Zero Offset Adjustment of Light Function :
* For best results zero the light sensor prior to use in a
dark environment. Placing the light sensor end of the
meter under a desktop or flat surface so as to block
any light can accomplish this. Then press the
" Unit/Zero Button " ( 3-4, fig. 1 ) to set the meter
indication to zero.
* Zero point can drift due to environment temperature
and battery power change as well as for other reasons.
It is recommended that the zero be checked
frequently using the above procedure.
* Zero adjustment only can be executed if the lmeasurement
Light value 20 Lux.
≦
4-5 AIR FLOW (CFM. CMM) MEASUREMENT
1) Power on the instrument by pressing the " ON
Button " (3-1, Fig. 1).
2) Select the Air Flow function by pressing
" Function Button " ( 3-6, Fig. 1 ) until the display show
unit of CMM or CMM.
* Air flow unit " CFM " or " CMM " can be select by
pressing the " CFM/CMM Button " ( 3-4, Fig. 1 )
* Area size can be set by by pressing the " Area-Set
Button " ( 3-5, Fig. 1 ), then use the
Button ( 3-5, Fig. 1 )
▲
Button ( 3-6, Fig. 1 )
▼
Button ( 3-4, Fig. 1 )
to select the desired area size.
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