I bought GM328A version 1.12k about 7 years ago:


Now online I see newer version of it:


These new ones have a encoder with push button for control, while mine only had one tactile button. Newer ones also have separate terminal blocks for voltage measurement (input) & PWM & square wave (output), when mine had none. I'm assuming the terminal blocks in the new ones are just using two of the three I/O pins.

I tried my GM328A if it can indeed read voltage like the newer ones by applying 5V on two of the three pins with different combinations. Applying said voltage only dims & flickers the screen. The selection screen also do not have a "voltage" choice. So needless to say, version 1.12k (software at least) cannot read voltage.

If the terminal blocks are just two off the three I/O pins, then aside from voltage measurement, what else can these new GM328A do that my old one cannot & what other improvements have there been? I'm asking as I'm thinking of purchasing one of these newer ones.

 

Whether I buy a new one, I'll still keep the old one to cross reference the measurements & results of the new one. I have a feeling the old one will be more accurate in many instance.