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Chromatic Tuner  

& Metronome

CTM-40

Owner’s Manual

P.O. Box 5111

 

Thousand Oaks, CA 91359-5111 

U.S.A.

www.deltalabef

fects.com

1. Turn the CTM-40 over.

2.  Remove battery cover by pressing on the 

thumb grip and sliding the cover off.

3.  Follow polarity guidelines when  

installing batteries.

4.  If the tuner malfunctions when new  

batteries are installed and you cannot  
correct the problem by turning the power  
off and then on again, remove and  
reinstall the batteries.

INSTALLING BATTERY

One (1) Year Limited Warranty and Remedies

 

Subject to the limitations below, DeltaLab® 
warrants to the original owner that the 
components of this product are free from 
defects in workmanship and materials, 
subject to normal use and service, for 
one (1) year from the date of purchase. 
DELTALAB® MAKES NO OTHER WARRANTIES, 
EXPRESS OR IMPLIED, INCLUDING, BUT 
NOT LIMITED TO, ANY IMPLIED WARRANTY 
OF MERCHANTABILITY OR FITNESS FOR A 
PARTICULAR PURPOSE OR ANY IMPLIED 
WARRANTY ARISING OUT OF A COURSE OF 
DEALING, CUSTOM OR USAGE OF TRADE. 
User is responsible for determining whether 
this product is fit for a particular purpose and 
suitable for user’s application. If the product 
is defective within the warranty period, user’s 
exclusive remedy and manufacturer’s sole 
obligation will be, at its option, to replace the 
product or refund the purchase price. Except 
where prohibited by law, manufacturer and 

WARRANTY

seller will not be liable for any loss or damage 
arising from the product, whether direct, 
indirect, special, incidental or consequential, 
regardless of the legal theory asserted, 
including warranty, contract, negligence or 
strict liability.

DeltaLab, P.O. Box 5111,  
Thousand Oaks, CA 91359-5111

California Prop 65 Warning: This product may 
contain a chemical(s) known to the state of 
California to cause cancer or birth defects or other 
reproductive harm.

All trademarks and registered trademarks 
mentioned herein are recognized as the property of 
their respective holders. 
Made in China 

                    0710-9380

metronome mode

1.  Press the power/play button to turn the 

CTM-40 on.

2.  Press and hold the mode button to switch 

to metronome mode.

3.  Press the beat button briefly to choose 

down beats per measure: 0 through 9.

4.  Press the rhythm button to choose a 

rhythm style:

5.  Press the tempo buttons to choose  

appropriate tempo, from 30 to 250  
beats per minute.

6.  Press the power/play button to start/stop 

the metronome.

7.  Pressing power/play again will turn off the 

sound and allow only the meter and lights 
to function.

8.  Press and hold the mode button to switch 

back to tuner mode.

9.  Press and hold the power/play button to 

turn off the CTM-40.

7

3

PRECAUTIONS/SAFETY

Environmental conditions

Using the tuner in these conditions may result 
in tuner malfunction:
• Direct Sunlight
• Extreme temperature or humidity
• Extreme dust or dirt
• Excessive vibration
• Proximity to magnetic fields

Battery

Turn the power switch off when not in use to 
preserve battery life. Remove battery during 
extended periods of non-use to prevent battery 
leakage into the unit.

Interference

Operate this device at a suitable distance from 
televisions and radios to prevent interference.

Handling

Do not apply excessive force to buttons or 
switches on this device. Use of excessive 
force may cause the device to malfunction.

Care

Do not use cleaning chemicals or cleaning 
liquids on the surface of this device. 

Chemicals may cause damage to the finish  
or display screen. If cleaning is required,  
use a soft, dry cloth to wipe the surface.

Foreign Matter

Avoid using this device in close proximity 
to liquids. Liquids entering the device may 
cause malfunction, electrical shock or fire. 
Metal objects or particles can also cause 
malfunction, electrical shock or fire.

This device complies with Part 15 of the FCC 
rules. Operation is subject to the following 
two conditions: (1) This device may not cause 
harmful interference, and (2) this device must 
accept any interference received, including 
interference that may cause undesired 
operation. This Class B digital apparatus 
complies with Canadian ICES-003 CET.

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