1. Introduktion
The GOYOJO Digital Gauss Meter is a portable, multifunctional magnetic field measuring instrument. It utilizes high-sensitivity, low-drift Hall sensors and advanced digital signal processing technology to provide accurate measurements. This device is designed for measuring the surface magnetic field of permanent magnet materials, residual magnetism of mechanical parts, and magnetic fields in separators and iron removers. It serves as an essential tool for magnetic material manufacturers, mechanical engineering, and research institutions.

Image 1.1: The GOYOJO Digital Gauss Meter with its connected Hall probe, demonstrating magnetic field measurement.
2. Sikkerhedsoplysninger
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in injury or damage to the instrument.
- Do not attempt to disassemble or modify the instrument. Unauthorized modifications can lead to malfunction and void the warranty.
- Keep the device away from water and other liquids to prevent electrical shock or damage.
- Avoid exposing the instrument to extreme temperatures, direct sunlight, or high humidity.
- Handle the Hall probe with care. It is a sensitive component and can be damaged by excessive force or bending.
- Ensure the battery compartment is securely closed during operation.
- Bortskaf batterier i henhold til lokale regler.
3. Pakkens indhold
Bekræft, at alle nedenstående varer er inkluderet i din pakke:
- GOYOJO Digital Gauss Meter x1
- Hall Sensor Probe x1
- 9V batteri x1
- Brugervejledning x1
4. Produktet er slutview
The GOYOJO Digital Gauss Meter features a clear display, intuitive controls, and a high-precision Hall sensor for reliable magnetic field measurements.

Billede 4.1: Overview of the GOYOJO Digital Gauss Meter, showcasindens display og kontrolknapper.
4.1 Enhedskomponenter
- Hovedenhed: The primary device housing the display, control buttons, and internal electronics.
- LCD-skærm: Backlit screen showing measurement values, units, N/S pole indication, and battery status.
- Kontrolknapper:
- TIL/FRA: Tænder eller slukker for enheden.
- SPIDS: Toggles between Peak Hold mode and Real-time mode.
- NUL: Performs a one-key zeroing operation.
- ENHED: Switches between mT (millitesla) and Gs (Gauss) units.
- LYS: Aktiverer eller deaktiverer displayets baggrundsbelysning.
- Hall Probe: External sensor connected to the main unit for detecting magnetic fields.
- Probeforbindelse: Secure port on the main unit for attaching the Hall probe.
5. Opsætning
5.1 Batteriinstallation
The device is powered by a 9V battery.
- Find batterirummet på bagsiden af hovedenheden.
- Åbn batterirummets dæksel.
- Tilslut 9V-batteriet til batteriklemmen, og sørg for korrekt polaritet.
- Placer batteriet i batterirummet, og luk dækslet forsvarligt.
5.2 Connecting the Hall Probe
The Hall probe is essential for magnetic field detection.
- Identify the probe connector port on the top of the main unit.
- Align the Hall probe connector with the port.
- Gently push and twist the connector clockwise until it is securely fastened.
- Ensure the connection is firm to prevent intermittent readings.

Image 5.1: Proper connection of the Hall probe to the main unit and the importance of perpendicular orientation for accurate measurement.
6. Betjeningsvejledning
6.1 Tænd/sluk
- For at tænde enheden skal du trykke på ON/OFF knap.
- For at slukke for enheden skal du trykke på og holde nede ON/OFF knappen i et par sekunder.
- The device features an automatic shutdown function after 5 minutes of inactivity to conserve battery life.
6.2 Måletilstande
The Gauss Meter supports two primary measurement modes: Peak Hold and Real-time.

Image 6.1: Illustration of the Peak Hold and Real-time measurement modes on the device display.
- Peak Hold Mode: Tryk på SPIDS button once to enter Peak Hold mode. In this mode, the display will show the maximum magnetic field value detected since entering the mode. This is useful for capturing transient or fluctuating magnetic fields.
- Real-time Mode: Tryk på SPIDS button again to return to Real-time mode. The display will show the current magnetic field strength as it is being measured.
6.3 Nulstilling
Before taking measurements, it is recommended to perform a zeroing operation to ensure accuracy.
- Ensure the Hall probe is away from any magnetic fields.
- Tryk på NUL button. The display should show '000.00' or a value very close to zero.
6.4 Enhedsskift
The device supports two units for magnetic field measurement: millitesla (mT) and Gauss (Gs).
- Tryk på ENHED button to toggle between mT and Gs.
- Note that 1 mT = 10 Gs.
6.5 Baggrundsbelysningsfunktion
The display features a backlight for improved visibility in low-light conditions.

Image 6.2: The backlit display of the GOYOJO Digital Gauss Meter, enhancing readability in various lighting conditions.
- Tryk på LYS knappen for at tænde eller slukke for baggrundslyset.
6.6 N/S Pole Detection
The device can detect and display the North (N) or South (S) pole of a magnetic field.

Image 6.3: Visual representation of how the Hall sensor detects and indicates North (N) and South (S) poles on the display.
- When the magnetic field passes the front of the Hall sensor, the screen displays "N".
- When it passes the back of the Hall sensor, the screen displays "S".
7. Vedligeholdelse
- Rensning: Brug en blød, tør klud til at rengøre enheden. Brug ikke slibende rengøringsmidler eller opløsningsmidler.
- Opbevaring: When not in use for extended periods, remove the 9V battery to prevent leakage. Store the device and probe in a cool, dry place, away from strong magnetic fields and direct sunlight.
- Probepleje: The Hall probe is delicate. Avoid bending or applying excessive pressure to the probe tip. Always store it safely to prevent damage.
8. Fejlfinding
- Enheden tændes ikke: Kontroller, om 9V-batteriet er korrekt installeret og har tilstrækkelig opladning. Udskift batteriet om nødvendigt.
- Unøjagtige eller svingende aflæsninger:
- Ensure the Hall probe is positioned perpendicular to the magnetic field being measured.
- Perform a zeroing operation in an area free of magnetic fields.
- Check for any external magnetic interference in the measurement environment.
- Skærmen er svag eller ulæselig: Tryk på LYS button to activate the backlight. If the issue persists, the battery may be low.
- Probe not detected: Ensure the Hall probe is securely connected to the main unit's connector port.
9. Specifikationer
The following table details the technical specifications of the GOYOJO Digital Gauss Meter (GT129 Series):

Image 9.1: Detailed specifications for the GT129A, GT129B, and GT129C models of the GOYOJO Digital Gauss Meter.
| Feature | GT129 A | GT129 B | GT129 C |
|---|---|---|---|
| Nøjagtighed | ±1.0 % | ±2.0 % | ±2.0% (0-1000mT) ±5.0% (1000mT-2000mT) |
| Måleområde | 0-2000mT (20000Gs) | ||
| Opløsning | 200mT resolution: 0.01mT (0.1G) | 2000mT resolution: 0.1mT (1G) | |
| Rækkevidde | 200mT (2000Gs) / 2000mT (20000Gs) | ||
| Auto Range Switch | For measurements below 200mT, the range will display 200mT. For measurements above 200mT, the range will automatically switch to 2000mT. | ||
| Probe sensor | High-precision Hall sensor, approximately 1 meter in length | ||
| Enhedsskift | Two units can be switched: mT and Gs, 1mT = 10Gs | ||
| Baggrundsbelysningstilstand | With backlight | ||
| Peak Hold-funktion | PEAK mode can hold the maximum measurement value | ||
| Automatisk OFF | 5 min | ||
| Strømforsyning | 9V batteri x1 | ||
| Brugsmiljø | 0°C ~ 50°C, 20% ~ 85% RH, Non-condensing | ||
| Opbevaringsmiljø | -20°C ~ 70°C, <85% RH, Non-condensing | ||
| Størrelse | 160 mm × 75 mm × 34 mm | ||
| Vægt | Omkring 260 g | ||
10. Garanti og support
GOYOJO provides dedicated customer support for this Digital Gauss Meter.
- Garanti: A 2-month replacement guarantee is provided from the date of purchase.
- Teknisk support: Lifetime technical support is available to ensure a reliable and worry-free experience with your device.
- For any inquiries or assistance, please contact GOYOJO customer service. Refer to the product packaging or official webwebsted for kontaktoplysninger.





