I already posted in the discussion thread about a problem I have with Vac readings. Now I will switch to the correct place for this.
In 5Vac mode I get wrong readings.
Today I checked the ZERO OFFSET CALIBRATION and had to find out, that only in 5Vac range mode with shorted inputs I get a reading of 0,499xVac. With open input I get nearly the same value of about 0,5Vac.
In all other Vac (and Vdc) ranges I get 0,0xxV. So I tried to calibrate only the zero offset in Vac 5V range mode. During the count down it displays the 0,499xV and after the calibration I still have this offset with shorted inputs on the 5Vac range. At the end of the calibration countdown I see "OFF-E" for about half a second what is not mentioned in the manual.
I have two references from voltagestandard.com. The 121GW is spot on for all voltage measurements I can do (Vdc 0,350V up to 10.000V and Vac 5V).
So there must be something wrong with the 5Vac range mode of my 121GW.
Another thing happened today while testing for the first time. When I switched from left side off to V mode the meter did not turn on. I taped on the mode switch still in this mode and it turned on. So there must be another problem with my 121GW.
You can read my postings and realted answers if you want to get the complete story:
https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg1446232/#msg1446232
https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg1447697/#msg1447697
https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg1447957/#msg1447957
https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg1465469/#msg1465469
https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg1469130/#msg1469130
https://www.eevblog.com/forum/testgear/eevblog-121gw-discussion-thread/msg1469890/#msg1469890
Source code not available.
To me this was the biggest bug of them all and enough reason to not buy this meter.
Maybe I'll revise my opinion when a "community" alternative version of the software for this meter becomes available.
I already posted in the discussion thread about a problem I have with Vac readings. Now I will switch to the correct place for this.
In 5Vac mode I get wrong readings.
Today I checked the ZERO OFFSET CALIBRATION and had to find out, that only in 5Vac range mode with shorted inputs I get a reading of 0,499xVac. With open input I get nearly the same value of about 0,5Vac.
In all other Vac (and Vdc) ranges I get 0,0xxV[...]
Thankyou for your message we are aware of your issue, the issue with the on-off is almost certainly due to the shim fix (this will be shipped to you at some point soon, it will resolve the issue if that is an issue). It does sound like your 5V AC range has an issue, there is a new firmware update coming out. It might improve the situation for you and if you did want to recalibrate it would be better to do it after the next update.
Firmware 1.15 has a regression vs. 1.10.
When connecting via bluetooth and disconnecting again by closing the app (or the bluetooth connection) no connection is possible until bluetooth is switched on and off on the meter.
Firmware 1.15 has a regression vs. 1.10.
When connecting via bluetooth and disconnecting again by closing the app (or the bluetooth connection) no connection is possible until bluetooth is switched on and off on the meter.
That is unlikely as the Bluetooth is basically a UART-BLE bridge module and it hasn't been updated. It is more likely an update to windows or android that caused the issue, otherwise i'm not really sure how this could have happened.
One important thing to know is that if you simply minimize the app it is still using the bluetooth device until it is properly closed this means if you opened another instance it will not connect as the bluetooth device is already in use.
Firmware 1.15 has a regression vs. 1.10.
When connecting via bluetooth and disconnecting again by closing the app (or the bluetooth connection) no connection is possible until bluetooth is switched on and off on the meter.
That is unlikely as the Bluetooth is basically a UART-BLE bridge module and it hasn't been updated. It is more likely an update to windows or android that caused the issue, otherwise i'm not really sure how this could have happened.
Didn't I already read about this? I am not sure so I post it here in the issues thread.
When I turn off the beeper and afterwards go to diode test I get a nonstop beep with firmware 1.15.
PS: On 19th april I got a message telling me that the repair parts for the 121GW have been sent to me. They still not arrived ;-(
@ Candid
Did you receive your shims and whatnot, any update with the issue you were having?
Video of the issue is still being processed but the link is down below
my serial number is #420 (heh)
EDIT: i should add that AC and DC volt reading in the standard (non-lowZ) mode read fine (not sure about accuracy but it looks good enough compared to my UT61E)
My meter arrived a couple of days ago followed by an email from Kick-starter telling me it was my last chance to update my shipping details
Mine arrived with an immediate problem. The screen contrast and viewing angles were weird and touching the screen even very lightly caused various segments to come on. The packaging was largely OK, some bumps and bruises.
Anyway I gave the meter a bump on my bench (just on the top edge of the rubber surround) front and back. Problem solved. Not sure if the screen suffered a squish in transit or if it was pushed to hard front or back during assembly but I am thinking it was one or the other. If you have this problem you can try giving the thing a bump. Worked for me but, as they say, YMMV.