Minelab X-Terra 305 / X-Terra 505 Metal Detector Instruction Manual

Congratulations on purchasing your X-Terra!

Metal detecting is a fascinating and rewarding activity enjoyed by people all over the world. By getting to know your X-Terra, you can become one of the many who find valuable coins, relics, and jewelry on a regular basis. The X-Terra is a high-precision instrument incorporating Minelab's proven single frequency technology, VFLEX.

This pocket-sized manual is designed to help both the beginner and expert treasure hunter get the best performance out of the X-Terra 305 and X-Terra 505 models.

An asterisk (*) indicates features only available on the X-Terra 505 model.

VFLEX Technology

The 2nd generation X-Terra Series incorporates Minelab's proven VFLEX Technology. VFLEX uses state-of-the-art digital and mixed-signal components to enhance standard single frequency technology by replacing most of the analogue circuitry with digital signal processing. The small amount of analogue circuitry still employed has been very carefully designed and calibrated to obtain the outstanding sensitivity, stability, and repeatability required to match the performance of the processing in the digital domain.

This radical departure from traditional approaches to metal detector design has been made possible by advances in electronics that power personal digital assistants, cell (mobile) phones, and high-fidelity portable audio equipment.

For the X-Terra user, this precision means dependable performance and improved immunity to environmental conditions such as ground mineralisation, electromagnetic interference, and temperature variations. VFLEX requires coils that are accurately constructed and calibrated. Every time the detector starts up, the micro-controllers in the control box and the coil establish communication through a digital data link. Information about the coil is sent to the control box, so the detector 'knows' what type of coil is attached and can set the correct operating parameters. This optimises the performance and also makes the detector 'future proof', in that it will be capable of operating at different frequencies depending on the electronic properties of the coil.

Diagram Description: A diagram illustrates the signal flow. Standard VLF Signal (Without VFLEX) shows a transmit coil, analog signal, receive coil, and analog signal to the control box. Precision VFLEX Signal shows a Primary Micro (in control box) handling Digital Signal Processing (DSP), Codec, Signal Conversion, Keypad, LCD, and Receive, communicating with a Secondary Micro (in Coil) for Sensing + transmitting coil type, size, frequency via a digital data link. The signal then goes from the coil to the control box.

Assembly

Before assembling your X-Terra, please check that the package includes these parts:

• Coil Skidplate (fitted to coil)
• Lower shaft
• Middle shaft
• Upper shaft
• Armrest Stand
• Control box
• Control box screw
• Rubber washers (2)
• Plastic wing nut
• Plastic bolt
• Armrest screw
• Armrest strap
• Velcro tabs (2)
• Warranty card
• Instruction manual

Connecting the Coil

1. Plug the two rubber washers into the holes on either side of the lower shaft yoke. ?️

2. Slide the yoke into the yoke bracket on top of the coil. Ensure that the spring-loaded pin in the lower shaft is underneath. ?

3. Insert the plastic bolt through the yoke and the yoke bracket. ?

4. Fasten with the plastic wing nut provided, being careful not to damage the thread of the bolt by over-tightening. This may need to be loosened to adjust the coil to a comfortable detecting angle. ?

Note: The coil cable is directly wired into the coil and is not removable. Any attempt to disconnect this cable will void your warranty. ⚠️

Shaft Assembly

1. Ensure that the twistlocks of the shafts are loosened by rotating them counterclockwise. ?

2. Compress the spring-loaded pin in the lower shaft and slide it into the middle shaft until the pin reaches the adjustment holes. The pin will spring out and click into place. ?

3. Attach the middle shaft to the upper shaft in the same way. ?

4. Once shafts are assembled, lock them in position by rotating twistlocks clockwise. ?

Note: The upper shaft assembly location uses two spring-loaded pins to strengthen the joint, one on each side of the shaft. ??

Armrest Assembly

1. Place the armrest onto the top of the upper shaft, lining up the central hole in the armrest with a hole in the aluminium shaft. Position the armrest to suit your arm length. ?

2. Insert the screw up through the stand, upper shaft, and armrest. Tighten the screw, being careful not to overtighten and damage the thread. ?

3. With the velcro side facing upwards, thread the armrest strap through both slots in the armrest. Ensure the end of the strap will be fastened outwards from your arm. (Diagram shows threading for a left arm.) ?

Connecting the Control Box

Connecting: With the LCD facing up, push the control box onto the end of the handle until it fits into place. The control box may be easily removed for packing and transport. ➡️

Disconnecting: Brace the detector firmly against yourself, grasp the control box, and pull it away from the handle. ⬅️

Permanently Connecting the Control Box

While the X-Terra control box is designed to be easily removable, Minelab offers an option to permanently attach it:

1. Remove the small circular rubber insert in the top right-hand side of the handle. ⭕

2. Insert the screw provided into the hole and tighten using a Phillips screwdriver. ?

3. Store the rubber insert in a safe place in case you wish to reuse it. Remember to remove this screw before attempting to disconnect the control box to avoid damage. ⚠️

If this option is not used, the rubber insert may be glued in place using a silicone sealant or other suitable adhesive.

Coil Cable Assembly

1. Wind the coil cable around the lower and middle shaft enough times to take up the slack. 〰️

2. Use the velcro tabs to keep the coil cable in place against the shaft. It is recommended that one tab is used on the lower shaft close to the coil and the other tab on the middle shaft before the cable reaches across to the control box. ?

3. Align the coil plug and connect into the socket in the back of the control box, lightly tightening the retaining ring to hold it in place. ?

Inserting Batteries

The X-Terra uses 4 x AA batteries which are not included with the detector. ?

1. Access the battery compartment via the battery door located on the side of the control box. Slide the battery compartment door upwards with your thumb. ⬆️

2. Place individual batteries into the compartment as illustrated, ensuring the positive (+) and negative () contacts match the diagram on the control box. ➕➖

3. Close the battery door by pushing and sliding it downwards. ⬇️

Note: If the detector does not turn on, check the battery orientation. The detector will not be damaged if the batteries are inserted incorrectly. ?

Detecting Basics

Holding the Detector

1. Thread your arm through the armrest and strap. Grasp the handle of the detector and rest your forearm in the armrest. Your elbow should sit just above the top of the armrest. ?

2. Lightly tighten the velcro strap and secure it around your arm. ?

The correct position of the armrest and length of the shaft should allow you to swing the coil in front of your body without any uncomfortable stretching or stooping. To adjust the length of the shafts, undo the twistlocks, compress the spring pins of the shafts, and move them up or down to suit. Once all shafts are clipped into position, rotate twistlocks clockwise onto the shafts until a firm clamping action is achieved. To adjust the position of the armrest, remove the armrest screw and move the armrest and stand to the desired position. Think of the detector as an extension of your arm; it should be straight with your forearm and feel light and comfortable when you pick it up. ?

Diagram Description: Illustrates correct and incorrect shaft lengths relative to arm position.

Sweeping the Coil

1. Once outside, practice sweeping the coil over the ground in a side-to-side motion, while walking forward slowly. Slightly overlap the previous sweep to ensure a full ground coverage. An approximate sweep speed is 3 seconds from left to right to left. ?‍♀️

2. It is important to keep the coil close and parallel to the ground at all times (approx. 1" / 2.5cm). This will increase detection depth and response to small objects. Avoid excessive brushing of the coil on the ground, as this may result in false signals and inaccurate target IDs. ⬆️

3. A variation in coil height at the end of each swing may also cause confusing sounds and reduce detection depth. ⚠️

Introducing the Control Panel

Keypad functions:

• Power: Turns the detector On or Off. ?
• Menu: Accesses and scrolls through detector settings. ⚙️
• Pinpoint/Detect: Pinpoint assists in locating the exact position of a target prior to recovery. Detect exits menu settings and returns to detection. ?▶️
• Adjust (+/-): Adjusts settings and scrolls to the left () or right (+) through the discrimination segments. ↔️
• Patterns: Scrolls through the different discrimination patterns. ?
• Accept/Reject: Accepts or rejects certain metals by turning on/off individual discrimination segments. ✔️❌
• Ground Balance: Activates the manual Ground Balance adjustment to compensate for different types of soil. ⛰️

The detector also features a Liquid Crystal Display (LCD) area. ?️

Keypad Layout

Diagram Description: Shows the keypad layout for the X-Terra 305 and X-Terra 505 models, indicating the position of each button.

Turning on the Detector

There are many metallic objects inside the house (e.g., nails in the floor, reinforcing in the walls) that will result in overloading the detector's electronics. There may also be interference from TV sets and other household appliances. In this environment, the detector may give erratic performance and numerous false signals. It is best to only turn the detector on when outside, away from sources of electromagnetic disturbance. ?➡️?

Press the Power button. A short start-up sequence will display and a tune will be heard. Once on, the detector will be in automatic detection mode. There will be no numeric reading until a metal object is detected. ?

Note: Overloading (displaying 'OL') is not harmful to the detector's electronics. If the detector emits an overload sound and displays OL, move the coil away from the source of the overload. ⚠️

Many of the screen pictures in this manual that refer to both models show the X-Terra 505 display only. ?

LCD Layout

Diagram Description: Illustrates the LCD layout for X-Terra 305 and X-Terra 505. Shows a blank detection display (two dashes) and notes that LCD icons are never all shown at the same time.

The blank detection display shows no numerical reading until a detection is made. ➖

A Simple Detecting Exercise

A good way to become familiar with detecting is to test the detector against a range of metal objects. This exercise is a simple lesson on how the detector interprets metal objects. Gather a collection of different metal objects, e.g., various coins, gold and silver jewelry, a rusted nail, pull-tab, brass button, and aluminum foil. Take the detector outside, away from known electromagnetic fields or metal objects. ???

1. Lay objects in a line, sufficiently spaced apart to allow the coil to pass between the objects. ?

2. Pass the coil across the objects, one at a time, and observe the LCD and the detector's sounds as it detects each object. ?

3. Note: If you are getting signals from a clear patch of ground, there may be unknown buried metal objects. ❓

4. Before attempting to pinpoint or recover real targets, it is important to understand how to interpret the audio and visual responses correctly. This test exercise can be used when adjusting the detector's settings.

If the detector is making popping and crackling sounds and displaying numbers when the coil is not over one of the metal objects, try reducing the detector's Sensitivity. Once stable, the detector will only sound and display numbers when the coil is passed over a target. ?➡️?

The X-Terra coil is waterproof. ?

Example Detections

Discrimination Pattern (e.g., Pattern 1): Rejects ferrous metals and foil, accepts nonferrous metals.

• Audio: A detected nonferrous target will give a medium to high tone audio response. ?
• Visual: A detected nonferrous target will give a visual indication within the nonferrous section of the discrimination scale and a positive target ID. A target ID segment will flash quickly 3 times to show its position on the scale, then flash slowly until another target ID is detected. Depth icons indicate approximate depth (e.g., 4 icons for 6-8" / 15-20cm). ⬆️

All Metal Pattern: Turns off every discrimination segment, allowing all metals including ferrous targets to be detected.

• Audio: A detected ferrous target will give a low tone audio response. ?
• Visual: A detected ferrous target will give a visual indication within the ferrous section of the discrimination scale and a negative target ID. Depth icons indicate depth (e.g., 1 icon for 0-2" / 0-5cm). ⬆️

Diagram Description: Shows a nonferrous coin detection with a medium-high tone, positive ID, and depth icons. Shows a ferrous nail detection with a low tone, negative ID, and fewer depth icons.

Further understanding of detector basics and detailed detector operation may be obtained from the rest of this manual.

How Detectors Work

Metal detectors work due to the fact that metal is conductive. Metal detectors create an electromagnetic field, which penetrates the ground. When the coil senses a change in this field (caused by a metal object), it sends a signal back to the control box, which then alerts the operator. Metal detectors react to the size, shape, and composition of objects. Typically, the larger the object, the deeper it can be detected. The X-Terra uses a single frequency (7.5kHz) as the standard operating frequency. This frequency has the ability to penetrate deep into the ground. The frequency of a detector is the number of times a signal is transmitted into the ground and received back, per second (measured in Hertz - Hz). ⚡️

Diagram Description: A simplified diagram showing a coil emitting an electromagnetic field, a metal object in the ground altering the field, and the altered field sending a signal back to the detector.

Target ID

Buried metal objects are referred to as targets. As the coil is passed over a target, it detects its conductivity and displays this as a number. Target Identification (ID) is used to distinguish one type of metal target from another.

• X-Terra 305: Target ID numbers range from -4 to 44.
• X-Terra 505: Target ID numbers range from -9 to 48.

Negative numbers represent ferrous targets, and positive numbers represent nonferrous targets. The last detected target ID stays on the display until another target is detected. If the detector passes over a target that it rejects, the display will return to a blank detection screen represented by two dashes. ➖

Depth Indicator

The depth indicator is a relative guide to how deep a target is. The more arrows displayed, the deeper the target is likely to be.

• 1 arrow: approx. 0-2" (0-5 cm)
• 2 arrows: approx. 2-4" (5-10 cm)
• 3 arrows: approx. 4-6" (10-15 cm)
• 4 arrows: approx. 6-8" (15-20 cm)
• 5 arrows: approx. 8-10" (20-25 cm)

Actual depth will be more accurate for coins than for junk ferrous targets. ⬆️

Discrimination Scale

In addition to the Target ID, targets are also represented as a particular segment on a linear scale at the bottom of the display. Each discrimination segment represents a level of conductivity and ferrous content.

• Nonferrous targets are those that have no iron content, such as gold, silver, copper, and bronze. Nonferrous targets are often higher in conductivity and are represented by the right-hand side segments. ?
• Ferrous targets are those that contain iron, for example, nails and scrap metal. They generally have a low conductivity and are represented by the left-hand side segments. ?

Desired and undesired targets may appear anywhere along the discrimination scale. Discrimination segments can be accepted (disappear) or rejected (appear black). The combinations of accepted and rejected segments are referred to as patterns. ?

Diagram Description: Shows the discrimination scale with segments labeled for ferrous and nonferrous. Examples of desired/undesired targets are shown on the scale (e.g., Canadian coin, iron nail, gold coin, pull tab).

• X-Terra 305: Has 12 segments. Target IDs range from -4 up to 44, increasing in steps of 4.
• X-Terra 505: Has 19 segments. Target IDs range from -9 up to 48, increasing in steps of 3. The more segments available, the more separate target IDs are available.

Preset Discrimination Patterns

The combinations of accepted and rejected segments are referred to as patterns. The X-Terra has preset discrimination patterns that have been customised to detect general desired targets such as coins and jewelry. Patterns are an important part of detecting as they can save you from digging for unwanted targets.

• X-Terra 305: Has an all metal pattern and 2 preset patterns.
• X-Terra 505: Has an all metal pattern and 3 preset patterns.

Patterns 1, 2, and 3 (on 505) can be edited to create your own custom discrimination patterns. Edited patterns are automatically saved and remembered even if the batteries are removed. (Editing Discrimination Patterns, pp. 60-61; Erasing Patterns, p. 62)

All Metal Pattern: Accepts signals from all types of metals, everything from jewelry to rusty nails (all Target IDs). No target signals are rejected. ? (All IDs)

Pattern 1: Accepts signals from nonferrous targets, e.g., gold and silver coins.

• X-Terra 305 IDs: 8, 12, 16, 20, 24, 28, 32, 36, 40, 44.
• X-Terra 505 IDs: 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48.

Rejects ferrous objects and nonferrous aluminum foil.

• X-Terra 305 IDs: -4, 4.
• X-Terra 505 IDs: -9, -6, -3, 3.

Diagram Description: Shows example targets for Pattern 1.

Pattern 2: Accepts signals from most nonferrous targets.

• X-Terra 305 IDs: 16, 20, 24, 28, 32, 36, 40, 44.
• X-Terra 505 IDs: 9, 12, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48.

Rejects those from ferrous objects and some nonferrous targets, e.g., aluminum foil and pull tabs.

• X-Terra 305 IDs: -4, 4, 8, 12.
• X-Terra 505 IDs: -9, -6, -3, 3, 6, 15, 18.

Diagram Description: Shows example targets for Pattern 2.

Pattern 3* (X-Terra 505 only): Accepts signals from most nonferrous targets.

• X-Terra 505 IDs: -3, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48.

Rejects those from ferrous objects and some nonferrous targets, e.g., aluminum foil and pull tabs.

• X-Terra 505 IDs: -9, -6.

Diagram Description: Shows example targets for Pattern 3.

Choosing a Discrimination Pattern

X-Terra 305

On the X-Terra 305, the Patterns button toggles between pattern 1 and 2. The X-Terra 305 has an All Metal shortcut button, which toggles between the selected pattern and the all metal pattern. The all metal pattern cannot be edited. ?

X-Terra 505

On the X-Terra 505, the Patterns button toggles between pattern 1, 2, and 3. The X-Terra 505 also has an All Metal shortcut button, which toggles between the selected pattern and the all metal pattern. The all metal pattern cannot be edited. ?

Pinpointing

During normal detection, the X-Terra operates with discrimination patterns. When a target signal is heard, it is advantageous to identify the target's exact position using the Pinpoint button. ?

Enabling pinpoint instructs the X-Terra to temporarily disengage discrimination and become a non-motion detector. Targets normally discriminated against will emit a signal when beneath the coil. In pinpoint, the detector gives a continuous audio response as opposed to a single beep while detecting. This continuous response indicates the strength of the target signal directly below the coil. The pinpoint audio response is tone and volume modulated. The difference in tone and volume produced will help in locating the target's position and depth.

Diagram Description: Shows how tone and volume change with proximity to a target. A loud, high tone and high volume indicate the target is directly under the coil's center. A quiet, low tone and low volume indicate the target is further away.

The detector may become noisy if left in pinpoint. If this occurs, return to normal detection before trying pinpoint again. ⚠️

1. Once the approximate target location is known, move the coil outside of that area and press Pinpoint. ?

2. Sweep the coil over the target location. The menu scale segments on the LCD indicate how close the target is to the center of the coil. The detector will only produce a high volume when the center-ring of the concentric coil is directly above the target. ?

3. Taking note of the detector's response, reduce the span of each successive pass of the coil until you are confident of the target's location. Make a mental note of the position or, if the ground is sandy, mark a line with your shoe or a digging tool. ✍️

4. Move to one side so that you can pass the coil over the target at a right angle to your initial direction. When the detector sounds, you should know exactly where to dig. ⛏️

Diagram Description: Shows the LCD with menu scale segments indicating proximity to the target center.

If you have difficulty pinpointing the target, press Pinpoint/Detect again to take the detector out of pinpoint and then return to Step 1. ❓

Recovering the Target

A trowel, knife, or small spade are good tools for recovering targets. ?️

1. Once a target has been located, clear the surface of loose material and check again for a signal. If there is no signal, the target is amongst the surface material. In this case, search the surface material until the target is located. If the target is still in the ground, check again with pinpoint. ?

2. The aim when digging is to leave the area of ground exactly as you found it. Using a sharp tool, cut a neat portion of grass or soil and place it on a plastic sheet. This prevents the material being scattered and allows the hole to be refilled. ♻️

Ask for permission before searching on private property. ?

3. A long blunt-tipped screwdriver is a good tool for soft ground. Probe the soil to find the exact location of a target; if it is very shallow, simply prise it out. ?

4. Check the hole for the target. If it is not in the hole, place the detector on the ground with the coil flat, pick up a handful of soil, and pass it over the coil. Be sure not to wear rings, bracelets, or watches, which will produce a signal. Repeat this procedure until the target is located. ✋

5. Ensure that no other targets remain, then refill the hole. All soil and portions of grass on the plastic sheet should be returned to the hole as neatly as possible. Step lightly on the soil to compact it. ?

Leaving holes or a scarred area may result in action being taken to prevent the use of metal detectors. Please ensure that you leave an area of ground as it was found. Try to take all rubbish. ?

LCD Icons

Target ID: Target signals contain both ferrous and conductivity information. This is digitally processed and results in a number being displayed that distinguishes between different types of metal.

• X-Terra 305: Target ID numbers range from -4 to 44.
• X-Terra 505: Target ID numbers range from -9 to 48.

Negative numbers represent ferrous targets, and positive numbers represent nonferrous targets. These numbers also function as numerical values when adjusting menu settings (Sensitivity, Noise Cancel, Threshold, Volume, Tones, and Ground Balance). ?

All Metal (AM): Indicates that the all metal pattern has been selected. This pattern has no discrimination and will allow signals from all types of metals, both ferrous and nonferrous. ?

Patterns: Preset discrimination patterns are used to suit different search preferences. X-Terra 305 has 2 patterns; X-Terra 505 has 3 patterns. (Preset Discrimination Patterns, p. 30)

Depth Indicator: The depth indicator is a relative guide to how deep a target is. The more arrows displayed, the deeper the target is likely to be.

• 1 arrow: approx. 0-2" (0-5 cm)
• 2 arrows: approx. 2-4" (5-10 cm)
• 3 arrows: approx. 4-6" (10-15 cm)
• 4 arrows: approx. 6-8" (15-20 cm)
• 5 arrows: approx. 8-10" (20-25 cm)

Actual depth will be more accurate for coins than for junk ferrous targets. ⬆️

Diagram Description: Shows a shallow target with 1 arrow and a deep target with 4 arrows.

Menu: The X-Terra has a list of settings (Sensitivity, Noise Cancel, Threshold, Volume, Tones, and Ground Balance) that can be adjusted to customise it for your personal preferences. Note: Ground Balance cannot be accessed via the menu key, even though it is in the menu list on the LCD. ⚙️

Menu Scale: Consists of 10 segments and a circular scale line. This works in conjunction with the numeric ID to show the value of the selected setting adjustment. The menu scale also works with pinpoint to indicate how close the coil is to the target. ?

Pinpoint: Indicates that pinpoint is activated. ?

Battery: This icon indicates how much power is left in the batteries. (Battery Behaviour, p. 68) ?

Headphones: This icon indicates that the headphones are connected and that the headphone volume has been selected. (Accessories, p. 72) Headphones are not included with the X-Terra. ?

Reject Identification: This icon appears when rejecting a discrimination segment. It disappears when accepting a discrimination segment. (pp. 60-61) ✔️❌

Operation

The X-Terra operates in two display states: Detection and Settings.

Detection: The Target ID, discrimination segments, and depth automatically translate detected signals. The last detected Target ID stays on the display until another is detected. If the detector passes over a target that it rejects, the display will return to a blank detection screen represented by two dashes. ➖

Diagram Description: Shows the Detection screen with Target ID, Depth, and Discrimination segments. Also shows a discriminated (rejected) segment and an accepted segment.

Settings: The X-Terra has a range of settings that should be adjusted to ensure optimum performance in different environments. These settings can be accessed from the menu. Ground Balance can be accessed via the shortcut button. To access the menu settings, press Menu. Press repeatedly to scroll through the menu settings.

Diagram Description: Shows the Settings screen with options for Noise Cancel, Sensitivity, Threshold, Tones, Volume. Also shows the Pinpoint/Detect button to exit settings.

After exiting settings using Pinpoint/Detect, the last detected Target ID will disappear, and the depth icons will flash in sequence until a new Target ID is detected.

Selecting Menu Settings

Press Menu to enter the settings menu. Scroll through the settings using the Patterns button. Use the Adjust (+/-) buttons to change the value of the selected setting. Press Pinpoint/Detect to exit settings and return to a blank detection display. ⚙️

The menu settings available are: Sensitivity, Noise Cancel, Threshold, Volume, and Tones. Ground Balance is accessed via its dedicated button. ⛰️

Sensitivity

The X-Terra detectors are highly sensitive and therefore have a wide sensitivity adjustment range. It is important to set the correct sensitivity level for your detecting conditions. Sensitivity is the detector's level of response to a target and its environment. Real targets are interpreted as distinct beeps. Interference or false targets are interpreted as crackling or popping noises. Tiny ferrous junk targets may be detected when the sensitivity is set to a high level. The detector will also be affected by minerals in certain soils and signals from other electric appliances.

Some experimentation with the sensitivity may be required for different areas. For beginners, start with a low setting and increase progressively. Decreasing the X-Terra's sensitivity may help stabilise the detector, reducing false signals and interference, and assisting in differentiating between signals caused by soil mineralisation and those of metal targets. Choose the highest stable sensitivity setting to ensure the detector's optimum performance. Do this by holding the coil stationary; increase the Sensitivity until the detector becomes unstable; then reduce the Sensitivity by one or two settings until it is stable.

For beach detecting, a setting below 10 (5 for the 305) may be required. In high trash areas, such as modern parks, a setting below 6 (3 for the 305) may be required, especially when searching for shallow coins.

• X-Terra 305 Sensitivity range: 1-10 (Factory Preset: 6)
• X-Terra 505 Sensitivity range: 1-20 (Factory Preset: 12)

The highest sensitivity settings (7-10 for X-Terra 305; 15-20 for X-Terra 505) should only be used in the quietest, most stable conditions. ⚠️

Adjusting Sensitivity

Use the Adjust (+/-) buttons to increase or decrease the sensitivity level. The menu scale and numeric ID will indicate the selected setting. ↔️

Noise Cancel

The detector may become noisy or erratic due to electrical interference from powerlines, electrical equipment, or other detectors operating close by. This interference is interpreted as a crackling or popping noise. Noise Cancel allows you to change the noise cancel channel so that you experience less interference.

• X-Terra 305 Noise Cancel: -1, 0, 1 (Factory Preset: 0)
• X-Terra 505 Noise Cancel: -2, -1, 0, 1, 2 (Factory Preset: 0)

Three channels are available for the 305, and five channels for the 505. These are indicated on the menu scale. It is best to choose a channel with the coil in the detection (horizontal) position because interference received in a vertical position may be different from that received in the horizontal position. The coil should be held in the air and away from large targets when changing channels.

There is no loss in depth or sensitivity if the Noise Cancel channel is changed. ?

Choosing a Noise Cancel Channel

Navigate to the Noise Cancel setting using the Menu button. Use the Adjust (+/-) buttons to select a channel. When a channel is selected, the menu scale segments will flash, followed by a beep. ⚙️

Threshold

Threshold is the constant background sound produced by the detector to help distinguish between desirable and undesirable targets. When a rejected target is detected, the Threshold sound 'blanks' (becomes silent) to indicate that a rejected target is underneath the coil.

The X-Terra 305 and 505 can save separate settings for both the speaker Threshold and headphones Threshold, switching from one to the other automatically as headphones are connected. When headphones are unplugged, all changes to the Threshold setting apply to the speaker Threshold. When headphones are plugged in, the headphones icon will be displayed, and all changes apply to the headphones Threshold.

The Threshold volume should be set to the preferred level. It is important to note that small surface objects, as well as large deep objects, will produce very small changes in the Threshold sound. It is therefore important to set the Threshold control correctly to ensure that these targets are heard. Try experimenting with known targets to assist in setting this control.

• X-Terra 305 Threshold range: -5 to 25 (Speaker Factory Preset: 12; Headphones Factory Preset: 10)
• X-Terra 505 Threshold range: -5 to 25 (Speaker Factory Preset: 12; Headphones Factory Preset: 10)

Adjusting Threshold

Navigate to the Threshold setting using the Menu button. Use the Adjust (+/-) buttons to increase or decrease the threshold level. The menu scale and numeric ID will indicate the selected setting. ?↔️

Volume

Volume is the level of sound the detector gives when a target is detected. The volume control limits the potential loudness of target signals. The X-Terra has proportional target signal volume: the sound produced by a distant target starts softly. As you get closer, the volume level increases rapidly until it reaches the maximum level that has been set. The sound produced by the detector in pinpoint or ground balance will vary in volume and tone depending on the signal strength (from a target or ground mineralisation). This volume range is proportional to the maximum volume setting.

The X-Terra can save separate settings for both the speaker volume and headphone volume, switching from one to the other as soon as headphones are connected. (Accessories, p. 72)

Set the speaker volume without headphones connected. Set the headphone volume with the headphones connected. Use the exercise (p. 22) with different targets to confirm both volume settings.

When the detector battery is low (indicated by the low battery icon), the speaker volume limit will be reduced to save battery power and extend detecting time. You may choose to override this and increase the volume limit, but you then risk the detector shutting down earlier.

• X-Terra 305 Volume range: 0 to 10 (Speaker Factory Preset: 8; Headphones Factory Preset: 5)
• X-Terra 505 Volume range: 0 to 30 (Speaker Factory Preset: 25; Headphones Factory Preset: 20)

Adjusting Volume

Navigate to the Volume setting using the Menu button. Use the Adjust (+/-) buttons to increase or decrease the volume level. The menu scale and numeric ID will indicate the selected setting. ?↔️

Tones

The number of Target ID Tones may be selected from the Tones menu. There are 4 different options for the X-Terra 305, and 5 for the X-Terra 505.

• 1 Tone: 130Hz
• 2 Tones: 130Hz, 450Hz
• 3 Tones: 130Hz, 450Hz, 700Hz
• 4 Tones* (X-Terra 505): 130Hz, 450Hz, 700Hz, 950Hz
• Multiple Tones (X-Terra 505): Pitch can vary during target detection in the 130Hz-950Hz range. The pitch depends on the Target ID determined during detection.

Adjusting Tones

Navigate to the Tones setting using the Menu button. Use the Adjust (+/-) buttons to cycle through the tone options. The menu scale and numeric ID will indicate the selected setting. ?↔️

Ground Balance

The X-Terra 305 and 505 have an adjustable ground balance which helps in compensating for false signals caused by mineralised soil. Ground balancing the detector reduces false detections and enables good targets to be displayed and heard correctly. When the detector is unbalanced, it will detect targets, but it may also register false detections due to ground mineralisation. These false detections are displayed as -9 (on 505) or -4 (on 305) in All Metal mode, or as two dashes when using factory preset patterns. This will cause good targets to be displayed only briefly and with a clipped sound.

Ground balance settings affect both normal discrimination detection and pinpoint operation. If there is difficulty ground balancing in an area with the X-Terra, try reducing the Sensitivity (p. 46).

• X-Terra 305 Ground Balance range: 0 to 20 (Factory Preset: 6)
• X-Terra 505 Ground Balance range: 0 to 50 (Factory Preset: 15)

When detecting on the beach, adjusting ground balance may not give significant improvements. Try adjusting sensitivity and altering patterns for best results. Highly mineralised soil may produce false signals and distract from real targets. Mineralised ground and 'hot rocks' may register as -9 when detecting in all metal. This is more likely to happen at high sensitivity settings and with an unbalanced detector.

Adjusting Ground Balance

1. Using the detector in All Metal mode, find a clear area of ground without any targets. ?

2. Hold the coil parallel and approximately 4" (10 cm) above the ground. Select the Ground Balance button. A constant hum known as the Ground Balance tone will sound when the coil is held steady. ?

3. Continuously lower and raise the coil towards and away from the ground and listen to the Ground Balance tone. Try to lower the coil as close to the ground as possible without touching it. ⬇️⬆️

4. Adjust the Ground Balance using the Adjust (+/-) buttons, listening for minimum volume, which will occur during the transition from low to high. If the tone is low, increase the Ground Balance setting using '+'; if the tone is high, decrease the setting using '-'. The menu scale and numeric ID will indicate the chosen setting. ↔️

If ground balance is set between two numbers, select the lowest number. ?

Editing Discrimination Patterns

Method 1 – To reject a specific target ID using an actual target

1. In detection mode, a discrimination segment will flash, indicating its position on the discrimination scale and the target's ID number will appear on the LCD. ?

2. Press the Accept/Reject button to reject that target ID. The discrimination segment and icon will appear (shaded), and the target ID number will disappear to indicate the rejected ID. ✔️➡️❌

3. Check that the target ID has been rejected by detecting again. There should be no audio response from that target ID. ?

Method 2 – To reject a specific target ID using + or –

1. In detection mode, use the Adjust (+/-) buttons to scroll through and select the ID you want to modify. The flashing segment and the target ID numbers will indicate the selected ID. ↔️

2. Press the Accept/Reject button to either accept or reject that ID. The discriminated segment and the icon will appear (shaded) if rejected. The segment and icon will disappear if accepted. ✔️/❌ toggles between accepting and rejecting targets.

The All Metal pattern cannot be edited. ⚠️

Erasing Patterns

Custom patterns are saved when the X-Terra is switched off. To erase custom patterns and return to preset patterns:

1. Turn the detector off. ?

2. While pressing and holding the Pattern button, turn the detector back on by pressing Power once. ?

3. During the start-up sequence, release the Pattern button. ✋

4. After the start-up sequence, the 'Patterns Erased' message (PE) will appear for 3 seconds to indicate that the current patterns have been erased and returned to the preset patterns. ✅

Factory Presets

The settings Sensitivity, Ground Balance, Noise Cancel, Threshold, Volume, and Tones are saved when the X-Terra is switched off. To return to the preset menu values:

1. Turn the detector off. ?

2. While pressing and holding the Menu button, turn the detector back on by pressing Power once. ?

3. During the start-up sequence, release the Menu button. ✋

4. After the start-up sequence, the 'Factory Preset' message (FP) will appear for 3 seconds to indicate that Sensitivity, Ground Balance, Noise Cancel, Threshold, Volume, and Tones have returned to the preset values. ✅

Sounds

Start Up Sequence: When the detector is turned on, there is a short three-note tune during its start-up sequence. ?

Positive Acknowledgement: The detector emits a short beep for every accepted key press. ✅

Negative Acknowledgement: The detector emits a low double beep to indicate an invalid keypress. ❌

Patterns Erased / Factory Preset: A six-note tune will announce when these settings are complete. ?

Error: A six-note tune will sound to indicate a detector error. (Error Messages, p. 66) ❓

Overload: If the coil is passed across a large shallow target, the detector will give a repeating buzzing sound. This indicates that the target signal is too strong for the detector to interpret. This will appear until there is no more overload. ?

Low Battery Signal: When the battery power becomes low, there will be a short announcement tune (descending tones) every 60 seconds. ?

Low Battery Shutdown: A long announcement tune (descending tones) will sound just before the detector shuts down. ?➡️?

Noise: A random jittery sound indicates that the detector is picking up external interference. Sensitivity or Noise Cancel should be adjusted. ?

Target Response: This is the sound given by the detector when a target is located and not discriminated against (rejected). Generally, a target that is highly conductive (e.g., a large silver coin) emits a high tone beep. A low tone beep is produced for ferrous targets. ?

False Detections: A partial or chopped non-repeatable signal. Two dashes will indicate on the LCD to indicate a rejected target. ➖

Pinpoint Response: When in pinpoint, the detector emits a variable tone that increases in pitch and volume as the coil gets closer to the target. ??

Error Messages

Once all errors are resolved, the detector will begin operation with a blank detection screen.

• Coil Unplugged: The coil has been disconnected from the detector. The menu scale line icon will slowly flash until the coil is plugged back in. Turn the detector off before connecting a standard coil. ?❓
• Coil Error: The coil is not communicating with the control box. Turn the detector off before connecting a standard coil. ❓
• Coil Incompatible: The coil is communicating with the control box, but the detector is not recognising it. Turn the detector off before connecting a standard coil. ❓
• Overload: The detector has received a signal that is too strong for it to interpret. This will appear until there is no more overload. Take the coil away from the source of overload. ⚠️

Diagram Description: Shows the LCD with the menu scale line icon flashing, indicating an error state.

Coil Identification

The X-Terra Series are capable of operating at different transmission frequencies set by VFLEX compatible coils: Low (3kHz)*, Standard (7.5kHz), and High (18.75kHz).

To view the type of coil:

1. Press Menu to enter the settings screen.
2. Press and hold Accept/Reject to view the coil identification screen.
3. Release Accept/Reject to return to settings.
4. Press Pinpoint/Detect to return to detection.

The X-Terra Series operate with Concentric (c) and Double D (d) coils.

• Concentric Standard Frequency
• Concentric Low Frequency
• Concentric High Frequency
• Double D Standard Frequency
• Double D Low Frequency
• Double D High Frequency

Battery Behaviour

The X-Terra is capable of using different types of AA batteries:

• 1.5V Alkaline
• 1.5V Carbon
• 1.5V Lithium (non-rechargeable)
• 1.2V NiMH (rechargeable)
• 1.2V NiCad (rechargeable)

Rechargeable Lithium Ion batteries will give a combined voltage above 8V and therefore cannot be used with the X-Terra. ⚠️

When the detector battery is low, the speaker volume limit will be reduced to save battery power and extend detecting time. The headphone volume is not affected.

• Overvoltage: If the battery voltage is too high (above 8V), the battery icon will flash and the detector will shut down. ?⚡️
• Full: 2 black segments inside the outline.
• Half: 1 black segment inside the outline.
• Low: The icon will begin to flash for a period of time, and there will be audio announcements every 60 seconds before the detector finally shuts down. ?

The use of headphones will increase battery life. ?

Diagram Description: A graph shows battery discharge over time for 1.5V Alkaline and 1.2V NiMH/NiCad batteries.

Care of Your X-Terra

The X-Terra is a high-quality electronic instrument, finely engineered and packaged in a durable housing. Taking proper care of your X-Terra is common sense.

Storage Temperature: -4°F to 149°F (-20°C to +65°C). Operating Temperature: 32°F to 113°F (0°C to 45°C). Do not leave the detector in excessive heat or cold for longer than necessary. Try to avoid leaving it in a closed trunk or in a car sitting in the sun. Covering it when not in use will help protect it. ☀️❄️

The coil can be submerged in water up to 20" (0.5m), yet the control box is not waterproof. Although it has been designed to be weather-resistant, it is advised to protect the control box in wet conditions. A protective control box cover is available. (Accessories, p. 72) ?

Never allow the detector to come into contact with gasoline or other petroleum-based liquids. ⛽️

Keep the detector clean and dry and avoid getting sand and grit into the shafts or fastenings (e.g., yoke, twistlocks). Do not use solvents to clean the detector. Use a damp cloth with mild soap detergent. ?

The display window may be prone to scratching or damage if not treated with care. A protective control box cover is available. (Accessories, p. 73) ?️

Ensure the coil cable is in good condition and not subject to undue stress (particularly where it is connected to the coil). Always remember to turn off the detector before changing coils. Coils from other models of Minelab detectors will not function with the X-Terra Series. (Accessories, p. 73) Only VFLEX compatible coils will operate correctly with the X-Terra Series.

Old, flat, or faulty batteries may cause many detector problems through electrolyte leakage. Take the batteries out if the detector will not be used for long periods of time (e.g., more than 1 week). Ensure that only good quality batteries are used and that they are replaced when the low battery signal sounds. Do not use rechargeable Lithium Ion batteries as their voltage is too high. Non-rechargeable Lithium batteries may be used. ?

Accessories

Headphones have many advantages. They block out external noise such as wind and traffic, allowing you to listen more closely to target signals. Headphones also minimize disturbance to other people in the area and extend battery life. ?

The X-Terra is able to save separate settings for both the speaker volume and headphone volume, switching from one to the other as soon as the headphones are connected. (Volume, p. 52)

Ensure that the headphone volume does not reach an extremely loud level, as this may increase the risk of hearing damage. ?

When not using headphones, keep the rubber cover closed to protect the control box electronics from moisture and dust.

Connecting Headphones

Always use headphones with a 1/4" jack. Open the rubber headphone cover located on the left-hand side of the control box. Plug the headphone jack into the socket. When the detector is turned on, the headphones icon will appear on the LCD to indicate that the headphones are connected.

Skid Plate

A skid plate comes as standard with the detector. If it wears out from excessive sweeping along the ground, accessory skid plates are available for purchase. ?️

Environmental Cover

Protects the control box from environmental conditions such as rain and dirt. ☔

Accessory Coils

Accessory coils come in different types (Double D and Concentric), sizes, and frequencies. These coils are suitable for different ground conditions and specific targets. To attach an accessory coil:

1. Turn the detector off using Power.
2. Follow the steps of Coil Cable Assembly (p. 13) and Connecting the Coil (p. 8) in reverse order to disconnect the coil from the detector.
3. Repeat the same steps in the correct order to connect a different coil.
4. Turn the detector on using Power.

Short Shaft

A short shaft is available to decrease the length of the detector. ?

X-Terra Specifications

In the interest of product improvement, Minelab reserves the right to make changes without notice. ?

X-Terra Model Features

Quick Start Instructions

These quick start instructions allow you to begin detecting straight away and find important reference information for setting up your X-Terra.

1. Turn on (p. 20)
2. Choose a Discrimination Pattern (pp. 30-35)
3. Adjust Sensitivity (p. 46) and Volume (p. 52)
4. Choose a Noise Cancel channel (p. 48)
5. Adjust Ground Balance (p. 56)
6. Begin detecting!

Minelab encourages all users to read the entire manual to ensure a complete understanding of all the X-Terra features and functions. ?