Introducció
The CEM DT-3398B is a professional True RMS Clamp Meter designed to provide accurate AC and AC/DC current and voltage readings, regardless of waveform distortion. This meter is suitable for a wide range of industrial, commercial, and HVAC applications where precise measurements are critical, especially in environments with non-linear loads. It incorporates advanced features such as a large backlit display, easy clamp control, Bluetooth connectivity for data tracking, Non-Contact Voltage (NCV) detection, a built-in flashlight, and temperature measurement capabilities.

Figure 1: CEM DT-3398B True RMS Clamp Mesurador

Figure 2: DT-3398B with Mobile App Connectivity
Informació de seguretat
Always adhere to local and national safety codes. Use appropriate personal protective equipment (PPE) such as insulated gloves and eye protection. Ensure the meter is in good working condition before use. Do not attempt to measure voltages or currents exceeding the specified maximum ranges. This device is designed to meet CAT IV 1000V requirements as defined by IEC 61010 (3rd edition) standards.
Video 1: Product demonstration highlighting features and safety compliance.
Contingut del paquet
Verifiqueu que tots els elements siguin presents i no estiguin danyats en desempaquetar-los:
- CEM DT-3398B Clamp Mesurador
- 1.5V AA Batteries (x3)
- Sonda de temperatura
- Fils de prova
- Gift Box with Carrying Case
- Manual d'instruccions
Configuració
1. Instal·lació de la bateria
- Localitzeu el compartiment de la bateria a la part posterior del mesurador.
- Obriu la coberta del compartiment.
- Insert three 1.5V AA batteries, ensuring correct polarity.
- Tanqueu bé la tapa del compartiment de la bateria.
2. Connexió a l'aplicació mòbil (Bluetooth)
The DT-3398B supports Bluetooth data transmission for tracking and analysis via a mobile application.
- Download the official CEM mobile application from your device's app store.
- Assegureu-vos que el Bluetooth estigui habilitat al vostre dispositiu mòbil.
- Turn on the DT-3398B meter.
- Open the mobile application and initiate a device scan.
- Select 'DT-3398B AM' or a similar identifier from the list of available devices to connect.
- Un cop connectat, pots view real-time measurements and track data within the app.

Figura 3: Clamp meter measuring current in an electrical panel.
Instruccions de funcionament
The DT-3398B features easy-to-use dials and buttons for various measurement functions.

Figura 4: Frontal view del clamp meter showing display and controls.
1. Mides bàsiques
- Mesura de corrent AC/DC: Rotate the dial to the 'A' (Amperes) setting. Pull the trigger to open the clamp jaw and enclose the conductor. The current reading will appear on the display.
- Volum AC / DCtage Mesura: Rotate the dial to the 'V' (Volts) setting. Connect the test leads to the appropriate terminals and then to the circuit under test.
- Mesura de la resistència: Rotate the dial to the 'Ω' (Ohms) setting. Connect the test leads to the component to measure resistance.
- Mesura de la capacitat: Rotate the dial to the 'CAP' setting. Connect the test leads to the capacitor.
- Mesura de la temperatura: Rotate the dial to the '°C/°F' setting. Connect the temperature probe to the meter and place the probe on the surface or in the environment to measure temperature. This feature is ideal for HVAC professionals.
- Comprovació de continuïtat: Rotate the dial to the continuity symbol. If the resistance is below approximately 50Ω, the buzzer will sound.
- Prova de díode: Rotate the dial to the diode symbol. Connect the test leads across the diode to check its forward voltage gota.
2. Funcions avançades
- RMS veritable: Proporciona lectures precises tant per a formes d'ona sinusoidals com no sinusoidals.
- Retenció de dades (HOLD): Premeu el botó «HOLD» per congelar la lectura actual a la pantalla. Torneu a prémer-lo per alliberar-lo.
- Peak Hold (PEAK): Captures the peak value of a transient signal.
- MÀXIM / MÍN: Records the maximum and minimum values measured over a period. Press the 'MAX/MIN' button to cycle through MAX, MIN, and current readings.
- Inrush Current Measurement: Useful for measuring the starting current of motors or other inductive loads.
- DCA Zero Function: Used to zero out any offset when performing DC current measurements.
- Vol. Sense contactetagDetecció de e (NCV): Hold the NCV sensor near a live conductor to detect AC voltage without physical contact. The meter will indicate voltage presence with an audible alarm and/or visual indicator.
- Llanterna: Press the flashlight button to illuminate dark work areas.
- Il·luminació de fons: The large and bright backlit display ensures readability in various lighting conditions.
- Apagat automàtic: El mesurador s'apaga automàticament després d'un període d'inactivitat per estalviar bateria.

Figure 5: The DT-3398B is versatile for various applications including industrial, business, family, school, and laboratory settings.

Figura 6: Mesura del volumtage amb cables de prova.
Manteniment
1. Neteja
Netegeu el comptador amb anuncisamp cloth and mild detergent. Do not use abrasives or solvents. Ensure the meter is completely dry before storage or next use.
2. Substitució de la bateria
When the low battery indicator appears on the display, replace the batteries as described in the 'Setup' section to ensure accurate readings and proper operation.
3. Emmagatzematge
When not in use, store the meter in its carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.
Resolució de problemes
- El mesurador no s'encén: Comproveu la instal·lació de les piles i assegureu-vos que no estiguin esgotades. Substituïu-les si cal.
- Lectures inexactes: Verify the correct measurement function is selected. Ensure test leads are properly connected and not damaged. Check for external interference.
- La pantalla mostra 'OL': This indicates an overload, meaning the measured value exceeds the meter's range for the selected function. Switch to a higher range if available or ensure the measurement is within the meter's capabilities.
- Problemes de connexió Bluetooth: Ensure Bluetooth is enabled on both the meter and mobile device. Restart both devices and try reconnecting.
Especificacions

Figure 7: Detailed specifications table.
| Característica | Especificació |
|---|---|
| Nom del producte | Mini Digital Clamp Mesurador |
| Tipus | Digital Professional Clamp Mesurador |
| Nom de marca | CEM |
| Número de model | DT-3398B |
| Origen | Xina continental (Guangdong) |
| Tipus de visualització | Només digital |
| Digital Display Counts | 6000 |
| Rang de mesura de corrent (CA/CC) | 2000A |
| Volum de mesuratage Rang | 1000 V |
| Interval de resistència | 60 MΩ |
| Rang de mesura de capacitança | 10 mF |
| Interval de temperatura | 1000 °C / 1832 °F |
| Electronic Frequency | 100 kHz |
| Temperatura de funcionament | 0-40°C |
| Dimensions | 308 mm x 97 mm x 47 mm |
| Pes | 732 g |
| Clamp Obertura de la mandíbula | 2" (52 mm) |
| True RMS Measurements | Sí |
| Analog Bargraph/Segments | Sí |
| Continuity Buzzer & Diode Check | Sí |
| Data Hold & Peak Hold Function | Sí |
| Flashlight & Backlight Function | Sí |
| MAX/MIN | Sí |
| Mesura de corrent d'entrada | Sí |
| DCA Zero Function | Sí |
| Detecció de NCV | Sí |
| Apagat automàtic | Sí |
| Indicació de bateria baixa | Sí |
| Transmissió de dades Bluetooth | Sí |
| Font d'alimentació | 1.5V AA x 3 Batteries |
| Certificat | CE CAT.IV 1000V |
Consells per a l'usuari
- For optimal accuracy, especially with DC current measurements, utilize the DCA Zero function before taking readings.
- Quan es mesura el corrent amb el clamp, ensure only one conductor is enclosed within the jaw for a correct reading.
- Avançanttage of the Bluetooth connectivity to log measurements over time, which can be invaluable for diagnosing intermittent issues or monitoring system performance.
- The built-in flashlight is particularly useful when working in dimly lit electrical panels or confined spaces.
Garantia i Suport
Per obtenir informació sobre la garantia, assistència tècnica o consultes de servei, poseu-vos en contacte amb el fabricant o el vostre distribuïdor autoritzat. Conserveu el rebut de compra com a comprovant de compra.





