1. Introduktion
This manual provides essential instructions for the safe and effective operation of your VOLTCRAFT RM-400 Geiger Counter. The RM-400 is designed for detecting Alpha, Beta, Gamma, and X-ray radiation, featuring high measurement accuracy, an internal memory for 4000 readings, a large LCD display, and Bluetooth connectivity for data evaluation. Please read this manual thoroughly before using the device.
2. Sikkerhedsoplysninger
ADVARSEL: To reduce the risk of injury, always read and understand the operator's manual before using this device.
- Ensure batteries are correctly installed before operation.
- Do not attempt to open or modify the device, as this may compromise its accuracy and safety features.
- Keep the device away from extreme temperatures, moisture, and strong magnetic fields.
- This device is for informational and detection purposes. It is not a substitute for professional radiation safety equipment or expert advice.
- Bortskaf batterier og enheden i henhold til lokale regler.
3. Produktet er slutview
The VOLTCRAFT RM-400 is a handheld Geiger counter designed for comprehensive radiation detection.

Figur 3.1: Vinklet view of the VOLTCRAFT RM-400 Geiger Counter, highlighting the display and control buttons.
3.1 Enhedskomponenter
- Geiger-Müller Tube: Located at the top, responsible for detecting radiation.
- LCD-skærm: Large screen for displaying measurement data, time, and settings.
- Kontrolknapper: For navigation, settings, saving data, and power.
- Batterirum: Located at the rear for 4x 1.5V AA batteries.
- Bluetooth-modul: For wireless data transfer to evaluation software.

Figur 3.2: Forside view of the RM-400, showing the layout of the control buttons: SETUP, SAVE, SV/h R/h, Power, GPS/CAL/ML, ESC, and navigation arrows.

Figur 3.3: Bagside view of the RM-400, indicating the battery compartment and safety warnings, including the requirement for 4x 1.5V AA batteries.
4. Opsætning
4.1 Batteriinstallation
- Find batteridækslet på bagsiden af enheden.
- Skub eller afklips dækslet for at åbne det.
- Insert 4x 1.5V AA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Sæt batterirummets dæksel på igen.
4.2 Indledende tænding
- Tryk og hold på Magt knappen, indtil displayet lyser.
- The device will perform a self-test and then display the current radiation level.
- Adjust date, time, and other settings via the OPSÆTNING menu if prompted or desired.
5. Betjeningsvejledning
5.1 Udførelse af målinger
Once powered on, the RM-400 continuously monitors radiation levels.
- Realtidsvisning: The large LCD shows the current radiation dose rate (e.g., µSv/h).
- Radiation Types: The device detects Alpha, Beta, Gamma, and X-ray radiation. The specific detection mode or sensitivity may be adjustable in the SETUP menu.
- Akustisk advarsel: The device emits an audible click for each detected radiation particle. An adjustable alarm threshold can be set to trigger a continuous warning sound when radiation levels exceed a predefined limit.

Figure 5.1: A user operating the RM-400 Geiger Counter, demonstrating its handheld use for radiation measurement in a controlled environment.
5.2 Datalogning og -lagring
- The RM-400 has an internal memory capable of storing up to 4000 readings.
- Tryk på SPARE button to manually record the current measurement.
- Automatic logging intervals may be configured in the SETUP menu.
5.3 Bluetooth-forbindelse
The device supports Bluetooth for transferring stored data to a computer or compatible mobile device for further analysis using the included evaluation software.
- Ensure Bluetooth is enabled on your RM-400 (check SETUP menu).
- Activate Bluetooth on your receiving device (computer/smartphone).
- Open the VOLTCRAFT evaluation software.
- Follow the software's instructions to pair with the RM-400 and download data.
6. Vedligeholdelse
6.1 Rengøring
- Tør enheden af med en blød, tør klud.
- Brug ikke slibende rengøringsmidler eller opløsningsmidler.
- Sørg for, at der ikke kommer væske ind i enhedens åbninger.
6.2 Opbevaring
- Opbevar enheden på et køligt, tørt sted væk fra direkte sollys.
- Fjern batterierne, hvis enheden ikke skal bruges i længere tid, for at forhindre lækage.
7. Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Enheden tænder ikke. | Lave eller døde batterier; forkert batteriinstallation. | Udskift batterierne; kontroller batteripolariteten. |
| Upræcise aflæsninger. | Interference from other electronic devices; device malfunction. | Move away from potential interference sources; contact support if problem persists. |
| Bluetooth-forbindelse mislykkes. | Bluetooth not enabled on device or receiving unit; out of range. | Ensure Bluetooth is active on both devices; move closer; restart devices. |
| No acoustic warning. | Acoustic warning disabled; volume too low; alarm threshold not met. | Check settings in SETUP menu; adjust volume; verify radiation levels exceed threshold. |
8. Specifikationer
| Modelnavn | VOLTCRAFT RM-400 Geiger Counter |
| Varemodelnummer | VC-12822170 |
| Strålingsdetektion | Alpha, Beta, Gamma, X-rays |
| Intern hukommelse | 4000 aflæsninger |
| Vise | Stor LCD |
| Forbindelse | Bluetooth |
| Strømkilde | 4x 1.5V AA Batteries |
| Produktdimensioner | 14 x 18 x 31 cm |
| Varens vægt | 226 gram |
| Inkluderede komponenter | Butter Paper (Note: This might be a translation error or packaging material. Refer to product packaging for exact contents.) |
| Specifikke anvendelser | Radiation measurement, radiation detection, research, industrial, educational purposes |
9. Garanti og support
For warranty information, technical support, or service inquiries, please refer to the documentation included with your product or visit the official VOLTCRAFT webwebstedet. Behold din købskvittering som købsbevis.





