Loadstar Sensors DQ-4000 - Manual (Page 20)

DQ-4000 DQ-4000 User's Guide
Page: 20 / 21
P/N : 033-02061 Rev. 1
4.12 CS0 & CS1 (ID Strings) Commands
Function: Sets (or reports) the value of two user settable ID strings, S0 and S1
Summary: Two user settable strings are provided for each channel of the DQ-4000. At the
factory, CS0 is usually set to the Product Number of the load cell that is to be
used with each channel, and CS1 is set to a condensed version of the unit serial
number. The strings CS0 and CS1 may be 15 characters long.
Example CS0 MFD-050-200-A (sets the CS0 string to be MFD-050-200-A)
4.13 FIT Command
Function: Changes (or reports) the polynomial fit to be used for calibration
Summary: Either a quadratic or a cubic fit is used to calibrate the load cells. This command
allows you to choose the fit to be used. Typically, a cubic fit will give you better
accuracy in steady state conditions near room temperature (~25C) while a
quadratic fit had less sensitivity to changes in the calibration due to transient
temperature changes or other perturbations. The fit can be specified separately
for each channel.
Example FIT C (sets the fit to Cubic)
FIT Q (sets the fit to quadratic)
FIT (displays currently chosen fit)
4.14 CQA, CQB, CQC, TQA, TQB & TQC Commands
Function: Set (or report) quadratic fit parameters for selected channel
Summary: Use these commands to set or list the various parameters for a quadratic fit.
Typically, these values will be provided to you by Loadstar based on a factory
calibration. Also, typically the parameters for the compression side and the
tension side are the same (e.g., CQA and TQA will have identical values).
However, in some applications, these parameters may be different.
Example CQA 2.09876E-14 (sets the value of CQA to be 2.09876E-14
CQC (reports the value of CQC)