Products > Test Equipment
Keysight's new 34465A (6.5 digit) and 34470A (7.5 digit) bench multimeters
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dmm2018:

--- Quote from: HKJ on January 17, 2019, 02:52:35 pm ---Is it a old firmware version, my meter looks different and I can select a HTML5 control that works. It do also have a Java applet, but it states that Java applets are not supported in Chrome.

--- End quote ---

Thank you HKJ.

Later when I tested with IE-11, it works !!!

Then checked the firmware version. Yes, it's an old firmware: A.02.06. I borrowed this unit from a friend.
HighVoltage:

--- Quote from: maxwell3e10 on January 17, 2019, 02:06:34 pm ---It maybe interesting to repeat this test on 100 NPLC setting. There are some data from OldNeurons on TiN's website that suggest that 34461A is better than 34465A/34470A on 100 mV scale and 100 NPLC.

--- End quote ---
OK, I will make another run at 100 NPLC of all 4 instruments
May be I will add a second 34461A

dmm2018:

--- Quote from: JDubU on January 17, 2019, 02:54:52 pm ---Some info on Java applets in Chrome:

https://www.java.com/en/download/faq/chrome.xml

--- End quote ---

Thank you JDubU.

Tried using Firefox version 64 >> Not Successful

Tried using IE version 11 >> Working
Dr. Frank:

--- Quote from: dmm2018 on January 17, 2019, 02:16:01 pm ---
--- Quote from: e61_phil on January 17, 2019, 01:43:50 pm ---25.41°C would be the internal temperature and not the lab temperature

--- End quote ---

Thank you e61_phil.

If 25.41°C is the internal temperature, I guess the lab temperature (ambient temperature) should be lower than 25.41°C.

I note that the temperature readings shown on the Cal menu of the meter keep changing (see below). If I adjust my room aircond temperature setting until the "Temperature change from last calibration" = 0°C, is it ok to guess/tell that the ambient temperature of my room is now equal (or very close to) to the ambient temperature of the Keysight Cal lab when the meter was calibrated at the Keysight Cal lab?


--- End quote ---

The 34465/470s internal temperature usually rises about 3°C above room temperature, therefore this instrument had been calibrated at about 22.5 °C.
In the cal certificate, they do not give the actual cal temperature, only a range around 23°C.

My instrument has 'date 23C' as a cal string, so I assume this to be the original room temperature (as the internal temperature is displayed on that specific screen in a different manner).

So you should set your R.T. accordingly but also use ACAL, to get best accuracy.

And your friend should update the firmware to the recent 3.0, as this old one still contains a lot of errors, and 3.0 adds the DIG option, and HTML5 operation of the browser.

Frank 
HighVoltage:
OK, repeated the histogram noise test again, this time on 5 instruments at the same time over night.
The temperature span was about 1.5 degrees.

I am not sure what happened to the 34465A this time.

All standard settings, 100 NPLC

1. Room temperature measurement with 5k thermistor on a 34461A
2. Noise 34461A #1    = 70 nV StdDev
3. Noise 34461A #2    = 90 nV StdDev
4. Noise 34470A #1    = 90 nV StdDev
5. Noise 34470A #2    = 150 nV StdDev
6. Noise 34465A #1    = 120 nV StdDev
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