Aneng AN8008 multimeter - 9999 counts.
- no NCV (Non-Contact Voltage detection)
- no temperature measurement
- square wave generator output (not present in AN8009)
Range switch is not the best I've seen.
Buzzer is latching and reasonably quick, but personally I would prefer "analog" one.
My other complaint would be rather poor display visibility when looking from angles above it (from below it is fine).
Note: auto power off can be disabled by holding SEL/HOLD button while powering on. Multimeter would still beep after each 15 minutes or so as when auto power off normally would be about to trigger.
Some interesting notes from https://ondustrial.com/accessories/digital-multimeters/an8008-digital-multi-meter-aneng/:
- 1 VAC is 5% down at 2.2kHz (RMS will not work at the frequency)
- At 1Vrms input frequency range is from 1Hz to 3MHz
- Input impedance is 10Mohm on DC and AC
- mV range is high input impedance for DC up to about 2V then it drops to 2kOhm, mvAC is similar, except it is capped with a 10Mohm resistor
- Frequency input needs about 600mVrms to work at 1kHz.
- Frequency counter and duty cycle works without zero crossing in Hz range.
- Duty cycle works from 2% to above 99% at 100kHz with 2Vpp (1Vpp do not work), precision is within 0.7 (About 0.6 too low).
- Hz input impedance is 10Mohm up to about 12V where it is clamped after the PTC
- 10A range is badly calibrated at high current
- 10A range will change some percent at 5-10A current due to heating
- 10A range will give an audible alarm when current is above 10A (uA will not)
- Ohm needs about 2.5s to measure 100ohm
- Ohm voltage is 1.0V open and 0.42mA shorted (same as continuity)
- Continuity is fast (About 20ms); note: it actually seems slow to me and I would prefer continuity test from cheaper meters
- Continuity beeps when resistance is below 50ohm.
- Diode voltage is 3.2V with display of up to 3.000V with 0.2mA, maximum current is 1.8mA shorted
- 70000uF takes about 8 seconds to measure.
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