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Detection System Parameters ◗ Dynode Voltage: 15kV (fixed) ◗ Electron Multiplier: 2500 Volts max. Note: – Multiplier voltage is a calibrated parameter. – For best results, the multiplier should not be set manually. Troubleshooting: No peaks on Classic: Check multiplier voltage Switch dynode polarity Check for ions No peaks on Deca/Duo: Check Multiplier and Dynode Voltages. Noisy spectra with heated capillary capped off: Potential Dynode noise Clean Dynode Cup
Dynode Noise ◗ Dynode noise occurs over time. ◗ A noisy baseline with the heated capillary capped off is the symptom. ◗ This is due to an accumulation of material that can build up in the dynode cup over time. ◗ The cup should be cleaned when this occurs.
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