Abstract: A scanning unit of a position measuring arrangement for scanning a measuring graduation of a scale. The scanning unit includes a base body including an interior space; wherein the base body can be installed, fixed in place, on an object to be measured, wherein the base body comes into contact with a first contact face at a first location of the object to be measured. The scanning unit includes a heat-generating electrical component in the interior and a contact element with a second contact face which, in the course of installing the base body, enters into contact at a second location of the object to be measured. The scanning unit further including a heat-conducting element, which is designed for transferring heat generated by an electrical component from the interior space to the contact element.

Abstract: A mounting aid for the alignment of a first graduation support in relation to a second graduation support of a position measuring system, the mounting aid including a spacer, which specifies a preset scanning distance between a first measuring graduation of the first graduation support and a second measuring graduation of the second graduation support. The mounting aid further including a connector having a structure to positively engage the first graduation support, wherein the connector is released from engagement with the first graduation support by displacing the connector with respect to the first graduation support and a protective cover that covers the measuring graduation.

Abstract: A position measuring device having a scanning device and a scale, wherein the scanning device is movable in relation to the scale in a measuring direction. The scale including a measuring graduation, wherein periodic measuring signals are generated when the scanning device scans the measuring graduation and a reference marking, wherein a reference marking signal is generated when the scanning device scans the reference marking with a scanning beam bundle. The scale further includes a first optically scannable area marking next to the reference marking and a second optically scannable area marking next to the reference marking and which has a different optical deflection property than the first optically scannable area marking, wherein photoelectric scanning of the first and second optically scannable area markings with the scanning beam bundle from the scanning device generates an area signal that differentiates characteristics of the first and second optically scannable area markings.