External DC power supply: 6 V DC, 100mA
Size: 236x63x26 mm / 9.3x2.5x1.0inch
Weight: 170g (including batteries)
Standard delivery:
1.Main Unit
2.Carrying Case
3.Operation Manual
4.Windscreen
Optional Accessories:
1. ND9 sound level meter calibrator
2. Cable and software for RS232C
3. External relay
4. AC adapter
3.FRONT PANEL DESCRIPTIONS
1pc
1pc
1pc
1pc
...........................
. . . . . . ....... . . . . . ...
.........
..
......
......... ................
3
M
C
AL
R
FA
ST
SLO
W
Lp
Le
q
L
N
B
d
ax
m
3-4
3-5
3-6
3-7
3-10
3-1
3-2
3-3
3-8
3-9
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-10
3-8
3-9
Calibration Mark
Time Weighting
Function Mark
Battery indicator
Max Hold
Number Memorized
Browsing Icon
Memory state
Weighting Icon
Mark for L
N
6
5.STORING AND RECALLING READINGS
5.1 When in state, you can save the reading
together with measuring conditions to the
memory of the meter by pressing the key.
Then the icon changes to 'M' automatically
while the number of memorized readings
increases 1.
5.2 No matter in state or 'M' state, the
memorized data can be browsed by depressing
the key. The browsing state is marked in
'R' on display. When in 'R' state, all the
readings memorized can be recalled by
depressing the key or key.
5.3 To delete the memorized value in memory,
just enter the browsing state and locate the
reading to be deleted by the key or
key, then depress the key. If there is an
"Err0" on the display, it indicates there is no
reading to delete any more.
6.HOW TO SET THE LEQ TIME?
Leq is used to assess the rms average noise
level over a preset period of time, often the
starting point of a noise assessment. To take a
Leq measurement , the period of time over
which it is to be made must be selected. The
longer the period of measurement time, the
more accurate the Leq reading will be. To set
M
` `
SAVE
M
` `
M
` `
READ
SAVE
READ
READ
SAVE
MENU
DEL
SLOW
FAST
3-11
3-12
3-13
3-14
3-15
3-16
3-17
3-18
3-19
3-20
3-21
3-22
3-23
3-24
3-25
3-26
3-11 Microphone
3-12 Display
3-13 Alarm LED
3-14 Weighting key
3-15 Fast /Slow key
3-16 Up/Save key
3-17 Down/Read key
3-18 Function key
3-19 Max hold key
3-20 Power key
3-21 Delete/Menu
3-22 Cal adjusting
3-23 Jack for RS-232C
interface
3-24Jack for output
3-25 Jack for AC
3-26 Battery
Compartment/Cover
4.MEASURING PROCEDURE
4.1Press the key (Fig.1, 3-20) and release to
switch on the power.
4.2Check whether the function selected is right.
If not, change it by depressing the key.
The default setting is Lp, weighting A, Fast.
Lp - current sound pressure level
Leq- Equivalent Continuous A Sound
pressure Level, i.e. Arithmetically
mean value in a period of time set.
L
N
- Statistic analysis, i.e. What percent of
all measurement values are larger
than or equal to the alarm value
set by the user. For setting the alarm
value, please see page 7.
4.3 Check whether the weighting is right. If not,
change it by depressing the key to select
'A', '
C
' or 'Flat'.
With 'A' weighting selected, the frequency
response of the meter is similar to the
response of the human ear. 'A' weighting is
commonly used for environmental or hearing
c o n s e r v a t i o n p r o g r a m s s u c h a s O S H A
regulatory testing and noise Ordinance law .
'C' weighting is a much flatter response and
is suitable for the sound level analysis of
machines, engines, etc.
NOTE: Weighting 'A' will be automatically
selected when measuring Leq.
4.4 Use the key to select a Fast (125 ms) or a
Slow (1 second) response time. Select Fast to
capture noise peaks and noises that occur very
quickly. Select the Slow response to monitor a
sound source that has a consistent noise level
or to average quickly changing levels. Select
Slow response for most applications.
4.5 The reading is the peak one if the icon `max`
appears on the Display. The reading is an
instant value if `max` does not show up. The
appearance of symbol `max` is controlled by
depressing the key in the process of
measurement.
MAX HOLD
WEIGHTING
4
5
FUNCTION
