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Author Topic: 121gw DC volts scale input impedance?  (Read 1339 times)

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Offline innkeeperTopic starter

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121gw DC volts scale input impedance?
« on: May 16, 2023, 12:13:32 pm »
121gw DC volts scale input impedance?
i am sure its documented someplace but darned if i can find it
anyone knows the specs or can point me to the right place to read it.
thanks
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Offline BILLPOD

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Re: 121gw DC volts scale input impedance?
« Reply #1 on: May 16, 2023, 06:22:00 pm »
Good Morning Innkeeper,   I just now measured the DC input resistance of my 121GW using my Brymen 869S and I got 11.096 Mohm. :-DMM
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Offline thm_w

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Re: 121gw DC volts scale input impedance?
« Reply #2 on: May 16, 2023, 10:15:19 pm »
Its not in the manual that I can see.

lygte has measured and matches with Bills measurement above:
Quote
- Input impedance is 10-11Mohm on DC and 10Mohm on AC, AC+DC will switch between the two.
- mV DC/AC has 10Mohm input impedance up to about 2V, then it drops to a two kOhm
- Frequency input is a few Mohm up to 2 volt then it drops to 2kohm

https://lygte-info.dk/review/DMMEEVBlog%20121GW%20UK.html
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