Detector Systems
Flame photometric detector (FPD)
3.Under some operating conditions, it is important to continue to hold the ignitor switch in for several seconds after opening the hydrogen valve fully counterclockwise.
4.Under some operating conditions, the flame may be more easily lit with the rubber drip tube removed. After lighting the flame, reinstall the drip tube and FPD cover assembly.
5.Under some conditions, the flame may be more easily lit with the detector temperature raised to 200^C or higher (but do not exceed the detector’s maximum temperature of 300^C) and ignite the flame. After the flame is lit, set the detector to the required temperature.
6.If none of the above are sufficient to light the flame, try increasing the hydrogen supply pressure by
7.If the flame still won’t light after trying the preceding steps, there may be a large leak in the system. This can result in measured flow rates being significantly different from actual flow rates, resulting in nonideal ignition conditions. Thoroughly leak•checkthe whole system.
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