Metrohm 765 Dosimat - Manual (Page 55)

5.1 Technical specifications
765 Dosimat
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5 Appendix
5.1 Technical specifications
Exchange units 1, 5, 10, 20, 50 mL burette cylinder volumes,
preferably with flat cock for automatic cock changeover
Resolution 10'000 pulses per 100% of burette volume
Exactitude Metrohm dosimats and exchange units meet the requirements
of ISO/EN/DIN Standard 8655-3 "Piston-operated volumetric
apparatus – Part 3: Piston burets" and DIN Standard 12 650.
Limits according to ISO/EN/DIN 8655-3
Cylinder
volume
Max. permissible system. error Max. permissible random error
1 mL ± 0.6% ± 6 µL ± 0.1% ± 1 µL
5 mL ± 0.3% ± 15 µL ± 0.1% ± 5 µL
10 mL ± 0.3% ± 20 µL ± 0.07% ± 7 µL
20 mL ± 0.2% ± 40 µL ± 0.07% ± 14 µL
50 mL ± 0.2% ± 100 µL ± 0.05% ± 25 µL
Metrohm agencies throughout the world offer you the possibil-
ity of checking the accuracy of your exchange units and Dosi-
mats locally and also of certifying them. If the dosing cylinder
and/or piston of an exchange unit are replaced then we rec-
ommend that an accuracy check is carried out.
Dispensing time for 100% of burette cylinder volume
analogue setting 20 s ... app. 17 min
digital setting 20 s ... app. 17 h
Modes
DOS Dosing, with the ability to calculate a result from the dosed
volume
DIS R Repetitive Dispensing
DIS C Cumulative Dispensing
PIP Pipetting
DIL Diluting
CNT D Preparation of solutions with preselected content
User memory for 10 complete user modes
Data outputs
digital Data transfer interface according to RS 232 C
analogue
Representation Volume as voltage signal: 0 ... 1000 mV = 1, 2 ... 10 burette
cylinder volumes (selectable)
Resolution 1 mV