Features - Teledyne 275R Instruction Manual

Intr Intr oduction oduction
Intr Intr Introduction oduction oduction
In order to help you make maintenance purging of turbine generators
safer, Teledyne Analytical Instruments has developed the 275R Turbine
Generator Purge Gas Analyzer. During maintenance of hydrogen-cooled
turbine generators, the cooling gas (H
carbon dioxide (CO ) and then air. The 275R accurately measures H
2
concentrations during the replacement process by comparing the difference
in thermal conductivities between a sealed reference gas (helium) and the
atmosphere undergoing replacement.
Since air leaks reduce the purity of H
viscosity and reduces heat conduction, the 275R has a H
order to assist in monitoring H
efficiency during normal operations.
1.1 1.1

1.1 Features

1.1 1.1 Features Features Features Features
The Model 275R analyzer has three ranges for purge and normal
generator operation, with zero and span potentiometers for each. Each
range also has its own scale on the meter face. Efficient insulation around
the cell block enables quick restarts so that the instrument can be carried
from one generator to the next without a lengthy warm-up period.
Periodic calibration is all the maintenance necessary. Installation is just
a matter of connecting sample inlet and outlet lines. The reference cell is
sealed; thus, no other gas connections are necessary. Electronic tempera-
ture control in the cell block insures optimum accuracy in measurement.
TELEDYNE ANALYTICAL INSTRUMENTS
) is systematically replaced with
2
used in cooling, which increases
2
and impurity concentrations for optimum
2
Intr Intr Introduction 1.0 Intr Intr oduction 1.0 oduction 1.0 oduction 1.0 oduction 1.0
2
-in-air range in
2
1.1