44
8
Trouble shooting
The device does not respond to keys being pressed, the display is dark.
The internal program is disturbed
(e.g. by electrostatic charging or
mains overvoltage).
Switch device off, switch it on again after 10 s.
The display contrast is misadjusted.
Use the knurled knob at the right side
of the bottom to adjust the contrast.
The stirrer does not work.
The connection contacts are dirty.
Clean contacts.
The dosing unit is not filled correctly.
The reagent bottle is empty.
Replace or top up reagent bottle.
The hose is not immersed deeply
enough in the reagent bottle.
Immerse the hose deeper in the reagent bottle
or top up reagents.
The dosing unit is not properly locked.
Latch dosing unit with a quarter rotation in the lower position.
Air bubbles in the system
The valve is defective.
Replace valve.
The hose connections are not tight.
Check: Has the hose been pulled out of the
threaded connection? Fasten fingertight.
Replace hoses plus screw connectors.
The hose is not immersed deeply
enough in the reagent bottle.
Immerse the hose deeper in the reagent bottle
or top up reagents.
The titration tip drips after use.
Air bubbles in the system
.
Set longer filling time.
When installing the dosing unit the piston rod is not pulled in correctly, the device “rattles”.
Oblique application of piston rod.
Re-apply the piston rod vertically.
The titration solution is not titrated/dosed.
The dosing unit is not properly filled
Perform initial filling.
The dosing unit is not properly locked.
Lock dosing unit with a quarter rotation
in the lower position (
&
Fig. 30).
The hose or the titration tip
are bent or obstructed.
Check proper flow through hose and tip,
replace if required.
The system contains air bubbles.
Please refer to “Air bubbles in the dosing system”.
Undissolved parts in the titration solution.
Filter or replace titration solution.
Valve hoses are mixed up.
Connect hoses (
&
Fig. 1 + 8).
Data transfer to the printer/computer does not work.
Set proper transfer parameters.
Setting: 4800 baud, 7 data bits, no parity, no handshake.
Using an appropriate cable?
Use TZ 3095 for printer or TZ 3096 / TZ 3097 for PC.
Cable correctly connected?
The
middle
socket is the RS-232-C interface 1.
Check cable connection; are the screws on the side
of the PC tightened?
PC: Possibly „COM 1“ and „COM 2“ were mixed up!
Defective cable.
Replace cable.
Malfunction of printer/PC or
TITRONIC
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universal Piston Burette
Switch device off, switch in on again after 10 s.
