This thing always seemed pretty useless at measuring freq (I love it besides that), but now it must be damaged. So far it will still display 60Hz, w/o probes attached, but probing anything from the sig.gen, it just sits at 999.99Hz, and the Vrms seems stuck at root 2, 1.414V, or a little lower. Regardless of the wave, like sine/sqr/pulse, and the amplitude/freq settings/duty cycle.
And it's doing it on the main VAC setting, both displays (there's a dual display), and on the various mVDC and mVAC dial settings, same thing 999.99Hz, stuck at basically root2 volts, and stuck at 30.85% duty cycle, regardless of input.
The only mistake I made lately, (that I'm aware of) was on mVDC range, I momentarily connected just under 1VDC, BACKWARDS, and the low battery light came on. I guessing that did it. I have done something like that before, and seen the low-batt light come on.
The only other mistake I make 1/2 often, it being on Ohms still , and probing a low voltage, usually under 12VDC. I hardly ever work over 20V, and hardly ever on mains AC stuff.
So yup, AC reading is stuck at 1.41V and 999Hz, with the probes attached. W/O them, it's at 0.0043Vrms and 0.000Hz
the VFD reads 0.43V, 0.000Hz
on DC+AC, I just get the 1.406V as the AC part, and no DC from the DC offset on my AWG
on DC dial, a sqr wave with any duty cycle, reads 0V, so it's not being averaged or anything, pretty sure it used to average stuff like that.
mVDC-999.99Hz/ stuck at 1.48mVDC and 30.83% dutycyc
mVAC- 999.99Hz/ voltage OL at even 9mVpp
Diode/cap-works
ohms/buzzer-works
Pure DC on DC dial works fine, but it won't average any AC
This only happened in the last 2-3 days, and I only noticed 1st thing today. As I know, it was fine before, I momentarily connected just under 1VDC, BACKWARDS, and the low battery light came on. I don't remember that last time I can say for sure the AC or Hz reading was working.......but the Hz reading on this always were easily fooled, so I rarely used it . But it never was pegged at 999.99Hz, and since the 60Hz reading stil shows up when the probes are not connected to anything, I never noticed until today.
This is terrible, I hope it's an external part that needs fixing, and not some impossible to find chip or processor. Any tip's on taking it apart to look around ? It was new from an ebay seller a few years ago, so I highly doubt there's any applicable warranty
And it's doing it on the main VAC setting, both displays (there's a dual display), and on the various mVDC and mVAC dial settings, same thing 999.99Hz, stuck at basically root2 volts, and stuck at 30.85% duty cycle, regardless of input.
The only mistake I made lately, (that I'm aware of) was on mVDC range, I momentarily connected just under 1VDC, BACKWARDS, and the low battery light came on. I guessing that did it. I have done something like that before, and seen the low-batt light come on.
The only other mistake I make 1/2 often, it being on Ohms still , and probing a low voltage, usually under 12VDC. I hardly ever work over 20V, and hardly ever on mains AC stuff.
So yup, AC reading is stuck at 1.41V and 999Hz, with the probes attached. W/O them, it's at 0.0043Vrms and 0.000Hz
the VFD reads 0.43V, 0.000Hz
on DC+AC, I just get the 1.406V as the AC part, and no DC from the DC offset on my AWG
on DC dial, a sqr wave with any duty cycle, reads 0V, so it's not being averaged or anything, pretty sure it used to average stuff like that.
mVDC-999.99Hz/ stuck at 1.48mVDC and 30.83% dutycyc
mVAC- 999.99Hz/ voltage OL at even 9mVpp
Diode/cap-works
ohms/buzzer-works
Pure DC on DC dial works fine, but it won't average any AC
This only happened in the last 2-3 days, and I only noticed 1st thing today. As I know, it was fine before, I momentarily connected just under 1VDC, BACKWARDS, and the low battery light came on. I don't remember that last time I can say for sure the AC or Hz reading was working.......but the Hz reading on this always were easily fooled, so I rarely used it . But it never was pegged at 999.99Hz, and since the 60Hz reading stil shows up when the probes are not connected to anything, I never noticed until today.
This is terrible, I hope it's an external part that needs fixing, and not some impossible to find chip or processor. Any tip's on taking it apart to look around ? It was new from an ebay seller a few years ago, so I highly doubt there's any applicable warranty
Last edited: