Checking the opto interrupter, 4 checking the dc power supply board -14, Section 10.6.6 and 10.6.5 – Teledyne 300M User Manual
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Teledyne API Model 300M CO Analyzer Instruction Manual, 04033, Rev. A
10.6.6 Checking the Opto Interrupter
Correct operation of the Opto Interrupter on the gas filter wheel can be confirmed by connecting
an oscilloscope U6, Pin 11 on the Sync Demodulator board and comparing the waveform to
Figure 10-1. The waveform should be symmetrical and 5 Volts peak to peak.
Figure 10-1: Opto Pickup Waveform
Figure 10-2: Detector Waveform
10-16