3
5. Point the meter directly at the uV tubes and
press button S
once. the meter will
monitor the uV, subtract the previous ambient reading, and display the fly trap uV
reading by illuminating one of the 10 coloured Leds, Fig 2.
if a continuous assessment of uV is required, perform operation 5 but hold the
button down continuously. releasing the button stores the last reading.
Fig. 2 LED reading -
the moving bar of Led lights change colour according to the
condition of the tubes. the further to the right the Led display moves the more uV
output.
Green -
right 4 Leds good - satisfactory
Yellow -
centre Leds Marginal output - approaching renewal
Red -
left 3 Leds inadequate - bulbs should be replaced
the illuminated Led will remain on without the need to hold any buttons until the
meter powers down. this happens automatically 20-30 seconds after the last press
of any button.
b.
Assessing ambient UVA levels -
when surveying a site prior to the
installation of fly control units, ambient uV levels should be measured to
prevent poor trap location to select appropriate wattage fly traps.
1.
Press either button A or S
to turn meter on - the red Led on the far left will
blink on and off.
2.
Cover/hide the front aperture
of the uV-a meter and
press button A.
this will store a zero reading.
3. with the meter pointing in general direction for siting
press button S
.
the meter will now indicate the actual level of uV light according to how far to
the right the display reads, Fig 2.
4. choose the optimum location for siting of a fly trap by choosing a place with the
lowest ambient light reading
i.e. the measurement which is furthest to the
left in the red zone.
note that: if you are unable to find a low ambient light reading a higher wattage fly
