Principles of Operation
Heated Sample Line
5
1
Principles of Operation
Maintaining a steady temperature around 250°F is important so that moisture,
acid gas, and other constituents of the gas stream do not condense within the
sample lines. This can result in the damage of equipment as well as the loss of
important data. The Heated Sample Line helps to ensure the accuracy of gas
samples by providing a heated route for the gas in order to help prevent
scrubbing.
1.3 Lengths, Voltages, Watts
Part Number
Voltage
Watts
Length
0723-10
120
300
10
0723-25
120
750
25
0723-50
120
1500
50
0723-100
120
2500
100
0723-100HD*
120
3000
100
*
NOTE:
The HD model is manufactured to operate at a temperature of 400
degrees Fahrenheit.
2.2 System Components
The Heated Sample Line consists of a Teflon sample line (which can also be
ordered as stainless steel), a smaller Teflon calibration gas line, a power cord,
and two type K thermocouples
(3)
located 1/3 of the way from each end. The
second thermocouple is a spare in case of breakage. The lines are heated by
coils throughout the length of the line (see
figure 2
). They are very durable as
well as flexible.
(3)
Type K
Thermocouple
Heating Coil
Figure 1
Figure 2