| Electronics > Repair |
| Fluke 289 not quite sorted. |
| << < (18/49) > >> |
| retiredcaps:
--- Quote from: nixxon on October 13, 2018, 03:56:49 pm ---The resistance reading is a little funny, reading 25 MegaOhms initially, but after shorting the probes for a brief moment it reads ~3.7 MOhms with open probes... --- End quote --- So the DCV and ACV mode are accurate? Just resistance is bad? To confirm, with open probes you get 25M ohm? If you short the probes, you get 3.7M ohm? |
| nixxon:
After turning the dial into resistance mode, the display shows 25 M Ohms while probes are open circuit. Shorting the probes gives a reading of 0.15 - 0.25 0.09-0.10 Ohms When the probes are separated again, the display doesn't return to 25 M Ohms, but shows ~3.7 M Ohms (while probes are open circuit) |
| retiredcaps:
--- Quote from: nixxon on October 13, 2018, 10:15:36 pm ---After turning the dial into resistance mode, the display shows 25 M Ohms while probes are open circuit. When the probes are separated again, the display doesn't return to 25 M Ohms, but shows ~3.7 M Ohms (while probes are open circuit) --- End quote --- The non display of 0L might indicate that one or more of your input protection circuits has been damaged. You can measure all in circuit and see if they are good. If not, desolder them to verify. A MOV should measure infinite resistance. The PTC should be around 1.1k ohm. The fusible resistor should be around 1k ohm. |
| nixxon:
I forgot to mention that the VAC and VDC measurements are all good compared to my Fluke 83V. The screenshot from the 289 FW 1.16 installer reveals the software and hardware versions. Should I press the "Next" button and go for a 1.16 update? Maybe everything will be working again after a fresh FW install? |
| nixxon:
I performed the FW 1.16 update and all seemed well. The installer confirmed update was competed and everything seemed ok with the install. Just after atomatic reboot of the 289 it started beeping 4 times per second. I started FlukeView Forms, but could see no data from the DMM in FlukeView Forms anymore. I was certain I had bricked this sick puppy for good. I completed a firmware install again with no error messages, but there was no change in meter behavior. Just beeping. Almost the same way as when you have your probes connected the wrong way... So - after fiddling with the rotary switch and buttons, I managed to silence the meter by setting the selector to current measurement mode (A/mA or uA), while probes are connected to the COM and V/Ohm jacks. The data is again registered in FlukeView Forms. While in current measurement mode, the meter is silent until I move the red probe from the V/Ohm-jack to the appropriate A jack. This behavior is opposite of what to expect. Connecting the red lead to the mA/uA jack does not make the meter beep. Maybe the probe position sensor logic in the A jack has failed in some way (inverted signal)? For the first time it is now possible to turn the meter off with the soft on/off button. |
| Navigation |
| Message Index |
| Next page |
| Previous page |