Leica DD120 Underground Utility Locator Instruction Manual

1. Rhagymadrodd

This manual provides comprehensive instructions for the safe and effective operation, setup, and maintenance of the Leica DD120 Underground Utility Locator. This device is designed to accurately locate metallic wires and pipes with or without an electric charge, aiding in the prevention of accidental damage to underground infrastructure.

The Leica DD120 is a robust and reliable tool for professionals requiring precise utility detection, featuring auto-power up, self-test functions, and depth estimation capabilities when used with a compatible transmitter.

2. Gwybodaeth Diogelwch

Always prioritize safety when operating the Leica DD120. Failure to follow these safety guidelines may result in serious injury, property damage, or inaccurate readings.

Rhagofalon Diogelwch Cyffredinol:

• Before commencing any excavation, always verify the location of all underground utilities using the locator and other available methods.
• Wear appropriate personal protective equipment (PPE) as required by site regulations.
• Do not operate the device in hazardous environments unless it is specifically rated for such conditions.
• Cadwch y ddyfais yn lân ac yn rhydd rhag malurion.
• Ensure batteries are correctly installed and replaced when low to maintain optimal performance.
• Avoid direct contact with live electrical circuits. The locator is designed for detection, not for direct contact.
• Do not modify the device in any way. Unauthorized modifications can compromise safety and performance.

Diogelwch Trydanol:

• Be aware of the risks associated with live electrical cables. Always assume lines are live until proven otherwise.
• Maintain a safe distance from detected electrical lines.
• In case of accidental contact with an electrical line, immediately cease operations and follow emergency procedures.

3. Cynnyrch Drosview

The Leica DD120 is a handheld receiver designed for efficient and accurate detection of underground utilities. Its robust construction ensures durability in various field conditions.

Figure 3.1: Leica DD120 Underground Utility Locator. This image shows the main unit of the locator, which is primarily yellow with a black handle and top section. The Leica logo and "DIGICAT 550i Cable Avoidance Tool" are visible on the yellow body. A small display area is present on the black top section.

Cydrannau Allweddol:

• Uned Derbynnydd: The main handheld device for detecting signals.
• Arddangos: LED Signal Strength Display provides peak readings and indicates signal strength.
• Rheolaethau: Buttons for mode selection and other functions (specific button functions are detailed in the Operation section).
• Adran Batri: Located typically at the base or handle for AA alkaline batteries.
• Siaradwr: Provides audible alerts for detected signals.

4. Gosod

4.1 Gosod Batri:

1. Locate the battery compartment, typically on the underside of the handle or main body.
2. Agorwch y clawr adran batri.
3. Insert six (6) AA alkaline batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
4. Caewch y clawr adran batri yn ddiogel.

4.2 Gwiriadau Cychwynnol:

• Upon power-up, the device performs self-test functions. Observe the display for any error indicators.
• Ensure the display is clear and readable.
• Verify audible alerts are functioning by testing in a known signal area or by activating a test tone if available.

5. Gweithrediad

The Leica DD120 offers multiple operating modes to detect various types of underground utilities.

5.1 Power Mode (50/60 Hz):

This mode detects electromagnetic fields radiated by loaded power cables. It is ideal for quickly identifying live electrical lines.

1. Select "Power Mode" on the device.
2. Hold the locator vertically and sweep it slowly across the area of interest.
3. Observe the LED signal strength display. A peak reading indicates the presence of a power cable.
4. The audible alert will increase in pitch and volume as you approach the utility.

5.2 Radio Mode (15 to 60 Hz):

Radio mode detects re-radiated radio signals that are often present on metallic utilities such as pipes and cables, even if they are not carrying an electrical current.

1. Select "Radio Mode".
2. Sweep the locator over the area, listening for changes in the audible tone and observing the display.
3. This mode is useful for initial sweeps to identify potential utility paths.

5.3 Transmitter Mode (8 and 33 kHz):

For precise location and depth estimation, use the DD120 with a compatible transmitter (e.g., Leica DD120 Transmitter, sold separately). The transmitter induces a specific signal onto the utility, which the receiver then detects.

Cysylltiad uniongyrchol:

• Connect the transmitter directly to the utility (e.g., a metallic pipe or cable).
• Select the corresponding frequency (8 kHz or 33 kHz) on both the transmitter and the DD120 receiver.
• Sweep the receiver along the expected path of the utility.

Sefydlu:

• Place the transmitter on the ground above the utility to induce a signal without direct connection.
• Select the appropriate frequency on the receiver.
• Proceed with sweeping the receiver to locate the induced signal.

5.4 Depth Estimation:

When used with a compatible transmitter, the DD120 can estimate the depth of the detected utility. This feature is crucial for safe excavation planning.

1. Ensure you are in Transmitter Mode and have a clear, strong signal.
2. Position the locator directly over the utility for a peak signal reading.
3. The estimated depth will be displayed on the screen. Note that accuracy can be affected by soil conditions and signal interference.

6. cynnal

Proper maintenance ensures the longevity and accuracy of your Leica DD120.

6.1 Glanhau:

• Sychwch y ddyfais gyda meddal, damp brethyn ar ôl pob defnydd.
• Peidiwch â defnyddio glanhawyr sgraffiniol na thoddyddion, gan y gall y rhain niweidio'r casing neu arddangosfa.
• Ensure no moisture enters the battery compartment or other openings.

6.2 Storio:

• Store the locator in its carrying case when not in use to protect it from dust, dirt, and physical damage.
• Storiwch mewn lle oer, sych, i ffwrdd o olau haul uniongyrchol a thymheredd eithafol.
• Tynnwch y batris os na fydd y ddyfais yn cael ei defnyddio am gyfnod hir er mwyn atal gollyngiadau.

6.3 Gofal Batri:

• Always use fresh, high-quality AA alkaline batteries.
• Replace all batteries simultaneously; do not mix old and new batteries.
• Gwaredwch batris ail-law yn unol â rheoliadau lleol.

7. Datrys Problemau

This section addresses common issues you might encounter with your Leica DD120.

8. manylebau

9. Gwarant a Chefnogaeth

For detailed warranty information, technical support, or service inquiries regarding your Leica DD120 Underground Utility Locator, please refer to the official Leica Geosystems websafle neu cysylltwch â'u canolfannau gwasanaeth awdurdodedig.

It is recommended to register your product with Leica Geosystems to ensure you receive important updates and support.

Leica Geosystems Official Websafle: www.leica-geosystems.com

Please have your model number (LEICA DD120) and serial number ready when contacting support.