1. Introduktion og overview
The CEM DT-3398B Series Professional True RMS Clamp Meter is designed to provide accurate AC and AC/DC current and voltage readings, irrespective of waveform distortions. This instrument is suitable for a wide range of industrial and commercial applications, particularly where non-linear loads may affect current or voltage bølgeformer.
Nøglefunktioner omfatter:
- AC/DC 2000A Current measurement with a 2-inch (52mm) jaw opening.
- 6000 counts LCD display for clear readings.
- True RMS measurements for accurate readings on non-sinusoidal waveforms.
- Måling Voltage Range: 1000V AC/DC.
- Measuring Resistance Range: 60MΩ.
- Measuring Capacitance Range: 10mF.
- NVC (Non-Contact Voltage) Detection.
- Built-in Flashlight for illuminated work areas.
- Bluetooth connectivity for data transmission.
- Electronic overload protection: CAT IV 1000V.
Figur 1: Forside view of the CEM DT-3398B Clamp Meter, showing the display, rotary dial, and function buttons.
2. Sikkerhedsoplysninger
Read and understand all safety information before operating this meter. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- CAT IV 1000V Rating: This meter is rated for CAT IV 1000V, indicating its suitability for measurements at the source of the low-voltage-installation, såsom elmålere og primære overstrømsbeskyttelsesanordninger.
- Fare for elektrisk stød: Always assume that any circuit is live until proven otherwise. Do not touch exposed conductors or circuit components.
- Korrekt brug: Use the meter only as specified in this manual. Do not exceed the maximum input limits for any function.
- Inspektion: Før hver brug skal måleren, testledningerne og tilbehøret kontrolleres for eventuelle skader. Må ikke anvendes, hvis de er beskadigede.
- Udskiftning af batteri: Ensure the meter is disconnected from all circuits and powered off before opening the battery compartment.
- Miljøforhold: Do not operate the meter in explosive atmospheres or in wet conditions.
- Personligt beskyttelsesudstyr (PPE): Always wear appropriate PPE, such as safety glasses and insulated gloves, when working with electrical circuits.
3. Produktfunktioner
The DT-3398B clamp meter offers a comprehensive set of features for professional electrical measurements:
- Ægte RMS-måling: Giver nøjagtige aflæsninger for både sinusformede og ikke-sinusformede AC-bølgeformer.
- Stor kæbeåbning: 2-inch (52mm) jaw opening accommodates large conductors.
- Høj strømkapacitet: Måler op til 2000A AC/DC strøm.
- Voltage Måling: Måler op til 1000V AC/DC volumtage.
- Resistance and Capacitance: Includes functions for measuring resistance up to 60MΩ and capacitance up to 10mF.
- Continuity Buzzer & Diode Check: For quick circuit testing.
- Data Hold & Peak Hold: Allows freezing of displayed readings and capturing peak values.
- Lommelygte og baggrundsbelysning: Forbedrer synligheden i svagt oplyste omgivelser.
- MAX/MIN-funktion: Records maximum and minimum readings over a measurement period.
- Måling af indkoblingsstrøm: Captures transient current surges during motor startup.
- DCA Zero Function: For accurate DC current measurements.
- NCV Detection: Non-Contact Voltage detection for identifying live wires without physical contact.
- Automatisk sluk: Sparer batterilevetid.
- Bluetooth Data Transmission: Enables remote monitoring and data logging via a mobile application.
Figure 2: The DT-3398B Clamp Meter, illustrating its capability for AC/DC TRMS measurement and mobile app integration via Bluetooth.
4. Opsætning
4.1 Batteriinstallation
The DT-3398B requires one 9V battery for operation. To install or replace the battery:
- Ensure the meter is powered off and disconnected from all circuits.
- Find batteridækslet på bagsiden af måleren.
- Brug en skruetrækker til at løsne skruen/skruerne, der fastgør dækslet.
- Fjern dækslet, og isæt et nyt 9V-batteri, og sørg for at polariteten vender korrekt.
- Sæt dækslet på igen, og spænd skruen/skruerne.
4.2 Tilslutning af testledninger
For bdtage, resistance, capacitance, and diode measurements, connect the test leads to the input jacks:
- Indsæt den sorte testledning i KOM (Fælles) stik.
- Indsæt den røde testledning i VΩCAPHZTemp stik.
Figure 3: User holding the DT-3398B Clamp Meter, demonstrating proper grip and test lead connection points.
5. Betjeningsvejledning
This section details the operation of various functions of the DT-3398B clamp måler.
5.1 Tænd/sluk og funktionsvalg
- To power on the meter, rotate the central rotary dial from the SLUKKET position to the desired measurement function.
- To power off, rotate the dial back to the SLUKKET position.
- The meter features an Automatisk sluk function to conserve battery life. It will automatically shut down after a period of inactivity.
5.2 AC/DC strømmåling (Clamp Kæbe)
- Drej drejeknappen til A~ (AC-strøm) eller A= (DC-strøm) position.
- Tryk på kæbeaftrækkeren for at åbne clamp kæbe.
- Omslut en enkelt leder med clamp kæbe. Sørg for, at kæben er helt lukket.
- Aflæs den aktuelle værdi på LCD-displayet.
- For jævnstrøm skal du bruge DCA nul function (if available via a button) to zero the display before measurement to eliminate residual magnetism effects.
5.3 AC/DC Voltage Måling
- Drej drejeknappen til V~ (AC-volumentage) eller V= (DC bindtage) stilling.
- Tilslut den sorte testledning til KOM stik og den røde testledning til VΩCAPHZTemp stik.
- Berør testproberne ved de kredsløbspunkter, hvor vol.tage skal måles.
- Læs bindtage -værdi på LCD -displayet.
5.4 Resistance, Continuity, Diode, and Capacitance Measurement
- Drej drejeknappen til ΩCAP position.
- Tilslut testledningerne som beskrevet i afsnit 4.2.
- Brug MODE button to cycle through Resistance (Ω), Continuity (buzzer icon), Diode (diode symbol), and Capacitance (CAP) functions.
- For resistance, connect probes across the component.
- For continuity, a beep indicates a continuous circuit.
- For diode test, connect probes across the diode.
- For capacitance, connect probes across the capacitor (ensure it is discharged).
5.5 NCV (kontaktfri volumen)tage) Registrering
- Drej drejeknappen til NCV position.
- Move the top of the meter near a conductor or outlet.
- The meter will emit an audible beep and/or visual indication (e.g., flashing LED) if AC voltage er opdaget.
5.6 Special Functions (HOLD, MAX/MIN, Inrush, Flashlight, Bluetooth)
- HOLDE: Tryk på HOLDE knappen for at fryse den aktuelle aflæsning på displayet. Tryk igen for at slippe.
- MAX / MIN: In a measurement function, press the MAX/MIN button to enter MAX/MIN recording mode. The meter will display the maximum or minimum value recorded. Press again to cycle.
- Inrush: This function is typically activated by a dedicated button or a specific dial position. It measures the initial surge current when a device (like a motor) starts up.
- Lommelygte: Press the flashlight button (if dedicated) or hold a specific function button to activate the built-in flashlight.
- Bluetooth: Activate Bluetooth on the meter (if a dedicated button exists) and pair with a compatible mobile device running the specified application for data logging and remote viewing. Refer to the mobile application's instructions for detailed usage.
Figure 4: The DT-3398B Clamp Meter in use, demonstrating its ability to measure current and highlighting advanced features such as Peak Hold and Inrush Current measurement.
6. Vedligeholdelse
6.1 Rengøring
Tør målerens hus af med enamp en klud og et mildt rengøringsmiddel. Brug ikke slibemidler eller opløsningsmidler. Sørg for, at måleren er helt tør før brug.
6.2 Udskiftning af batteri
Refer to Section 4.1 for instructions on battery replacement. Replace the battery when the low battery indicator appears on the display to ensure accurate measurements.
6.3 Kalibrering
Periodic calibration by qualified personnel is recommended to ensure the meter maintains its accuracy over time. Contact CEM customer support for calibration services.
7. Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Måleren tænder ikke. | Dødt eller forkert installeret batteri. | Udskift 9V-batteriet, og sørg for korrekt polaritet. |
| Upræcise aflæsninger. | Low battery, incorrect function selected, damaged test leads, external interference. | Replace battery, verify function, check test leads for damage, move away from strong electromagnetic fields. |
| "OL" eller "OVER" vises. | Målingen overstiger målerens rækkevidde. | Select a higher range if available, or ensure the measured value is within the meter's specifications. |
| Ingen NCV-detektion. | Ingen AC voltage present, or meter not close enough to the source. | Bekræft tilstedeværelsen af AC-volumentage with another method, ensure the meter's NCV sensor is close to the conductor. |
| Problemer med Bluetooth-forbindelse. | Bluetooth not enabled on meter or mobile device, app issues, out of range. | Ensure Bluetooth is active on both devices, restart app, move closer to the meter. |
8. Specifikationer
The following table outlines the key technical specifications for the CEM DT-3398B Clamp Måler:
| Fungere | Max rækkevidde | Grundlæggende nøjagtighed | Maks. Opløsning |
|---|---|---|---|
| AC strøm | 2000 A | ± (2.5% + 5d) | 1A |
| DC-strøm | 2000 A | ± (2.5% + 5d) | 1A |
| AC Voltage | 1000V | ± (0.8% + 2d) | 0.1mV |
| DC bindtage | 1000V | ± (1.0% + 4d) | 0.1mV |
| Modstand | 60MΩ | ± (1.0% + 5d) | 0.1Ω |
| Kapacitans | 10 mF | ± (3.0% + 5d) | 0.01nF |
| Electronic Frequency | 100KHz | ± (1.2% + 3d) | 0.01kHz |
| Temperatur | 1000°C/1832°F | ± (3.0% + 5d) | 1°C/°F |
| Total harmonisk forvrængning | 99.9 % | 0.1 % | ± (3% + 10d) |
| Harmonisk forvrængning måling | 99.9 % | 0.1 % | ± (5% + 10d) |
| Aktiv kraft | 999.9KW | A error x Vreading + Verror x Areading | * |
| Effektfaktor | -1.0 ~ 0.0 ~ 1.0 | ± (3% + 1d) | * |
| Kontinuitetstjek | Buzzer sounds at 50Ω | * | |
| Diode test | Test current <0.5mA Max 3V | * |
Generelle specifikationer:
- Vise: 6000 tæller LCD
- Kæbeåbning: 2 tommer (52 mm)
- Strømforsyning: 9V batteri
- Dimensioner (LxBxH): 308 mm x 97 mm x 47 mm
- Vægt: 732 g
- Sikkerhedsvurdering: KAT IV 1000V
- Certifikater: CE, ISO 9001, RoHS
- Tilbehør: Test leads, temperature probe (for 3398B/3398W), gift box with carrying case. (Note: 9V battery is required and typically included, contradicting some accessory lists.)
Figure 5: Detailed technical specifications for the DT-3398B Clamp Meter, including measurement ranges, accuracy, and resolution.
9. Garanti og support
The manufacturer provides a 2-year availability for spare parts. For warranty claims, technical support, or service inquiries, please contact your local distributor or the manufacturer directly. Keep your purchase receipt as proof of purchase.