1.FEATURES
2. SPECIFICATIONS
3. FRONT PANEL DESCRIPTIONS
4. MEASURING PROCEDURE
5. STORING AND
RECALLING READINGS
6. HOW TO SET THE LEQ TIME
7.
8.HOW TO SET THE TIME OF
AUTO POWER OFF
9. CALIBRATION
10.CONSIDERATIONS
11.BATTERY REPLACEMENT
HOW TO SET THE ALARM VALUE
TABLE OF CONTENTS
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2.SPECIFICATIONS
Display:14mm (0.55
＂
) LCD with backlight
Parameters measured: Lp, Lmax, Leq , L
N
.
Measurement range:
Lp: 30~130dB (A)
35~130dB (C)
35~130 dB (F)
Leq: 30-130dB (10s, 1min, 5min,
10min, 15min, 30min
,
1hour,
8hour, 24hour)
L
N
: 0-100%
Resolution: 0.1 dB
Accuracy:
±
1dB
Frequency weighting:'A', 'C', 'F' (Flat)
Time weighting :Fast (125ms)
Slow (1 second)
Microphone:1/2 inch electret condenser type
Memory: 30 groups with measuring
conditions
Built in calibration signal: 94dB at 1kHz
(sinusoidal)
Frequency range: 20 to 12,500 Hz
Alarm value set: 30-130 dB
Alarm output: LED and optional relay
contact (NC)
PC interface: RS232C
Low battery indication
Power supply: 4x1.5v AAA (UM-4
battery)
2
inside.
11.BATTERY REPLACEMENT
11.1 When battery voltage less than approx. 5v, it
is necessary to replace the batteries.
11.2 Install a the batteries 4x1.5v AAA (UM-4)
correctly into the case.
11.3 If the instrument is not to be used for any
extended period, remove batteries.
Note: If AC adapter is used, batteries should be
taken away.
9
7
the period of measurement time, just press
for about 8 seconds till "Leq" is on the
display, release the key, then select the set
time among 10s, 1min, 5min, 10min, 15min,
30min, 1hour, 8hour, 24hour by depressing
Up or Down key. To quit, just depress any
key except or key.
The alarm LED is on when the instant
measurement value is larger than or equal to
the alarm value set. The default setting value
at the factory is 85dB. Users can change it to
any value between 30-130dB by following
steps. Depress for about 5 seconds,
release it after "AL" shows on display, then
press key or key to preset the alarm
value as desired. To quit, just depress any
key except or key.
8.
HOW TO SET THE TIME OF AUTO POWER OFF
The default setting for auto power off at the
factory is 5 minutes. That means the meter
will auto power off 5 minutes from the time
of last key operation. Users can change it to
any value between 1-9 minutes by following
steps. Depress for about 10 seconds,
release it after "AU
Г
O" shows on display,
then press or key to preset the time as
desired. To disable the function of auto
power off, just preset the time to 0. It will
7.HOW TO SET THE ALARM VALUE?
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