Metrohm 700 Dosino - Manual (Page 38)

3. The Dosino in practice
700 Dosino, Instructions for Use
32
⇒ Place the dosing unit with attached drive vertically on the dis-
tributor, marking rib on marking rib, and turn the dosing unit to
the left until you can clearly hear the spring clip snap into po-
sition. You should now be able to remove the drive from the
dosing unit.
⇒ You can also directly dismantle the dosing unit by placing the
dosing buret without the distributor vertically on a flat surface
and removing the drive. If you now remove the dosing unit
housing the interior of the dosing unit with centering tube and
cylinder, etc. is freely accessible. Then reassemble the dosing
unit properly according to the instructions given on page 17ff.
If the valve cannot be rotated or if the piston does not move properly to the zero posi-
tion then the dosing unit must be dismantled by a technician from your local Metrohm
service center.
If a dosing cylinder filled with a chemical is opened improperly this can damage the
dosing unit and/or the dosing drive.
The dosing drive housing must not be opened as the control electronics of the drive
are very susceptible to mechanical damage.
Dosino buret cannot be addressed by the control instrument.
Possible cause:
• Connection between Dosino and control instrument is in-
terrupted or the Dosino is in a faulty condition.
⇒ Check cable connections.
⇒ Switch control instrument off and on again.
⇒ Check the dosing and filling rates.
If this does not remedy the problem:
⇒ Contact your local Metrohm service center.
Control instrument does not recognize the Dosino buret.
Possible cause:
• Connection between Dosino and control instrument is in-
terrupted or the Dosino has not been initialized.
⇒ Check cable connections.
⇒ Switch control instrument off and on again.
⇒ If a 729 Dosimat interface is connected check its E-Bus ad-
dress.
If this does not remedy the problem:
⇒ Contact your local Metrohm service center.