Setting Pressure And Flow Parameters; Ncs Determination; H-O Determinations - Thermo Scientific EA IsoLink IRMS System Operating Manual

Setting Pressure and Flow Parameters

The following tables report the pressure and flow parameters to set if the helium and oxygen flows are:
• Preset at the helium, and oxygen pressure regulators.
• Adjusted and controlled through the software by means of the EFC-t control.

NCS Determination

Table 18
Table 18. NCS Determination Pressure and Flow Parameters Setting
Parameters
Flow to set through Isodat Software Suite/EagerSmart Data Handling Software
Helium as carrier gas
Helium as reference gas
Oxygen

H-O Determinations

See Table 19
Table 19. O-H Determination Pressure and Flow Parameters Setting
Parameters
Flow to set through EagerSmart Data Handling Software/sodat Software Suite
Helium as carrier gas
Helium as reference gas
Oxygen
IMPORTANT For H-O Analysis only: From Isodat Software Suite open the Elemental Analyzer
Status page. Select Special Function then check Disable Oxygen Injection to ensure no oxygen
introduction into the carrier circuit. This is usually taken care of by Isodat Software Suite
automatically.
The color of the button turns red. Always remember to maintain a flow of minimum 10 mL/min
through the NCS Separation Column during H-O determination in order to avoid damage to the
separation column in heated condition. This is the case in particular for liquid injections when no
purge of the autosampler is required.
Thermo Scientific
details the pressure and flow parameters for NCS determinations.
details the pressure and flow parameters for H-O determinations.
3
Flow adjustment/control through
software by EFC-t control
180 mL/min (for pressure 280-300 kPa)
70 mL/min (for pressure 280-300 kPa)
250 mL/min (for pressure 250 kPa)
Flow adjustment/control through
software by EFC-t control
100 mL/min (for pressure 280-300 kPa)
100 mL/min (for pressure 280-300 kPa)
0 mL/min (for pressure 250 kPa)
EA IsoLink IRMS System for CNSOH Operating Manual
Installing Flash IRMS Elemental Analyzer
Setting Pressure and Flow Parameters
63