Capacitance Free Length Gage Capacitance Free Length Driver The Capacitance Free Length Driver is a self contained system for driving the non-contact probe. The driver electronics produce an output voltage, which is proportional to the length of the spring at the probe. Longer springs (closer to the probe) produce more positive output voltages. The output voltage offset must be adjusted to near zero for a nominal length spring. Probe Zero adjustments can be made by a DAC output voltage from the users data acquisition system or by a ten-turn potentiometer that can be purchased with the system. The probe driver is mounted with two screws (M3-0.5). Do not loosen or remove the probe connector nut. See Figure 3 for panel cutout specifications. The maximum depth of the threaded mounting holes is 9.5mm (3/8 inch). M3-0.5 Mounting Configuration Capacitance Free Length Gage - To Order Part Number Capacitance Free Length Gage (PC interface not included) PC Interface 014-3000-0007-00 PC Analog Interface Card, PCI Bus 025-0000-0571-00 Capacitance Free Length Gage - Sample Code Driver 025-1000-0479-00 Capacitance Free Length Driver 025-1000-0429-00 Computer Cable Assembly 025-1000-0430-00 Zero POT Cable Assembly Probes 025-0000-0658-02 Heated Probe - PX595G (English) 025-0000-0658-03 Heated Probe - PX595G (Metric) Probe Tips 025-0000-0655-00 Extended Probe Tip - Kit (1 Base & 5 Tips) 018-0000-2535-00 Extended Probe Tip - 1/8 X 1 In, Threaded (3 x 25 mm) 018-0000-2531-00 Extended Probe Tip - 1/4 X 1 In, Threaded (6 x 25 mm) 018-0000-2532-00 Extended Probe Tip - 3/8 X 1 In, Threaded (9 x 25 mm) 018-0000-2533-00 Extended Probe Tip - 5/8 X 1 In, Threaded (16 x 25 mm) Capacitance Free Length Gage - Connections 018-0000-2534-00 Extended Probe Tip - 1 X 1 In, Threaded (25 x 25 mm) Wire Colors 025-0000-0654-00 Extended Probe Tip - Base Assembly, Threaded ±10 VDC, proportional to spring length, more positive = longer Zero Voltage In (Negative Voltage) 0 to -10 VDC input voltage used to zero output voltage offset. 0.1 V input change yields approximately 5V output change. <0.5 VDC normal operation, >0.5 VDC when probe tip is grounded by contact with spring or other object. Ground (Common) 025-0000-0597-01 Guarded Tip - 1.5 In. Dia. (38 mm) 025-0000-0597-02 Guarded Tip - 2.0 In. Dia. (52 mm) Probe Holders 025-0000-0640-00 PB309B - Fixed Probe Mount