CONRAD MD-810 Metal Detector User Manual

CONRAD MD-810 Metal Detector

Product Information: Metal Detector MD-810

Item no.: 2632374

MD-810 is a metal detector that is designed for outdoor use. It is equipped with a search coil that detects metal objects buried beneath the ground surface. The detector has adjustable sensitivity settings that can be used to reduce electromagnetic interference. It also has a pinpoint mode that allows for accurate location of metal objects.

Product Usage

1. Before using the MD-810, read the user manual carefully and become familiar with the function of the device.
2. When detecting, move the search coil at a constant speed. Let the search coil be parallel with the ground and about 1/2 inch from the surface, do not swing it like a pendulum.
3. The depth indication is accurate for coin-sized objects. Large objects or irregularly-shaped objects will reduce accuracy.
4. Most of the valuable metal objects will send consistent signals. If the signal isn’t consistent, it’s mostly a false signal.
5. If the pinpoint mode malfunctions, sending a signal even when not close to any metal, lift the detector in the air, press the P-P button once to solve the problem.
6. Adjust the length of the stem to make it comfortable for you to detect with your arm straight. Wind the cable of the search coil around the aluminum stem, elastic moderate, let it not sway. Plug the cable plot into the lower right of the control box, aim at the slot, and plug into the end.
7. Adjust the position of the bracket arm. Loosen the screw under the bracket arm, making the bracket arm release up and down, remove the bracket arm, and move it forward to a certain position, then tighten the screws.
8. Use two 9V alkaline battery. Open the battery cover and install the battery according to the polarity sign in the battery box, let the ribbon be under the battery. If you are not going to use the detector for a long time, please remove the battery from the battery case.
9. Put the detector on a wooden or plastic table, and let the search coil stretch out of the table about 30cm, keep away from walls, ceilings, and floors, turn off all kinds of electrical appliances that will cause electromagnetic interference, remove watches and rings from hands.

Thank you for choosing our Metal Detector MD-810. Please read this manual carefully and become familiar with the function of MD-810 before use. After reading, please keep it safe for future reference.

TIPS

1. MD-810 is used for outdoors. There are too many interferences indoors.
2. In the higher sensitivity range, the detector will be more sensitive to electromagnetic interference. By reducing sensitivity you can get rid of interference.
3. When detecting, move the search coil at a constant speed. Let the search coil be parallel with the ground and about 1/2 inch from the surface, do not to swing it like a pendulum.
4. The depth indication is accurate for coin-sized objects. Large objects or irregularly-shaped objects will reduce accuracy.
5. Most of the valuable metal objects will send consistent signals. If the signal isn’t consistent, it’s mostly a false signal.
6. The Panel LCD will automatically turn off every 10 minutes. Hold vol button for 2 seconds to lighten it again.
7. If the pinpoint mode malfunctioned, sending a signal even when not close to any metal, lift the detector in the air, press the P-P button once to solve the problem.

SPECIFICATIONS

• Operation Mode: 4+1
• Motion Mode: ALL-METAL,DISC, MEMORY, JEWELRY Non-motion Mode: PINPOINT
• Coins Depth Indication: 2’’,4’’,6’’,8’’ and+
• Sensitivity Control : 5 grades
• Target Metals Discrimination: 6 kinds 0 to 99 double digits
• Signal Strength Indication :5 grades
• Sound Frequency: 3 kinds of frequency indicating different metals
• Volume Indication: 3 grades
• LCD Backlight: White
• Battery Indication: 4 grades
• Turn off prompt: s ound a prompt tone every ten minutes
• Search Coil: waterproof search coil
• Earphone Jack: 1/8 inch earphone jack (earphone not supplied)
• Power Supply: two 9V alkaline battery

ASSEMBLY

The structure of MD-810 is shown in Fig.1 below.

1. Loosen the lock knob on the lower stem, take down the bolt.
2. install the lower stem on the search coil, and lock it tightly (See
3. Fig.2). Note that the rubber gasket should be placed correctly.
4. Loosen the lock nut on the middle stem, press the silver button on the lower stem, insert to the middle stem (See Fig.3).
5. Loosen the lock nut on the other end of the middle stem. Press the silver button on the upper stem, and insert it into the other end of the middle stem (see Fig.4).
6. Adjust the length that the lower stem inserts to the middle stem.
7. Also, you can adjust the total length of the stem, making you detect comfortable with your arm straight.
8.  Wind the cable of the search coil around the aluminum stem,
9. elastic moderate, let it not sway. plug the cable plot into the
10. lower right of the control box, aim at the slot, and plug into the
11. end (see Fig.5). Note do not pull the cable, pull the plug.
12. Adjust the position of the bracket arm. loosen the screw under
13. the bracket arm, making the bracket arm release up and down,
14. remove the bracket arm and move it forward to a certain
15. position, then tighten the screws(see Fig.6).

BATTERY

Please use two 9V alkaline battery. Open the battery cover and install the battery according to the polarity sign in the battery box, let the ribbon be under the batter. If you are not going to use the detector for a long time, please remove the battery from the battery case.

PANEL(LCD and Button)

LCD

• Mode Cursor: indicate the operation mode, altogether divided into four kinds.
• Target ID Cursor: divided into 6 categories. it is used to indicate the target metals.
• Digital ID Cursor/Pinpoint Cursor: two digits of 01 to 99 accurately indicate the metal material. it also acts as a P-P cursor, when P-P showing, it enters the pinpoint mode.
• Coin Depth Cursor: divided into five grades. indicates the approximate depth of 25￠ silver coin in neutral soil.
• Signal strength cursor: indicates the signal strength when in the pinpoint mode.
• Volume cursor: indicates the volume.
• Sensitivity indication cursor: divided into five grades, sensitivity is highest when all cursor light.
• Battery power cursor: divided into four grades, indicating battery power. When the battery pattern is flashing, which means the battery should be replaced.

Button

• VOL-POWER button:

1. VOL button: Short press to regulate the volume circularly. Long press for about 2 seconds, and the backlight is lit for about 10 minutes.
2. Power button: As on/off power supply.

• MODE-SENS button:

1. Press the MODE button, cycle selection in four ways.
  *  **A- M:** All metal mode, the detector will respond to all metal.
  *  **DISC:** Discrimination mode, in this mode you can eliminate certain kind of metal then the detector won’t respond to it.
  *  **MEMORY:** Remember some kind of metals you choose, and will only respond to this metal.
  *  **JEWELRY:** Eliminate iron, it won’t respond to iron, but it will respond to other metals.
2. Press the SENS button, ( ) buttons to adjust the sensitivity.

• ( ) button: There are two functions.

1. Press SENS button, the sensitivity cursor will flash, and the ( ) button is used to adjust sensitivity.
2. In DISC mode, the ( ) button is used to set the discrimination targets.

• P button: Press the “P-P” button, and the detector will convert to PINPOINT mode, to locate the target accurately. Press the “P-P” button once again, to exit the PINPOINT mode.

QUICK- START

1. Lay the detector
   Put the detector on a wooden or plastic table, and let the search coil stretch out of the table about 30cm, keep away from walls, ceilings and floors, turn off all kinds of electrical appliances that will cause electromagnetic interference, remove watches and rings from hands. (see Fig 9)

2. Turn on
   Press the POWER button, the detector will sound two moo tones, and all LCD patterns will be lit for a moment. And the detector is set by default last shutdown.

3. ALL METAL mode test
   Press the MODE button, the A-M cursor will light. Sweep six sample metals (iron nail, 5￠ nickel coin, pull-tab, 1￠Zinc coin, 10￠ copper coin and 25￠ silver coin)above the search coil 7-10cm respectively.

   • The detector sounds three different tones in turn.
   • The depth cursor indicates the second grade.
   • The target cursor flashes respectively. The digital cursor shows the corresponding number.
     As shown in the table:

4. DISC mode test

   • Press the MODE button again, the DISC cursor is lighted.
   • Press the ( )button, set the discrimination target, to eliminate some metals which do not need to be detected. For example, to reject three kinds of metals such as iron, nickel and pull-tab. Press the ( ) button, making the three target cursors on the left removed.
   • Sweep the six metal samples about 7 to 10cm above the search coil in turn.
   • When sweeping the iron nail, 5￠ nickel coin and pull-tab, the detector will not respond, they are eliminated.
   • When sweeping the other three samples, the corresponding target cursor flashes, and the digital cursor shows the corresponding number. (See Fig. 11, take 50 ￠ silver
   • coin as an example)

5. MEMORY mode test

   • Press the MODE button again, the MEMORY cursor is lighted. And the target discrimination cursor is all lighted.(see Fig.12)

   • If you want to search 50￠ silver coin and eliminate the other metals, you can follow the procedure below:
     Let the 25￠silver coin scan above the search coil about 7-10cm, the target discrimination cursor that the 25￠silver coin cursor consistently lighting, while the other discrimination cursors are removed.(See Fig.13)

   • Sweep the six samples about 7-10cm above the search coil.

   • When sweeping the 50￠ silver coin, the detector responds, indicating that the detector has memorized the 50￠silver coin. When sweeping the other

   • If you want to search other material metals, press the “MODE” button again. The MEMORY cursor still lights up, and still shows the same as Fig.12.Then repeat the above operation.

   • To quit the MEMORY mode, press the MODE button, making the detector return to the state of Fig.12. Then press the MODE button again, to quit the MEMORY mode, and enter the next operation mode.

6. JEWELRY mode test
   Press the MODE button again, the JEWELRY cursor is lighted. The first target cursor on the left removed, showing that the iron is eliminate. It only responds to other metals.(See Fig.15,take 1￠ zinc coin as an example)

7. PINPOINT mode test

8. Press the “P-P” button lightly, and the PP cursor lights and

9. flashes.The detector completes the balance, and the PP cursor

10. stops flashing.
    The identify cursor and digital cursor are extinguished, the depth cursor is full, and the detector sounds a slight single frequency tone.(See Fig.16)

11. Take a 25￠ silver coin and let it approach the search coil slowly.

12. At the position of about 7” to 8”, the first set of signal strength

13. cursor begins to appear, the sound becomes louder and the

14. the tone becomes higher. Continue to move the 25 ￠ silver coin,

15. the signal strength cursor is fast full, the sound is louder, and

16. then the depth cursor indicates the depth down until only one is

17. left, indicating that the metal is gradually approaching the center

18. of the search coil.(See Fig.17)

19. Press the “P-P” button lightly again, the PP cursor will be removed, and exit the PP mode. Done this step, you has a basic knowledge to the detector, and you can move to next step of basic operation.

BASIC OPERATION

MD-810 is used for outdoors. There are too many objects indoors, and all kinds of electrical equipment that will bring interference signals. So it is not fit for using the detector indoors. Field detection is more complicated, the composition of the regional soil, the component, size, shape and the oxidation degree of the underground metals will all affect the detection results. This chapter is only the general steps of field detection. You should operate again and again, and accumulate experience to achieve good results.

1. Turn On
   Hold the detector, keep the search coil be away from the ground. Press the Power button, the detector will sound two moo tones, and all the LCD patterns are lighted for a while. And the detector is restored to the setting of last time.

2. Set the operation mode
   In general, the user could choose the ALL METAL mode. At this time, the detector will respond to all kinds of metals.

3. Choose the sensitivity
   The user always expects to set the sensitivity higher. However, in the higher sensitivity range, the detector will be more sensitive to the electromagnetic interference that comes from the power lines or cables around, and it will react abnormally to the mineralization soil or electrical conductivity soil. If you move the search coil in the detection area, and the detector sends an unstable false signal, please decrease the sensitivity. If you operate the detector with your partner at the same time, please pay attention to keep more than 10 meters away from each other, and decrease the sensitivity appropriately.

4. Move the search coil
   When detecting, move the search coil at a constant speed, not unsteadily. Let the search coil be parallel with and about 1/2 inch from the surface, not to swing it like a pendulum high and low above the ground. (See Fig 18) Fig.18Most of the valuable metal objects will send repeatable signals. If the signal isn’t repeatable, it’s mostly a false signal. When there is a clear sound instructing the buried targets. You could read out the approximate target type and depth on the LCD screen. And you could also move the search coil above the target objects fast, in order to get a more stable signal.

5. Make use of the sound, to help against discrimination
   In the process of detection, you needn’t always watch the screen. And the sound identification system will sound three frequency tones to help discriminate the targets.
   Low pitch– 5￠nickel coin and so on.
   Meddle pitch– pull-tab, soda bottle and zinc coin.
   High pitch– copper, aluminum and silver metal, such as 1￠, 10￠, 25￠and so on.

6. Make use of the digital cursor, to help discrimination
   The following table is used as a preliminary guide. The approximate ranges of US dollar and pound sterling coins are listed in the table. When detecting, there may be some changes in the number, depending on the composition, size, shape, distance from the search coil and speed of scanning. The surrounding soil also affects the numerical value. There are differences in casting coins in different years. The values in the table are the only reference, Gold has a wide numerical range, a thin ring is about 45, and a rough ring and gold coin may up to 70-80.

7. Depth indication
   The depth indication is accurate for coin-sized objects. Large objects or irregularly-shaped objects will yield less reliable depth readings. If sweeping at the same place for several times, but shows the same depth, and it is the more accurate detection. If the depth indication varies, try to change the angle of sweep. There may be more than one target present.

8. PINPOINT
   When detecting in the motion mode, as you should persistently move the search coil, so although you find the region that burying metals, it’s not easy for you to determine the exact location, it gets the digging difficult. At this time, you should recur to the PINPOINT mode.

9. Press the PINPOINT button, the PINPOINT cursor is lighted, the depth cursor will be full scale, and the detector will sound a low single-frequency tone, the sensitivity is in the highest state.

10. Let the search coil approach the ground, move the search coil slowly in the region, where you find the target. In the position where the single frequency tone turns louder, and the signal strength cursor begins to appear, Continue moving the search coil slowly until the sound turns louder, the signal strength cursor is full scale, and the depth cursor is the lowest. Now, you have locked the target location roughly.

11. If the area with the strongest signal is larger and the location is not accurate enough, you can keep the location of the search coil unchangeable and exit the PP mode. Then press the PP button again and repeat the above operation. Until you move the search coil slightly, the strongest signal will be smaller. Now, the position of the metal target has been locked. You can mark on the ground by the center of the open search coil, to facilitate the digging.

12. You can choose another operation mode according to your needs and experience.
    If there are more scrap metals in the detection area, you can choose the DISC mode to eliminate the metals that do not need to be detected. Remind you once again, when detecting in the wild, due to the impact of the ground condition, the discrimination indication and depth indication will be all deviations. The composition, size, and oxidation of the metals will all affect the indication result. It’s necessary for you to consider these factors before choosing to eliminate a certain metal or determining whether there are precious metals. Not to eliminate the precious metals.

In fact, the sensitivity in the non-motion mode is high, searching metals directly using the non-motion mode is also a choice. In some regions. the ground is too narrow to sweep the search coil, you could choose the PINPOINT mode. In the severe mineralization or salinization region, you could try to sweep using PINPOINT directly.

CAUTION

1. In areas with heavy traffic, please do not wear earphones, in case an accident occurs.
2. Always obtain permission before searching any site.
3. Keep away from the region that may bury the electrical line, cable line or pipeline, in particular, the pipes that are full of flammable gases and liquids.
4. Do not detect in the military area where may bury bombs or gas explosives.
5. When excavating the target, use the reasonable method, not destroy the vegetation. Leave the land and vegetation as it was, fill in the holes after the excavation.

TROUBLESHOOTING GUIDE

Use with headphones
The MD-810 is equipped with a 3.5mm headphone jack. Using headphones extends battery life, and also prevents the sounds from bothering bystanders. It also allows you to hear subtle changes in the sound more clearly, particularly if searching in a noisy location. Gold nuggets are often very small, so closely monitoring changes in sound using headphones will improve your gold prospecting results.

CARE AND MAINTENANCE

Your MD-810 metal detector is an example of superior design and Craftsmanship. The following suggestions will help you care for your metal detector so you can enjoy it for years.

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