User guide

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PN 074-566-P1B
Composer Elite Operating Manual
3.2.2 Special Tools and Materials
Flowing a pure gas through the Acoustic Sensor at process pressure and flow rate
is required for calibration.
NOTE: For guaranteed safe operation, a calibrated high-performance mass
spectrometer leak detector should be used to check leak integrity
whenever the Acoustic Sensor has been removed and reinstalled.
3.2.3 How to Calibrate
1 In the Sensor Parameters pane, set ALLOW USER ZERO to YES.
2 Flow calibration gas, usually pure carrier gas, through the Acoustic Sensor at
normal operating pressure and flow rate.
3 Allow sufficient time for the calibration gas to cleanse any mixed gases out of
the Resonant Chamber. The carrier gas has displaced all of the formerly
contained gas mixes when the concentration stops changing.
4 STEADY and AT TEMP indicators will be displayed to indicate that the
concentration and cell temperature are stable.
5 Set the new Reference Zero value by
 On Composer Elite Multi-Sensor Software, click Zero Reference
 On the Composer Elite front panel, on the Sensor window, press Zero
Reference
6 The new Reference Zero is displayed on screens as User Zero.
3.2.4 How To Revert To Factory Default Settings
Factory Zero is re-established by changing any parameter value affecting
concentration measurement, such as Acoustic Sensor Setpoint 1 Temperature,
Specific Heat Ratio or Molecular Weight or by pressing Reset Reference on the
Composer Elite front panel on individual Sensor screens.
Composer Elite may be reset to the default parameters by holding 1 and 6 down
while powering up the instrument. Data Reset will be displayed on the Boot screen
if this is successful. Parameters Reset will be displayed on the Errors and
Warnings screen.