What is the precision used by DIAdem during the integration?

Hello

I have been using DIAdem to perform digital integrations of force with respect to displacement and pressure with regard to travel (all acquired signals). These calculations are needed to determine the actuation and energy output associated with a hydraulic jack. The problem is that I am impossible numbers (work more than to work in). I was wondering if it can be caused by an accumulation of data errors, as most of the integration of the intervals are about 5,000 points. Can someone tell me how accurately tiara made digital integration? The online help does not. I guess it's all 64-bit double precision, in which case the rounding error is unlikely to be serious, but I'm running out of explanations.

Any advice appreciated,

PorridgeMan.

Hi PorridgeMan,

All digital channel data values are imported into the tiara as slna (64 bits real) data portal, regardless of their original data types on the disk.  All routines analysis in tiara that create digital channels create SLNA, so all the digital channels in DIAdem are always slna and all numerical computations in DIAdem are always made with precision DBL.  It must be something else.  Would you care to send on your dataset and VBScript?

Brad Turpin

Tiara Product Support Engineer
National Instruments

Tags: NI Software

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