04E3920 User Manual QuickTOC
®
purity
ATEX 2 95
7 How to Work With the Analyser
7.2 Configuration
LAR | PROCESS ANALYSERS AG
7.2.3.7 Injection time carrier gas
Here, the duration can be specified in which the device is to inject the carrier gas from the injection loop
into the oven. A zero-point measurement is performed.
7.2.4 Calibration
In user level 2 you can start a manual calibration.
Two screens provide calibration information:
• Perform calibration
- Carry out calibration
- Display details of the calibration
- Calibration graph
• Calibration results
A manual calibration should be performed if:
• the analyser is put into operation for the first time
• maintenance was done while the reactor filling was changed
• the reactor or the reactor filling were replaced
• the carrier gas flow was changed
• the injection volume was changed.
Before a calibration can be performed, the necessary calibration solution must be provided and the ne-
cessary settings made in the Run Calibration screen. The concentrations and the production of the ca-
libration standards (Chapter 6 from page 79). Depending on the selected measuring method, a mixed
standard or a single substance standard is used.
The Calibration Results screen displays the measurement results of the individual calibration points.
(Chapter 7.2.4.2 from page 98).
The calibration can be stopped at any time by clicking the "Offline" button
7.2.4.1 Perform Calibration
The calibration can be performed with both a water sample and test gas.
For gas calibration, the test gas must be connected. Test gas can be carbon dioxide and methane c in
appropriate concentrations. Unlike calibration with liquid samples, the injection loop for the measure-
ments during gas calibration is filled with test gas and which is then injected into the furnace. When using
methane, this is burned in the oven to carbon dioxide. The carbon dioxide is guided by means of carrier
gas to the detector and determines the signal surface. The injection parameters for the gas calibration
are set in the "Measurement parameters" screen under "Gas measurement".
Notice
In a manual calibration, the current carrier gas flow is stored as a setpoint. If the
volume flow after calibration has deviated by more than 5% over time, the error mes-
sage "E1835 Carrier gas flow is low" is displayed.
If this error message occurs, the tightness of the carrier gas flow must be re-estab-
lished (possibly a leak - leak repair).
Notice
The alayser will display on the calibration screens as many sample streams as are en-
abled. Please repeat the steps given for each sample stream.
i
i
To Next Page
Loading...