General Tools and Instruments DLM204 - Manual (Page 6)

OPERATING INSTRUCTIONS
To power the meter on or off, press the green button.
Before making any measurements, remove the cap covering
the light sensor (Callout 7). Do not detach the cap from the
lanyard.
Begin by selecting a measurement unit—lux or foot-candles.
Pressing the Lx/Fc button (Callout 4) toggles between the two
units. When the DLM204 powers on, it automatically resumes
using the last unit selected. In other words, whichever
measurement unit you select becomes the meter’s default
unit until you change it.
To make an initial measurement, position the meter so the
light sensor is as close to perpendicular to the source of light
as possible.
If your reading is OL. or OL, there is enough light to overload
the meter using its current measurement range. You must
switch to a wider measurement range.
CHOOSING THE RIGHT RANGE
The DLM204 provides four manually selectable ranges for
each of the two measurement units: lux and foot-candles
(FC). Repeated presses of the R button (Callout 6) cycle
through the four ranges for each unit. The following two
graphics illustrate the sequence.
20
Ǡ
200
Ǡ
2000
Ǡ
20000
 FC
and
200
Ǡ
2000
Ǡ
20000
Ǡ
200000
 LUX
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