User guide

140 Advanced User Guide
6 Checking for Leaks
11
Scroll to the Constant duty cycle and enter 50. Wait 10 seconds.
12 Press [Front or Back Inlet]. Scroll to Pressure and press Off/No.
13 Quickly turn off the carrier gas supply at its source.
14 Monitor the pressure for 10 minutes. Use the timer by
pressing [Time] and [Enter].
A pressure drop of less than 1.0 psig (0.1 psi/min or less;
6.9 kPa or 0.69 kPa/min) is acceptable.
If the pressure drops much faster than the acceptable rate,
see “To Correct Leaks in the Cool On- Column Inlet”. Retest.
15 After the inlet passes the test, restore the GC to operating
condition.
• Remove any caps/plugs.
• Reinstall the column.
• Restore the correct column configuration.
• Load the operating method.