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Sorry to be a fuddyduddy, but the 260, with sensitivity of 20,000 ohms/volt, will impose a loading of 5 megohms when on the 250V scale (250X20,000=5 meg.).
The only time loading would be a problem with the 260 is in very high impedance circuitry.
In the old days meters typically had sensitivity of 1000 ohms/V, 5000 ohms/V. etc. Those could cause signifigant loading errors.
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