AnsweredAssumed Answered

vrf Is COding problem or Instrument problem?

Question asked by VRFuser on Sep 8, 2006
I dowloaded a copy of the programming manual and I would guess by the fact that the meter only has what appears to only be Kohms the data you read has to be assumed to be Kohms. The manual does not give an example of the output in ohms function so I'm only guessing here but it does say it displays what the display shows.
 
Assuming only a Kohms function and not ohms or Megohms then whatever the number read back is automatically in Kohms. I know this is not the best answer but the manual is not all that clear in this aspect.
 
One expiremnet you can try is measure 50 ohms and see if you get an answer of 0.05 which would be the equvilent Kohms answer. If you do then all ohms readback data would have to be multiplied by 1000 to be in the proper Ohms value.
 
Good Luck
 
Greg
 

bf pang <fion_sp@hotmail.com> wrote:

If in the program have 2 Direct I/O, is it they can affect each other and
cannot get the expected result? In my case, i select 2 Direct I/O from
Instrument Manager. One is set resistance another one is used to set
current. Beside that, i have select 2 "start" object and link each "start"
object to Direct I/O (One-By-One).

Coding:
(Set Resistance)
WRITE TEXT ":CONFigure:RESistance 0" EOL
WRITE TEXT ":Read?" EOL
READ TEXT x REAL64

(Set Current)
WRITE TEXT ":CONFigure:CURRent:DC 0" EOL
WRITE TEXT ":Read?" EOL
READ TEXT x REAL64

**A = "Start" object link to Set Resistance Direct I/O
B = "Start" object link to Set Current Direct I/O

After i finish coding, i click A "Start" object , the result is "14.91".
After that, i click B "Start" object , the result same as the first Direct
I/O, which is "14.91". But if i click one more time B "start" object the
result will become "0". And then, i click again the A "start" object the
result is "0".i click again the A "start" object, the result become "14.91".

I need to click more than one time the "Start" object just can get the
actual result, can i know what is the problem? Is Instrument problem or
programming problem?

(Instrument model: GW Instek GDM-8246 Multimeter, GPIB Interface.)


Another problem is i cant get my expected result. For example, my expected
result is "14.91k", but the result i got is "14.91". Can i know why i cant
get "k"?

Coding:
WRITE TEXT ":CONFigure:RESistance 0" EOL
WRITE TEXT ":Read?" EOL
READ TEXT x REAL64


but if i add command "*RST" at the first line, the result will become
"14.91K", For example:
WRITE TEXT "*RST"
WRITE TEXT ":CONFigure:RESistance 0" EOL
WRITE TEXT ":Read?" EOL
READ TEXT x REAL64

Is it this command is correct?

Thanks.

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