Metrohm 799 GPT Titrino - Manual (Page 200)

4.2. Diagnosis
799 GPT Titrino 196
4 Cylinder code, date, time
• Insert exchange unit or dummy to the internal dosing unit D0 and put the burette tip
into a collecting receptacle.
• If available, connect the external dosing units D1 or D2 with the exchange units.
• Press <0>.
date/time
cylinder code
• Press .
date XX-XX-XX XX:XX:XX
code:D0 XX ml activated dosing unit mL-code
• Check date and time.
• Check whether the ml-code does correspond with the exchange unit placed or not.
For the sake of completeness, different exchange units can be inserted to check their ml code. If desired, the ex-
change unit can be removed again. If no exchange unit is inserted display does not show the ml-code but „check
exchange unit !“.
• If external dosing unit are connected, select the dosing unit in question with key
<š>.
Check the external dosing unit in the same way as before the internal. If no dosing unit is connected display does not
show the ml-code but „check drive unit !“.
• Press .
diagnose press key 0...9
5 Motor timer test
• Press <6>.
motor-timer test
• Press .
pot.meter dV/dt  10?
• Turn knob ‘dV/dt’ to the right stop and press .
Test sequence:
a) In a first step, the frequency of the RC oscillator (analogue rate) is tested over a period
of 1 second.
b) In a second step, the frequency of the quartz oscillator (digital rate) is tested over a
period of 1 second.
c) If no error is found, after about 5 s it appears
motor-timer test o.k.