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| U1272A update |
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| PetrosA:
I've been using mine at work and also (while at work...) playing around with the switch to see if I could reproduce any of the issues. Some but not all the halfway positions give screwy readings, which may only show up while turning in one direction and not the other - for instance: Moving from OFF to ACV will give a 0.L readings (no mode symbols) and secondary display flashes between 0L and 301(?) - ACV to OFF just shuts the meter off; Moving from ACV to AC mV will change my secondary reading from temp to DCV and locks up the volt reading at 7.5V AC, while moving back from AC mV to ACV will make the mV reading jump around until I move the dial far enough that it switches back to ACV; Between mVAC and VDC both directions seem ok, secondary display remains fine. Between VDC and mVDC in either direction the display goes wonky until it settles on 0.L, secondary display remains fine; From mVDC to Ohms it goes into the 0.L state in volts mode - from Ohms to mVDC the reading goes from 0.L Ohms to DCV mode with 21 MOhms displayed (both the DCV symbol and MOhms symbols are displayed), secondary display remains fine; Ohms to diode test also shows both DCV and Ohms symbols with 21 MOhms. Move it slightly further and the voltage ramps up, the meter beeps a few times and finally displays . 0L V (additional space between decimal and 0), DCV symbol and diode symbol are active, secondary display remains fine; From diode check to cap check the meter will start a steady beep and displays both DCV and diode symbols with a 0.0004V reading. Move further it will do the same kind of ramp up as between ohms and diode. The opposite direction will activate the DCV symbol and give a dead reading for about 10 seconds, after which it goes to .0L Between A and uA the display goes wonky again, with readings as high as 12A shown. From uA to A, the display will go to 0L. and the backlight stays on (this seems to be connected to the lead sensors). The bigger problem for me with the two current settings has to do with the alarm. Going from Off to A, both inputs work fine with no alarm. Once the meter has been in uA range, going back to mA/A setting will produce alarm beeps in one, the other or both inputs until the meter "gets the message" (no standard time) that it's ok for the lead to be in either of the two holes. This continues until I shut the meter off again (see video). It will also sometimes beep a warning in volt mode with the probe in the volt terminal after being in uA mode (I wasn't able to capture this for the video :( ) |
| Kiriakos-GR:
Nice find PetrosA , I will start also to believe what some one else wrote , in another similar thread : That looks like that some one loaded windows Vista , on a windows XP hardware. |
| PetrosA:
I forgot to add that I haven't had any issues during normal use with my 1272 except for the probes alarm, and that's been rare since I'm normally using a clamp meter (U1211A) for current. I just happened to be measuring current on a SMPS feeding a gang of LEDs at >25kHz and had to use this meter for that. |
| Kiriakos-GR:
Just received an reply from Agilent , about an question that I did related to firmware updates . It is confirmed that both U1253B OLED DMM and U1270 series , could receive firmware updates, by the use of the IR-USB cable . For the U1253B there is all ready one update available . (resolves an issue about the start-up screen design ) Additionally the users evaluating program about HH of Agilent is on Hold , and my own demo unit too. Lets hope that their technicians works faster and coordinates better, than the postman that they use, for delivering the mail . |
| PetrosA:
I'm getting a response ready for someone at Agilent who I contacted about this. Can I assume from the lack of responses that no one else has been able to reproduce the mA/A-uA jack warning alarm? |
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