CEN-TECH 98674, Operation Manual, Page: 23 / 27

DIGITAL MULTIMETER
OPERATING INSTRUCTION
NOTE:
1
）
When only ‘OL’ appears on the LCD, it means
over-range and a higher range should be selected.
2
）
Spectral sensitivity characteristic:
20
400
80
60
40
100
900 600 500 800 700 1000
R
el
at
iv
e
S
en
si
tiv
ity
(
%
)
Wave Length (nm)
3
）
Recommended luminance:
Location Lux
Home
wardrobe, bedroom, lavatory, 70~150
staircase, corridor 70~150
living-room, study, toilet, kitchen 200 ~ 750
writing, working 500~1000
handicraft, dressmaking work 750~2000
Office
conference room, reception room 200 ~ 750
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DIGITAL MULTIMETER
OPERATING INSTRUCTION
clerical work 700 ~ 1,500
typing 1000 ~ 2,000
Factory
packing, passage 150 ~ 300
assembly line 300 ~ 750
inspection work 750 ~ 1,500
electronic parts assembly line 1,500 ~ 3,000
Hotel
public places, washroom 100 ~ 200
reception, front desk 200 ~1,000
Shop
staircase, corridor 150 ~ 200
display window, packing bench 750 ~ 1,500
shop window 1,500 ~ 3,000
Hospital
ward, warehouse 100 ~ 200
medical examination room 300 ~ 750
operation theatre, A&E ward 750 ~ 1,500
School
auditorium, indoor gymnasium 100 ~ 300
classroom 200 ~ 750
laboratory, library 500 ~ 1,500
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