INFICON Composer Elite Gas Concentration Monitor User Manual

Page 53

3 - 13

Composer Elite Operating Manual

Allow user zero. . . . . . . . . . . . . . . . Is a user-defined reference zero allowed?

Default value is No.

Temperature Setpoint 1 . . . . . . . . . Sets the Acoustic Sensor’s resonant

chamber temperature (°C). Allowable range
is 30.0 to 65.0°C. Default is 40°C.

Temperature Setpoint 2 . . . . . . . . . Temperature setpoint (°C) of the inlet tube.

Allowable range is 30.0 to 68.0°C. Will
default to 3°C higher than Temperature
Setpoint 1 when Temperature Setpoint 1 is
updated.

Carrier MOL Weight . . . . . . . . . . . . Molecular weight of the lighter (or carrier)

gas. Allowable range is 1.000 - 1000.000.
Default is 28.01.

Carrier Gamma . . . . . . . . . . . . . . . . Specific heat ratio of the lighter (or carrier)

gas. Allowable range is 1.000 - 2.000.
Default is 1.400.

Precursor MOL Weight. . . . . . . . . . Molecular weight of the heavier (or

precursor) gas. Allowable range is 1.000 -
1000.000. Default is 159.93.

Precursor Gamma . . . . . . . . . . . . . Specific heat ratio of the heavier (or

precursor) gas. Allowable range is 1.000 -
2.000. Default is 1.076.

Sample Averaging Depth. . . . . . . . Number of frequency readings to be

averaged together. A value of 0 or 1 indicates
no averaging. Allowable range is 0 - 100.
Default is 0.

CAUTION

Set the Composer Elite Acoustic Sensor resonant
chamber temperature (Temperature Setpoint 1) 5°C
above process gas tubing temperature. This is to ensure
precursor gas does not condense inside the Acoustic
Sensor. However, if this temperature is too close to the
ambient temperature, it may be difficult to maintain
Temperature Setpoint 1. Setting higher values for
Temperature Setpoint 1 and 2 will remedy
this situation.