SP88/SP98 Spectrophotometer Operating Manual ... - X-Rite

4.3 Reference EntryThe SP88/SP98 can display the difference between a reference and asample. In order to display these differences the reference must first beentered into memory. There are 200 locations to store references.Measured references are stored spectrally and the tristimulus values arerecalculated each time a different illuminant/observer is selected. Manuallyentered references are stored only in the selected color space and illum/obs.The instrument can be set to operate in ‘‘automatic reference enabled ’’mode. In this mode, the unit will automatically select the closestreference during a measurement. In ‘‘auto reference disabled ’’ mode, theoperator has to manually select the reference location before ameasurement. Once you have selected a reference manually, thatreference will be used until a different reference is selected.Refer to Setting Operation Options Section 7.2 for manual and autoreference selection.To measure a reference:1) Select desired color space andilluminant/observer.2) Press [dif] key #4 to display colordifference.3) Press the [ref#] key #4 to enterreference selection menu.4) Press [↓] key #2 or [↑] key #3 toselect reference location. Afterselection, press [edit] key #4 to enterreference entry menu.- ‘‘MEASURE REFERENCE SAMPLE ’’ isdisplayed.- Continue with Step 5 to manuallyenter reference values. Advance toStep 6 to measure a reference.4-3L* 95.73 INCLUDEDa* -.60b* +1.26menu L*a*b* D65 10 difKey#1 Key#2 Key#3 Key#4L* -.09 INCLUDEDa* -.27b* +.60 E .66menu L*a*b* D65 10 ref01Key#1 Key#2 Key#3 Key#4L* 95.82a* -.33b* +.66exit ref01editKey#1 Key#2 Key#3 Key#4DecrementIncrementMEASUREREFERENCE SAMPLE➩