Calibration; Zero Calibration (0% Calibration) - Konica Minolta cm-5 Instruction Manual

Calibration

Zero Calibration (0% Calibration)

Since the CM-5 stores the data of the zero calibration (0% Calibration) performed at the factory, it is
unnecessary to repeat the zero calibration (0% Calibration) every time you turn ON the instrument. If, however,
the measurement conditions change greatly, or if the optional Target Mask (ø8 mm or ø3 mm), Petri Dish, Mini
Petri Dish, or Cell is used, you need to perform zero calibration (0% Calibration) before white calibration (100%
Calibration).
• The effects of stray light (i.e. light generated due to the flare characteristics of the optical system) will be
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compensated for automatically by the zero calibration (0% Calibration) data.
• The amount of stray light may change because of dust or dirt which has collected in the optical system, humidity,
repeated operation, or vibration and shock exerted on the instrument. In this case, performing zero calibration
(0% Calibration) periodically is recommended.
• If the instrument is not used for long periods of time, the zero calibration (0% Calibration) data stored in the
Notes
instrument may be lost. If the data is lost, zero calibration (0% Calibration) must be performed again.
• If you performed zero calibration (0% Calibration) using the optional Target Mask (ø8 mm or ø3 mm), Petri Dish
or Cell, you must perform zero calibration (0% Calibration) again before conducting measurement using the
standard Target Mask.
[Procedure]
Although zero calibration (0% Calibration) is included in the Easy Setup Wizard, the following explains the
procedure to perform zero calibration (0% Calibration) from the measurement screen.
1. Press the [CAL] button.
The <Measurement Condition Settings> screen is
displayed.
Confirm that the displayed measurement type,
Notes
measurement area and specular component setting match
with conditions of the measurement to be conducted.
The bottom of the <Measurement Condition Settings>
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screen shows two items: Zero Calibration (0% Calibration)
and White Calibration (100% Calibration). The date of the
last calibration is displayed for each item. If no calibration
has been performed yet, "--" is displayed.
2. Use the or
cross key to move the cursor to
(0% Calibration).
3. Go to the appropriate step according to the measurement type.
<Reflectance measurement> Refer to Steps 3 to 4 (Page 53).
<Reflectance measurement using Petri Dish> Refer to Steps 3 to 5 (Page 53).
<Transmittance measurement> Refer to Steps 3 to 4 (Page 54).
<Liquid transmittance measurement> Refer to Steps 3 to 4 (Page 54).
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Start the procedure from the measurement screen.
button and the or
Zero Calibration
button of the