Metrohm 857 Titrando - Manual (Page 29)

825 Lab Link, Instructions for Use 25
4.2 Troubleshooting
4.2.1 825 Server Software Status "not available"
If in the status line of the 825 Lab Link Server software (Connec-
tion status) the display for the corresponding connection does not
change to connected within the defined status test period after
the Touch Control has been switched on then check the following
points:
No power supply to 825 Lab Link
The 825 Lab Link is provided with power via MSB connection 7. A
correct power supply is indicated by green Power LED 4 being
permanently lit up.
Ethernet connection is interrupted
Ethernet connection 3 of the 825 Lab Link is not plugged in cor-
rectly (RJ45). The red Error LED 2 is blinking. If communication is
functioning then green status LED 5 blinks irregularly.
TCP/IP address of the 825 Lab Link incorrectly configured
Compare the TCP/IP address set in the 825 Lab Link Server with
the address of the 825 Lab Link. The latter can be easily checked
with a Telnet connection from the PC and altered if necessary
(see Section 4.1.1). If because of an unknown or incorrectly con-
figured TCP/IP address no Telnet connection can be set up to the
825 Lab Link, as described in Section 2.2, then the address must
be redefined.
Time for periodic status test set too high
If the 825 Lab Link Server list contains a large number of non-
existent connections then the ICMP timeout period must be in-
cluded when calculating the time (see rule-of-thumb equation in
periodic status test in Section 2.5.2). We recommend that unnec-
essary connections are deleted from the list.
825 Lab Link has an internal fault
A fault in the 825 Lab Link hardware is indicated by Error LED 5
being lit up red permanently.