Agilent Technologies 5977B Series - Page 122

5 Operating in CI Mode 
122 5977B Series MSD Operating Manual
Table 1 0 Reagent gas settings
Reagent gas Methane Isobutane Ammonia EI
Ion polarity Positive Negative Positive Negative Positive Negative N/A
*
* N/A Not Available
Emission 150 A50 A
150 A 50 A150 A50 A 35 A
Electron energy 150 eV 150 eV 150 eV 150 eV 150 eV 150 eV 70 eV
Filament 1 1 1 111 1 or 2
Repeller 3 V 3 V 3 V 3 V 3 V 3 V 30 V
Ion focus 130 V 130 V 130 V 130 V 130 V 130 V 90 V
Entrance lens offset 20 V 20 V 20 V 20 V 20 V 20 V 25 V
EM volts 1200 1400 1200 1400 1200 1400 1300
Shutoff valve Open Open Open Open Open Open Closed
Gas select A A B BBB None
Suggested flow 20% 40% 20% 40% 20% 40% N/A
Source temp 250 °C 150 °C 250 °C 150 °C 250 °C 150 °C 230 °C
Quad temp 150 °C 150 °C 150 °C 150 °C 150 °C 150 °C 150 °C
Interface temp 280 °C 280 °C 280 °C 280 °C 280 °C 280 °C 280 °C
Autotune Yes Yes No Yes No Yes Ye s