Metrohm 774 Oven Sample Processor - Manual (Page 154)

6 Appendix
774 Oven Sample Processor, Instructions for use 148
• If necessary, press <Ð> several times until
diagnosis
>external bus test
• <ENTER>
The test searches for all devices connected to the E-Bus interface. The term "devices" means:
Tower 1
Dosimat interface (optional, max. 3 ea.)
If no error occurs, an identification must be shown on the display for each device connected to
the E-Bus. You can scroll through the list of identifications found with key <ENTER>. The follow-
ing table shows what identifications must be displayed for what configurations.
Configuration Identification on the display
Tower 1
address 0x86 type 3
Dos 1 - 4 (729 / address 1)
address 0x91 type 3
address 0x92 type 3
Dos 5 - 8 (729 / address 2)
address 0xA1 type 3
address 0xA2 type 3
Dos 9 - 12 (729 / address 3)
address 0xB1 type 3
address 0xB2 type 3
>external bus test
address 0x86 type 3
• Press <ENTER> several times and compare the display with the above
list until
>diagnosis
>beeper test
6.4.9 Beeper
• Prepare the unit for diagnosis (see Chap. 6.4.2).
• If necessary, press <Ð> several times until
diagnosis
>beeper test
• <ENTER>
The beeper is switched on and back off again as an endless loop.
>beeper test
• You can quit the test by pressing <QUIT> or <STOP>.
6.4.10 Rack code recognition
This diagnosis step allows you to check the sensors for automatic recogni-
tion of the fitted rack for operability.
• Note down the coding (magnets) on the underside of the racks for all
racks used for the test. The magnet fixture on the underside of the rack
is shown in the diagram below.