Galaxy Audio CM170 Users Manual

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USER’S MANUAL

Data Logger

SOUND LEVEL METER

www.galaxyaudio.com/products/CM-170

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Contents

Introduction..................................................................1

Safety Information........................................................2

Overview...................................................................3-4

Before Getting Started..................................................5

Getting Started..........................................................6-7

Data Logger & Interval Setup.....................................8-9

Setting The Date & Time...............................................9

Calibration Procedure.................................................10

Operating Precautions................................................10

Measurement.............................................................11

Using the PC Software...........................................11-17

Frequently Asked Questions.......................................18

Specifications.............................................................19

Introduction

Thank you for choosing the CM-170 Sound Pressure Level Meter. You have joined hundreds of thousands of other satisfied Galaxy customers. Since 1977 Galaxy Audio’s professional experience in design and manufacturing ensure our products’ quality, performance and reliability.

For the most up to date manual and information

visit www.galaxyaudio.com.

Safety Information

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.

Environmental Operating Conditions

Altitude up to 2000 meters Relative humidity 90% max. Ambient Operating Temperature 0 ~ 40 C

Maintenance & Cleaning

Repairs or servicing not covered in this manual should only be performed by qualiﬁed personnel. Periodically wipe the case with a dry cloth. Do not use abrasives or solvents on this instrument.

Safety Symbols

Complies with EMC When servicing, use only speciﬁed replacement parts.

Described below, are the functions of the front panel control buttons and encoders for the CM-170.

Windscreen

Display Screen

Power Button

MAX/MIN Button

REC Button

A/C Button

FAST/SLOW Button

Range Control Button

Microphone

AC/DC Signal Output Jack

USB Port

Tripod Mounting Thread

Battery Compartment

Display Screen:

SYMBOL FUNCTION

Battery Capacity Indicator Auto Power Off Indicator Maximum/Minimum Indicator Time Weighting Indicator Level Range Indicator Bar Graph Time Frequency Weighting Indicator Level Reading Date

Over-Range Signal Indicator

Memory Full Recording Data Logger Indicator

Under-Range Signal Indicator

Before Getting Started

Batteries:

Battery Loading:

Remove the battery cover on the back and insert four 1.5V AAA sized batteries. Pay attention to the polarity as indicated in the compartment.

Note:

It is possible to use size AAA rechargeable batteries, but a separate external charger must be provided for such batteries, since the unit is not designed to recharge batteries.

Battery Capacity Indicator:

When operating the unit on batteries, periodically check this indicator to determine the remaining battery capacity.

Good Partially Depleted Replace Batteries

External Power Supply:

A USB Power Supply can be connected to the USB Port.

Note:

When the AC/DC adapter is connected, the unit will be powered from the adapter, as well as when batteries are inserted (The AC/DC adapter has priority).

Getting Started

Windscreen:

When making outdoor measurements, wind noise at the microphone can cause measurement errors. Such effects can be reduced by using the windscreen.

Display Screen.

Power Button:

Press the button to turn the meter on. To turn the unit off, press and hold button down until the screen shows “OFF 3, 2, 1,” then the LCD screen will turn off.

LCD Backlight On/Off:

Press to turn on the LCD backlight. This makes it easier to read in dark environments. Press again to turn off the backlight. The meter can also turn the backlight off automatically after 30 seconds to save battery power.

Auto Power Off:

To save battery life, by default, when the unit is powered on, it is in auto power mode. The unit will power itself off after 30 minutes if there is no key operation. Auto power off will be disabled under the following circumstances: a. When connecting to a PC. b. When the recording function is in process.

Disable Auto Power Off:

Press and hold the button and power on the meter. The will not show up on the display, meaning “Auto Power Off” is now disabled. Note: When the user powers on the unit, the LCD will show how much internal memory space is available to use.

MAX/MIN Button:

Press the button to enter the maximum and minimum recording mode. Under this mode, the maximum value and minimum value will be stored and automatically updated in the memory. Pressing the button will display the “MAX” symbol and the maximum value on the display. Pressing the button again will display the “MIN” symbol indicator and the Minimum value on the display. To exit the maximum and minimum mode, press and hold button down until the “MAX MIN” symbol disappears.

Getting Started Cont.

REC Button:

When the button is pressed, recording will begin and the “REC” symbol will display. To stop the recording, press the button again.

A/C Button:

Sets the frequency weighting to A or C.

FAST/SLOW Button:

Sets the time weighting to Fast or Slow

Range Control Button:

Each time you press the button, the level range will rotate between “Lo” level, “Med” level, “Hi” level and “Auto” level.

Microphone:

1/2 inch electret condenser microphone.

AC/DC Signal Output Jack:

10. AC: 1 Vrms Corresponding to each

AC Signal

DC Signal

Ground

range step. (with frequency weighting) Output Impedance 100 Ohms Output Signal by standard 3.5mm coaxial socket signal on pin.

Note: At “Auto” level range, output signal is Auto select on “Lo”, “Med”, or “Hi” level range.

DC: Output: 10mV/dB

USB Port:

11.

Connection to a computer or external power supply input.

Tripod Mounting Thread:

12.

For long-term measurements, the unit can be mounted on a camera tripod. Proceed carefully, to avoid dropping the unit.

Battery Compartment.

13.

Data Logger & Interval Setup

Data Logger & Interval Setup:

How to store data in memory.

Auto Store Interval Time Setup:

Press and hold “ ” button and then power on the meter.

Press INTV ( ) button, “Int” appears for interval,

as well as a ﬂashing second display.

Now set the desired recording interval in minutes

and seconds. Press ( ) or ( ) to increase or decrease the number. Maximum of 1 minute can be set, and the minimum value is limited to “00:01”(=1s). After setting has been performed, press the INTV ( ) button once to get back to the display of the instantaneously measured values. If you want to abort during a setup process, press button to cancel.

Auto Store:

Auto Store Interval Time Setup: Pressing the button will start saving the measured values. The Values are stored in a memory location. Press button again to stop recording.

Note: During the recording period, most of the buttons such as the , , and are inoperative. All other settings must be made before starting the recording operation. The LCD will show “FULL” symbol when 64,000 recording intervals are stored in the memory.

Clearing Stored Data:

If you want to clear the memory, power off the unit, then press and hold the button and then press the button and hold for at least 5 seconds. The LCD will then show “ ” and “ ” to clear the memory.

Note:

The battery indicator “ ” shows the remaining battery power. The number of black bars decreases as the battery runs out. When the power is almost empty, “ ” will disappear. Pressing the button will cause the LCD display to show the “ ” warning indication. If the meter is under recording mode, it will stop.

Setting The Date & Time:

The unit incorporates a clock so that the data logger function can also record the date and time, along with the measurement value in the memory.

Turn the unit off.

Enter SETUP mode by pressing and holding the

button and then press the power button to turn the unit on. “ ” will then blink on the LCD display.

Press the CLOCK ( ) button to set the clock.

Setting The Date & Time

Press the ( ) or ( ) buttons to adjust the

year, then press the CLOCK ( ) button to adjust the next values: (Month > Date > Hour > Minute > Second)

When ﬁnished, press the CLOCK ( ) button to

exit the SETUP mode.

Note:

To abort during the process, press the power button to exit the SETUP mode.

An internal rechargeable backup battery keeps the clock of the unit

running. When the power is turned off, the backup battery is recharged by the main batteries. The clock will keep running for 30 minutes on the backup battery alone. If the unit is not to be used for an extended period of time, the main batteries should be taken out to prevent possible damage due to battery ﬂuid leakage. After reinserting the batteries, be sure to set the date and time again.

Calibration Procedures and Operating Precautions

Calibration Procedures:

Press and hold the button and then power on

the meter. The LCD will display the “ ” symbol.

Insert the microphone housing carefully into the

insertion cavity of the calibrator.

Press the ( ) or ( ) button to increase or

decrease the number.

Press the button to ﬁnish. If you want to abort

during a setup process, press the power button to cancel.

*Our products are all well calibrated before shipment. It’s recommended to re-calibrate every 1 year.

Operating Precautions:

Wind blowing across the microphone can greatly

affect the reading. When using the meter in the presence of wind, it is advised to use the included windscreen.

Calibrate the meter before operation if the meter

has not been in use for a long period of time or if operated in a bad environment.

Do not store or operate the meter in a high temperature and high

humidity environment.

Keep the microphone dry and avoid severe vibration.

Please take the batteries out and keep the meter in a low humidity

location when not in use.

Measurement

Measurement:

Turn the power on and select the desired response Time and

Frequency Weighting. If the sound source consists of short bursts or only catching sound peak, set response to FAST. To measure average sound level, use the SLOW setting. For general noise sound level, select A-weighting. For measuring sound level of loud sounds with high bass content, select C-weighting.

Hold the meter comfortably in your hand, or ﬁx to a tripod, and point

the microphone at the suspected noise source. The sound pressure level will then be displayed.

When MAX/MIN (maximum, minimum hold) mode is chosen, the

meter captures and holds the maximum and minimum noise level for a long period, using any of the time weightings. Press and hold the button for 2 seconds to clear the maximum and minimum reading. The “MIN/MAX” symbol will disappear.

Using the PC Software

CM-170 Setup Using USB Interface Software:

The SE323 Software Package Contains:

1. Installation CD

2. Micro USB Cable

System Requirements:

Windows XP / VISTA / 7 / 8 / 10

System Requirements:

PC or NoteBook with CD-ROM, or download the software online. At least 50 MB hard disk space available to install SE323 Software.

Installing the SE323 Software:

Insert the setup CD disk into CD disk drive. Windows will run the

setup.exe automatically.

If Windows fails to run the setup.exe automatically, click the start

button on the Taskbar and select Run. Type E:\SETUP and choose OK. If you can’t ﬁnd Run, open up “My Computer” from the start menu and double click the drive from there.

Using the PC Software

Follow the instructions to ﬁnish the installation.

It will copy the SE323.exe (executable ﬁle) and “help” ﬁle to your hard

disk (default is :\program ﬁles\SE323).

For other detailed operation instructions, please refer to the online help while executing the SE323 Software.

Main Menu:

File:

Open - Retrieve ﬁles. Save - Save the active window (when the caption bar is highlighted) data to ﬁle. Print - Print the graph of the active window. Printer Setup - Select the printer to print from. Exit - Closes the SE232 Program.

Real-Time:

Run - Start collecting real-time data. Stop - Stop collecting real-time data.

Data Logger:

Load Data - The user can load recorded data from the meter onto the PC. Erase Memory - The user can erase the memory off their connected Sound Pressure Level Meter.

View:

Control Panel - By opening the Control Panel Window, the user can control the meter via the buttons shown in this window. Real-Time Graph - Opening the Real-Time Graph will display the present data.

Graph:

Tool Bar:

Using the PC Software

- Display or hide Graph Statistic.

- Display or hide Line Cursor Statistic.

- Normal Cursor.

- When selected, the mouse cursor will become an “ X ” sign when moving to the graph. Click on the graph to mark an “ X ” sign on the graph.

- When selected, the mouse cursor will become an “ I ” sign when moving to the graph. Click on the graph to annotate.

- When selected, a window will pop up with a list of annotations that can be removed all at once, or one at a time.

- Clicking this will clear the graph.

Using the PC Software

You can choose a rectangle area on the graph to zoom in for detail. There are two vertical lines, “Cursor A” (Blue) and “Cursor B” (Red) in the graph. There are time and value displays on the top and right side of each cursor. You can move the mouse cursor over Cursor A or B and click to drag the Cursor left or right. Below Cursor A and B is a slider that you can click and drag to move Cursor A or B.

Below the slider are the Statistics. It displays start time, sampling rate, data number, and the maximum and minimum of the graph. The statistics also display the maximum, minimum, and average between cursor A and B. These will update automatically when moving Cursor A or B.

When on the Normal Cursor, you can double click on the graph to open the customization window. You can also click on the “Graph Option” button at the top of the window. In the customization window, you can customize your graph style.

Zoom:

You can Zoom in on an area on the graph by using the mouse.

To Zoom:

Left click and hold.

Drag the cursor to select the area you want to zoom in on.

Release the mouse button for the zoom to take effect.

Using the PC Software

To Undo Zoom:

Click on the “Undo Zoom” button at the top of the window.

Data Logger:

Example:

Connect the Sound Level Pressure meter to the PC. Select “Data Logger” from the main menu drop-down or click from the tool bar to load recorded data from the meter. There will be a progress indicator to show the loading progress.

If an error occurs, just click the “Data Logger” again. After the data has loaded, the left-hand side will show how many data sets were loaded and detailed information for each data set (Data set, Date, Time, Rate, Numbers, A/C, Fast/Slow, and Level).

The ﬁrst data set will transfer to the graph and tabular on the righthand side every time after loading recorded data from the Sound Level Meter. You can click on any data set to change the set for the graph.

Using the PC Software

On the right-hand side, set the waveform graph and statistical information of the data set you chose as you refer to the graph.

Tutorial - Quick Start to Using the CM-170:

Recording Real-Time Data in Waveform:

a. Power on the Sound Level Meter ﬁrst, then connect it to a PC USB Port with the cable.

b. Start the SE323 Program.

c. If the connection is successful, the panel will display the same value as the Sound Level Meter. If it fails to connect the meter with the PC, it will display “No Connection” on the panel window in the software.

d. When the connection is successful, click to start recording real-time data. There will be a waveform on the Real-Time Graph Window.

e. Click to stop recording.

How to Save the Recorded Real-Time Data to a File:

a. Click the graph window you want to save, and the graph window will become active. Then click the File drop-down from the main menu bar and select Save or click from the tool bar.

Active Window Inactive Window

b. There will be a save dialog window for you to choose the ﬁle name and ﬁle type to save. There are three types of ﬁle formats you can choose: binary ﬁle (*.ghf), text ﬁle (*.txt) and EXCEL ﬁle (*.csv). The *.ghf ﬁle uses the least ﬁle space but can only be used in the SE323 software.

Using the PC Software

The text ﬁle can be opened by the SE323 software and other word processing programs like word, notepad, etc. The EXCEL formatted ﬁle can be opened by the SE323 software and the Microsoft EXCEL program.

How to Load the Recorded Data from the Memory of the Sound

3. Level Meter and save it to a ﬁle: (Only for the model with Data Logging)

a. Power on the Sound Level Meter. b. Press the REC button of the meter to start recording data. c. After a while, press the REC button again to stop recording data. d. Connect the Sound Level Meter to the PC. e. Start the SE323 Program. f. Choose Data Logger from the main menu or click from the tool bar.

g. In reference to the Data Logger, see Data Logger on page 8.

Frequently Asked Questions

Frequently Asked Questions:

How can I save the graph to a ﬁle which can be used in EXCEL?

1. Answer: When you save a graph to a ﬁle, the default ﬁle format

is (*.ghf). You need to select the ﬁle format (*.csv) in order to save as a useable format for EXCEL.

How do I uninstall the SE323 Software?

2. Answer: Uninstall the SE323 software by launching the

“Add/Remove Programs” applet out of the Control Panel. For some systems you may need to go to: Control Panel > Programs > Uninstall a program. Highlight SE323 and click on “Add/Remove”, or “Uninstall” depending on the PC system. It will then remove the SE323 folder and ﬁles from your computer.

How do I zoom in on the graph?

3. Answer: Click the left mouse button, hold, and drag the cursor to

select the area to be zoomed in on, then release the mouse button.

When I set up the real-time sampling with a fast rate, some of the

4. sampling data might be lost. Answer: This might be caused by a slow response time of the PC.

I get erratic readings outside.

5. Answer: Use the windscreen to prevent the wind from interfering with

the measurement.

Is there an AC adapter for the CM170?

6. Answer: The CM170 can be powered via the USB, this will not

however, charge batteries.

My CM-170 keeps shutting off after a while.

7. Answer: To save battery life, there is an auto shut off after 30

minutes of not touching any buttons this is bypassed when connecting to a PC, or while logging.

Specifications

Speciﬁcations:

SPECIFICATIONS

Standard: IEC 61672-1 Class 2, ANSI S1.4 Type 2 Microphone: 1/2" Electret Condenser Microphone Accuracy: ±1.4 dB (under reference conditions, 94 dB @ 1 kHz) Display: Liquid Crystal Display Digital Display: 4 Digits

Resolution: 0.1 dB Display Update: 0.5 sec. Analog Display: 30 Segment Bar Graph Resolution 2 dB Display Update: 50 mS

Measuring Level Range: 30 ~ 130 dB Level Ranges: Lo: 30 - 90 dB

Med: 50 - 110 dB Hi: 70 - 130 dB Auto: 30 - 130 dB Auxiliary Outputs: AC Signal Output, 1 Vrms at FS (Full Scale) (FS: Means the upper limit of each level range.)

DC Output: 10mV / dB Frequency Weighting: A / C Time Weighting: FAST, SLOW Dynamic Range: 60 dB Frequency Range: 20 Hz ~ 8 kHz Alarm Function: “OVER” is when input is more

than upper limit of range. “UNDER” is when input is less than lower limit of range.

Data Logging Capacity: 64,000 Records Power Supply: 4 AAA, NEDA 24A, IEC LR03 Batteries Battery Life: Approximately 24 hrs (alkaline battery) Power Consumption: Approx. 0.2 W External Power Supply: 5 VDC (micro USB plug) Operation Temperature: 0C° to 40C° (32F° to 104F°) Operation Humidity: 10 to 90% RH Storage Temperature: 10C° to 60C° (14F° to 140F°) Storage Humidity: 10 to 75% RH Dimensions: 10.4" x 2.5" x 1.1" (264 x 63 x 29 mm)(LxWxH) Weight: 0.54 lb (8.642 oz)