When saving to ASCII, default is six decimal places (after the ".").
If you save in binary, full precision is retained based on your data type......
What version of LV are you using?
I believe you can use the "Array to spreadsheet string" function to define your decimal places in ASCII, but if you can save binary, it's probably best.
Shane
Using LV 6.1 and 8.2.1 on W2k (SP4) and WXP (SP2)