Products > Test Equipment
EEVBlog 121GW Multimeter Firmware Details
CDaniel:
--- Quote from: GeoffreyF on November 06, 2018, 02:14:31 am ---
--- Quote from: CDaniel on November 05, 2018, 11:35:14 pm ---I installed v1.52 , so far I see a big improvement in reducing the 50Hz noise in resistance mode , now when measuring Mohm resistors you can touch the probes and cables .
The beep sound in diode mode is still laggy ...
--- End quote ---
Did it report 1.53 when when you first started it? I think resistance resolution seems faster. I don't think that beep is supposed to happen with all diodes. Beep happens only when resistance is very low. It's responding to apparent continuity.
--- End quote ---
Yes of course it display 1.53 ...
The beep when you are shorting the probes is laggy , so when measuring a shorted transistor or diode you have to wait a moment ... not good at all . Every other multimeter is much responsive .
In continuity mode the beep is very fast responding , so I don't see any reason why in diode mode is laggy .
GeoffreyF:
--- Quote from: CDaniel on November 06, 2018, 07:13:32 am ---
Yes of course it display 1.53 ...
The beep when you are shorting the probes is laggy , so when measuring a shorted transistor or diode you have to wait a moment ... not good at all . Every other multimeter is much responsive .
In continuity mode the beep is very fast responding , so I don't see any reason why in diode mode is laggy .
--- End quote ---
I am using Probemaster probes but even with the ones which came with (that I believe are UEI Test) - I have found no lag at all on beep, simply striking the probe tips against one another or bring the tips together, is an immediate beep. Something may be off with your unit. When you short the probes, what is the resistance reading?
CDaniel:
The beep lag is only in diode mode ( maybe 0.5sec ) , in continuity mode is very fast .
Resistance is zero when shorting the probes
GeoffreyF:
There is no mention of diode beep in the manual. According to the manual there is a 2.2k resistor and a PTC in series with the DUT. Literally the diode test is not supposed to Beep except that is a side effect of the continuity function for diodes with low enough forward current to trigger it. It's hardly surprising that when the beep happens - it is "laggy". it's not a simple continuity test.
You are wanting something to work that is not part of the published feature set.
CDaniel:
Every decent multimeter has the beep in diode mode ... and is fast , feature or not :D
If you really work with the multimeter repairing something you will know why .
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