User guide

3 - 6
PN 074-566-P1B
Composer Elite Operating Manual
3.3.2.2 Indicators Displayed On Screens
AT TEMP . . . . . . . . . . . . . . . . . . . . . Indicates that the temperature is within
±0.002°C of Temperature Setpoint 1 and
±0.005°C of Temperature Setpoint 2.
The text is displayed in green.
NEAR TEMP . . . . . . . . . . . . . . . . . . Indicates that the current temperature is near
the desired temperature for Temperature
Setpoint 1. The text is displayed in blue.
BELOW TEMP. . . . . . . . . . . . . . . . . Indicates that the current temperature is
below the desired temperature for
Temperature Setpoint 1. The text is
displayed in orange.
ABOVE TEMP . . . . . . . . . . . . . . . . . Indicates that the temperature is higher than
the desired temperature for Temperature
Setpoint 1. The text is displayed in red.
STEADY. . . . . . . . . . . . . . . . . . . . . . Indicates that the concentration for the last
seven measurements have an average error
less than 0.5 Hz and the drift is less than
twice the error. The text is displayed in green.
3.3.2.3 Overview Screen
Composer Elite will attempt to measure concentration and control Acoustic Sensor
temperatures to setpoints whenever it is powered up. It will give correct readings
when the pressure is within the specified range and correct values for the gases’
Molecular Weights and Specific Heat Ratios that have been entered (see Table B-1
on page B-1) and Factory Zero is used.
CAUTION
If a new Reference Zero is required, section 3.2.3, How to
Calibrate, on page 3-3 must be followed for establishing
Reference Zero with the correct pure calibration gas or
incorrect concentration values will be calculated.
The Overview screen displays each of the five available sensor channels,
displaying sensor Concentration (Conc) and Temperature 1 and 2 (Temp) for all
five sensors (see Figure 3-3). Unoccupied sensor slots are displayed in grey.
Temperature value will be displayed as 99.999 for cards that are installed with no
sensor attached.
Indicators (described above in section 3.3.2.2) display when appropriate.
Concentration is displayed in Mole%.