PCE Americas PCE-428, PCE-430, PCE-432 User Manual

User Manual

Sound Level Meter

PCE-428
PCE-430
PCE-432

PCE Americas Inc.
711 Commerce Way
Suite 8
Jupiter
FL-33458
USA
From outside US: +1
Tel: [phone]
Fax: [phone]
[e-mail]

www.pce-instruments.com/english

www.pce-instruments.com

PCE Instruments UK Ltd.

Southpoint Business Park

Hampshire / Southampton

United Kingdom, SO31 4RF

[e-mail]

Units 12/13

Ensign way

From outside UK: +44

Tel: [phone]

Fax: [phone]

Contents

PCE-428 / 430 / 432

Contents ......................................................................................................................... 2

Appearance .................................................................................................................... 6

Buttons of Operation ....................................................................................................... 7

1. Introduction ................................................................................................................. 8

1.1 General Description ................................................................................................. 8

1.2 Applications ............................................................................................................. 8

1.3 Features .................................................................................................................. 8

1.4 Function Upgrades .................................................................................................. 9

1.5 Spectification ........................................................................................................... 9

1.6 Information for Periodic Tests ................................................................................ 12

1.7 Key Component .................................................................................................... 13

1.8 Packing List ........................................................................................................... 13

1.9 Packing Drawing ................................................................................................... 14

2. The Appearance and Operation................................................................................. 19

2.1 Keypad.................................................................................................................. 19

2.2 Microphone Connector .......................................................................................... 20

2.3 Windscreen ........................................................................................................... 21

2.4 Data and Power Supply Connector ........................................................................ 22

2.5 Battery .................................................................................................................. 23

2.6 GPS ...................................................................................................................... 24

3. Measurement Screen ................................................................................................ 26

3.1 Icons and Meaning of Screen Display .................................................................... 26

3.2 Screen of Level Meter Mode .................................................................................. 28

3.3 Screen of 1/1 Octave Mode ................................................................................... 30

2

3.4 Screen of 1/3 Octave Mode ................................................................................... 30

PCE-428 / 430 / 432

4. Operation and Setting of the Menu ............................................................................ 32

4.1 Function ................................................................................................................ 32

4.2 Calibration ............................................................................................................. 33

4.2.1 Calibration by Measurement ............................................................................. 33

4.2.2 Calibration by Cal.Factor .................................................................................. 33

4.2.3 Conversion of Cal.Factor and Sensitivity ........................................................... 33

4.2.4 Process of Calibration by Measurement ............................................................ 34

4.3 Measurement ........................................................................................................ 36

4.3.1 MEAS.Setup ..................................................................................................... 36

4.3.2 MEAS.Range .................................................................................................... 38

4.3.3 ICCP Power ...................................................................................................... 39

4.3.4 Profile 1~3 ........................................................................................................ 39

4.3.5 Alarm Threshold ............................................................................................... 40

4.3.6 Extended Function ............................................................................................ 40

4.3.7 Statistical .......................................................................................................... 40

4.3.8 Time History ..................................................................................................... 41

4.3.9 Octave .............................................................................................................. 41

4.3.10 Custom Measure ............................................................................................ 41

4.3.11 Timer .............................................................................................................. 42

4.3.12 24h Measurement by Timer ............................................................................ 43

4.4 Setup .................................................................................................................... 44

4.4.1 Contrast............................................................................................................ 44

4.4.2 Backlight ........................................................................................................... 44

4.4.3 Battery .............................................................................................................. 44

4.4.4 Trigger .............................................................................................................. 45

4.4.5 Date & Time ...................................................................................................... 45

4.4.6 Auto PWR Off ................................................................................................... 47

4.4.7 RS-232 ............................................................................................................. 47

4.4.8 File Manager .................................................................................................... 48

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4.4.9 Boot Mode ........................................................................................................ 49

PCE-428 / 430 / 432

4.4.10 USB Mode ...................................................................................................... 50

4.4.11 GPS ................................................................................................................ 51

4.4.12 Setup Template ............................................................................................... 51

4.4.13 About .............................................................................................................. 52

4.5 Language .............................................................................................................. 52

4.6 Output ................................................................................................................... 52

4.6.1 AC OUT ............................................................................................................ 52

4.6.2 DC OUT ........................................................................................................... 53

4.6.3 Printer .............................................................................................................. 53

4.7 Factory Settings .................................................................................................... 54

5. RS-232 Communication Protocol .............................................................................. 55

5.1 Hardware Configuration and Settings of Interface .................................................. 55

5.2 Transfer Protocol ................................................................................................... 55

5.2.1 Start/Stop of the Block Transfer ........................................................................ 56

5.2.2 Device ID .......................................................................................................... 56

5.2.3 ATTR Attribute Character .................................................................................. 56

5.2.4 BCC (Block Check Character)........................................................................... 57

5.2.5 Block Transfer Format....................................................................................... 57

5.2.6 Recovery from Transmission Errors .................................................................. 58

5.2.7 Flow Control ..................................................................................................... 59

5.2.8 Multi-Machine Operation ................................................................................... 59

5.2.9 Rated Parameters ............................................................................................ 60

5.3 Instruction ............................................................................................................. 60

5.3.1 Instruction List .................................................................................................. 62

5.3.2 Instruction Format ............................................................................................. 65

5.3.3 Instruction Describe .......................................................................................... 66

6. Operation Notes ...................................................................................................... 100

6.1 Operation ............................................................................................................ 100

6.2 Common Issue And Solutions .............................................................................. 100

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6.3 Calibration ........................................................................................................... 101

PCE-428 / 430 / 432

6.4 Firmware Update ................................................................................................. 101

6.4.1 Install USB Driver ........................................................................................... 101

6.4.2 Firmware Update Procedure ........................................................................... 102

6.5 Warranty ............................................................................................................. 103

6.6 Customer Service Phone Number ....................................................................... 104

Annex 1 Glossary ....................................................................................................... 105

Annex 2 Adjustments at the Calibration Check Frequency ........................................... 107

Annex 3 Corrections for the Typical Effects of Reflections from the Case of Sound Level

Meter and Diffraction of Sound around the Microphone ................................. 108

Annex 4 Corrections of Windscreen in Free Field ........................................................ 109

Annex 5 Corrections of Electrostatic Actuator .............................................................. 110

Annex 6 Typical Frequency Response and Corresponding Upper Limit ........................ 111

Annex 7 Specification of 1/1 Octave Band Filter .......................................................... 112

Annex 8 Specification of 1/3 Octave Band Filter .......................................................... 113

Annex 9 Mid-band Frequencies for 1/1 Octave Band and 1/3 Octave Band Filters ....... 116

5

Appearance

PCE-428 / 430 / 432

-

Buttons of Operation

LED indicator

<Power>

LCD Screen

<ESC>

<Enter>

Arrow keys

<▲><▼>

<◄><►>

<Menu>

<Start/Stop>

<Backlight>

PCE-428 / 430 / 432

7

1. Introduction

PCE-428 / 430 / 432

1.1 General Description

The new PCE-428/430/432 are new generation octave sound level meter upgrade from base

PCE-428/430/432 to meet the market demand. It fulfill the 1/1 octave requirement of IEC

standard and China GB/T standard.
The PCE-428/430/432 is a digital sound level meter which design and manufacture by 3&(.

The use of high precision 24 Bits AD converter makes the instruments to be an ideal choice

for performing many kinds of measurement, for example, environmental noise, vehicle noise

and industrial application.

The new types upgrade the dual-core (DSP+ARM) architecture to single chip ARM with float

point unit, and update all fix-point calculation to float-point which significantly improves the

accuracy and stability. Re-design analog front end circuit also lower the noise floor and linear

range of product. The new developed algorithm brings a single measurement range which

can cover more than 120dB dynamic range while still meets the standard.

PCE-430/432 is Class 1 and PCE-428 is Class 2. Both instruments have certificated by the

China CPA (Certification of Pattern Approval) and CMC (China Metrology Certification).

1.2 Applications

 Basic noise measurement

 Environmental noise assessment

 Product quality check

 Evaluation of noise reduction engineering

1.3 Features

 Class 1 (PCE-430/432) and Class 2 (PCE-428)

sound level meter

 Comply with IEC 61672-1:2013, ANSI S1.4-1983 and ANSI S1.43-1997

 Real-time 1/1 and 1/3 Octave in accordance with IEC 61260-1:2014 and ANSI S1.11-2004

 Linearity range: 22dBA~136dBA (PCE-430/432), 25dBA~136dBA (PCE-428)

 Single range to cover 123dB (PCE-430/432) / 122dB (PCE-428) dynamic range

 Frequency weighting: A/B/C/Z. Time weighting: Fast/Slow/Impulse

 3-Profile and 14 custom define measurement are calculate in parallel with different

8

frequency/time weighting

 Single chip high speed ARM with FPU

 USB port function implemented

 White backlight LCD

 Update firmware via USB (also power supply)

 Integral period from 1s~24h

 Timer feature support auto measurement

 0.1s, 0.2s, 0.5s logger step added

 Internal GPS (option) with GPS timing

 5 templates to save user setting

 Single range to cover 123dB dynamic range

 B-weighting added to for ANSI standard

 Reduce the noise floor (only for Class 1)

 Automatic power on with external

supply, ease of integration

 Upper limit of measurement:

136dBrms/139dBpeak (40mV/Pa)

Specifications

Type

Accuracy

Class 1 (Group X)

Class 2 (Group X)

Standard

GB/T 3785.1-2010, IEC 60651:1979, IEC 60804:2000

IEC 61672-1:2013, ANSI S1.4-1983, ANSI S1.43-1997

Octave1

Real-time 1/1 Octave: 8Hz~16kHz

Real-time 1/3 Octave (Option): 6.3Hz~20kHz

GB/T 3241-2010, IEC 61260-1:2014

ANSI S1.11-2004. Base 10 system.

Real-time 1/1 Octave: 20Hz~8kHz

Real-time 1/3 Octave (Option): 20Hz~12.5kHz

GB/T 3241-2010, IEC 61260-1:2014

ANSI S1.11-2004. Base 10 system.

PCE-428 / 430 / 432

 Calculate SPL, LEQ, Max, Min, Peak, SD, SEL, E

 LN statistical and time history curve display

 User define integral period measurement, integral period up to 24h

 High speed ARM core with FPU (Float Point Unit) to achieve wide frequency response,

large dynamic range and low noise floor

 4G MicroSD card (TF card) mass storage

 RS-232 remote control port

 Mini thermal printer for measurement data print

 Internal GPS module (option), support GPS timing

1.4 Function Upgrades

1.5 Spectification

PCE-430/432 PCE-428

9

Supplied

Microphone

MPA231T: 1/2” prepolarized

measurement microphone, Class

1. Sensitivity: 40mV/Pa. Frequency

Range: 3Hz~20kHz.

MPA309T: 1/2” prepolarized

measurement microphone, Class

2. Sensitivity: 40mV/Pa. Frequency

Range: 20Hz~12.5kHz.

Mic Interface

TNC connecter with ICCP power supply (4mA)

Detector / Filter

Fully float-point digital signal processing (digital detector and filter）

Integral Period

Infinite or 1s~24h user define integral period.

Repeat time: Infinite or 1~9999

Logger Step

0.1s, 0.2s, 0.5s, 1s~24h

Measurement

Functions

L

XY(SPL)

, L

Xeq

, L

XYSD

, L

XSEL

, LXE, L

XYmax

, L

XYmin

, L

XPeak

, L

XYN

. Where X is

the frequency weighting: A, B, C, Z; Y is time weighting: F, S, I; N is the

statistical percentage: 1~99. 3-Profile and 14 custom define

measurement are calculate in parallel with different frequency/time

weighting

24h Measurement

Automatic measurement based on user define date/time and save the

history data

Frequency

Weighting

Parallel A, B, C, Z (It can also be applied to 1/1 and 1/3 Octave)

Time Weighting

Parallel F, S, I and Peak detection

Self-Noise2

Sound: 19dB(A), 25dB(C), 31dB(Z)

Electrical: 13dB(A), 17dB(C), 24dB(Z)

Sound: 20dB(A), 26dB(C), 31dB(Z)

Electrical: 14dB(A), 19dB(C), 24dB(Z)

Upper Limit2

136dB(A)

Increase to 154dB(A) with 5mV/Pa

Microphone

136dB(A)

Increase to 154dB(A) with 5mV/Pa

Microphone

Frequency

Response1

10Hz~20kHz

20Hz~12.5kHz

Level Linearity

Range

2, 3, 4

22dB(A)~136dB(A)

Octave: 30dB~136dB

25dB(A)~136dB(A)

Octave: 33dB~136dB

Dynamic Range2

123dB (13dB(A)~136dB(A))

122dB (14dB(A)~136dB(A))

PCE-428 / 430 / 432

10

Peak C Range

2, 3

47dB~139dB

50dB~139dB

Electrical Input

Maximum input voltage: 5Vrms (7.07Vpeak). Input impedance of

preamplifier: >6GΩ

Range Setting

Single range to cover whole dynamic range

Resolution

24Bits

Sampling Rate

48kHz (Sampling interval for LN: 20ms)

Time History

Time domain noise curve display. Duration time: 1min, 2min, 10min

LCD Display

160x160 LCD with white backlight, 14 step contrast level, 1s display

update rate

Mass Storage

4G MicroSD card (TF card)

Post-Processing

Post-processing software VA-SLM can read, analyze and generate

reports of store data.

Export Data

Directly connect to the computer to read the memory card (USB disk)

Output

AC Output (max 5V

RMS

, ±15mA), DC Output (10mV/dB, max 15mA),

RS-232 serial interface and USB (USB disk mode or modem mode)

Alarm

User define alarm threshold. LED indicate the alarm status

Setup Template

5 templates to save user setup for different application, template can be

save in MicroSD card

Auto Power On

Automatic power on and start measurement when power supply

available, ease of integration

Power Supply

4x1.5V alkaline batteries (LR6/AA/AM3), sustainable use of approx.10

hours (depends on battery). It also can be supply by external DC power

(7V~14V 500mA) and USB power (5V 1A)

RTC

Built-in backup battery has been calibrated at factory to the error <26s in

30days (<10ppm, (25±16) ºC). It can keep RTC running when replacing

the main batteries.

GPS timing function available (option with GPS module)

Language

English, Chinese, Portuguese, Spanish, German, French

Firmware Update

Update firmware via USB port

PCE-428 / 430 / 432

11

Conditions

Temperature: -10ºC~50ºC. Humidity: 20%~90%RH

RT Temperature

Real-time temperature display on the main screen

Size (mm)

W70 x H300 x D36

Weight

Approx. 620g, including 4 alkaline batteries

Option

GPS

Receiver Type: 50 Channels; Time-To -First-Fix: Cold Start 27s, Warm

Start 27s, Hot Start 1s; Sensitivity: Tracking -161dBm, Reacquisition

-160dBm, Cold Start -147dBm, Hot Start -156dBm; Horizontal position

accuracy: 2.5m, Timing accuracy: 30ns, Velocity accuracy: 0.1m/s;

Update Rate: 1Hz, Operation Limits: Dynamic≤4g, Altitude<50000m,

Velocity<500m/s

Calibrator

CA111, Class 1, 94dB/114dB, 1kHz

Printer

Mini thermal or dot-matrix printer, RS-232 port

Note 1: Ignore the result outside 20Hz~12.5kHz for type PCE-428 alone due to microphone

frequency response of Class 2.

Note 3: Measurement according to GB/T 3785 and IEC 61672.

Note 4: Measurement according to GB/T 3241 and IEC 61260.

PCE-428 / 430 / 432

Note 2: The data was measured with 40mV/Pa microphone for PCE-430/432 and PCE-428.

1.6 Information for Periodic Tests

 Reference sound level: 94.0dB.

 Reference incidence direction: parallel to the incident direction of the microphone.

 Reference point of microphone: the central point of microphone diaphragm.

 Reference incidence direction: direction perpendicular to the microphone diaphragm.

 Reference attenuation of octave spectra: 0dB.

 Reference input signal level of octave spectra: 40mV (94dB for sensitivity of 40mV/Pa).

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1.7 Key Component

Component Name

Manufacturer

Type

Description

Microphone

MP231

Class 1 microphone

MP309

Class 2 microphone

No.

Type

Description

Standard

1

Sound level meter without microphone

2

CC308 Case

Carrying case

3

MA231T

ICCP preamplifier with TNC connector

4

MP231/MP309

Class 1 (308) or class 2 (309) microphone

5

WS002-9 Windscreen

90mm diameter windscreen for 1/2” microphone

6

MicroSD Card

4G memory card to store data

7

Battery

Alkaline battery (LR6 / AA / AM3) x 4

8

Power Adapter

Power adapter with 9V/500mA

9

MiniUSB Cable

Use to connect computer

10

Quick Start Guide

Quick start guide

11

Certificate of Calibration

Certificate of factory calibration

12

CD

Include post-process software, user manual (pdf), driver,

firmware and other utility

13

Certificate of Conformity

Certificate of conformity

Option

14

GPS

GPS module and antenna

15

Sound Calibrator

CA111: class 1 calibrator, 94dB/114dB

CA114: class 2 calibrator, 94dB

CA115: class 2 calibrator, 11 4dB

16

Thermal Printer

Mini thermal printer without ribbons, RS232 connector

17

Tripod

Stand for sound level meter

18

Printed User Manual

Printed user manual

19

Test Report

Test report from metrology institute

PCE-428 / 430 / 432

1.8 Packing List

PCE-428/430/432

3&(,QVWUXPHQWV

13

1.9 Packing Drawing

PCE-428 / 430 / 432

☆Note: The detail of packing items may vary to follow orders.

14

2. The Appearance and Operation

<Power>

<ESC>

<▲>

<Enter>

<◄> <▼> <►>

<Backlight>

<Menu>

<Start/Stop>

PCE-428 / 430 / 432

PCE-428/430/432 uses the same body and the keypad layout. LCD screen, keypad and LED

indicators lay on the front of instrument.

2.1 Keypad

Sound level meter has 10 keys, namely:

<Power>:

Long press 2 seconds of this key will power on the sound level meter. When sound level

meter keep in stop state, long press 2 seconds will trigger the shut-down-dialog-box, and

then press <Enter> to power off sound level meter.

☆Note: <Enter> is invalid when the sound level meter is running measurement.

<ESC>:

Exit the menu or return to previous menu. Press <ESC> also can clear the history curve

at the time history screen.

<Enter>:

Enter the menu of next level, or confirm the changes of the parameters, or save current

data as CSD format in stop state.

<Backlight>:

Press to open or close the LCD backlights. Backlight delay can be set in the menu. Refer

to 4.4.2 Backlight to earn more details.

19

<Start/Stop>:

PCE-428 / 430 / 432

Start or stop the measurement.

<▲>:

Up arrow used to select the menu item or adjust the parameters.

<▼>:

Down arrow used to select the menu item or adjust the parameters.

<◄>:

Left arrow used to select the menu item, or adjust the parameters, or switch measure

screens.

<►>:

Right arrow used to select the menu item, or adjust the parameters, or switch measure

screens.

<Menu>:

Press to enter the main menu list.

2.2 Microphone Connector

The TNC connector on the top of the sound level meter is used to connect to microphone and

preamplifier (microphone and preamplifier are usually mounted together). The TNC is

threaded coaxial connector.

PCE-430/432 is equipped with Class 1 microphone, while PCE-428 is equipped with Class 2:

MPA231T:

MPA309T:

20

1/2” pre-polarized measurement microphone, class 1. Sensitivity: 40mV/Pa. Frequency

range: 3Hz~20kHz. Mounted with ICCP preamplifier and powered by 4mA/24V.

1/2” pre-polarized measurement microphone, class 2. Sensitivity: 40mV/Pa. Frequency

range: 20Hz~12.5kHz. Mounted with ICCP preamplifier and powered by 4mA/24V.

Microphone and preamplifier are mounted together by thread. Unless special situation,

PCE-428 / 430 / 432

please do not separate each other. The microphone is a precision measurement sensor,

long-term exposure to high humidity or dust environment would impact microphone.

Microphone that is not in use should be placed in a attached box.

The microphone is ICCP power supply. The supply current specifications are 4mA, voltage

24V. It will damage the microphone if voltage over 30V. PCE-428/430/432 sound level meter

has internal ICCP power which can connect to microphone directly.

Insert microphone to TNC connector. Then rotate the thread until the connection is tight.

2.3 Windscreen

Sound level meter equipped with WS002-9 windscreen for use in windy outdoor

environments. No need to use windscreen when used in a windless environment (such as

indoor measurement).

Insert the windscreen onto the microphone until stop according to above diagram. Refer to

Annex 4 Corrections of Windscreen in Free Filed to earn more detail.

21

2.4 Data and Power Supply Connector

PCE-428 / 430 / 432

There are 7 interfaces at the bottom of the sound level meter. Open the rubber cover to see

these interfaces.

PWR:

Power connector, using the standard DC socket (2.1mm core diameter), can connect to

the 7~14V 500mA external power supply.

☆Note: Exceed 14V could damage the sound level meter!

MiniUSB:

MiniUSB port which connects to a computer can be select as USB Disk Mode or

Modem Mode, refer to 4.4.10 USB Mode to earn more detail. Additional, MiniUSB can

be used as another external power, but the power supply must meet the requirement of

5V/1A.

USB Disk Mode：The files inside the MicroSD card can be access directly at this mode,

no need to install driver.

Computer can recognize the MiniUSB as serial port (virtual serial port, need to install

driver) and communicate with sound level meter by RS-232 protocol, refer to 5. RS-232

Communication Protocol to earn more detail.

☆Note：At least 1A power current capacity must be meet for power supply and cable

(cable with ferrite core is not recommend for power supply). Please select the working

mode in time after connected to the computer. Otherwise, the computer can’t recognize

the USB. The MiniUSB and RS-232 port cannot working at the same time when select

Modem Mode.

MicroSD:

MicroSD socket, standard MicroSD card can be used to store SWN, OCT and CSD files.

Recommend to use card-reader to format the MicroSD card, rather than format it at the U

22

Disk Mode. Note that the MicroSD card provides with the sound level meter has already

PCE-428 / 430 / 432

formatted before sale.

☆Note: Keep front side (with silk screen) of MicroSD card down to insert without

hot-plug.

RS-232:

It can be use as standard RS-232 port at Remote mode, and also can be used to

connect thermal printer as Printer mode. Refer to 4.6.3 Printer and 5. RS-232

Communication Protocol to earn more detail.

TRIGGER:

Trigger input interface using a standard 3.5mm headphone jack. Refer to 4.4.4 Trigger to

earn more detail.

DC OUT:

DC output interface using a standard 3.5mm headphone jack. Refer to 4.6.2 DC OUT to

earn more detail.

AC OUT:

AC output interface using a standard 3.5mm headphone jack. Refer to 4.6.1 AC OUT to

earn more detail.

2.5 Battery

Recommend to use 4 cell of alkaline battery (LR6/AA/AM3), paying attention to the battery

polarity (+/-) marked in the battery compartment. Do not mix using of old and new batteries at

the same time. Remove batteries when the device is not in use. The total voltage of 4 cell

battery cannot exceed 14V, otherwise it will damage the sound level meter.

The real test shows that the 4 cell of alkaline battery can support sustainable use of

approx.10 hours (depends on battery) for sound level meter. When use rechargeable battery

Eneloop BK-3HCCA/4BC (Rated capacity 2450mAh), sound level meter can work about 12

hours continuously. When the battery voltage is lower than the minimum voltage requirement

of the sound level meter, it will shut down automatically.

We recommend using external power supply or USB-power-bank rather than batteries for

long time running.

Follow the figure below to install or replace the battery:

23

PCE-428 / 430 / 432

Turn the button to the left side to unlock the battery compartment cover. Then lift the cover to

open it.

Close and lock the battery compartment after change the battery.

2.6 GPS

GPS antenna cover located on the top surface of sound level meter which select GPS

function as option module.

☆Note: GPS function must be select before delivery to user due to install GPS module

should return the sound level meter to factory.

GPS performance is mainly affected by two factors: the satellite ephemeris and the satellite

signal noise ratio.

24

 Satellite Ephemeris: GPS satellites orbit information. According to ephemeris, satellite

PCE-428 / 430 / 432

positioning signal and time, the current location can be determined. Ephemeris need to

download from the GPS satellites, but the download speed is very low (approx. 50bps),

and vulnerable to the impact of satellite signal strength. The high bit error rate may lead to

a longer time of download ephemeris, and even download fail. The sound level meter can

keep the ephemeris data in memory for approx. 30 minute after turn off GPS module. The

ephemeris data is only is valid within 2 hours.

 Satellite Signal Noise Ratio: Satellite positioning signal intensity. In rainy days or indoor,

signal strength will be affected.

GPS have 3 boot modes: Cold start, warm start and hot start

 Cold Start: First location, need to download the latest ephemeris and longer time.

 Warm Start: GPS module has the last saved location information, but need to

re-download the ephemeris due to expired. Warm start needs almost same time as cold

start.

 Hot Start: GPS module has valid ephemeris and can reposition in a very short time.

25

3. Measurement Screen

Start/Stop. Describe the measurement state.

Overload indicator and under-range indicator. Solid arrow

indicates that the current state is overload / under-range. Hollow

arrow indicates that overload / under-range event have occurred

within the integral period。At the beginning of the new integral

period, overload and under-range indicator icon will be clear.

ICCP power state. Displayed when ICCP is turn off.

Trigger state. Displayed when trigger is enable.

PCE-428 / 430 / 432

Sound level meter has three measurement modes: Level Meter, 1/1 Octave, 1/3 Octave.

User can select it in the menu of Function.

Level Meter has 8 screens which can be switch through <◄>, <►>. The 8 screens are: Main,

3-Profiles, LN Statistical, Time History, Custom Measurement Page 1, Custom Measurement

Page 2, GPS Page 1 and GPS Page 2.

1/1 Octave has 6 screens: Octave Histogram, Octave Table Page 1~3, GPS Page 1 and

GPS Page 2.

1/1 Octave has 7 screens: Octave Histogram, Octave Table Page 1~4, GPS Page 1 and

GPS Page 2.

3.1 Icons and Meaning of Screen Display

All icons of Main screen is enable, the meaning of each icons are describe as following:

26

RS-232 state. Icon will be displayed at the Remote mode,

and icon will be displayed at Printer mode.

Timer state. Icon means the timer is enabled and only run

once. Icon means the timer is enabled and run in loop.

MicroSD state. Displayed when enable the MicroSD storage.

Power state. The icons form left to right: external power supply,

battery supply (with voltage display) and USB power supply.

Calculation mode of measurement.
Filter state.

Detector state.

Icon of Profile. Indicate the profile number of current display.

Measurement value.

Visualize and dynamic bar graph display of measurement values

within the current range.

Date and time.
Current page number and total page number.

Internal temperature display.

Icon means the integral period, icon means the elapsed

time. The measurement stop when elapsed time equal to total

measurement time (Itg.Period * Repeat).

Icons in the same row will display one at the same time. All icons can be display on each

PCE-428 / 430 / 432

screen and keep the same meaning.

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3.2 Screen of Level Meter Mode

Main screen. Display the measurement

data, filter, detector, mode and Profile

number. Main screen only display one

group data of 3-Profile. Press <▲>,

<▼> to switch within 3-Profile.

3-Profile. Display the data and

corresponding mode, filter and detector

of 3-Profile measurement at the same

time. 3-Profile data can be saved into

SWN file.

LN Statistical. Display 10 groups of

statistical results. Each group of data

sources (fix mode to SPL, filter and

detector can be customize) and the

percentage value can be set through

the menu.

Time History. Display the current noise

value and time domain curve. The data

sources (one of 3-Profile) and the

time-line length (1min, 2min and 10min)

can be customize.

Press <ESC> to clear the screen and

re-display the curve.

PCE-428 / 430 / 432

28

Custom Measurement Page 1. User

can set the parameters of the 14 sets of

measurement. This screen can display

the first 7 sets.

Custom Measurement Page 2. User

can set the parameters of the 14 sets of

measurement. This screen can display

the last 7 sets.

GPS Page 1. Display GPS information:

GPS state, GPS date, GPS time,

latitude, longitude, altitude and speed.

GPS Page 2. Display number of satellite

which contribute to positioning, and

signal noise ratio of all visible satellites

(0dB~99dB).

☆ Note: Number of visible satellites

may be greater than the number of

positioning satellites due to some

satellites is unavailable for positioning.

PCE-428 / 430 / 432

29

3.3 Screen of 1/1 Octave Mode

1/1 Octave Spectra. Display 12 bands

of 8Hz~16kHz and L

Aeq

, L

Beq

, L

Ceq

, L

Zeq

as bar graph. Press <▲>, <▼> to

display the detail value of each band. A

threshold can be set for each band. The

LED indicator will turn red when the

data exceed the threshold.

Octave Table Page 1. Display the

measurement data of 8Hz~16kHz. The

LED indicator will turn red and dB value

will display as invert color when the data

exceed the threshold.

Octave Table Page 2. Display the

measurement data of L

Aeq、LBeq、LCeq

、

L

Zeq

. The LED indicator will turn red and

will be display when the data

exceed the threshold.

1/3 Octave Spectra. Display 36 bands

of 6.3Hz~20kHz and L

Aeq

, L

Beq

, L

Ceq

,

L

Zeq

as bar graph. Press <▲>, <▼> to

display the detail value of each band. A

threshold can be set for each band. The

LED indicator will turn red when the

data exceed the threshold.

PCE-428 / 430 / 432

3.4 Screen of 1/3 Octave Mode

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Octave Table Page 1. Display the

measurement data of 6.3Hz~80Hz. The

LED indicator will turn red and dB value

will display as invert color when the data

exceed the threshold.

Octave Table Page 2. Display the

measurement data of 100Hz~1.25kHz.

The LED indicator will turn red and dB

value will display as invert color when

the data exceed the threshold.

Octave Table Page 3. Display the

measurement data of 1.6kHz~20kHz.

The LED indicator will turn red and dB

value will display as invert color when

the data exceed the threshold.

Octave Table Page 4. Display the

measurement data of L

Aeq、LBeq、LCeq

、

L

Zeq

. The LED indicator will turn red and

will be display when the data

exceed the threshold.

PCE-428 / 430 / 432

31

4. Operation and Setting of the Menu

PCE-428 / 430 / 432

Press <Menu> to access the next level menu. All parameters

related to measurement can be set in the menu.

Menu Tree

4.1 Function

32

Select Function and press <Enter> to enter this menu. 3 kind

of measurement can be select: Level Meter, 1/1 Octave and

1/3 Octave. Press <▲>, <▼> can select mode of

measurement. Press <Enter> to save setting and return to

previous menu. Press <ESC> to return to previous menu.

4.2 Calibration

PCE-428 / 430 / 432

Select Calibration and press <Enter> to enter this menu.

Many factors include temperature, humidity and air pressure

will impact the microphone's sensitivity. Therefore, user must

run calibration at least once before measurement.

There are two calibration methods: By Measurement and By

Cal.Factor. Method of By Measurement is recommend for

calibration with sound calibrator. Method of By Cal.Factor can manually adjust the calibration

factor by user.

4.2.1 Calibration by Measurement

Select By Measurement and press <Enter> to enter this

menu. Refer to Annex 2 Adjustments at the Calibration Check

Frequency to earn more detail of the stated calibrator and

corresponding adjustment value.

Cal.Level can be adjusted between 0dB~199.9dB. Press <◄>,

<►> and <▲>, <▼> can change the Cal.Level and press

<Start> to start calibration. After calibration finished, the new Cal.Factor will be update as the

result and user can press <Enter> or <ESC> to save or ignore this result. This menu also

displays the calibration history. Ending with symbol M indicate the record was calibrate by the

method of By Measurement.

4.2.2 Calibration by Cal.Factor

Select By Cal.Factor and press <Enter> to enter this menu.

Users can adjust the calibration factor manually. Press <◄>,

<►> can select the digit of factor, press <▲>, <▼> can adjust

the value, press <Enter> to save and press <ESC> to return to

previous menu. Ending with symbol F indicate the record was

calibrate by the method of By Cal.Factor.

4.2.3 Conversion of Cal.Factor and Sensitivity

The sensitivity can be calculated by the following formulas, and the calibration factor also can

be calculated from sensitivity and type into sound level meter directly.

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Cal.F = 20 * log (Sens / 40) + offset

PCE-428 / 430 / 432

Sens = 40 * 10

Where:

Cal.F

is the calibration factor, expressed in decibels (dB);

Sens

is sensitivity of microphone, expressed in mV/Pa;

offset

is the calibration factor, expressed in decibels (dB). This value is the calibration

result by the method of By Measurement with 40mV signal. This offset is inherent deviation

which is different for each sound level meter.

4.2.4 Process of Calibration by Measurement

Calibration by measurement is the recommend method of calibration with sound calibrator.

PCE-428/430/432 can provide class 1 and class 2 sound calibrator comply with the GB/T 15173-2010,

IEC60942: 2003 standard.

The process of calibration by measurement is shown as following:

(1) Insert the microphone into the cavity of the calibrator until stop without loosening.

((Cal.F-offset) / 20)

(2) Then open the power of the calibrator and set to a constant sound pressure level (for

example 94dB).

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