PST Center 326 User manual

ANSI S1.40 - 1984
IEC 60942 Class 2
114dB
94dB
OFF
Sound Level Calibrator
326

326-00 OCT. 2003

CONTENTS
Title Page
1. Safety Information………………………….. 1
Environment Conditions………………………………….1
Maintenance & Clearing………………………………….1
Safety symbols…………………………………………… 1
2. Description ……………….….……………… 2
3. Features……………………..…..…………….2
4. Specifications………..……..……………….. 2
Output sound pressure levels…………………………... 2
Output frequency………………………………………….2
Reference conditions……………………………………..2
Influence of ambient conditions………………………… 2
Total Harmonic Distortion(THD)…………………………2
Accuracy of sound pressure level……………………… 2
Power……………………………………………………… 2
Battery life………………………………………………….2
Battery test ………………………………………………..3
Dimensions……………………………………………….. 3
Weight……………………………………………………...3
Ambient conditions………………………………………. 3
Storage temperature & humidity………………………...3
Accessories………………………………………………..3
5. Nomenclature And Function.……………... 4
6. Operating Preparation…….….……………. 5
7. Calibration Procedure….…….……………..5

Sound Level Calibration
1
1. Safety Information
Read the following safety information carefully
before attempting to operate or service the meter.
Use the meter only as specified in this manual;
otherwise, the protection provided by the meter
may be impaired.
Environment Conditions
Altitude up to 2000 meters
Relative humidity 90% max.
Operation Ambient 0 to 40

Sound Level Calibration
2
3. Features
Conforms to ANSI S1.4-1984 and IEC
60942-2003 Class 2.
Calibration levels of 94dB and 114dB.
Fit 1 inch and 1/2 inch diameter microphone.
4. Specifications
Output sound pressure levels:
94dB and 114dB re 20 uPa under reference
conditions.
Output frequency: 1000Hz +/- 2%
Reference conditions:
Temperature :23

Sound Level Calibration
3
Calibrator will not be operated when green LED
turns to red LED, which means that battery
voltage falls bellow acceptable range.
Dimensions:
113(L)x63(W)x44(H)mm,4.4(L)x2.4(W)x1.7(H)inch
Weight: approx. 170g(including battery)
Ambient conditions:
0 – 40

Sound Level Calibration
4
5. Nomenclature And Functions
cPower and low battery indicate LED.
dPower and output level select switch.
eTransducer assembly 1-inch cavity for
microphone insertion.
f1/2-inch microphone adapter.
gBattery cover.
94dB
114dB
ANSI S1.40 - 1984
IEC 60942 Class 2
OFF
NEDA 1604
9V BATTERY
6F22 , 006P
1
2
3
4
5

Sound Level Calibration
5
6. Operating Preparation
(1) Remove battery cover and install a 9V Battery in
the battery compartment.
(2)To quickly check the operation of the sound level
calibrator.
Before using it, proceed as follows:
(a)Turn the power switch from OFF to the 94dB
position. The user can start to operate it when
LED indicates the green light. If no, please
replace the battery.
(b)Change the switch from 94dB to 114dB, the
20dB increase in level. You can calibrate in noisy
environments and check linearity.
7. Calibration Procedure
(1)The cavity of the calibrator will accommodate 1-inch
microphone.
(2)When the calibration is performed to a instrument
with 1/2-inch microphone, the 1/2-inch microphone
adaptor will have to be inserted by gently pushing
it into the cavity till the end.
(3)Place the sound level calibrator over the microphone
of the sound measuring instrument being calibrated.
ANSI S1.40 - 1984
IEC 60942 Class 2
114dB
94dB
OFF
Lo = 30 80 dB
Med=
Hi =
POWER-UP OPTIONS
Auto=
100dB 130dB 130dB
50 80 30
MAX
CLOCK
REC
MIN
LEVEL
SLOW
INTV
FAST
SETUP
C
A

Sound Level Calibration
6
(4)On the instrument under test, set the level range
control to the range having 100dB as its upper
limit if 94dB was selected on the sound level
calibrator. If 114dB was selected on the sound
level calibrator, choose a range with on upper
limit of 120dB. The instrument may be set to
FAST or SLOW response and C or A weighting.
(5)Read the level on the instrument under test and
adjust the sensitivity control for the correct
indication of the sound level calibrator level
selected in step.
(6)When the calibrator is not worked, please switch
OFF the power to save the battery.
CAUTION!
Ambient sources of noise or vibration can
cause a false calibration indication, this can be
especially signification at the lower 84dB level.

CENTER TECHNOLOGY CORP.
4 / F NO. 415, Jung-Jeng Rd., 238 Shu-Lin, Taipei, Taiwan
E-Mail : [email protected]
http : / / www.centertek.com
326-00
Authorized Distributor in Australia
Pacific Sensor Technologies Pty Ltd
Unit 4, 3 Neutron Place Rowville, VIC 3178 Australia
1300 662 720 | [email protected]
www.pacificsensortech.com.au