Metrohm 751 GPD Titrino - Manual (Page 206)

4.2. Diagnosis
751 GPD Titrino
203
11 External dosing units D 1 or D 2
This test makes sense only when the 751 GPD Titrino is operated in connection with external
dosing units (685 Dosimat or 700 Dosino).
The spindle drive and the cock changeover drive of the internal dispensing unit can be checked
with the aid of the function <prep> (see page 99).
• Connect the external dosint units D 1 or D 2 respectively.
• Insert exchange unit and put the burette tip into a collecting receptacle.
• Set the parameters of this function accord. to the following list (for setting the parameters
see configuration >prep.dosing elements).
Parameters for 700 Dosino Parameters for 685 Dosimat
configuration configuration
>prep.dosing elements >prep.dosing elements
power ON prep: OFF power ON prep: OFF
report: OFF report: OFF
dos.element: external D1 or D2 dos.element: external D1 or D2
warn.interv.DX OFF min warn.interv.DX OFF min
dos.drive DX: Dosino dos.drive DX: Dosimat
outlet: tip volume DX 3.5 ml
len.dos.tub.DX 40.0 cm cycles DX 2
diam.dos.tub.DX 2.0 mm dos.rate DX max. ml/min ml/min
len.asp.tub.DX. 25.0 cm fill rate DX max. ml/min ml/min
diam.asp.tub.DX 2.0 mm
dos.rate DX max. ml/min
fill rate DX max. ml/min
• Press <prep> several times, until
extern D1 prep
• or
extern D2 prep
Press <START>
The external dosing unit executes the following jobs:
a) To expell the total volume.
b) to fill the filling tube
c) to fill the cylinder
d) to fill the dosing tube.
12 Setting up original arrangement
Reconnect all peripherals disconnected at the start of the diagnostic routine and perform a
short function test with these.