Metrohm 757 VA Computrace - Manual (Page 63)

5 Technical data
757 VA Computrace – Hardware
59
Auxiliary electrode (AE)
Pt auxiliary electrode 6.0343.000 Platinum electrode
GC auxiliary electrode
(option)
6.1241.020 Electrode holder +
6.1247.000 Glassy carbon tip
Stirrer
Construction 6.1246.010 Drive shaft + screw-on
6.1204.090 Stirrer tip
Material PTFE
Rotational speed 200, 400, 600, ... , 3000 min
–1
Speed constancy ± 5 %
Measuring vessels
6.1415.210 standard measuring vessel made of glass;
working volume = 10 ... 90 mL
6.1415.150 measuring vessel made of glass (option);
working volume = 5 ... 70 mL
6.1418.220 measuring vessel made of glass with thermostat
jacket (option); working volume = 12 ... 70 mL
6.1450.210 measuring vessel made of PFA (option)
working volume = 10 ... 90 mL
6.1456.210 measuring vessel made of glass for sample changer
operation (option); working volume = 10 ... 90 mL
6.1457.210 measuring vessel made of glass with thermostat
jacket for sample changer operation (option);
working volume = 10 ... 90 mL
Dummy Cell
Use Checking the 757 VA Computrace Stand
Determination of the signal/noise ratio
Connections AE auxiliary electrode
RE reference electrode
WE-L working electrode linear mode
(RC element)
WE-D working electrode differential mode
(peak/wave)
Inert gas (in general nitrogen N
2
)
Use Operation of MME deaeration of sample solution
Required pressure p = 1 ± 0.2 bar (this gas pressure results in a gas
flow rate of ca. 20 L/h)
Connection of Dosimats (Remote interface)
Type 665 or 765 Dosimat
Number 1...5
Plug D-Sub with 25 pins
Manual operation Dispensing, filling, adjustment of feed and filling rate