About Zero Calibration; How To Check Zero Calibration; 1� How To Check Zero Calibration; Measurement Functions Of Probes - Konica Minolta CA-410 Instruction Manual

About Zero Calibration

Zero calibration performs zero point adjustment while blocking entry of light into the probe's receptor.
Be sure to perform zero calibration whenever the instrument is started.
Notes on zero calibration
• Perform zero calibration if the ambient temperature has changed.
• Do not direct the end of the probe toward an illuminant with high luminance during zero calibration.
• Zero calibration takes longer with the CA-VP402 than other probes.
1� How to Check Zero Calibration
To check whether zero calibration has been performed correctly, block entry of light into the end of the probe using a
blackout curtain, etc. so that the receptor is not exposed to light.
• Zero calibration has been performed correctly if zero is displayed for the Lv section on the controller's measured value
display. If a value other than zero is displayed, perform zero calibration again.

Measurement Functions of Probes

1� Measurement Speeds
A probe has the following four modes (measurement speeds), which are available according to the purpose.
A probe outputs every measured value and a PC or data processor connected to it can retrieve all of them through
communication. Generally, however, not all measured values are displayed but values are displayed at an appropriate
interval.
FAST mode
Requires short measurement time, but may compromise measurement repeatability for low-luminance measurements.
SLOW mode
Repeats FAST mode measurements several times. Use this mode when you want to perform measurement with high
repeatability.
AUTO mode
Switches FAST, SLOW, and setting with a further longer integration time automatically depending on the luminance level.
Normally, this is the recommended setting.
LTD�AUTO mode
Switches between FAST and SLOW settings automatically depending on the luminance level.
Notes on selecting the measurement speed
• The currently selected measurement speed setting is stored in the probe.
The set measurement speed will be used at the next start-up.
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