Measuring instruments
VR

Product function display:

 

1.DC voltage / AC voltage automatic scanning test (DCV / ACV)

Operation Guidance for touch screen digital multimeter NF-5330C:

Input impedance: 10MΩ; overload protection: 1000V DC or 750V AC peak.ture Validity Measurement: frequency response 50Hz-1kHz;

The specific operations are as follows:

1-1. Long press POWER is greater than 2S, the boot display is automatically scanned state "AUTO".

1-2. The black test lead is negative, the red test lead is positive, and the test lead reliably touches the test point.

1-3. When the voltage measured at the negative end of the black test lead input port and the positive end of the red test lead is greater than 0.8V, regardless of the AC voltage or the DC voltage, the meter will compare the DC component and the AC component, take the larger component signal, and then according to the measured value The size is automatically switched between 6V/60V/600V/1000V, and then the measured value is displayed on the LCD.


                                                                        Accuracy 

Range

6000counts

Resolution

DC/AC6V

  ±(0.8%+5)

0.001V

DC/AC60V

0.01V

DC/AC600V

0.1V

DC1000/AC750V

  ±(0.8%+10)

1V

Note:

1) The input voltage must not exceed DC1000V or AC750V. If it exceeds, there is danger of damage to the instrument circuit. When high voltage circuit, pay special attention to avoid electric shock;

2) After completing all measurement operations, disconnect the test leads from the circuit under test.

Input impedance: 10MΩ; overload protection: 1000V DC or 750V AC peak.


2.Resistance Measuremeter

Operation Guidance for NF-5330C for resistance measuremeter:

2-1. The boot display is in the automatic scan status "AUTO".

2-2. The black test lead is negative, the red test lead is positive, and the test lead reliably touches the test point.

2-3. If the measurement resistance at both ends of the test lead is less than 50Ω, the buzzer will emit a continuous beep, and fast buzzer measurement is required. Cycle the power button to enter the buzzer for rapid measurement.fast buzzer/diode measurement, this function can be automatically switched according to the needs of the measurement.

2-4. If you are measuring the resistance of a closed loop, you must discharge the resistance at both ends of the resistance to be measured. Otherwise, if the voltage in the loop is greater than 0.8V, the meter will mistake it for voltage measurement and enter the electricity measurement mode.

2-5.When measuring the value at the negative end of the black test lead input port and the positive end of the red test lead, the meter will automatically switch between 600Ω/6kΩ/60kΩ600kΩ/6MΩ/60MΩ according to the resistance measurement value, and then the measured value will be displayed on the screen.


                                                                                            Accuracy

 Range

6000countsResolution
600Ω±(0.8%+5)0.1Ω
6kΩ

±(0.8%+3)

60kΩ

10Ω

600kΩ

100Ω

6MΩ

1KΩ

60MΩ

±(2.5%+3)

10KΩ

Note:

When measuring low resistance, the test leads will bring internal resistance. In order to obtain accurate readings, you can record the short circuit value of the test leads first, and subtract the value when the test leads are short circuited from the measurement readings;


3. Fast continuity test / diode / capacitor

Range

Display Value

Test Condition

AUTO

Diode forward voltage drop

Forward DC current is about 1mA, open circuit voltage is about 3V

The buzzer sounds long and the resistance of the test is less than (50±20) Ω.

Open circuit voltage is about 0.4V, press "power" for two-speed function switching


4. Capacitance(C)

Overload protection: 1000V DC, 750V AC peak.

4-1. The boot display is in the automatic scan status "AUTO".

4-2. The black test lead is negative, the red test lead is positive, and the test lead reliably touches the test point.

4-3. If you need fast continuity test/diode/capacitance measurement, constantly trigger the "power" switch, enter the fast continuity test/diode/capacitance measurement in one cycle, and select the corresponding function measurement according to the measurement requirements. When measuring the capacitance, the measured capacitance The size will automatically select different ranges, and the measured value will be displayed on the LCD. The capacitance measurement range is 10nF/100nF /1uF/10uF/100uF/1mF/10mF/60mF.

Note:

1) When measuring capacitance with 10nF file, there may be residual reading on the screen display value. This number is the distributed capacitance of the test pen. It is an accurate reading and can be subtracted after measurement.

2) When the large capacitance file measures severe leakage or breakdown capacitance, some values will be displayed and unstable; when measuring large capacitance, the reading takes several seconds to stabilize, which is normal when measuring large capacitance;

3) Please fully discharge the capacitor before testing the capacitor capacity, otherwise it will enter the voltage measurement mode.

4) Unit: 1F=1000mF, 1mF=1000uF, 1uF=1000nF, 1nF=1000pF

                                                                         Accuracy

 Range

6000counts Resolution

10nF

±(3.5%+20)

10pF

100nF

100pF

1uF

1nF

10uF

10nF

100uF

100nF

1mF

1uF

10mF

10uF

60mF

±(5%+3)

100uF


5. NCV measurement;

The operation for NF-5330C multimeter for NCV measurement is as following:

5-1. Press and hold the “NCV/LIVE” button; enter the EF measurement.

5-2. The front end of the meter has NCV test points. As long as the point is close to the AC voltage, the buzzer will emit different continuations according to the different strength of the signal, and the LCD will also display according to the strength of the signal. Different number of segments.

5-3.Cycle to trigger "NCV/LIVE" key, enter live live live live wire measurement, display live character on LCD, close to live wire test point with a red meter, and make reliable contact with the point, the black meter end is suspended, and does not contact any test point; if the test point is live wire, the LCD will display OL, and the buzzer will send continuous sound.


6.Frequency measurement:

Input sensitivity: 1V rms; overload protection: 550V DC or AC peak (no more than 10 seconds)

Frequency measurement Operation Guidance:

1.trigger power key; switch to frequency measurement function;

2.The black test lead is negative, the red test lead is positive, and the test lead reliably touches the test point;

3 Measurement values will be displayed on the LCD.

                                                                                            Accuracy

 Range

6000counts Resolution

10Hz

±(0.1%+3)

0.01Hz

100Hz

0.1Hz

1kHz

1Hz

10kHz

10Hz

100kHz

100Hz

1MHz

1kHz

10MHz

10kHz


Note:

1) When the input exceeds 10Vrms, it can be read, but the error may be larger;

 2) In a noisy environment, it is best to use a shielded cable when measuring small signals;

 3) When measuring high voltage circuits, special care should be taken to avoid electric shock;

 4) It is forbidden to input voltage values exceeding 250V DC or AC peak to avoid damage to the meter.


7.Automatic switch machine

   When the instrument is out of service for about 5 minutes, the instrument will automatically power off; to restart the power supply, long press the "power" key for more than 3 seconds, and the LCD will display as "auto scan" AUTO ",

In order to make it more convenient for the user, the design of the machine adds the design of continuous operation and power supply, that is, the user will not automatically shut down the machine during the use process, and can only enter the shutdown state after 5 minutes of stop using,

Warning Info:

 In the manual non measurement state, no matter the AC voltage or DC voltage level, because the instrument probe is completely welded at the input end, there will be certain data on the LCD. In the design, we define the manual DC voltage level, the input end has 10 words, the AC voltage level has 100 words, and the capacitance has 100 words. In this state, we default it to no measurement state, 5 minutes It will turn off automatically.


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