Operation; Figure 4-1: Power And Output Connections To The Model 2750 - Teledyne 2750 Operating Instructions Manual

Setup and Operation

Figure 4-1: Power and Output Connections to the Model 2750

The thermal conductivity sensor relies on a precise heat load to
produce an accurate thermally compensated output signal. The sensor
must be allowed to heat up and equilibrate before using the instrument
for analysis. Generally, warm up time takes about 15-20 minutes before
the heater lamp begins to cycle indicating it is at the operation
temperature.
The instrument is now ready to be used for analysis.

4.2 Operation

1. After configuring the instrument according to the procedures
specified in the previous section, engage the sample stream at the
regulator.
Note: Always have the sample flow control valve on the
instrument closed when engaging the sample stream. This
will avoid any high velocity sample transients accidentally
directed through the analyzer that could possible damage
the sensor. Flow rates above 2.5 SCFH can damage the
sensor.
Teledyne Analytical Instruments
Model 2750
32