PerkinElmer OilExpress 4, User Manual

Page: 44 / 152

44 . OilExpress 4 System User's Guide
Sample Shuttle
The sample shuttle (Figure 21) is used to move the flow cell in and out of the beam, enabling
the measurement of a background or a sample spectrum, as required. This automated
shuttle allows unattended background measurement, not only at the beginning of a batch,
but at user-defined intervals throughout the batch, compensating for changing environmental
conditions. The sample and the background positions in the shuttle both have a J-stop to
achieve 4 cm
−1
resolution.
NOTE: You can define how often the system will collect a background on the Batch Options
dialog. Refer to the topic
Batch Options
in the OilExpress 4 on-screen Help.
Figure 21 Sample Shuttle
The liquid presence sensor, used to detect the front of the sample fluid flowing into the flow
cell, is located on the sample shuttle. The sensor is connected to (and powered by) the fluid
control module (FCM). Refer to Liquid Presence Sensor on page 45.
The sample shuttle is powered via the Spectrum Two instrument. Refer to Connections on
the Spectrometer
on page 46.
Flow Cell
The two-port flow cell (Figure 22) is installed in the sample holder of the shuttle. The lower
port of the flow cell is connected to the injection station fill cup on the autosampler deck.
The upper port of the flow cell is connected to the waste container in the FCM. Sample or
cleaning fluid enters the flow cell at the lower port, and exits the flow cell at the upper port.
Flow cell
Liquid presence sensor
Sample holder
Background position
(with J-stop)
Sample compartment
connector
Power connector