Analog Output Electrometer

[Andutschi]

Hello,

I am working with an electrometer which  can resolve currents as low as 0.1fA

and measure as high as 20mA in 11 ranges.

With the analog output of the device (0V - 2V) i go to an analog input of the NI 6009. 

The output gives an analog output signal for each range seperatly.

(For example: 1.67 V can be 16.7 mA but also 16.7 nA)

How can I know in LabView in which range I am?

Thanks!

[Intaris]

Wait a second while I put on my magic clairvoiyant hat......

Oh darn, where did I put it.  Sorry, Can't help much further without it.

Maybe a model number of your electrometer might help while I continue looking for my magic hat?

[Andutschi]

It`s the programmable electrometer from Keithley.

Hope you can find your hat now...

Thanks!

[Intaris]

Haven't found my hat yet, but I haven't found THE electrometer from Keithley either, I've found SOME Electrometers, but It looks like I still need my hat to find out which one of them you are using....

[Andutschi]

Sorry I forgot the number.

MODEL 6512 Programmable electrometer from Keithley.

[Intaris · Accepted solution]

I think you have one of two options:

1) Use the IEEE-488 interface to read out the value instead

2) Fix the meter to a single signal range to allow a 1:1 assignment of the 2V output to a measurement value