Metrohm 871 Advanced Bioscan - Manual (Page 38)

4 Notes - Maintenance - Faults
871 Advanced Bioscan / Instructions for Use 8.871.1003
30
4.5 Instrument test with the dummy cell
If any interference occurs whose source
cording or transfer you can selectively c
is suspected to lie in signal re-
heck the instrument electronics
ns a resistor (300 M Ω ) and a condenser (0.47
µF) connected in parallel. If a voltage of 0.8 V is applied in the DC mode
t t of 2.6 1%) is measured e condenser
f e ates l-
f ring
Please make the following settings in IC Net:
and the connection to the PC. This is done by connecting the
6.2813.030 Dummy Cell supplied. The temperature in the 871 Ad-
vanced Bioscan should be kept constant (30 °C) and, for optimal
shielding, the front door should be closed.
This dummy cell contai
hen a curren 7 nA ( ± at this cell. Th
unctions as a nois
unctioning measu
generator and simul
cell.
the capacitance of a wel
ings to record a ba ( Control / Startup hard
t maximum magn cation the noise shou ot exceed 0.05 n
If you use these sett
seline ware
(Measure baseline )) you should see a smooth signal line at 2.67 nA. Even
a ifi ld n A.