I have a Keysight U1731C LCR and a few Fluke 80 series 87 and 85, all my Flukes can measure resistors in circuit correctly, but my U1731C is unbelievably far off, like a thousandth of the value or even 1/40Kth of the value or something insane.
Example 39Kohm measuring 34.5Kohm on my Flukes and 1ohm on the Keysight. 680K measures exactly on the Fluke but its 460Ohm on the Keysight.
This is especially on higher wattage resistors 1W 7W 2W
I have some 1/4w resistors that I can test it on and these seem to test ok on both, and I have a 1W 0.33ohm that tests out of circuit.
I am not that well up with the LCR but the difference in behaviour I cant work out, is it the way it measures? AC vs DC and voltage, or is there an issue with the LCR? I would expect to see some what similar results? Anyone who knows what I have done wrong I would appreciate the advice, it just seems weird that the Flukes can all do it.
Thanks