DMM Aneng AN8002

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This is a cheap DMM with all common function.

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There was no box included with the DMM, only a plastic bag with everything inside.

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It included the DMM, a pair of probes, a thermocoupler, a bag and a manual.

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The standard probes has removable tip covers.

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The plug is fully shrouded.

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The thermocoupler is the usual cheap type.

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The body of the DMM feels solid, the plastic is rather smooth, i.e. the DMM can easily slide on a surface. The tilting bale is a bit flimsy and do not give enough support for pressing buttons and turning the range switch.

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Display

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The above picture shows all the segments on the display.

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Typical display during usage, it will show the number and what measurement is selected.



Functions

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Buttons: Rotary switch:
Input

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Measurements 1uF

A look at the capacity measurement waveform.

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Frequency input resistance. mV looks similar, except DC is high impedance at low voltage.

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Tear down

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Four screws and the back could be removed.

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Three more for the circuit board and two for the display.

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On this side there is only the switches and the connection to the display. The 10A current shunt is missing a solder joint on this side.

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The two small fuses are not designed for high CAT ratings.
R24 is a 1ohm resistor for mA current range and R23 is a 99ohm resistor for the missing uA range. R29 and R30 is the 10Mohm input divider.
D5 is a bidirectional zener diode to protect the mA current shunt.
Q3 & Q4 is input protection together with PTC1. The DMM chip is under the black blob and the IC1 (24C02) beside it is a EEPROM to store functions and calibration in.

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Conclusion

The meter is easily within the specified tolerances (Except 10A) and it has lot of functions and ranges, but the CAT rating is fake.

This is a small DMM in size, but has most of the expected functions in a universal DMM. It is missing the uA current range,

I do not like the small fuse size, they cannot break high voltage or high current and they can be hard to source. The current range on the voltage input is also a bad idea.

I will call it good DMM for hobby use, but keep it away from anything with mains voltage and lots of amps.



Notes

This meter exist with many different names on it and small variations in functions.

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