968 Spectrophotometer Operation Manual ***discontinued ... - X-Rite

2. Positioning TechniquesThe variety of items that the 948 and 968 can measure is almost endless.However, in order to obtain accurate and repeatable measurements, the bottom ofthe shoe must be:• Parallel with the surface to be measured if the surface is flat.• Tangent to the surface to be measured if the surface is curved.The reason for this is that any movement during measurement can cause thereading to vary. To obtain the most accurate and repeatable measurements, there area few guide rules you can follow.If the item to be measured is smaller than the shoe, you may want to make aplatform (the same height of the item) for the instrument to sit on. If the item tomeasure is curved, you may want to make a jig for the item to rest in.Shown below and on the next page are some examples of methods used toaccomplish this. Example 1 shows a platform for measuring a paint chip. Example2 shows a jig being used to measure a cup. Example 3 shows a jig being used formeasuring a small knob.Note: A mounting fixture (jig) is available from X-Rite (P/N 968-80). The jig canmeasure objects that are a maximum of 4" inches in width, or 2" to the center of theobject. Refer to Appendix A-4 for further information about this mounting fixture.Example 1- Measuring a Paint ChipCORRECTPaint ChipPlatformINCORRECT5