ATP Instrumentation IEC61672-1 CLASS2 User manual

User's Manual
Professional Sound Level Meter
Please read this user manual thoroughly before using this unit
and keep it properly for yourfuture reference.

Contents
1. Safety.......................................................................... 1
2. General Description.................................................... 2
3. Specifications ............................................................. 3
4. Meter Description....................................................... 5
5. LCD Display Description........................................... 7
6. Operation Instructions ................................................ 8
7. Calibration Procedure............................................. 155
8. Basic Operation...................................................... 166
9. Operating Procedures ............................................. 177
10. Software Installation............................................. 188
11. Software Interface................................................. 199
12. Operation.............................................................. 266
13. Notes..................................................................... 277
14. Accessories........................................................... 288

1
1. Safety
Read the following safety information carefully before attempting
to operate the meter.
Use the meter only as specified in this manual; otherwise, the
warranty may be invalidated.
◆Environment conditions:
Altitude up to 2000 meters
RH≤90％（Non-Condensation）
Operating Temperature: -20～60℃
◆Maintenance
Repairs or servicing should only be performed by ATP
Instrumentation Ltd
Wipe the unit with a dry soft cloth. Do not use abrasives or
solvents on this instrument.
◆Safety Symbol
Comply with EMC

2. General Description
This Sound Level Meter is designed to meet the measurement
requirements of safety engineers, health, industrial safety offices
and sound quality control in various environments like
construction, factories, schools, offices, traffic access, household,
stereos, etc.
◆Comply with IEC61672-1 CLASS2 standard
◆Max/Min record
◆Over range indication
◆Under range indication
◆Time, data transmission display
◆A& C Weighting
◆Selectable response time: FAST/SLOW
◆Analog AC/DC outputs for connection to frequency analyzer or
X-Y shaft recorder
◆PC real-time monitoring, recording and memory
◆4digits LCD display with a resolution of 0.1dB
◆Sampling time: 2 times/second.

3. Specifications
Applied standard IEC61672-1 CLASS2
Accuracy ±1.4dB
Frequency range 31.5Hz～8kHz
Dynamic range 50dB
Measuring level
range
Lo：30dB～80dB
Med：50dB～100dB
Hi：80dB～130dB
Auto:30dB～130dB
Frequency
weighting A & C
Time weighting: FAST 125ms;SLOW ( 1s )
Microphone 1/2 inch electret condenser microphone
Display 4digits LCD display with a resolution of
0.1dB
Sampling time 2 times/sec
Max Hold MAX
Min Hold MIN
HOLD: Hold the readings
Alarm function
“OVER” is when input is more than upper
limit of range.
“UNDER” is when input is less than lower
limit of range.

Analog output
AC/DC outputs from earphone outlet
AC=1Vrms ，DC=10mV/dB
Data recording: Meter memory：262100 readings
Auto power off
Meter automatically shuts down after
approx. 15 minutes inactivity (auto power
off is disabled in recording mode)
Power supply One 9V battery
Battery life at least 30 hours
Operating
conditions -20~60; 10％RH～90％RH
Storage conditions -20℃～60℃; 10％RH～75％RH
Dimension
(L*W*H) 252*66 *33 mm
Weight: 262g

4. Meter Description
①Wind Muffler
②Microphone
③LCD display
④Frequency weighting A/C selection key
⑤Backlight ON/OFF key
⑥HOLD key
⑦Range selection key
⑧Power ON/OFF key
⑨MAX/MIN key
⑩Response time selection key
⑪SET key

⑫Potentiometer calibration
⑬AC/DC signal output earphone outlet
⑭USB interface
⑮External DC 9V power supply terminal
⑯Dustproof cover
⑰4mm camera bush for tripod mounting
⑱Battery Compartment

5. LCD display description
Icon Function
LCD 4 digits
MAX Maximum data hold
MIN Minimum data hold
OVER Input value is more than upper limit of range.
UNDER Input value is less than lower limit of range.
FAST Fast response
SLOW Slow response
dBA Afrequency weighting(the noise that human ear can hear)
dBC C frequency weighting (response to machine monitor)
TIME Display current time(Hour-Minute-Second)
DATE Display current date(Year-Month-Day)
AUTO Auto level range selection
HOLD Data hold function
REC Data recording
Full Memory is up to limitation
Auto power off
Low battery indication
Real-time communication icon: it flashes when the meter is
connected with PC to achieve data transmission.

6. Operation Instructions
(1) Frequency weighting selection:
Press " " key to select Aor C.
(2) Backlight:
After turning the meter on, press " " key, the backlit will turn
on. It will automatically turn off after approx. 30 seconds of no
activity or you can press " "key again to disable the backlight
before 30secs.
(3) HOLD:
After turning the meter on, press " " button, "HOLD" icon
will appear on the bottom right hand corner of the LCD display,
which indicates the data is frozen. To release the held reading,
press the " ” button again.

(4) Level range selection:
Press “ ” key, the level range will change from ‘Lo’, ‘Med’,
‘Hi’to ‘Auto’ level.
(5) Power on/off:
Press the" " key for 1 second to turn the meter on. Press and
hold " " key for approx. 3 seconds to turn the meter off.
(6) MAX/MIN
Press the " " key once to enter MAX measurement. ‘MAX’
will appear on the top left hand corner of the LCD display. The
captured maximum sound level will be displayed. Press the " "
key again, ‘MIN’ will appear on the top left hand corner of the
LCD display and the minimum sound level will be displayed.
Press the " " button one more time to exit MAX/MIN
measurement mode.

(7) FAST/SLOW
Press “ ” to select FAST or SLOW time weighting
measurement.
FAST: Fast sampling measurement, 1 time per 125ms.
SLOW: Slow sampling measurement, 1 time per second.
(8) Date & Time Set
(8.1) While the meter is turned off, press and hold the " " key
and keep " " held while turning the meter on. Release the
" " key when the meter has powered on. The year data, next
to the DATE will flash to indicate you have entered the Date &
Time Set mode. The date is displayed as YEAR-MONTH-DAY,
see fig. as below:
When the YEAR data flashes continuously, press "▲" key to
increase the value or press the "▼" key to decrease the value. See

fig.as below:
Press " ", the MONTH data will flash continuously, then press
“▲” or “▼” to increase or decrease the value. See fig. as below:
Press " " again, the DAY data will flash continuously, then
press "▲" or "▼" to increase or decrease the value. See fig.as
below:
Press " " for the fourth time, the TIME icon appears and
HOUR data flashes, press "▲" or "▼" to increase or decrease the
value. See fig.as below:

Press " " for the fifth time, the MINUTE data flash, then press
“▲” or “▼” to increase or decrease the value. See fig.as below:
When Date & Time set is complete press "HOLD" key to save the
data and exit this mode.
(8.2 )TIME/DATE Display
Turn the meter on and press " " key once time to change
between TIME and DATE display.
(8.3) REC recording function
Hold the " " key for 3 seconds until "REC" appears on the
LCD display. The meter will start recording automatically
according to the set sampling rate. When the memory is full, the

word "Full" will appear on LCD and the meter will stop recording
automatically. The meter will restart recording after the memory
data is cleared.
During recording, hold the " " key for 3 seconds to exit
recording mode.
Note: Adapter must be connected and the battery removed for
long periods of recording to avoid the meter shutting down
suddenly and the recorded data lost.
(9) AC/DC Signal Output Earphone Outlet
AC: Output voltage: 1Vrms corresponding to each range step.
Output impedance: 100Ω
DC: Output voltage: 10mv/dB
Output impedance：approx.1KΩ

(10) External power supply:
DC 9V input
External DC 9V, positive inside and negative outside
Pore size：OD 3.5mm, ID 1.35mm

7. Calibration Procedure
(1) Turn the meter on and select the following:
a) Frequency weighting:A-weighting
b) Time weighting: FAST
c) Level range: 50 ~100dB
(2) Insert the microphone housing carefully into the 1/2 inch
insertion hole of the calibrator（94dB @ 1kHZ. (ATP do not sell
acoustic calibrators and this instrument does not come with
one)
(3) Turn the calibrator on and adjust the CALL potentiometer
(using the screwdriver provided with this meter) until 94.0dB is
displayed.

The recommended recalibration cycle is one year.
8. Basic Operation
(1) Open battery cover and install a 9-volt battery into the battery
compartment.
(2) Close the battery compartment.
(3) When the low battery icon " " appears, replace the
battery.
(4) When the AC adapter is used, insert the plug of the adapter
（3.5φ）into the DC 9V connector on the side panel and you must
remove the 9V battery.
Note: If the adapter and battery are used at the same time the
warranty is invalid.

9. Operating Procedures
(1) Power on the meter.
(2) Press ‘ ’ button to select the desired level range.
(3) Select ‘dBA’ for general noise sound level and ‘dBC’ for
measuring sound level of acoustic material.
(4) Select ‘FAST’ for instant sound and ‘SLOW’ for average
sound level.
(5) Select ‘ ’ button for measuring maximum and minimum
noise level.
(6) Hold the meter in your hand or use a tripod (sold separately)
to fix the meter in the desired location. The best measuring
distance is 1~1.5m away from the microphone to the sound
source.
(7) To view the current time or date, press the " " key:

10. Software Installation
Insert the CD into the CD-drive. The software will run the setup
file, follow the installation tips to install the PC professional
software; if the software cannot run the setup file directly, open
the CD contents, double-click the file and follow
the installation tips to install the software.