Metrohm 746 VA Trace Analyzer - Manual (Page 549)

7 Safety, Errors, Troubleshooting, Diagnosis, GLP
746 VA Trace Analyzer / 747 VA Stand
7-50
7.6.2 Prepare instrument for diagnostic test
1 Power off.
2 Disconnect all cables at rear panel, except mains cable and connecting cable
to VA Stand.
3 Power on.
7.6.3 Checking thermal printer
1 Prepare instrument for diagnostic test (see section 7.6.2).
2 <VA TRACE ANALYZER>
3 <Diagn.>
4 <Thermoprinter>
5 <Test print>
A test printout is outputted (see following page).
• Check printout for completeness and neatness.
• The character set (the first five lines) must match the specimen.
• The very top and very bottom points of a line must be printed clearly;
check K and p especially.
• The printout must have a total length of 260 mm (tolerance: ± 10 mm)
6 Press <ESC> several times until the ”MONITORING” page appears.