6 Operating in CI Mode
CI Autotune
146 5977B Series MSD Operating Manual
Table 11 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 A 50 A 150 A 50 A 150 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 Yes