5
Functional description
Page 30
gas-lab
Q1
Important: After the commissioning has been completed, operate
the
gas-net
Q1 evaluation computer only with the calibration
switch being closed. The calibration switch (the rotary switch on
the front of the device) can be sealed for safety reasons. A closed
calibration switch ensures that actions to be performed by trained
and qualified staff, such as calibrating actions etc., cannot be
started from the device.
5.1.1 Display and operation
5.1.1.1
Main display
Gas quality
The
gas-lab
system measures continuously during normal operation and
constantly calculates actual values for the target variables gross calorific value
GCV, standard density Rho
n
and CO
2
content of the measured gas.
The basic display of the
gas-net
Q1 evaluation computer supplies a survey of
the measurement status and currently calculated values of the gas analysis.
The first two lines show the pending gas quality measurement error with the
highest priority level on the left as well as time and date on the right.
The last three lines of the basic display indicate the current gas analysis
values GCV, Rho
n
, and CO
2
, written in large numbers.
The values shown in the basic display are only current and valid if the
system operates normally in undisturbed conditions. This means that the
measurement is not in the alarm status and a calibration is not carried out.
Indication of the error with
the highest priority level
Time and date
Final values for
GCV
– gross calorific value,
standard density,
CO
2
concentration