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9-2 How to Adjust Light Intensity
9-2-1 Adjustment of light intensity
If the light intensity is insufficient or excessive on the measurement screen as shown in the
following figures, adjust the light emitting power of the relay amplifier.
5000mV
1000mV
Insufficient light intensity
5000mV
1000mV
■ Adjustment method
(1) Set the measurement screen on the PC to Free Run mode.
(2) Close the mold on the molding machine (this is the basic condition for adjustment).
(3) Adjust the light emitting power of the relay amplifier.
For the adjustment procedure, refer to the "Adjusting the light intensity of relay amplifier"
on the next page.
(4) Vary the power and adjust to the vicinity of 2000 mV on the measurement screen.
(5) Run the molding. If the minimum and maximum values of the waveform are not saturated,
the adjustment is complete.
5000mV
1000mV
Appropriate light intensity
Light intensity up
time
Light intensity up
Saturated
time
time
5000mV
1000mV
Excessive light intensity
34
Saturated
Light intensity down
time
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