K-Patents DD-23 - Manual (Page 27)

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6.3 Diagnostic tools
In order to make troubleshooting easier, there are several built-in diagnostic tools.
An event log is built in the system. A short log showing last 6 events can be accessed
from the transmitter main display by pressing the soft key
DD23 . A more complete
event log can be found in the web-based remote interface (see Section 8.2.4).
Figure 6.1 Transmitter log page for instrument A
The remote interface also provides a diagnostic page which gives full information on
the system state (concentrations, relay state, switch state, indicator state), see Sec-
tion 8.2.3.
6.4 Troubleshooting
6.4.1 A question mark (?) on the refractometer display
Cause: The refractometer does not receive information request packets from the Di-
vert Control Unit. This may be caused by a faulty cable, faulty parameters, or equip-
ment malfunction either in the refractometer or in the Divert Control Unit.
Action: If the instrument has never been functional, or if it is possible someone has
changed the instrument parameters, there may be a con󰅮iguration problem with the
IP addresses. The IP address in the refractometer should be set as given in Section 5.4.
If possible, cross-check the addresses from the diagnostic web page.
A physical problem can be ruled out by looking at a small LED close to the transmitter’s
Ethernet connector. If the LED is green, the cable is ok. One way to isolate the problem
is to swap the cables between the refractometers. A standard Ethernet cable can be
used as a troubleshooting aid (either straight-through or cross-over).
6.4.2 A refractometer refuses to come on-line
Cause: Either there is no communication to the refractometer or there is a malfunc-
tion on the refractometer. It is also possible the transmitter is not con󰅮igured for Divert
use.