Metrohm 765 Dosimat - Manual (Page 32)

3.2. Diagnosis
765 Dosimat
28
3. Power off and wait for 5 s.
4. Power on and simultaneously press key <0> and keep pressed until:
special key 0..6
5. <3>
auto fill ???
└─┬─┘
check whether display reads 'on' or 'off' (make note!)
6. Press if auto fill 'on' otherwise go on with item 7.
auto fill off
7. ,
The dotted pattern is displayed, afterwards the display changes to the mode used last before starting the di-
agnosis.
Dosimat fills.
8. Actuate several times until the display shows:
DOS
9. < ENTER >
DOS 0.000 ml
10.
↑ OFF ml/min
11. < RATE >
↓ xx ml/min
xx : (depending on exchange unit code)
12.
↓ OFF ml/min
13. < ENTER >
DOS 0.000 ml
14. Knob 'dV/dt' fully to the right.
15. Press feed button 6.2107.000 (if not available, ) all the time until the piston
rod reaches the top position and simultaneously measure the time from start to
stop.
cylinder empty!
Spindle remains at top position.
The running time of the spindle is 18 ... 22 s.
16. Measure the spindle height [can be performed only if dummy exchange unit
3.496.0070 is fitted, or the exchange unit removed and the locking switch (in the
right-hand hole) carefully actuated by means of a screw driver].