Galaxy Audio CHECK MATE CM-170 Manuel utilisateur
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Contents
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.
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
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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.
o
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.
Safety Information:
3
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
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Range Control Button
Microphone
AC/DC Signal Output Jack
USB Port
Tripod Mounting Thread
Battery Compartment
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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
Display Screen:
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.
1.
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.
2.
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).
3.
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6
Getting Started
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.
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.
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.
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.
1.
2.
3.
4.
7
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:
AC: 1 Vrms Corresponding to each
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:
Connection to a computer or external power supply input.
Tripod Mounting Thread:
For long-term measurements, the unit can be mounted on a camera
tripod. Proceed carefully, to avoid dropping the unit.
Battery Compartment.
AC Signal
DC Signal
Ground
5.
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13.
8.
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8
Data Logger & Interval Setup
How to store data in memory.
Auto Store Interval Time Setup:
Data Logger & Interval 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.
1.
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3.
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.
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