Adrian gave the answer but I think it was lost in the noise.
The 3456A 90 day accuracy on >10M range is only 1.8% _+? count. Even 24h is 1.3%
This is clearly not adequate to measure a 1% resistor even if the 3456A was recently calibrated.
You need a different meter to check a 90M 1% resistor.
Robert G8RPI.
