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| Keysight's new 34465A (6.5 digit) and 34470A (7.5 digit) bench multimeters |
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| dadler:
--- Quote from: 6thimage on March 24, 2015, 12:38:35 am --- --- Quote from: dadler on March 23, 2015, 10:55:16 pm ---But changing from DC to AC, at least on the 34465a, does not cause any relay click. --- End quote --- I have been told (in the last hour or so) otherwise - I'm not sure if the relay will click when the meter is in its stopped mode (i.e. not taking measurements), I think it probably would, but it might be a reason why you are not hearing it. --- End quote --- Ah you are indeed correct. I think because it's a singular click almost in concert with the button press that I psychologically filtered it out. I guess that's why all the clicky-clacky during AC+DC was jolting to me. |
| HighVoltage:
Today I tested how long the 34470A need after turn ON, before it reads stable The instrument was hooked up to a stable and warmed up 10V reference and then turned on. Lab temperature was about 21 to 22 °C Here are my screen shots: 34470A_after-04min.png Screen shot after 4 min of turn on 34470A_after-37min.png Screen shot after 37 min of turn on 34461A_Warm.png Proof, that the reference was pretty stable during the 37 min, shown here with the 34461A in parallel to the 34470A Only the 34461A was on for several hours already. It seems that the 34470A needs about 30 min to stabilize the readings and shows reliable numbers. |
| LA7SJA:
Have you done this test on your 34461A? And if so, do you care to share the result? Johan-Fredrik |
| DJ:
--- Quote from: HighVoltage on March 24, 2015, 05:27:25 pm ---Today I tested how long the 34470A need after turn ON, before it reads stable The instrument was hooked up to a stable and warmed up 10V reference and then turned on. Lab temperature was about 21 to 22 °C Here are my screen shots: 34470A_after-04min.png Screen shot after 4 min of turn on 34470A_after-37min.png Screen shot after 37 min of turn on 34461A_Warm.png Proof, that the reference was pretty stable during the 37 min, shown here with the 34461A in parallel to the 34470A Only the 34461A was on for several hours already. It seems that the 34470A needs about 30 min to stabilize the readings and shows reliable numbers. --- End quote --- That is an extremely useful post! It has talked me out of that extra digit, which was pretty much a "that would be neat!" thing. 6 1/2 should be plenty to see drift, things leaking, discharging etc. I owe you a beer! |
| HighVoltage:
--- Quote from: LA7SJA on March 24, 2015, 07:42:27 pm ---Have you done this test on your 34461A? And if so, do you care to share the result? Johan-Fredrik --- End quote --- Sure, here you go.... The 34461A was turned off over night. The 10V reference has been on for a few days now. It seems the 34461A is a little faster in getting stable and reliable readings |
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