3
4
4
.
.
N
N
A
A
M
M
E
E
O
O
F
F
P
P
A
A
R
R
T
T
S
S
A
A
N
N
D
D
P
P
O
O
S
S
I
I
T
T
I
I
O
O
N
N
S
S
6
8
3
5
2
1
D-H
9
7
4
10
1. LCD display
：
4-digit dual display, each with a maximum
reading of 5000, annunciators for measured
values, unit functions and decimal points etc.
2.
Power button
：
The power button turns the instrument
ON or OFF.
3.
AVG button
: Activates the point-average mode.
4.
H
Data-hold button
: Freeze or unfreeze the displayed
readings.
5. cd button
: Enter luminous intensity mode.
6.
button
: Scroll to a setting mode, or increase or
decrease the displayed setting value.
