2. Set Wavelength and Activate Auto-wavelength Recognition (TWIN)
Press the button repeatedly until the desired wavelength is displayed. You
can select from six possible wavelengths: 850nm, 1300nm, 1310nm, 1490nm,
1550nm, 1625nm.The instrument defaults to the wavelength which the user set
in the last test. When used with the FOLS-203 and FOLS-204 optical light source,
the wavelength will shift automatically according to the output wavelength of the
light source. Long press the button to activate the auto-wavelength
recognition and the "TWIN" will show on the LCD. Short press the button to
close the "TWIN".
3. Switch Measurement Mode
There are 3 measurement modes you can choose from by pressing the button
repeatedly, dB, dBm and mW.
4. Set Reference Level
(1) Press the button to display the stored reference level for the current
wavelength and a sign of“REF”will be displayed on the screen to indicate that it is
a reference value. The displayed value only lasts 1 second.
(2) Press and hold the button over 2 seconds to store the presently
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measured value as the new reference level for the current wavelength. During the
process, the“REF”sign flashes twice on the screen and buzzer sound is heard.
Once the new reference level is set, the instrument switches to the dB measure-
ment mode. The displayed value only lasts 1 second.
5. Switch Backlight of LCD On/ Off
Press the button . The backlight switches on.
Press the button again. The backlight switches off.
6. Frequency Detecting
If the tested wavelength is carrying a tone of 270Hz, 1kHz, or 2kHz, the respective
frequency indicates on the screen.
7. Overflow of Measured Power Value
If the measured power value is too high, the LCD screen will display“HI”.
If the measured power value is too low, the LCD screen will display “LO”.
8. Storage of Current Test Value
Press the button over 2 seconds, the “SAVE” flashes on the screen once with
the sounds of the buzzer. It indicates the setting is finished. It will display the
stored value and the serial number of the storage. Then, the power meter will
return to the test state automatically.
9. Check the Storage Records
Press the button , it will display the latest record.
Press the button , it will browse the forward records.
Press the button , it will browse the afterward records.
Press the button and , it will delete all the records.
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