Multimeter problem in Multism

[uray27]

I have a hard time determining which settings shoud I tweak to change the measured range value in the multimeter.



As you can see in the image, I measured the current but the value is in 'micro amps (uA)', so my problem is, how do I force the measured value to be set in 'milli amps (mA)'? I mean I want to display it in mA not uA. How do I make it permanent? That it should measure in mA everytime? I hope you can help me. I am very beginner.

Another question is. How can I set a Beta or Alpha DC on a Transistor? Like, I am using this 2N3904, how do set a particular Beta DC on it? I really need help.

[_user32]

Uray27,

I believe the multimeter virtual instrument autoranges based on the input range seen (so I don't think you can set a specific scale).

One could create a custom Multisim VI to display as a fixed range... but why do you require fixed mV level precision only?

I believe some of these transistor values are adjustable, but it depends on the model - please search on the Multisim Component Reference guide (on ni.com) to see more detailed information on how the Multisim SPICE models are configured for standard parts such as BJTs.

Pat Noonan
National Instruments

[muxux]

I am also having the same question. So, how can make a custom multimeter? Thanks.

[_user32]

muxux,

LabVIEW is required to create custom meters, etc... for Multisim.   When you install Multisim there are some example VIs that you can start from.

Specifically to answer Uray27, here are 2 DC Meters (DC Voltmeter, DC Ammeter) that can be configured with fixed common units (such as mV or mA) and displayed with a given precision.  Optionally they can be set for autorange int the Volt or Amp scale to display the SI standard base units (which will vary depending on scale).

Here is an example for the ammeter set for mA...

The attached zip file contains the VIs and some example .ms12 files (Note: you must first place the VI Libraries (.llbs) in the folder location specified by "Options -> Global Preferences -> User LabVIEW instruments path" and then restart Multisim to load (prior to using them in a circuit).  

Regards,

Pat Noonan

National Instruments