Metrohm 784 KFP Titrino - Manual (Page 108)

4.2 Diagnosis
784 KFP Titrino
105
7 External inputs and outputs
This test is meaningful only if the 784 KFP Titrino is used interconnected with other instruments via the 'Re-
mote' connection or if the 6.2148.000 remote box is used for connecting a PC keyboard or a barcode reader.If
the remote box should be tested, it has to be connected to the Titrino before the Titrino is switched on. In addi-
tion, a 3.496.8550 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 external inputs and
outputs is not required, continue with point 8.
5 18 4 17 3 16 1 2 6 7 8 13 19 20 12 24 11 23 10 22 9 21
Fig. 3 Connections in the 3.496.8550 test plug
• Press <4>.
extern i/o test 1...2
7.1 Test of the remote interface
• Press <1>.
extern input/output test
• Press .
I/O-test-connector?
• Insert the 3.496.8550 test plug in port B 'Remote'. (Do not switch off instrument!)
• Press .
Test sequence:
1. In case of an error an error message is displayed. If for example no test plug is
connected, 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 .
extern i/o test 1...2