FLUKE 8846A How to setup conversion mV to Ampere for AC/DC Current Clamp

[Kiriakos GR]

HAPPY NEW YEAR  2026 

Best way to setup FLUKE 8846A for Pico technology TA189 AC / DC Current Clamp

Trusted measurement range 12mA ~ 30A.
By using mx+b Math Function.   

FLUKE 8846A / DMM 4050,  this comes with mx+b Math Function.
The problem begins when both FLUKE and Tektronix the second as source of DMM4050, they gave us poorly written user manuals. 

For setting M parameter other than numbers, we have to set correctly also the the multiplier
For setting B parameter other than numbers, we have to set correctly also the the multiplier

And here comes the undocumented part: 
M multiplier symbols:
u, m, (square box or _ ) , K, M

B multiplier symbols:
P, n, u, m, (square box or _ ), K, M, G

square box or _ When selecting a multiplier, DMM graphical User interface, this will present also an square box as an possible highlighted choice.
When this square box this is not highlighted ( stored choice ) then the user will see an underscore ( _ ) symbol.

Now the users with high intelligence, they should understand, that this is how the DMM will notify them,  that this is the setting for inactive multiplier   

[Kiriakos GR]

Next question, this is of what happens if you start tweaking M multiplier symbols?

At my 8846A, u and m multiplier, both steal away digits of display resolution.
While K and M they create an overflow in the quantity of digits. 

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Pico technology TA189 AC / DC Current Clamp, this is the best current clamp probe, at my current collection.
https://www.ittsb.eu/forum/index.php?topic=1778.0

I have repeatably confirm it measuring range, trusted measurement range 12mA ~ 30A. 
This is an excellent working range for 99% of electrical applications, by excluding Process control.

TA189 when this gets combined with the 8846A, they can do miracles as a team.
TA189 this is high bandwidth 100kHz probe at AC.
8846A this has a Maximum of 300kHz bandwidth at 10V range, while tight accuracy this is at 10 Hz – 20 kHz.

This combination it can measure from DC up to non sinusoidal AC RMS mA and Ampere.

The setup of 8846A at mx+b Math Function, this was rather easy.
As first we select manual 10V range (AC or DC).
MATH MENU.. 
At M value we set  +010.000000
multiplier symbol = INACTIVE = square box or underscore

Then we use MATH Enable

Then we can store this configuration, at 8846A by using Memory button and one of the available configuration store slots.
I have all ready one  mx+b Math configuration for DC fan RPM measurements.
Now added and a second  mx+b Math configuration, for my current probe DC Mode.
And a third, for my current probe AC Mode
8846A this has five slots of SAVE / RECAL Config.

Now I am finally able, not to just measure AC/DC current with my probe, but to also perform PC data-logging, and averaging calculation.
Due the TsDMMViewer Data Logger software. 
 
At my next article update, I will add few photographs too.