Leak - Agilent Technologies 1260 Infinity User Manual

7
Error Information
General Error Messages

Leak

A leak was detected in the detector.
The signals from the two temperature sensors (leak sensor and
board-mounted temperature-compensation sensor) are used by the leak
algorithm to determine whether a leak is present. When a leak occurs, the leak
sensor is cooled by the solvent. This changes the resistance of the leak sensor
which is sensed by the leak-sensor circuit on the FLM board.
Probable cause
1
2
3
4
134
Loose fittings.
Broken capillary.
Leaking flow cell.
Detector leak error may be caused by the
Agilent sampler. In each sampler injection
sequence, step# 2 ejects the mobile phase
stored in the metering head during the
previous injection. This mobile phase is
ejected through the short plastic tube
connected to port# 4 of the sampler
switching valve. The output of port# 4 is
integrated into the sampler's contingency
leak drain system, which eventually
terminates in the leak pan of the bottom
module of the stack - the detector. With
normal injection volumes and run times, the
output of port# 4 is small, and evaporates
right in the sampler leak pan. However, the
output of port# 4 is significant, and a
substantial volume of ejected mobile phase
reaches the detector leak pan.
Suggested actions
Ensure all fittings are tight.
Exchange defective capillaries.
Exchange flow cell.
There are two possible fixes. Select the one
which is most convenient: 1. The waste drain
plumbing orientation, shown in
Connections to the Module"
eliminates the possibility of any leak drainage
from above reaching the detector leak pan. 2.
The leak drain for the detector can be connected
to the detector's leak drain fitting, and taken to
waste separately. If it is desired that the system
has only one leak drain tube, then it's possible
in increase the length of the small plastic tube
which is connected to port# 4 of the sampler
switching valve. This tube can then be taken to
waste separately. The tube which normally
serves as the detector cell outlet tube can be
used for this purpose.
Agilent 1260 FLD User Manual
"Flow
on page 64,