Calibration questio

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10 years 10 months ago #1019 by GNU
Calibration questio was created by GNU
After a successful firmware update (from 2.28 to 2.40) and calibration I wanted to check the scope manually and hooked it up to the nearest 120V outlet (I've got a BNC probe that's set to x10)
I flipped the manual switch for channel 1 to AC and switched to the Meter mode.
?
First time I hooked it up the sine wave looks correct but the voltage reading in the device said 30.56V??
Next time (rebooted device, re-installed xscope) the meter in the device wanders between -0.0050 to +0.7000.
When I hooked it up to the xscope software (V1.1 for OSX) the sine wave looks OK (it bleeds over into channel two a bit but not too bad). The meter function in the software showed nothing but 0.0000
When I hooked it up to the software during my second attempt the meter in xscope also wanders between -0.0050 to +0.7000.
The frequency counter works and every time and shows a solid 62.5Hz
Am I doing something wrong? This is a working wall outlet that I'm testing on with the x10 setting on the probe.
?

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10 years 10 months ago - 10 years 10 months ago #1020 by ganzziani
Replied by ganzziani on topic Re:Calibration questio
The device does not have an RMS measurement./\r\n/If you are measuring VDC, the device will show around zero volts (the average of the signal)./\r\n/If you are measuring VPP, the device will show around 31V. (110/10) * 1.414 * 2.
For increased accuracy on the frequency measurement, use the FFT with a max freq. of 320Hz. Turn on the automatic vertical cursors to show the peak frequency.
Last edit: 10 years 10 months ago by ganzziani.

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10 years 10 months ago #1021 by GNU
Replied by GNU on topic Re:Calibration questio
Thanks!

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