Products > Test Equipment
U1271A/U1272A/U1273A/U1273AX models/likes/dislikes/tips
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sasmit:
Well after a month of fighting with Keysight India, writing to Daniel ( Keysight_daniel) there's no progress on this. Guess Keysight service is pathetic anywhere outside the US or Europe  and we are after all an developing nation ... who pay more for everything and get treated as if we got it for free.

I meanwhile tried to resurrect the brick by getting an USB cable spending another 50$ on an already wasted 300$, I was able to get it to firmware 3.03 but my meter is still doing strange things like Dave's original failed video. Tried various things even tried to short out the EEPROM lines while powering up to clear any stored value issues. Nothing works... it only measures continuity and current  on all other ranges it keeps on doin auto ranging with weird values. I was wondering if it's any chip on the analog front end which can be causing this, can it be fixed by replacing that chip. I don't think it's an firmware issue as I updated it to the latest firmware and it still didn't fix it.
TheAmmoniacal:
The U1272A is a fantastic DMM, and the one I've decide to keep after trying countless others.

Pros:
- Fast visual continuity buzzer (the audible one is slow)

Cons:
- Hard to use menu system (orders of magnitude better on the U1253B)
retiredcaps:

--- Quote from: sasmit on July 14, 2016, 07:18:55 am ---on all other ranges it keeps on doin auto ranging with weird values.

--- End quote ---
I don't work for Keysight, but let's get a baseline on what is happening with your meter.  Since I can't see what you are seeing, please answer the following questions (or post a youvideo showing its behaviour).

Q1) Set meter to autoranging DCV.  Measure a 9V battery. What does lcd show?  Is the reading steady or jumping all around?

Q2) Set meter to autoranging DCV.  Short the probes together.  Does it show a steady 0?

Q3) Set meter to autoranging ohms.  Measure a 1k ohm resistor.  What does lcd show?  Is the reading steady or jumping all around?

Q4) Set meter to autoranging ohms.  Short the probes together.  Does it show a steady 0?

Q5) Set meter to manual range DCV. Measure a 9V battery. What does lcd show?  Is the reading steady or jumping all around?

Q6) Set meter to manual range ohms. Measure a 1k ohm resistor.  What does lcd show?  Is the reading steady or jumping all around?

Q7) Please post clear focused pictures of your meter. We want to see both sides of the pcb and the range switch.  We want to see if there is anything obviously wrong with your pcb and/or rotary switch.

Q8) Have you or someone who may have borrowed your meter measured anything high voltage (i.e. > 240V)?
sasmit:

--- Quote from: retiredcaps on July 14, 2016, 05:37:17 pm ---
--- Quote from: sasmit on July 14, 2016, 07:18:55 am ---on all other ranges it keeps on doin auto ranging with weird values.

--- End quote ---

Let me just answer the queries in line, I will post high res photos of my meter's pcb after I take it with a Macro lens.

I don't work for Keysight, but let's get a baseline on what is happening with your meter.  Since I can't see what you are seeing, please answer the following questions (or post a youvideo showing its behaviour).

Q1) Set meter to autoranging DCV.  Measure a 9V battery. What does lcd show?  Is the reading steady or jumping all around?
         Jumping around.

Q2) Set meter to autoranging DCV.  Short the probes together.  Does it show a steady 0?
        It shows around 25 volts with a -  sign.

Q3) Set meter to autoranging ohms.  Measure a 1k ohm resistor.  What does lcd show?  Is the reading steady or jumping all around?
       Flashes intermittently till it gets to some Nano Siemens where it stays, strangely if we switch to continuity it indicates by backlight flash but      reading stays in  nS.


Q4) Set meter to autoranging ohms.  Short the probes together.  Does it show a steady 0?
       Nope

Q5) Set meter to manual range DCV. Measure a 9V battery. What does lcd show?  Is the reading steady or jumping all around?
       Jumping around.

Q6) Set meter to manual range ohms. Measure a 1k ohm resistor.  What does lcd show?  Is the reading steady or jumping all around?
       Display doesnt change but bar graph drops to half.

Q7) Please post clear focused pictures of your meter. We want to see both sides of the pcb and the range switch.  We want to see if there is anything obviously wrong with your pcb and/or rotary switch.
 will do.
Q8) Have you or someone who may have borrowed your meter measured anything high voltage (i.e. > 240V)?
 Nope , havent been able to get it working since I bought.

--- End quote ---
TheAmmoniacal:
Your meter is fucked :D
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