Metrohm 894 Professional CVS - Manual (Page 85)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
6 Operation and maintenance
894 Professional CVS
￭￭￭￭￭￭￭￭ 75
3 Place the measuring head cover and the stopper (3-5) onto the mea-
suring head.
4 Start the determination and wait for the result.
If the curve meets the following conditions, then defects in the hard-
ware or the electrode cables can be ruled out:
￭ The curve must be linear.
￭ At –2.0 V, the current should be –1.67 mA ± 0.33 mA.
￭ At +2.0 V, the current should be +1.67 mA ± 0.33 mA.
Figure 47 Dummy cell test – Ideal curve progression
5 If the resulting curve is not consistent with this representation and
the problems with the determinations persist, contact the local
Metrohm Service.