Check Mate CM-130 - Sound Level Meter Galaxy Audio - Free user manual and instructions

Product Type	Mini Sound Level Meter
Brand	Galaxy Audio
Model	Check Mate CM-130
Measurement Range	40 dB to 130 dB
Frequency Range	125 Hz to 8 kHz
Frequency Weighting	A and C weighting
Time Weighting	FAST (125 ms) and SLOW (1 second)
Display	4-digit LCD with 0.5 dB resolution
Accuracy	±2 dB (at 94 dB @ 1 kHz reference)
Microphone	1/2 inch electret condenser microphone
Power Supply	One 9V battery (006P, IEC 6F22, or NEDA 1604)
Battery Life	Approximately 110 hours (alkaline)
Dimensions	9.1 x 2.1 x 1.3 inches (23.1 x 5.3 x 3.3 cm)
Weight	170 g (0.37 lbs) including battery
Operating Temperature	0°C to 40°C (32°F to 104°F)
Operating Humidity	10% to 90% RH
Storage Temperature	-10°C to 60°C (14°F to 140°F)
Storage Humidity	10% to 75% RH
Level Ranges	4 ranges: 40-70, 60-90, 80-110, 100-130 dB
MAX Hold Function	Captures and holds maximum noise level
Calibration	Via CAL potentiometer; recommended annually
Alarm Indication	"OVER" or "UNDER" when out of range
Maintenance	Wipe with dry cloth; do not use abrasives or solvents
Safety	Use only as specified; repairs by qualified personnel
Accessories Included	9V battery, instruction manual, carrying case

Frequently Asked Questions - Check Mate CM-130 Galaxy Audio

How do I calibrate the CM-130 sound level meter?

Use a standard acoustic calibrator (94 dB, 1 kHz sine wave). Set the meter to dBA, FAST time weighting, disable MAX Hold, and select range 80-110 dB. Insert the microphone into the calibrator, turn on the calibrator, and adjust the CAL potentiometer until the display reads 94 dB. Recalibrate annually.

What battery does the Check Mate CM-130 use and how long does it last?

It uses one 9V battery (type 006P, IEC 6F22, or NEDA 1604). With an alkaline battery, it lasts approximately 110 hours. Replace when the low battery symbol appears on the display.

How do I select the correct measurement range?

Press the Level Range Control Button repeatedly to cycle through four ranges: Range1 (40-70 dB), Range2 (60-90 dB), Range3 (80-110 dB), and Range4 (100-130 dB). Choose the range that best covers the expected sound level.

What is the difference between A-weighting and C-weighting?

A-weighting is for general sound level measurements and approximates human hearing. C-weighting is for checking low-frequency content. If the C-weighted level is much higher than A-weighted, there is significant low-frequency noise.

When should I use FAST vs SLOW time weighting?

Use FAST (125 ms response) for measuring short bursts or peaks. Use SLOW (1 second response) to measure average levels of fluctuating noise.

How do I use the MAX Hold function?

Press the MAX button to enter MAX Hold mode. The meter will capture and hold the maximum noise level. Press the button again to exit. Note: changing range, weighting, or turning off will clear the held value.

What does 'OVER' or 'UNDER' mean on the display?

OVER indicates the sound level exceeds the upper limit of the selected range. UNDER indicates the level is below the lower limit. Change to a higher or lower range accordingly.

How should I maintain and clean the sound level meter?

Periodically wipe the case with a dry cloth. Do not use abrasives or solvents. Keep the microphone dry and avoid severe vibration. Remove the battery when storing in a low-humidity environment.

Can I repair the CM-130 myself?

Only perform servicing covered in the manual. For other repairs, contact qualified personnel. Use only specified replacement parts when servicing.

What is the accuracy of the CM-130 sound level meter?

The accuracy is ±2 dB under reference conditions (94 dB at 1 kHz). The resolution is 0.5 dB on the 4-digit LCD display.

USER MANUAL Check Mate CM-130 Galaxy Audio

316.263.2852 FAX [phone]

www.galaxyaudio.com

Instruction

Manual

CM-130

CE

329-00 DEC 2002

MINI SOUND LEVEL METER

CONTENTS

TITLE

I. Safety Information...... 1
II. General Description.... 1
III. Specifications....2-3
IV. Controls.... 4-5
V. Calibration Procedures....6
VI. Measurement Preparation......7
VII. Operating Precautions.... 7
VIII. Measurement....7-8

I. 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

① Altitude up to 2000 meters
② Relative humidity 90% max.
③ Operation Ambient 0 to 40°C

▶ Maintenance & Clearing

① Repairs or servicing not covered in this manual should only be performed by qualified personnel.
② 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.

II. General Description

To ensure that you can get the most from the Mini Sound Level Meter, we recommend that you read and follow the manual carefully before use.

☐ Range from 40dB to 130dB at frequencies between 125Hz and 8 KHz.
☐ Display with 0.5dB steps on a 4-digit LCD.
☐ Two equivalent weighted sound pressure levels, A and C.

III. Specifications

Frequency Range: 125Hz to 8KHz

Measuring Level Range: 40dB to 130dB

Frequency Weighting: A/C

Microphone: 1/2 inch electret condenser microphone

Display: LCD

Digital Display: 4 digit

Resolution: 0.5dB

Display Update: 2 times/sec.

Time Weighting:

FAST 125ms

SLOW 1 second

Level Ranges:

Range1: 40 dB to 70 dB

Range2: 60 dB to 90 dB

Range3: 80 dB to 110 dB

Range4: 100 dB to 130 dB

Accuracy: ±2dB(under reference conditions 94dB@1kHz )

Dynamic Range: 30 dB

Alarm Function: “OVER” is displayed when the input is more than the upper limit of the range.

"UNDER" is displayed when the input is less than the lower limit of the range.

MAX Hold function: Holds readings of the maximum value.

Power Supply: One 9V battery

006P or IEC 6F22 or NEDA 1604.

Power Life: Approximately 110 hours

(Alkaline Battery)

Operation Temperature: 0 to 40°C (32 to 104°F)

Operation Humidity: 10 to 90% RH

Storage Temperature: -10 to 60°C (14 to 140°F)

Storage Humidity: 10 to 75% RH

Dimensions: 9.1" L ×2.1" W ×1.3" H

23.1 cm ×5.3 cm ×3.3 cm

Weight: 170g (0.37 lbs) (including battery)

Accessories: 9V battery, instruction manual, and carrying case.

IV. Controls

① Microphone

1/2 inch Electret Condenser microphone

② Display

③ Power Button

The ① button turns the sound level meter ON or OFF.

④ MAX Hold button

Press the MAX button to enter the maximum recording mode. Select the proper level range before using MAX to ensure that read value would not exceed the measurement range. Press again to exit the MAX mode.

Note: If the sound level or A-C weight are changed, the MAX mode will clear.

⑤ Frequency Weighting Select Button

A: A-Weighting for general sound level measurements
C: C-Weighting for checking the low-frequency content of noise
(If the C-Weighted level is much higher than the A-weighted level, then there is a large amount of low-frequency noise.)

⑥ Time Weighting Select Button.

FAST: for normal measurements SLOW: for checking average level of fluctuating noise

⑦ Level Range Control Button

Each time the level button is pressed, the level range will cycle through the “Range1”, “Range2”, “Range3”, and “Range4”, levels.

⑧ CAL Potentiometer

Calibration control for level calibration adjustment.

⑨ Battery Cover

V. Calibration Procedures

Using a standard Acoustic Calibrator (94dB, 1KHz sine wave)

(1) Make the following switch settings.

Display: dBA

Time Weighting: FAST

Measurement Mode: MAX Mode function disable.

Level Range: 80 to 110dB

(2) Insert the microphone housing carefully into the insertion hole of the calibrator.

(3) Turn on the calibrator and adjust the CAL potentiometer of the meter until the level display indicates the desired level. The meter is calibrated before shipment. We recommend recalibration annually.

VI. Measurement Preparation

(1) Battery Loading

Remove the battery cover on the back and install one 9V Battery.

(2) Battery Replacement

When the battery voltage drops below that required for reliable operation, the low battery symbol 📄 will appear, indicating it is time to replace the battery.

VII. Operating Precautions

(1) Calibrate the instrument before operation if the instrument has not been used for a long period of time.
(2) Do not store or operate the instrument in high temperature and high humidity environments.
(3) Keep the microphone dry and avoid severe vibration.
(4) Remove the battery from the instrument, and store in a low humidity environment when not in use.

VIII. Measurement

(1) Open the battery cover and install a 9V battery in the battery compartment.
(2) Turn power ON and select the desired response time and weighting. If the sound source consists of short bursts, or the meter is only catching sound peaks, set response to FAST. To measure average sound levels, use the SLOW setting.
Select A-weighting for general noise sound level and C-weighting for measuring sounds with high low frequency content.
(3) Select desired level.

(4) Hold the instrument comfortably in your hand and point the microphone at the suspected noise source. Read the sound pressure level from the display.
(5) When MAX (maximum hold) mode is chosen, the instrument captures and holds the maximum noise level values indefinitely. The MAX function operates on all settings, regardless of the response time, weighting, or range.
Press the MAX button again to clear the MAX reading. The "MAX" symbol will disappear.
(6) Turn OFF the instrument and remove the battery when not is use.