Each cover plate is detected by a pair of proximity sensors that are located just behind the machine’s fixture and under the system’s cross-cooler slide plate.2419 The Spectrum’s control system will detect what cover plate is in and will display an alarm if the incorrect plate is installed (E103- 11: Gel Mode Cover Plate for Cross-Cooler not Detected and E103-12: Process Mode Cover Plate for Cross-Cooler not Detected).2420 The Spectrum will not allow the operator to run the machine without the correct cover plate installed.2421 Gel Mode Process Plate