Multimeter frequency response

Multi

While playing with a couple of high-end DMM's I started wondering how linear their frequency response was, they where all rated for at least 100kHz. With TestController and a ARB I could easily test it and also include a couple of bench and other meters.
I test from 50Hz to 500kHz with 1Vrms, the mV and next higher voltage range may not have the same frequency response. I would have liked to run a test at higher voltage also, but my ARB cannot deliver enough when loading it with 50ohm.



Contents
    Setup
    Results
        Benning MM 12
        Brymen BM525s
        Brymen BM829s
        Brymen BM869s
        Chauvin Arnoux CA5293
        Fluke 189
        Fluke 289
        Fluke 8846A
        Gossen Energy
        Gossen PM Prime
        Hioki DT4286
        Keithley DMM6500
        Keithley DM7510
        Keysight 34465A
        Keysight 34470A
        Keysight U1252A
        Keysight U1272A
        Keysight U1282A
        Kyoritsu KEW1062


Setup

In TestController I need the DMM for test and my ARB (Siglent SDG2122X), then I it is just configuring the ARB and use "Params Sweeper" to do the test:

DSC_4453

For the connection I use a coax cable with termination close to the DMM, this will give the most linear frequency signal.

ParamSweeper1

ParamSweeper2

ParamSweeper do a single sweep of the frequency generator with 300 points, this gives a fairly detailed curve and takes about 5 minutes for one curve. By filling out the log line on ParamSweeper I directly save the file and a chart. I have to configure the chart before the sweep is finished, i.e. define scale for the DMM and select frequency as X-axis. The chart will use the resolution from the configuration "Save images sizes" topmost slot. Most of this can be saved as a script and easily be performed for each test.

All test are done on the main AC range for the multimeter, i.e. not AC+DC.



Results



Benning MM 12

Benning%20MM12



Brymen BM525s

Brymen%20BM525s



Brymen BM829s

Brymen%20BM829s



Brymen BM869s

Brymen%20BM869s



Chauvin Arnoux CA5293

Chauvin%20Arnoux%20CA5293



Fluke 189

Fluke%20189



Fluke 289

Fluke%20289



Fluke 8846A

Fluke%208846A



Gossen Energy

Gossen%20Energy

Gossen%20VmV

Gossen%20Energy%20mV



Gossen PM Prime

Gossen%20PM%20Prime



Hioki DT4286

Hioki%20DT4286



Keithley DMM6500

Keithley%20DMM6500



Keithley DM7510

Keithley%20DMM7510



Keysight 34465A

Keysight%2034465A



Keysight 34470A

Keysight%2034470A



Keysight U1252A

Keysight%20U1252B



Keysight U1272A

Keysight%20U1272A



Keysight U1282A

Keysight%20U1282A



Kyoritsu KEW1062

Kyoritsu%20KEW1062



Conclusion

All meters works nicely up to 20kHz (i.e. audio range), but above there is a few percent deviations on some meters. I have not compared to specifications, but I would expect them to be well within.



Notes


I have not tested all my meters, only the ones I had close to my main test bench.