Products > Test Equipment
New ANENG Q1 9999 Counts ?
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floobydust:
It's a flop for the backlight LED going out below 2.6V and the fake 100 segment bargraph.
From the videos, it's in groups of three, so around 30 segments. Dave got fooled ;) Not really worth adding that big IC to drive a few more LCD segments?

I don't mind the negative contrast/transmissive LCD.

The DMM IC has a charge-pump for the LCD drive, add a few parts and it should be able to drive the LED's, although noise will affect the uV range.


Looking at AA battery discharge curves to 1.35V it looks like about 1/3 capacity and usable for about 60hrs at 16mA drain :(
Energizer E91
Duracell professional leakers.


Latching relays are notorious for changing states when bumped.
Not sure what this meter does if it plops over due to the crappy stand. I hope it stays safe if the relay changes by accident.
Fungus:

--- Quote from: floobydust on June 16, 2018, 07:06:53 pm ---Latching relays are notorious for changing states when bumped.
Not sure what this meter does if it plops over due to the crappy stand. I hope it stays safe if the relay changes by accident.

--- End quote ---

Sounds like a test for joe to do...

floobydust:
The PCB is still kindergarten-grade, with silly ground-pours and input traces running halfway across the world.

Transients will easily zot a PCB trace or the relay will arc contacts-coil. Let's save the world $38 and say the DMM is a bit weak.
joeqsmith:
I tried dropping the Gossen Ultra and was unable to get the relays to change states.   Transient wise, they have not changed how they protect the inputs.  I suspect it would fail roughly the same as the other Anengs I have looked at.  I also suspect the LCD lens is made from the same poor materials that melt when exposed to gasoline. 


--- Quote from: MacMeter on June 16, 2018, 07:03:22 pm ---
--- Quote from: joeqsmith on June 13, 2018, 04:56:40 pm ---At 6 min in the PTC and clamp node I suspect is the drive side for the diode, resistance, capacitance, etc. modes. The high impedance leg is the input. You should hear the relay switch in anytime you change to one of the other modes.

--- End quote ---

Might we see a new “RELAY switch” test video in the future on this model?

--- End quote ---
What is it you would want to see?  We could try to see where it breaks down at.  Dave could have used his HV supplies to at least make sure it could handle the same levels as the 121GW.  I suspect you can get it to change states with a magnetic hanger like the Gossen. 
Fungus:

--- Quote from: joeqsmith on June 16, 2018, 09:04:32 pm ---
--- Quote from: MacMeter on June 16, 2018, 07:03:22 pm ---Might we see a new “RELAY switch” test video in the future on this model?

--- End quote ---
What is it you would want to see?  We could try to see where it breaks down at.  Dave could have used his HV supplies to at least make sure it could handle the same levels as the 121GW.  I suspect you can get it to change states with a magnetic hanger like the Gossen.

--- End quote ---

How about testing it to see if it can give a dangerously incorrect reading if the relay is flipped, like the Gossen does?

(I suspect that this one won't, that the AC voltage range will be unaffected...)
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