Beta testing observations with the Android app

Hello all

After spending some time with the beta version of Pokitmeter and the Android app (0.9.12) running on a Pixel 2, I have some observations to share:

1. Multimeter

1.1.  My biggest issue with the current version of the Android app is the inconsistent number of digits.  When I measure, say, a 1.5V battery, I can get three figures, 1.12 for example, which matches my desktop meter pretty well, but when I measure a 9 volt battery I only get two like 8.2. 

1.2. When I measure a 100 ohm resistor I get 100.5 (bench meter reads 100.2), but a 470kOhm reads 0.48Mohm and a 910K reads 0.9MOhm.  Given that the latest precision specifications in the FAQ forum post entitled "What are Pokit's technical specs?" states the resistance measurement is ±5%, I would not expect to make precision resistor measurements in the field with Pokitmeter.

2.3 The Diode tester isn't ready yet.  Instead of a forward drop voltage, it shows 0 or 1.0 depending on polarity.

2. Oscilloscope

2.1. The oscilloscope is pretty good, all things considered.  The cursors are quite usable; I was able to measure the frequency of one waveform as 52 Hz that my Rigol measures as 51. 

2.2. The falling trigger worked as expected, but the rising trigger needs work - it wasn't obvious to me what exactly the rising trigger was triggering on. 

2.3. The frequency domain display worked pretty well, but on the Android app, you have to zoom way out to see it all, then then zoom back when you go back into the time domain in order to see your waveform again. 

3. Logger

3.1. I didn't do any extensive or long term tests of logging, but the simple test I gave it, a minute of one second samples of a varying voltage, worked as expected.  This version of the Android app was missing the feature to store sessions in an external file.

All in all, a very promising start for such a compact form factor.  I look forward to app and firmware updates to make it even better.

Brian.