Galaxy Audio CM170 Users Manual
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.
1
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
o
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.
2
Described below, are the functions of the front panel control buttons and
encoders for the CM-170.
1
2
3
4
5
6
7
8
9
12
10
11
13
Windscreen
1
2
Display Screen
3
Power Button
MAX/MIN Button
4
5
REC Button
A/C Button
6
FAST/SLOW Button
7
8
Range Control Button
Microphone
9
AC/DC Signal Output Jack
10
USB Port
11
Tripod Mounting Thread
12
Battery Compartment
13
3
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
4
Before Getting Started
Batteries:
Battery Loading:
1.
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:
2.
When operating the unit on batteries, periodically check this indicator
to determine the remaining battery capacity.
Good Partially Depleted Replace Batteries
External Power Supply:
3.
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).
5
Getting Started
Windscreen:
1.
When making outdoor measurements, wind noise at the microphone
can cause measurement errors. Such effects can be reduced by
using the windscreen.
Display Screen.
2.
Power Button:
3.
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.
4.
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.
6
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