Metrohm 799 GPT Titrino - Manual (Page 203)

4.2. Diagnosis
799 GPT Titrino 199
• Press .
diagnose press key 0...9
• Remove cable and resistor switch-box.
7 External inputs and outputs
This test is meaningful only if the 799 GDP Titrino is used interconnected with other instruments via the 'Remote' con-
nection. In addition, 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. 4 Connections in the 3.496.8550 test plug
• Press <4>
extern input/output test
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 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.