Maintenance/Safety Issues

Maintaining proper sensor temperature will prevent the premature failure of the sensor.  The operating temperature of the sensor should remain below 130° F (54°C) at all times.  To determine the sensor temperature, measure the voltage between pins 5(+) and 9(-) on the microprocessor board.  The voltage will be between 0 and 1VDC.  Use the chart in Appendix A to determine the temperature in °F, or use Appendix B to determine the temperature in °C.  If this temperature shows in excess of 130°F (54°C), the length of sample tubing should be increased to allow for adequate cooling of the sample before it passes the sensor tip.