Metrohm 751 GPD Titrino - Manual (Page 199)

4.2. Diagnosis
751 GPD 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 <Enter>.
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
exchange 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 <Ù>.
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 <Clear>.
diagnose press key 0...9
5 Motor timer test
• Press <6>.
motor-timer test
• Press <Enter>.
pot.meter dV/dt Ь Ь 10?
• Turn knob ‘dVdt’ to the right stop and press <Enter>.
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.
• Press <Clear>.
diagnose press key 0...9