Garrett ACE 400i Metal Detector User Manual
Model: ACE 400i
1. Introdución
The Garrett ACE 400i is an advanced metal detector designed for hobbyists and enthusiasts. It builds upon the success of previous ACE models, offering enhanced features for improved target identification and detection depth. This manual provides comprehensive instructions for assembling, operating, and maintaining your ACE 400i to ensure optimal performance and longevity.
As características principais inclúen:
- Target Conductivity Indication: A numerical display (1-100) helps identify the probable nature of the target.
- Audio de ferro: Allows users to hear discriminated ferrous targets, aiding in distinguishing valuable items from trash.
- Increased Frequency (10 kHz): Provides enhanced detection depth and sensitivity to smaller targets.
- Ajuste de frecuencia: Helps eliminate interference when detecting near other metal detectors or electrical sources.
- Notch Discrimination: Customize discrimination patterns to ignore unwanted metals.
- Función de precisión: Precisely locate targets for easier recovery.
- Deseño lixeiro: Weighing approximately 1.32 kg, it is comfortable for extended use.

Figure 1: The Garrett ACE 400i Metal Detector, fully assembled. This image shows the main components including the search coil, shaft, control box, and arm cuff.
2. Información de seguridade
Always exercise caution when operating the metal detector to prevent injury or damage to the device. Adhere to the following safety guidelines:
- Avoid using the detector near active electrical lines or in adverse weather conditions.
- Be aware of your surroundings, especially when digging.
- Supervisar os nenos durante a operación.
- Do not attempt to detect in areas where digging is prohibited or dangerous.
- Obteña sempre permiso antes de detectar nunha propiedade privada.
3. Compoñentes incluídos
Your Garrett ACE 400i package typically includes the following components:
- Garrett ACE 400i Control Box with Shaft
- 18 x 26 cm (7" x 10") PROformance™ DD Search Coil
- Search Coil Cover
- Garrett ClearSound Easy Stow Headphones
- Garrett ACE Environmental Cover-Up (Rain Cover for Control Box)
- AA Batteries (4 required, may or may not be included depending on region/seller)
- Manual de usuario (este documento)

Figure 2: Garrett ClearSound Easy Stow Headphones, included with the detector for clear audio signals.

Figure 3: The protective cover for the search coil, designed to prevent scratches and wear during use.
4. Montaxe e Montaxe
Follow these steps to assemble your Garrett ACE 400i metal detector:
- Conecte a bobina de busca:
Align the search coil with the lower stem. Insert the plastic bolt through the holes on the coil and stem, then secure it with the wing nut. Ensure the coil cable is wrapped snugly around the lower and middle stems.

Figure 4: The DD search coil, which attaches to the lower shaft of the detector.
- Conecta a caixa de control:
Slide the control box onto the upper shaft. Secure it using the provided cam-locks. The new cam-lock rings prevent movement and play over time.

Figure 5: The control box attached to the upper shaft, showing the arm cuff and handle.
- Inserir pilas:
Open the battery compartment on the control box. Insert four (4) AA batteries, ensuring correct polarity. Close the compartment securely.
- Adjust Length and Arm Cuff:
Adjust the length of the shaft to a comfortable height, allowing the search coil to be parallel to the ground when you are standing upright. Adjust the arm cuff for a snug but comfortable fit on your forearm.
- Connect Coil Cable:
Plug the search coil cable connector into the corresponding port on the control box. Ensure a secure connection.
5. Instrucións de funcionamento
Familiarize yourself with the control panel and its functions before beginning your search.

Figure 6: Close-up of the Garrett ACE 400i control panel, showing the LCD screen and various buttons.
5.1. Acendido/apagado
Manteña premido o POTENCIA button to turn the detector on or off. The detector will power on in the last used search mode.
5.2. Understanding the Display (LCD)
The large LCD screen provides crucial information:
- Target ID Cursor: Indicates the probable target type (e.g., Iron, Foil, Nickel, Zinc, Copper, Silver).
- Digital Target ID (1-100): A numerical value representing the target's conductivity. Higher numbers indicate more conductive targets (e.g., silver coins), while lower numbers indicate less conductive targets (e.g., iron).
- Indicador de profundidade: Estimates the depth of the target in centimeters (5cm, 10cm, 15cm, 20+cm).
- Indicador de nivel de batería: Mostra a duración restante da batería.
- Indicador de sensibilidade: Displays the current sensitivity setting.
5.3. Modos de busca
The ACE 400i features five pre-programmed search modes. Press the MODO botón para percorrelos:
- Zero-Disc: All-metal mode. Detects all types of metal without discrimination.
- Xoias: Designed to ignore iron and small trash items, focusing on jewelry.
- Personalizado: Allows you to create and save your own discrimination pattern. Use the DISCRIM e V/X buttons to adjust the NOTCH segments.
- Moeda: Optimized for coin hunting, typically discriminating against iron and some foil.
- Relics: Designed to find relics, often with minimal iron discrimination, as many historical artifacts contain iron.
5.4. Axuste da sensibilidade
Usa o SENSIBILIDADE botóns (+ e -) to adjust the detector's sensitivity. Higher sensitivity increases detection depth but can also lead to more false signals in mineralized ground or areas with electrical interference. Adjust as needed for stable operation.
5.5. Discrimination (NOTCH and Iron Audio)
- NOTCH Discrimination: In Custom mode, you can eliminate specific target segments from detection. Use the DISCRIM button to move the cursor and V/X to toggle segments on/off.
- Audio de ferro: Preme o AUDIO DE FERRO button to activate this feature. It allows you to hear discriminated iron targets at a low tone, even when they are notched out. This helps in identifying complex targets (e.g., a valuable non-ferrous target next to iron) and avoiding large iron objects.
5.6. Axuste de frecuencia
The ACE 400i operates at 10 kHz. If you experience interference from other detectors or electrical sources, press the FREQ ADJ button to slightly shift the operating frequency, which can help mitigate interference.
5.7. Pinpoint Function
Once a target is detected, press and hold the PUNTO button (target icon). Keep the coil steady over the target. The detector will emit a continuous tone, and the signal strength indicator on the LCD will help you center the coil directly over the target for precise location.
6. Mantemento
- Limpeza: Wipe down the detector with a damp cloth after each use. Do not use abrasive cleaners or solvents. The control box is rain-resistant but not submersible.
- Coil Care: Always use the search coil cover to protect the coil from scratches and impacts.
- Substitución da batería: Replace batteries when the low battery indicator appears. Remove batteries if storing the detector for extended periods to prevent leakage.
- Almacenamento: Store the detector in a cool, dry place. Avoid extreme temperatures.
7 Solución de problemas
| Problema | Causa posible | Solución |
|---|---|---|
| Sen poder | Baterías agotadas ou mal instaladas | Substitúa as pilas, asegurándose de que a polaridade sexa correcta. |
| Erratic signals / False signals | High sensitivity, electrical interference, highly mineralized ground, loose coil cable | Reduce sensitivity, use Frequency Adjustment, tighten coil cable, try a different search mode. |
| Poor depth detection | Low sensitivity, highly mineralized ground, small target | Increase sensitivity (if stable), sweep slower, ensure coil is parallel to ground. |
| Pinpoint not accurate | Sweeping too fast, not holding coil steady | Slow down sweep, hold coil motionless over target when pinpointing. |
8. Especificacións
| Característica | Detalle |
|---|---|
| Modelo | ACE 400i |
| Fabricante | Garrett |
| Frecuencia de operación | 10 kHz |
| Modos de busca | 5 (Zero-Disc, Jewelry, Custom, Coin, Relics) |
| Target ID Segments | 12 (including Iron) |
| Iron Discrimination Segments | 6 |
| ID dixital de destino | 0 ao 99 |
| Sensitivity/Depth Adjustments | 8 niveis |
| Apuntar | Si |
| Busca bobina | 18 x 26 cm (7" x 10") PROformance™ DD |
| Lonxitude axustable | Yes (approx. 1.06 m - 1.29 m / 42" - 51") |
| Peso | 1.32 kg (2.9 lb) |
| Fonte de enerxía | 4 pilas AA |
| Tons de audio | 3 (Baixo, Medio, Alto) |
| Clasificación IP | IP67 (Control box is rain-resistant, coil is submersible) |
9. Garantía e soporte
For detailed warranty information, please refer to the official Garrett Metal Detectors website or contact your authorized dealer. Warranty terms and conditions may vary by region.
For technical support, troubleshooting assistance, or spare parts, please contact Garrett Customer Service through their official channels. Always provide your product model (ACE 400i) and serial number when seeking support.
Vídeos oficiais do produto: Non había vídeos oficiais de produtos do vendedor dispoñibles para inserir neste manual.





