Promax PROLITE-20, Инструкция по эксплуатации

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INSTRUCTION MANUAL. PROLITE-20/21
Page 16
February 2001
4.2.6 Display backlight ( BackLight )
Enables backlight activation/deactivation (ON/OFF). The possibility of illuminating the
display enables you to comfortably work under poor lighting (night-time, badly lit locations,
etc.) and, therefore, increases the number of situations where it is particularly useful.
To activate/deactivate the backlight, turn the rotary selector until you see BackLight
on the display, then press the selector to change the configuration. The configuration will
change sequentially.
The instrument enables the display backlight to be activated even when the battery is
relatively flat and the low battery indicator appears on the display. In this case, you should
be particularly aware that activating the display illumination decreases autonomy by
consuming energy.
4.3 Taking readings
The
PROLITE-20/21
has two meter modes: the Absolute Power Meter mode and the
Relative Power Meter mode.
4.3.1 Measuring Absolute Power
In this meter mode the instrument measures absolute power (in dBm) at the selected
wavelength.
To select this meter mode, access the configuration menu by keeping the rotary
selector pressed down a few seconds (until you hear a second beep). You will then see
the active meter mode:
Absolute Mode
in the case of Absolute Power Meter Mode or
Relative Mode
in the case of Relative Power Meter Mode. Select the absolute mode by
pressing the rotary selector ( Absolute Mode will appear on the display). Leave the
configuration menu by turning the rotary selector until Exit appears, then press the
selector to confirm.
The display will show the value corresponding to the measured power (in dBm) and
the wavelength (in nm) at which it is being measured.
The wavelength at which the absolute power is measured can be selected from those
available (ON state, see 4.2.3) by repeatedly pressing the rotary selector until it appears
on the display.