Thermo Scientific FOCUS GC Instruction Manual page 77

Detector Gas Regulation
Verify that the corresponding gases flows are correct. If not adjust the value
turning the relevant regulation screw as shown in Figure 3-2.
The flow is measured at the exit of the detector. Enter the TCD detector control
menu to turn the flow on/off.
Instruction Manual
Gas
Helium (make-up gas)
Helium (reference gas)
1 turn clockwise of the regulation screw increases the flow of about 2.5 mL/min
1 turn counterclockwise of the regulation screw decreases the flow of about 2.5 mL/min
Figure 3-2. TCD Detector Gases Flow Regulation
Flow
27 mL/min
30 mL/min
Make-up
OPEN
Ref.
TCD Detector
Chapter 3
Gas Control
77