Metrohm 719 S Titrino - Manual (Page 116)

4.2. Diagnosis
719 S Titrino 112
dummy resistor 14.3kΩ ?
• Connect resistor switch-box (or suitable resistor 14.3 kΩ 0.1%) using 3.496.5070
cable to ‘Pol’ socket. Switch-box to 14.3 kΩ.
• Press <Enter>.
Test sequence:
1. An asterisk flashes during the test.
2. In case of an error an error message appears. (If for example the switch-box is not
connected, error 100 appears).
3. If no error is found, after about 15 s display shows
polarizer test o.k.
• Press <Clear>.
analog input test 1...5
• Press <Clear>.
diagnose press key 0...9
• Remove cable and resistor switch-box.
8 External inputs and outputs
This test is meaningful only if the 719 S Titrino is used interconnected with other instruments via the 'Remote' connec-
tion. In addition, a 3.496.8510 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 9.
PIN PIN PIN PIN
1  24 5  21
2  12 9  18
3  23 10  17
3  22 11  16
Fig. 3 Connections in the 3.496.8510 test plug
• Press <4>
extern input/output test
• Press <ENTER>.