)
By pressing the FUNC key in the measuring status,
the calibration concentration previously set for the zero
(air) point will appear on the main indication.
The CAL SET LED of the function indicating lamps
will flicker.
By pressing the key, the higher digit of the main
indication of the O
2
analyzer will flicker and zero point
setting is enabled.
Press the keys to select a range.
The numeric value will be incremented by pressing
key. The digit to be set is selected by pressing the
key.
Setting ranges are 20.2 to 21.9 Vol. % for high
range and 7.0 to 21.9 Vol. % for law range.
Set the air concentration for both high and low
range.
Note)
Press the ENT key after setting the zero point. Set-
ting operation is completed.
Note: When using air for the high range and 9 to 10 Vol. % O
2
/N
2
for the low range, set the density
for each range.
When viewing from the zirconia O
2
sensor side, the air point corresponds to the zero point.
Therefore, calibration should begin with the air point.
Also, since the air point and low concentration point can be calibrated by the zero calibra-
tion key and span calibration key, respectively, the air point and low concentration point
are regarded as the zero and span in this manual.
ENT
CAL SET
FUNC
O
2
O
2
O
2
O
2
O
2