2.5-99999 Contact Non-contact RPM Meter Speedometer Digital Tachometer

Description:

1.2.1 When using, you must use the correct function and range.
1.2.2 Do not exceed the protection range of each range to measure the value.
1.2.3 Do not touch the top of the test leads (metal parts) when the meter is connected to the measuring circuit.
1.2.4 In the measurement, if the measured voltage is higher than 60V DC or 30V AC (RMS), should pay attention to keep the fingers always in the table after the finger care device.
1.2.5 Do not measure the voltage when the voltage between the measuring end and the earth exceeds AC 600V.
1.2.6 Before turning the change switch to change the measuring function, remove the test leads from the circuit under test.
1.2.7 Do not live measurement resistance, capacitance, diode and test circuit off.
1.2.8 In the current, resistance, capacitance, diode and line continuity test range, care should be taken to avoid connecting the meter to the voltage source.
1.2.9 Do not measure the capacitance until the capacitor is fully discharged.
1.2.10 Do not use this instrument near explosive gas, steam or dust.
1.2.11 If you notice any abnormality or malfunction of the instrument, stop using it.
1.2.12 Do not use the instrument unless the instrument case and battery cover are fully fastened in place.
1.2.13 Do not store or use the instrument in direct sunlight, high temperature, high humidity.

Technical indicators

Ambient temperature: 23 ± 5 ℃ Relative humidity: <75%
3.2.1 True rms zero input
3.2.1.1 The measurement of sine wave signal, the use of true RMS measurement method than the traditional average response method error is small.
3.2.1.2 True RMS The instrument can accurately measure the sine wave signal, but if it is on the AC function, the instrument may display 1 to 50 if the measured signal is not input (shorted at the AC voltage range and the input terminal) Word between a reading. These deviations are normal. Within the specified measuring range, they do not affect the accuracy of the multimeter to measure alternating current.
3.2.1.3 True RMS requires that the input signal reach a certain level for measurement. Therefore, the AC voltage and current range is specified between 2% and 100% of full scale.



3.2.2 DC voltage

- Input impedance: 10MΩ
- Maximum input voltage: 600V DC or 600V AC (rms)
Note:
In the small voltage range, the pen is not connected to the circuit under test, the instrument may have beating the reading,
This is normal, this is because the instrument caused by high sensitivity, does not affect the actual measurement results.


3.2.3 AC voltage

- Input impedance: 10MΩ

- Maximum input voltage: 600V AC (RMS) or 600V DC

- Frequency range: 40 ~ 1000Hz True RMS

Note:
In the small voltage range, the pen is not connected to the circuit under test, the instrument may have beating the reading,
This is normal, this is because the instrument caused by high sensitivity, does not affect the actual measurement results.



3.2.4 Alternating current

- Overload protection: mA range fuse (self-recovery fuse 200mA / 250V)
10A range without insurance
- Maximum input current: mA: 600mA DC or AC rms;
10A: 10A DC or AC rms;
When the measured current is greater than 5A, the continuous measurement time is not longer than 15 seconds, after the measurement to stop the current measurement for more than 1 minute.
- Frequency response: 40Hz ~ 1000Hz True RMS.

3.2.5 DC

- Overload protection: mA range fuse (self-recovery fuse 200mA / 250V)
10A range without insurance
- Maximum input current: mA: 600mA DC or AC rms;
10A: 10A DC or AC rms;
When the measured current is greater than 5A, the continuous measurement time is not longer than 15 seconds, after the measurement to stop the current measurement for more than 1 minute.


3.2.6 Frequency

- Overload protection: 250V DC or AC (rms)
- Input voltage range: 600mV ~ 10V AC (with the measured frequency increases, the input voltage should also increase)


3.2.7 Duty cycle

- Frequency response: 10 ~ 10MHz

- Input voltage range: 600mV ~ 10VAC (with the measured frequency increases, the input voltage should also increase)

- Maximum input voltage: 250V AC (rms)

Resistance

- Open circuit voltage: approx. 1.0V
- Overload protection: 250V DC or AC (rms)

Transistor test

Capacitance

- Overload protection: 250V DC or AC (rms)

Temperature test

- Overload protection: 250V DC or AC (rms)