12E5119 Instruction Manual QuickTOC
®
ultra
IECEx 249
LAR | PROCESS ANALYSERS AG
10 Minor disruptions - quickly solved
10 Minor disruptions - quickly solved
10.1 Preconditions for Fault-Free Measurement Mode
If disruptions of your analyser occur during measurement mode and the causes are not entirely obvious,
please check the following:
1. Ambient conditions
The ambient temperature must be within the range permitted. The relative humidity should be below 80%
(not condensing).
2. Chemicals used
It is advisable to renew all chemicals and calibration standards when you notice that readings or
reproducibility are/is being severely impacted. Contamination of phosphoric acid, hydrochloric acid,
rinsing water and calibration standards can severely impact measurement results and reproducibility. To
prevent gas from forming in the injection system, it is important to acidify the rinsing water of the needle
to pH3.
3. Configuration of the Software
If there are questions about the configuration, note the system parameters and please contact your
local partner or the Technical Support of LAR (Chapter 15 on page 283). A USB stick may be used
to store screenshots generated with the Screenshot button (which show system parameters for
example).
4. Autostart in Case of a Power Cut
After a power outage, the analyser automatically performs an Autostart. If the analyser was performing
a measurement at the time of the power outage, the analyser continues the measurement. The Autostart
can be prevented by pressing the red “Offline” button. If the temperature of the furnace drops so much
during a power outage that it is no longer within the temperature tolerance, the furnace is, after the
Autostart, first heated until it has reached its target temperature. Only then the measurement will be
continued.
5. Storage of the Analyser in Dry Conditions which are protected from Frost
The analyser must be stored under dry conditions, protected from frost. The period of storage should not
exceed 6 months.
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