Metrohm 796 Titroprocessor - Manual (Page 269)

13. Appendix
796 Titroprocessor, Instructions for use 263 263
13.1.5 To check bar-code reader
With this diagnostic step the bar-code reader can be checked for functionality. For this test
a special test plug with article number 3.496.8570 is required.
1. Prepare instrument for diagnostic test (see chap. 13.1.2).
2. <Keybd. tests>
3. Without switching off the instrument plug in test plug 3.496.8570 to the socket
"Barcode".
4. <Barcode test>
Ä The test runs automatically. If a defect is found, an error message appears on the display, otherwise the previous
screen page appears.
5. Without switching off the instrument remove test plug 3.496.8570.
6. The test is quit by pressing <QUIT>.
13.1.6 To check the internal thermoprinter
With this diagnostic step the internal thermoprinter can be checked for its functionality.
1. Prepare instrument for diagnostic test (see chap. 13.1.2).
2. <Thermoprint.>
3. <St.dely pulse>
Ä The test runs automatically. If a defect is found, an error message appears on the display, otherwise the previous
screen page appears.
4. <Test print>
Ä A test printout is printed (see next page).
• Check that printout is complete and sharp.
• The character set (the first five lines) must agree with the sample.
• The topmost and lowermost dots of a line must be clearly printed; especially when verifying K and p.
• The printout must have a total length of 260 mm (tol.: ± 10 mm).
5. The test is quit by pressing <QUIT>.