Horiba B-340 Instructions
Measurement Procedure
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CAL
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Model B-341
CODE: GZ0000096110A
June, 2008 © 2007-2008 HORIBA, Ltd.
Turn the power ON.
1
2
Press the ON/OFF switch.
MEAS
ON
OFF
Take the measurement.
3
3
Press the crop sample.
Cut the crop sample to a manageable size
and place it in the press.
Press
CAL
Add some drops of the juice to the sensor.
If the measured value is 9900 ppm or more:
Dilute the sample fluid using the provided
cup before measurement.
Example:
Measure a solution of one part
sample fluid to one part water,
then double the measured value
displayed to obtain the result for
the undiluted fluid.
Calibrate the sensor to ensure correct measurement. * Always calibrate the sensor at least once per day.
Press the CAL switch.
CAL
ppmNO
Press the MEAS switch.
MEAS
ppmNO
Wait until the stability icon ( ) lights before
pressing the switch.
5000 ppm standard solution
Guideline: 4 or 5 drops.
Always rinse the sensor after use.
4
Rinse off the sensor with water.
Close the light shield cover.Add the standard solution.
Close the light shield cover.
Measurement tip
• Washing the sensor beforehand twice
with the sample fluid improves the
measurement accuracy.
• When squeezing no succulent
vegetables, repeat squeezing action
several times.
Note: Read the Instruction Manual in addition to this procedure.
MEAS
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OFF
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CAL
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Press
MEAS
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OFF
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CAL
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Crop Measurement (Supplementary Information)
• The measurement procedure printed is just an example.
You may try out your own methods to meet your objectives.
• To measure the nitric acid ion concentration of an entire crop,
you will need to prepare sample fluid from the entire crop or
from a uniform sample.
• The nitric acid ion concentration in crops is higher in stems (leaf
stems) than in leaves. The highest concentration is generally
considered to be in the outermost stems (leaf stems).
• The sensor is affected by light, so avoid direct sunlight. Use the
light shield cover.
• Measurement may be impeded in crops with significantly high
electrical conductivity, chloride ion (Cl-) concentration or oil
concentration. Diluting the pressed fluid to a concentration within
the measurement range may reduce the impediments to
measurement.
•
Consumable parts (supplies)
Name Part No.
Replacement sensor 90880009000
5000 ppm dedicated standard solution
(Y041)
300 ppm dedicated standard solution
(Y042)
90880010000
90880011000
•
Procedure for Two-point Calibration
(For More Accurate Measurement)
Select the two-point calibration mode from the special setting modes.
Perform two-point calibration when you want high-accuracy measurement.
1.
Follow the steps below to set the two-point calibration
mode.
Ԙ Press and hold the MEAS switch for at least
5 seconds to enter the special setting modes.
All the LCD segments light, then the display
on the right appears.
ԙ Press and hold the CAL switch until the
icon and the number 3 appear.
Ԛ Press the MEAS switch once (0.5 second) to
display the number of calibrations currently set.
When one-point calibration is set, the number 1
appears.
ԛ Press the CAL switch to display the number 2.
Ԝ Press the MEAS switch.
The two-point calibration mode is now set, and the meter returns to the
standard measurement mode.
2.
Add some drops of the 300 ppm standard solution to the
kg
m
sensor, and close the light shield cover.
3.
Press the CAL switch for at least 2 seconds.
The icon flashes.
When the icon changes from flashing to steadily lit,
the first calibration has been finalized.
The first calibration must be finalized before you start the
second calibration.
4.
Add some drops of the 5000 ppm standard solution to
the sensor, and perform the second calibration by the
same procedure as the first calibration.
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