KROHNE OPTISWITCH 6500 C EN - Manual (Page 20)

4
ELECTRICAL CONNECTIONS
20
OPTISWITCH 6500 C
www.krohne.com 01/2014 - 4000649104 - MA OPTISWITCH 6500 R04 en
If Teach-In for some reason do not succeed, the device will enter "Error State" and reload factory
settings automatically. This state is indicated by a blinking LED (3 short and 1 long blink). The
error can normally be fixed by powering off and on. Alternatively remake the "Teach-In"
procedure.
The factory settings can always be reloaded by connecting the terminal "Teach-In" to -VDC for
more then 6.5 seconds. The reloaded factory settings will be confirmed by pulsing light intensity
3 times.
CAUTION!
• Make sure that power is on before Teach-In.
• For best Teach-In it is important that the actual process conditions are simulated.
• During Teach-In mode the light intensity of the LED will decrease to protect your eyes.
INFORMATION!
Please observe that the OPTISWITCH 6500 C has been factory adjusted to measure liquids with
ε
r
> 2, such as oil.
In case the media has a lower ε
r
value (e.g. powder) either a Teach-In procedure must be carried
out for the media or alternatively a manual adjustment using the configuration tool can be done.
The adjustment must be made at the medias operating temperature to avoid faulty
measurements due to temperature drift.