Metrohm 800 Dosino - Manual (Page 40)

7.1 Problems ￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
32 ￭￭￭￭￭￭￭￭ 800 Dosino
7 Troubleshooting
7.1 Problems
Problem Cause Remedy
Data of the dosing
unit cannot be read. Data chip of the dosing
unit mechanically dam-
aged or impaired by chem-
icals. ￭ Remove the dosing drive and set it up
again.
￭ Clean the data chip and the contact surfa-
ces.
￭ Have the data chip replaced by the
Metrohm Service Dept.
Dosing unit recog-
nized either not at
all or incorrectly. The dosing drive was not
attached correctly. ￭ Remove the dosing drive and set it up
again.
￭ Check whether the dosing drive is correctly
seated.
￭ Switch the control instrument off and on
again.
￭ If necessary contact Metrohm Service Dept.
Dosino becomes hot Dosing drive is overloaded.
Valve disc or dosing piston
is blocked. ￭ Switch off the instrument immediately.
￭ Disassemble the dosing unit (see the man-
ual for the dosing unit) and clean all of the
individual parts. Replace defective parts.
Dosino cannot be
actuated by the con-
trol device. Connection between Dos-
ino and control device is
interrupted or án error has
occurred on the Dosino. ￭ Check the cable connections.
￭ Switch the control instrument off and on
again.
￭ Check the dosing and filling rate.
￭ If necessary contact Metrohm Service Dept.
No dosing takes
place at all Tubing connections are
blocked or dosing unit is
not assembled correctly. ￭ Check whether the dosing tip is blocked.
￭ Check whether the dosing port is sealed off
with a stopper.
￭ Check whether the VENT port is sealed off
with a stopper (vacuum in the supply bot-
tle!). The VENT port must be open for pres-
sure compensation.
￭ Remove the dosing drive and check
whether the dosing piston is connected to
the dosing drive. The piston stopper must
be flush with the upper side of the hous-
ing.