CMHT77623 - Detector Craftsman - Free user manual and instructions

USER MANUAL CMHT77623 Craftsman

The Stud Sensor CMHT77623 uses electronic signals to locate the center of wood or metal studs, live AC wires, or metal objects (e.g., pipe) through drywall or other common building materials.

PLEASE NOTE:

• The stud sensor will not detect objects in concrete, mortar, block, brick work, plaster, carpeting, foil-faced materials, metallic surfaces, or ceramic tile.
• The stud sensor will not detect plastic or PVC pipes.

Once the center of a wood or metal stud, or a metal object has been detected in one pass across the surface, the Stud Sensor CMHT77623 turns on the center LEDs and sounds an audible tone. A marking hole allows you to easily note the current position on the wall.

User Safety

Safety Guidelines

The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to these symbols.

WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in serious injury.

CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

NOTICE: Indicates a practice not related to personal injury which, if not avoided, may result in property damage.

If you have any questions or comments about this or any CRAFTSMAN® tool, go to www.CRAFTSMAN.com.

WARNING:

Read and understand all instructions. Failure to follow the warnings and instructions in this manual may result in serious personal injury.

SAVE THESE INSTRUCTIONS

WARNING:

The following label information can be found on your tool for your safety.

WARNING: If the equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

CAUTION: Protect your eyes. Wear safety goggles.

WARNING: This tool is not a measuring device and should not be used as a substitute for a voltmeter.

WARNING: The LED or Live Wire Detection symbol on the display is just an indicator and in some situations the voltage detection option may not accurately indicate the presence of voltage in a wall in the event of internal device failure or improper operation, and therefore should not be solely relied upon for identification of the presence of hazardous voltages. Other evidence, such as construction blueprints or visual identification of wiring or conduit entry points should also be utilized.

Always follow proper safety practices and use a separate detection method to verify a de-energized condition prior to commencing work.

WARNING: Always turn off AC power when working near wiring.

WARNING: Shielded wires or wires in metal conduits, casings, metalized walls, or thick, dense walls may not be detected.

CAUTION: Use personal protective equipment. Always wear eye protection. Depending on the work conditions, wearing protective equipment such as a dust mask, non-skid safety shoes, hard hat, and hearing protection will reduce the risk of personal injury.

IMPORTANT SAFETY NOTICE

Ensure proper detection of live wires. Always hold the Stud Sensor CMHT77623 in the handle area only. Grasp between fingers and thumb while making contact with your palm (Figure ①).

Supplier's Declaration of Conformity

47 CFR § 2.1077 Compliance Information

Responsible Party - U.S. Contact Information

CRAFTSMAN

701 East Joppa Road

Towson, Maryland 21286

www.CRAFTSMAN.com

FCC Statement

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.

E

• Connect the equipment into an outlet on a different circuit (not the circuit to which the receiver is connected).
• Consult the dealer or an experienced radio/TV technician for help.

Canada, Industry Canada (IC) Notices

This Device complies with Industry Canada License-exempt RSS standard(s). Operation is subject to the following two conditions: 1) this device may not cause interference, and 2) this device must accept any interference, including interference that may cause undesired operation of the device.

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for successful communication.

Battery Safety

WARNING:

Batteries can explode, or leak, and can cause injury or fire. To reduce this risk:

• Carefully follow all instructions and warnings on the battery label and package.
• Always insert batteries correctly with regard to polarity (+ and -, as marked on the battery and the equipment.
• Do not short battery terminals.
• Do not charge disposable batteries.
• Do not mix old and new batteries. Replace all batteries at the same time with new batteries of the same brand and type.
• Remove dead batteries immediately and dispose of per local codes.
• Do not dispose of batteries in fire.
• Keep batteries out of reach of children.

Installing AAA Batteries

Load two new AAA batteries in the CMHT77623 stud sensor.

1. On the bottom of the stud sensor, lift up the latch (Figure B to unlock the battery compartment cover.
2. Move the cover upward (Figure ②) and remove it once it separates from the stud sensor.
3. Insert two new, high-quality AAA batteries, making sure to position the - and + ends of each battery as noted inside the battery compartment (Figure B 3).

4. Place the cover back on the stud sensor (Figure ⑤ ④).

5. Insert the two pins at the top of the cover into the holes near the top of the battery compartment.

6. Slowly lower the cover and press down until the latch locks securely on the stud sensor.

Press or to test the stud sensor.

• The stud sensor should sound one short beep. The Power LED should turn on. All the other LEDs should illuminate for a second and then turn off.
• Whenever you press or , the green Power LED should illuminate to indicate that the batteries are good. If this LED blinks or does not illuminate, change the batteries.

Using the Stud Sensor

The CMHT77623 stud sensor will help you find wood or metal studs, AC voltage, or metal objects (e.g., pipe) behind drywall.

• The stud sensor has two buttons. Use the bottom button (Figure A 3) to search for wood/metal studs or AC, and use the top button (Figure A 2) to search for metal objects (e.g., pipe).
• The stud sensor will detect wood studs through up to 1" (25mm) thick drywall, and metal studs and AC voltage through up to 1.5" (38mm) thick drywall.
• The stud sensor will detect a ferrous metal object (contains iron) up to 3" (76.2mm) from the surface of the wall to the center of the object.
• The stud sensor will detect a non-ferrous metal object (e.g., copper) up to 2" (51mm) from the surface of the wall to the center of the object.
• When AC voltage is found, the stud sensor will sound short (alternating) beeps and light the AC LED (Figure A5).
• When the center of a stud is found (or a metal object is nearby), the stud sensor will sound one longer (constant) beep and light the center LEDs (Figure A 4).
• When live AC and the center of a stud are both found, the stud sensor will alternate between the long and short beeps, and light the center LEDs and the AC LED.

Finding a Stud

1. To hold the stud sensor, place your thumb on one side of the stud sensor, your pointer finger and your palm over the center of the stud sensor, and the rest of your fingers on the same hand on the other side of the stud sensor (Figure ①).
2. Gently place the stud sensor flat against the wall and parallel to a door or window on the same wall, which gives you an indication of how the studs are positioned behind the wall (Figure C ②).

3 Without moving the stud sensor, use your pointer finger to press and hold (Figure A 3). WAIT 1 sec until all the LEDs (except the Power LED) turn off.
4 While still pressing, SLOWLY move the stud sensor to the left or the right on the wall.
5. As you move the stud sensor, watch the stud sensor LEDs and listen for beeps.

If lights on the right side of the stud sensor (Figure ①), continue moving the stud sensor to the right to find the nearest stud. As you get closer to the stud, will light (Figure ②).
- If lights on the left side of the stud sensor, continue moving the stud sensor to the left to find the nearest stud. As you get closer to the stud, will light.
- If live AC voltage is found within 2^ - 18^ (.05m - .5m) of the stud sensor's current position, the AC LED will illuminate. If the date code on your stud sensor is 2020 09-XX or earlier, you will also hear short beeps. (For ease of use, the short beeps were removed from stud sensors dated 2020 10-XX or later.)

NOTE: Static electrical charges that can develop on drywall and other surfaces will spread the voltage detection area many inches on each side of the actual electrical wire. This can cause the stud sensor to indicate that it has found live AC when it is not actually near an electrical wire (Figure ①). To aid in locating the wire position, place your other hand on the surface approximately 12^ (30cm) from the stud sensor (Figure ②), or hold the stud sensor 1/2^ - 2^ (13mm - 50mm) away from the wall surface.

1. When the center LEDs light and you hear a constant beep, the stud sensor has found the center of a stud (Figure D 3).

2. STOP moving the stud sensor and continue to hold it at the current position.
   STOP pressing

Press (Figure A) to mark the current position on the wall as the center of the stud.
8. To find another stud on the wall, repeat the same steps.

Finding Metal Objects

The stud sensor will let you know if a metal object (e.g., a pipe) is located behind the wall within 3^ (76.2mm) of the stud sensor. In metal detection mode, the arrows do not indicate which direction to move the stud sensor to find metal.

To hold the stud sensor, place your thumb on one side of the stud sensor, your pointer finger and your palm over the center of the stud sensor, and the rest of your fingers on the same hand on the other side of the stud sensor (Figure ①).
2 Position the stud sensor flat against the wall and parallel to a door or window on the same wall, which gives you an indication of how the studs are positioned behind the wall (Figure C ②).
Without moving the stud sensor, use your pointer finger to press and hold (Figure A 2). After 1 sec all the LEDs (except the Power LED) will turn off.
4 While still pressing, SLOWLY move the stud sensor to the left or the right on the wall.
5. As you move the stud sensor, watch the stud sensor LEDs.

• When and light on the left and right sides of the stud sensor, slowly move the stud sensor to the left or right to find the metal object (Figure 1).

• When and light on the left and right sides of the stud sensor, you will know that you are moving the stud sensor closer to the metal object (Figure 2).

• When the center LEDs (Figure A) light and you hear a constant beep, the stud sensor has found a metal object (Figure F 3).

• STOP moving the stud sensor and continue to hold it at the current position.
  STOPpressing

7 Press (Figure A 6) to mark the current position on the wall.
8. To find another metal object behind the wall, repeat the same steps.

Maintenance

• When the stud sensor is not in use, clean the exterior parts with a damp cloth, wipe the stud sensor with a soft dry cloth to make sure it is dry.
• Although the stud sensor exterior is solvent resistant, NEVER use solvents to clean the stud sensor.
• Store the stud sensor in a clean location at a temperature between -67^ (-55^) and 158^ (70^) .

Troubleshooting

The ED is Blinking

The battery power is low.

• Check the AAA batteries to make sure:

Each battery is installed correctly, according to (+) and (-) listed inside the battery compartment.
- The battery contacts are clean and free of rust or corrosion.
- The batteries are new, high-quality batteries to reduce the chance of battery leakage.

• Make sure the AAA batteries are in proper working condition. If in doubt, try installing new batteries.

The LED does not Turn On

If the power LED does not turn on, or the power LED turns on for 1 sec and then turns off, there is no battery power.

• Install two new, high-quality, name-brand AAA batteries in the stud sensor.
• Make sure each battery is installed correctly, according to (+) and (-) listed inside the battery compartment.

The Stud Sensor is not Finding Studs

• Make sure the batteries are working.
• Make sure you have placed the stud sensor on a wall made of drywall or another common building material. The stud sensor will not work on walls made of concrete, mortar, block, brick work, plaster, carpeting, foil-faced materials, metallic surfaces, or ceramic tile.
• Make sure you have placed the stud sensor flat against the wall, the stud sensor is in a vertical position (parallel to a door or window), and you are pressing and holding (Figure A 3) as you move the stud sensor SLOWLY against the wall.
• Make sure the wall is not too thick. The CMHT77623 stud sensor can be used to detect wood studs on walls ≤ 1 (25mm) thick or metal studs on walls ≤ 1.5 (38mm) thick.
• Make sure the wall has a smooth surface.
  Make sure the temperature and relative humidity are within the Specifications.

The Stud Sensor is not Finding Metal Objects

• Make sure the batteries are working.
• Make sure you have placed the stud sensor on a wall made of drywall or another common building material. The stud sensor will not work on walls made of concrete, mortar, block, brick work, plaster, carpeting, foil-faced materials, metallic surfaces, or ceramic tile.
  Make sure you have placed the stud sensor flat against the wall, the stud sensor is in a vertical position (parallel to a door or window), and you are pressing and holding (Figure A 3) as you move the stud sensor SLOWLY against the wall.
• Make sure the wall is not too thick. The CMHT77623 stud sensor can be used to detect Non-Ferrous Metal (e.g., copper) on walls ≤ 2 (51mm) thick or Ferrous Metal (contains iron) on walls ≤ 3 (76.2mm) thick.
  Make sure the wall has a smooth surface.
• Make sure the temperature and relative humidity are within the Specifications.

Note: Disassembling the tool will void all warranties on the product.

To assure product SAFETY and RELIABILITY, repairs, maintenance and adjustment should be performed by authorized service centers. Service or maintenance performed by unqualified personnel may result in a risk of injury. To locate your nearest CRAFTSMAN service center, go to www.CRAFTSMAN.com

Warranty

Go to www.CRAFTSMAN.com for the latest warranty information.

Specifications

	CMHT77623
Detect Wood Studs up to 1" (25mm) thick drywall
Detect Metal Studs up to 1.5" (38mm) thick drywall
Detect Live AC Wire 110V @ 60 Hz up to 2" (51mm) behind the surface of the wall from a distance of 2"-18" (.05 m- .5 m)
Detect Ferrous Metal (contains iron) up to 3" (76.2mm) from the surface of the wall to the center of the metal object (pipe)
Detect Non-Ferrous Metal (e.g., copper or lead) up to 2" (51mm) from the surface of the wall to the center of the metal object (pipe)
Accuracy - Center of Wood stud +/- 1/4" (6.4mm) under 1/2" - 1" (12.7mm - 25mm) thick drywall
Accuracy - Center of Metal stud +/- 1/4" (6.4mm) under 1/2" - 1.5" (12.7mm - 38mm) thick drywall
Accuracy - Detecting Metal Objects +/- 3" (76.2mm)
Power Source 2 AAA (1.5V) size batteries (3V DC)
Battery Life 10 hrs of continual use, Power LED will flash to indicate low battery
Automatic Calibration Yes
Automatic Shutoff when release button Yes
Non-marring Surface Yes
Relative Humidity*	35% - 55%*
Operating Temperature	32°F to 122°F (0°C to 50°C)
Storage Temperature	-4°F to 158°F (-20°C to 70°C)
* The stud sensor may not accurately detect Live AC wires when the relative humidity is outside this range.

Contedio

Towson, Maryland 21286

www.CRAFTSMAN.com

Declaración de FCC

Towson, Maryland 21286

www.CRAFTSMAN.com

See product for country of origin statement.

N850994

March 2020