KROHNE OPTISENS AAC 050 EN - Manual (Page 27)

Manual OPTISENS AAC 050
27 OPTISENS AAC 050
8.
Operation and maintenance
8.1 Maintenance of the device
The device does not require any maintenance. There is no need for readjustment. If you want to have the
device checked regularly, you are welcome to send it to KROHNE Water Solutions. Alternatively the device
can be checked on site by one of our engineers.
8.2 Display contrast
With devices in wall-mounting enclosures the display contrast can be adjusted to the actual light conditions
by means of a potentiometer. It is indicated in the connection diagram with the word „display“.
8.3 Exchange fuse
Devices in wall-mounting enclosures have an internal fuse which has to be replaced at need. You will find a
spare fuse fixed to the inside of the terminal cover. Information on the fuse can be found in the chapter
„Technical data“.
To exchange the fuse, open the front carefully. The fuse is located on the right hand side. It is kept in place
by a Bayonet lock. Turn the lock to the left until the fuse pops up. Exchange it and fix the new fuse by turning
the lock to the right. Put the front back on and fix it tightly.
WARNING
Disconnect the power supply before opening the device!
ATTENTION
Mind that the cable connections to the front are not damaged, broken or torn during the process!
8.4 Cleaning
The front and the display should not get in touch with organic solutions such as methanol. Never let water
get inside the device. We suggest to simply use a damp cloth for cleaning.
8.5
Maintenance of the potentiostatic measurement
The metal surfaces of the electrodes must be cleaned regularly. Membrane sensors need a refill of
electrolyte regularly and an exchange of the membrane at needs. For all types of sensors the slope must be
determined regularly by calibration.
NOTE The instrument checks the sensor’s response characteristic after each calibration and displays an error
message if the sensor has to be cleaned or replaced. See chapter „Error messages“.
8.6 Disposal
For disposal please notice that the device contains electrolyte capacitors which have to be disposed
separately.