Measurement
33
Table 3 List of items displayed on the Cal menu
Screen 1
Screen 2
Calibration
Type
Description
Action
Remarks
Zero
Zero
calibration
The current
measured value
blinks. The value
displayed when the
ENT key was
pressed is set to
zero.
Wash the sensor head
beforehand. Place the
sensor head in a bucket
filled with water, and wait for
indications to become stable
at a value close to zero.
After indications have
become stable, press the
ENT key and complete zero
calibration by targeting at as
low a value as possible.
Span
Span
calibration
The coefficient of the
auxiliary indicator
blinks. It can be
adjusted with the
▲
/
▼
key. A measured
value changes in
proportion to a
coefficient.
Obtain a coefficient from a
correlation to an analyzed
value, and enter a
coefficient that can be
matched to the analyzed
value.
For this operation, you can
obtain a concentration while
looking at a measured value
if the concentration is stable.
Enter a coefficient obtained
from a correlation to an
analysis if concentration
fluctuations are large.
