Metrohm 719 S Titrino - Manual (Page 117)

4.2. Diagnosis
719 S Titrino 113
I/O-test-connector?
• Insert the 3.496.8510 test plug in port B 'Remote'. (Do not switch off instrument!)
• Press <ENTER>.
Test sequence:
1. In case of an error an error message is displayed. If for example no test plug is con-
nected, error message error 50 01HEX appears).
2. If no error is found, after about 1 s display shows
extern input/output o.k.
• Remove test plug.
• Press <CLEAR>.
diagnose press key 0...9
9 RS 232 test
A 3.496.8480 test plug normally used in the repair service is required for this test. However, this plug can also be
purchased by customers under the above number.
For the sake of completeness, the procedure is described here. If a diagnostic test of the RS 232 interface is not re-
quired, continue with point 10.
Fig. 4 Connections in the 3.496.8480 plug
• Press <5>.
RS232 test
• Press <ENTER>.
TxD
RxD
DCD
DTR
DSR
RTS
CTS
2
3
8
20
6
4
5