Metrohm 787 KF Titrino - Manual (Page 52)

3.3. Diagnosis
787 KF Titrino 48
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>.
RS232 test-connector?
• Insert the 3.496.8480 test plug in 'RS 232' port.
• 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 68 appears).
2. If no error is found, after about 5 s display shows
RS232 test o.k.
• Remove test plug.
• Press <Clear>.
diagnose press key 0...9
TxD
RxD
DCD
DTR
DSR
RTS
CTS
2
3
8
20
6
4
5