General Tools and Instruments DLM105HA - Manual (Page 7)

4. MEASURING PROCEDURE
(1) Push the "Power Off/On Button"(3-2, Fig. 1) to
switch the instrument on.
(2) Zero Adjust Procedures
* Cover the Light Sensor(3-12, Fig, 1) using the Sensor
Cover provided (3-13, Fig. 1).
* Slide the "Range Switch"(3-11, Fig. 1) to the 2000
LUX position.
* Push the "Zero Button"(3-9, Fig. 1), then display will
show zero values.
* Upon completion, remove the sensor cover.
(2) Select the desired measuring unit by pressing the
"LUX/FC Button"(3-4, Fig. 1). The display will indicate
the selected unit of "LUX" or "Ft-cd".
(3) Determine the lighting type (Daylight, Tungsten,
Fluorescent or Mercury lamp) by pressing the
"Light Source Select Button"(3-8, Fig. 1)
* The LCD will indicate the selected lighting type using
the following symbols :
L = Tungsten, F = Fluorescent
S = Day Light, C = Mercury
(4) Select the max. range using the "Range Switch"(3-11,
Fig. 1).
* If the display shows "- - - - ", it indicates an
overload condition, select the next higher range.
* If the display shows "_ _ _ _ ", it indicates an
out-of-range, select the next lower range.
(5) Position the Light Sensor(3-12, Fig. 1) directly
under the light source.
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