Metrohm 797 VA Computrace - Manual (Page 80)

2 Installation
797 VA Computrace / Hardware-Manual 8.797.8001EN
72
2.13.4 Communication diagram DT
797 VA Computrace Dosinos 1..3
838 Advanced Sample
Processor
731 Relay Box
Set line: Start 838 (TTL 3)
Ready (TTL 7)
Set line: Siphoning (TTL 5)
Prep Dosino 1,2 ?
Prep Dosino 1, 2
YES
Set line: Siphoning (TTL 5)
Wait siphoning time
No. of Prep
cycles
NO
Set line: Immerse needle into sample (TTL 4)
Ready (TTL 7)
Predose
Measurement
Set line: Siphoning (TTL 5)
Wait siphoning time
Set line: Move to rinsing vessel (TTL 4)
Ready (TTL 7)
Set line: Siphoning (TTL 5)
Wait siphoning time
Set line: Rinsing (TTL 6)
Wait rinsing time
No. of rinsing cycles
More samples ?
NO
YES
Set line: End of sample table (TTL 2)
DT Suppressors with calibration curve / DT Record calibration curve
active ?
YES
NO
Scan line : 838 ready
(TTL 7)
Scan line : 838 ready
(TTL 7)
Scan line : 838 ready
(TTL 7)
Wait siphoning time
Prep Dosino 3 ?
Prep Dosino 3
YES
NO
No. of Prep
cycles
Set line: Siphoning (TTL 5)
Wait siphoning time
Set line: Rinsing (TTL 6)
Wait rinsing time
No. of rinsing cycles
Empty Dosino 3
Prep Dosino 3 ?
Prep Dosino 3
YES
NO
No. of Prep
cycles
Set line: Siphoning (TTL 5)
Wait siphoning time
Export/Print results
Set line: End of sample (TTL 1)
Note: Use
for predose> to
dose VMS via
Dosino 1
Note: Is only
done, if Dosino 3
was preped before
Ti
m
el
in
e
End
Fig. 40: Communication diagram for DT