Thermo Scientific Dionex UltiMate 3000 Series Operating Instructions Manual page 67

UltiMate 3000 Series:
NCS-3500RS and NCP-3200RS
♦ Conventional fitting connections (non-Viper)
Do not over-tighten these fitting connections. If you observe leakage on the
connection, tighten a little further.
If leakage still exists, clean the connection port with a cleaning swab (part
no. 6040.0006). If this does not eliminate the problem, replace the capillary and/or
fitting.
To avoid increased dead volume or damage to the system and leakage, reuse fittings
and ferrules only for the same capillary connection.
Operating Instructions Page 59