Metrohm 797 VA Computrace - Manual (Page 22)

2 Installation
797 VA Computrace / Hardware-Manual 8.797.8001EN
14
Fig. 5: Connection to PC
In case your computer does not start if the 797 VA Computrace stand
is switched on, it might is due to an older version of the BIOS. These
BIOS versions are not able to handle USB Hubs in a correct way.
In that case, start the computer first, and switch on 797 VA Com-
putrace stand as soon as Windows booting is finished.
2.2.4 Equipping the measuring head
The fixtures inserted in the openings and connections of the measuring head 24 in
the 797 VA Computrace Stand depend on the working electrode selected (MME or
RDE) (see Fig. 6). The fully equipped measuring head for operation with a Multi-Mode
Electrode is illustrated in section 1.2 (Fig. 3 und Fig. 4), that for operation with a ro-
tating disk electrode in section 2.4 (Fig. 12).
When equipping the measuring head for the first time, the best procedure is as fol-
lows:
1 Preparations
• Prepare Multi-Mode Electrode MME 21 (details, see section 2.3) or rotating
disk electrode RDE (details, see section 2.4) for operation.
• Prepare reference electrode 26 (details, see section 2.5.2) for operation.
• Tilt back cover 2 of measuring head arm.
2 Insert dummy stoppers
• Screw dummy stopper 45 (6.1446.040) into opening 55.
• Screw dummy stopper 44 (6.1446.040) into opening 56.
797
6.2151.020 USB Cable
PC