mru MGAprime, Руководство пользователя

Страница: 19 / 126

USER MANUAL
MGAprime
MRU GmbH, D-74172 Neckarsulm
19 / 126
3.11. Acid injection
The Acid Dosing Unit APE is optionally available.
CAUTION
Phosphoric acid (10 %)
Phosphoric acid (10 %) may cause burns.
►
If you come into contact with acid, wash the area imme-
diately using a lot of water.
►
Note the safety data sheet for phosphoric acid (10%).
Phosphoric acid (10 %) is injected into the analyser using the
Acid Dosing Unit APE
The injection of phosphoric acid (10 %) is necessary for a correct
measurement.
•
The injection guarantees constant conditions in the gas cooler, so
that you can measure dry or humid flue gas.
•
The use of phosphoric acid (10%) reduces losses of SO
2
, NO
2
on the
humid surfaces of the gas cooler.
Both effects increase measurement accuracy by preventing slow drift effects
caused by slowly forming or saturating moisture films.
Two pumps inject 24ml of phosphoric acid (10%) per hour during the
measurement.
A collecting bottle is included in the scope of delivery.
►
Please note that the volume of the supplied collecting bottle is sufficient
for two hours of measuring operation.

See also chapter Connecting Acid Dosing Unit APE, Page 61 to con-
nect the Acid Dosing Unit APE to the analyser.