BENNING 44690

BENNING MM 7-2 True RMS Digital Multimeter User Manual

Model: 44690

1. Úvod

The BENNING MM 7-2 is a True RMS digital multimeter designed for precise measurements in industrial, service, electrical trade, and HVAC technology applications. It features a 4 5/6 digit LCD display with backlight, offering high resolution and accuracy for various electrical parameters. This manual provides essential information for the safe and effective use of your BENNING MM 7-2 multimeter.

2. Bezpečnostní informace

Vždy dodržujte následující bezpečnostní opatření, abyste předešli zranění osob a poškození multimetru nebo testovaného zařízení.

  • Přečtěte si manuál: Thoroughly read and understand all instructions before using the multimeter.
  • Jmenovitý objemtage: Do not exceed the maximum input limits for any function. The multimeter is rated for CAT IV 600V and CAT III 1000V.
  • Před použitím zkontrolujte: Před každým použitím zkontrolujte multimetr, měřicí kabely a příslušenství, zda nejsou poškozené. Pokud jsou poškozené, nepoužívejte jej.
  • Proper Terminals: Ensure test leads are connected to the correct input terminals for the desired measurement function.
  • Živé obvody: Exercise extreme caution when working on live circuits. Always assume circuits are live until proven otherwise.
  • Osobní ochranné prostředky (OOP): Wear appropriate PPE, such as safety glasses and insulated gloves, when necessary.
  • Podmínky prostředí: Do not use the multimeter in wet environments or in the presence of explosive gases or dust.
  • Ochrana pojistek: The current input terminals are fuse-protected. Replace fuses only with specified types and ratings.
  • Výměna baterie: Pro zajištění přesných údajů vyměňte baterie ihned po zobrazení indikátoru slabé baterie.

3. Nastavení a uvedení do provozu

3.1 Vybalení a obsah

Carefully unpack the BENNING MM 7-2 multimeter and verify that all components are present:

  • BENNING MM 7-2 Digital Multimeter
  • Silicone test leads with gold-plated 2mm and 4mm measuring tips (screw-on)
  • Protective carrying bag
  • Wire temperature sensor
  • 3 x 1.5V Micro/AAA/LR03 batteries
  • Pojistky (11A a 0.4A)
BENNING MM 7-2 Multimeter with included accessories: test leads, temperature probe, and carrying case.
Figure 1: BENNING MM 7-2 Multimeter and its complete set of accessories, including test leads, a temperature probe, and a protective carrying case.

3.2 Instalace baterie

The BENNING MM 7-2 requires 3 AAA batteries for operation. To install or replace batteries:

  1. Ujistěte se, že je multimetr VYPNUTÝ a odpojte všechny měřicí kabely.
  2. Najděte kryt přihrádky na baterie na zadní straně multimetru.
  3. Pomocí šroubováku otevřete přihrádku na baterie.
  4. Vložte tři 1.5V baterie typu AAA a dodržujte správnou polaritu (+/-) vyznačenou uvnitř přihrádky.
  5. Nasaďte kryt prostoru pro baterie a zajistěte jej šroubem.

3.3 Připojení měřicích kabelů

Always connect the black test lead to the 'COM' (common) jack. Connect the red test lead to the appropriate input jack for the desired measurement:

  • VΩHz: Za svtage, resistance, frequency, capacitance, and diode/continuity tests.
  • µA mA: Pro mikroampere and milliampaktuální měření.
  • A: Pro ampaktuální měření.

4. Návod k obsluze

4.1 Zapnutí/vypnutí a zobrazení

Turn the rotary switch to any function to power on the multimeter. Turn it to 'OFF' to power off. The 4 5/6 digit LCD display shows measurement values, units, and various indicators. The backlight can be activated for improved visibility in low-light conditions.

4.2 svtagMěření (DC/AC)

The BENNING MM 7-2 can measure both DC and AC voltages up to 1000V. It features an AutoV function for automatic AC/DC switching and range selection.

  1. Turn the rotary switch to 'V'. The multimeter will automatically detect AC or DC voltage.
  2. Connect the black test lead to 'COM' and the red test lead to 'VΩHz'.
  3. Zapojte měřicí sondy paralelně k měřenému obvodu nebo součástce.
  4. Přečtěte si svtage hodnota na displeji.
BENNING MM 7-2 Multimeter measuring voltage in an electrical control panel.
Figure 2: The BENNING MM 7-2 Multimeter actively measuring voltage within an electrical control panel, demonstrating its application in industrial settings.

4.3 Current Measurement (DC/AC)

The multimeter supports current measurements from microamperes to 10A. Ensure proper fuse protection and correct terminal selection.

  1. Turn the rotary switch to 'µA mA' or 'A' depending on the expected current range.
  2. Connect the black test lead to 'COM'. Connect the red test lead to 'µA mA' or 'A' accordingly.
  3. Důležité: Connect the multimeter in series with the circuit to be measured. Open the circuit and insert the multimeter.
  4. Odečtěte aktuální hodnotu na displeji.
BENNING MM 7-2 Multimeter measuring 4-20mA current in an industrial control system.
Figure 3: The BENNING MM 7-2 Multimeter performing a 4-20mA current loop measurement within an industrial control system, highlighting its capability for process control applications.

4.4 Měření odporu

Measure resistance up to 60 MOhm.

  1. Turn the rotary switch to 'Ω'.
  2. Connect the black test lead to 'COM' and the red test lead to 'VΩHz'.
  3. Před měřením odporu se ujistěte, že je obvod nebo součástka bez napětí.
  4. Připojte měřicí sondy napříč součástkou.
  5. Odečtěte hodnotu odporu na displeji.
BENNING MM 7-2 Multimeter measuring the resistance of small electronic resistors.
Figure 4: The BENNING MM 7-2 Multimeter accurately measuring the resistance of small electronic resistors, demonstrating its precision for component testing.

4.5 Měření kapacity

Measure capacitance up to 10000 µF.

  1. Turn the rotary switch to 'CAP'.
  2. Connect the black test lead to 'COM' and the red test lead to 'VΩHz'.
  3. Před měřením se ujistěte, že je kondenzátor zcela vybitý, aby nedošlo k poškození multimetru.
  4. Připojte měřicí sondy na svorky kondenzátoru.
  5. Odečtěte hodnotu kapacity na displeji.
BENNING MM 7-2 Multimeter measuring the capacitance of a large blue capacitor.
Figure 5: The BENNING MM 7-2 Multimeter accurately measuring the capacitance of a large blue electrolytic capacitor, illustrating its capability for component analysis.

4.6 Měření frekvence

Measure frequency up to 1 MHz (logic level) or 50 kHz (mains level).

  1. Turn the rotary switch to 'Hz'.
  2. Connect the black test lead to 'COM' and the red test lead to 'VΩHz'.
  3. Připojte měřicí sondy ke zdroji signálu.
  4. Odečtěte hodnotu frekvence na displeji.

4.7 Měření teploty

Measure temperature from -200 °C to +1090 °C using the included wire temperature sensor.

  1. Turn the rotary switch to '°C/°F'.
  2. Connect the temperature sensor to the 'VΩHz' and 'COM' jacks, observing polarity if indicated on the sensor.
  3. Place the sensor tip on or near the object whose temperature is to be measured.
  4. Odečtěte hodnotu teploty na displeji.
BENNING MM 7-2 Multimeter measuring temperature with a yellow wire temperature sensor.
Figure 6: The BENNING MM 7-2 Multimeter displaying a temperature reading, with a yellow wire temperature sensor connected and ready for use.

4.8 Continuity Test and Diode Test

The multimeter provides fast optical and acoustic indications for continuity and diode testing.

  • Kontinuita: Turn the rotary switch to 'Ω'. Press the 'RANGE' button until the continuity symbol (speaker icon) appears. A continuous beep indicates continuity (<100 Ω - 420 Ω).
  • dioda: Turn the rotary switch to 'Ω'. Press the 'RANGE' button until the diode symbol appears. Connect the red lead to the anode and black lead to the cathode. A forward voltage drop (e.g., 0.5V to 0.8V) will be displayed for a good diode.

4.9 Speciální funkce

  • AutoV Function: Automatically switches between AC and DC voltage measurement and selects the appropriate range.
  • LoZ Function: Low input impedance (> 2 kΩ) to suppress capacitive/inductive interspersed voltages, providing more stable readings in certain environments.
  • Low Pass Filter (HFR): High frequency suppression (1000 Hz) for accurate measurements on clocked motor drives.
  • VoltSensor: Non-contact and single-pole phase and cable break testing with two sensitivities, indicated by LCD and buzzer.
  • Optical and Acoustic Socket Control: Provides a warning when the measuring range is incorrectly selected for µA/mA and A ranges.
  • Pozastavení dat (HOLD): Zmrazí aktuální údaj na displeji.
  • Min/Max/Avg (MIN MAX AVG): Records minimum, maximum, and average values over a measurement period.
  • Měření relativní hodnoty (REL): Displays the difference between the current reading and a stored reference value.
  • Peak Memory (PEAK): Captures fast transient peaks.
  • Duty Cycle Measurements: Measures the duty cycle (%) of a signal.
  • 4 mA - 20 mA DC Current Loop (%): Measures the percentage of a 4-20mA current loop, useful in industrial control systems.

5. Údržba

5.1 Čištění

Otřete multimetr casing s reklamouamp cloth and mild detergent. Do not use abrasive cleaners or solvents. Ensure the device is dry before use.

5.2 Výměna baterie

Refer to section 3.2 for battery installation instructions. Replace batteries when the low battery indicator appears on the display to maintain measurement accuracy.

5.3 Výměna pojistky

If the current measurement functions cease to work, the fuses may need replacement. The BENNING MM 7-2 uses specific fuses:

  • For µA/mA range: 0.4A fuse
  • For A range: 11A fuse

Výměna pojistky:

  1. Ujistěte se, že je multimetr VYPNUTÝ a odpojte všechny měřicí kabely.
  2. Open the battery compartment cover (refer to section 3.2).
  3. The fuse compartment is typically located near the battery compartment. Carefully remove the old fuse.
  4. Install a new fuse of the exact specified type and rating.
  5. Close and secure the compartment cover.

6. Řešení problémů

If you encounter issues with your BENNING MM 7-2, refer to the following common problems and solutions:

  • Bez displeje/napájení:
    • Check if the rotary switch is set to an ON position.
    • Verify battery installation and charge level. Replace batteries if low.
  • Nesprávné čtení:
    • Ensure test leads are connected to the correct input jacks for the selected function.
    • Check if the measurement range is appropriate (though AutoV and auto-ranging help).
    • Verify the integrity of test leads; replace if damaged.
    • Ensure the circuit under test is de-energized for resistance/capacitance measurements.
  • Měření proudu nefunguje:
    • Check and replace the appropriate fuse (0.4A for µA/mA, 11A for A).
    • Ensure the multimeter is connected in series with the circuit.
  • Indikace „OL“ nebo přetížení:
    • The measured value exceeds the selected range. Switch to a higher range if available, or ensure the input is within the multimeter's maximum specifications.

If problems persist, contact BENNING customer support.

7. Specifikace

ParametrSpecifikace
Zobrazit4 5/6 digit LCD (60,000 counts) with backlight, analogue bar display
Skutečné RMSAC, AC + DC
DC svtage Dosah0.01 mV až 1000 V
AC svtage Dosah0.01 mV až 1000 V
Rozsah DC proudu0.01 µA to 10 A
AC proudový rozsah0.01 µA to 10 A
Rozsah odporu0.01 Ω to 60 MΩ
Rozsah kapacity0.01 nF to 10000 µF
Frekvenční rozsah0.001 Hz to 1 MHz (logic level), up to 50 kHz (mains level)
Teplotní rozsah-200 °C až +1090 °C
Test kontinuity<100 Ω - 420 Ω (optical/acoustic)
Test diod3.0 V (optical/acoustic)
Measuring Circuit CategoryCAT IV 600V, CAT III 1000V
Zdroj napájení3x 1.5V AAA baterie
Rozměry produktu5.1 x 8.9 x 19.3 cm
Hmotnost položky420 gramů
Bezpečnostní standardUL
Speciální funkceAutoV, LoZ, Low Pass Filter (HFR), VoltSensor, Data Hold, Min/Max/Avg, REL, Peak, Duty Cycle, 4-20mA loop (%)

8. Záruka a podpora

For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official BENNING webUschovejte si doklad o koupi pro případ reklamace.

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