KROHNE OPTISENS PAC 050 EN - Manual (Page 25)

Manual OPTISENS PAC 050
25 OPTISENS PAC 050
7.1 Current output
You can read out the measured value as 0/4…20 mA signals via the current output.
With the setting 4…20 mA the resolution is lower, but defective cable connections are immediately evident.
With the parameters Begin and End you define which part of the measuring range you want to read out.
Alternatively you can use the current output as steady-state controller output. In that case assign the current
output to controller S1 or S2, respectively.
7.2 Serial interface RS485 (option)
The devices are available with serial interface RS485 by means of which they can be integrated in a data
bus system. Via the interface, all settings, measured and control values as well as any error messages can
be read out digitally.
Devices with RS485 are automatically delivered with the leaflet „Information on the RS485“ which contains
instructions on the communication and a complete list of the functions available via interface.
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
WARNING
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.
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.