Download Helijet Manual - Agilent Technologies

OPERATING INSTRUCTIONS
6.6.
Operating Procedures
6.6.1.
Assembling the Transfer Tube
Use this procedure to assemble the transfer and also if:
you have problems running the system
you need to check and adjust the lock nut on a transfer tube that has been supplied as part of a system
the transfer tube has to be adjusted to fit a different Helijet.
Equipment required:
15/16” or 24mm spanner
The nut and lock nuts are used to compress a collet, so that the assembly is firmly fixed to the transfer tube
arm. The components are labelled in Figure 25.
1.
Hold the nut and loosen the lock nut using two spanners so that the assembly can slide freely along the
transfer tube delivery arm.
2.
Push the transfer tube delivery arm fully into the Helijet side arm, so that the PTFE seal meets the mating
surface inside the side arm. (Push the transfer tube in as far as it will go.)
3.
Screw the knurled nut fully onto the thread on the entry arm, and then unscrew it by three turns.
4.
Gently push the transfer tube delivery arm into the side arm to make sure that the PTFE seal is seating
while you tighten the lock nut onto the transfer tube again.
Figure 25 Transfer Tube Lock Nut
Once the transfer tube lock nut has been set in place, check it periodically to ensure that the locking collet has
not moved due to the collet slipping on the transfer tube or over tightening on the knurled nut.
Ensure that all electrical connections are made as described in Figure 22 and that the power is on to both the
ITC and the GFC. Ensure that all PTFE tubes are connected in the correct order as described in the diagram
below except for the 10mm return line from the LLT.
Helijet
USER MANUAL
Version 3.9
Page 45