Metrohm 865 Dosimat plus - Manual (Page 79)

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865 Dosimat plus ￭￭￭￭￭￭￭￭ 69
Dosing mode LQT
Output 0
Output 1
Output 2
Output 3
Output 4
Ready/EOD
Error
Start
Stop
Input 0
Input 1
[Fill]
EOD [GO] [GO] [GO] [GO] [GO] [GO]
Pulse
Figure 25 Remote status diagram LQT
EOD = End of Determination
8.7 Pulse control
The 865 Dosimat plus can be controlled by a control device via an elec-
tronic pulse control for simple dosing. Controlling is carried out via the 9-
pin remote interface. The pulse control is integrated in the DOS method
(manual dosing), whereby the pulse control replaces the manual dosing.
However, all functions of the method (result calculation, report output,
etc.) are available.
Remote control
A pulse (
≥ 1 ms) on the remote line Input 0 triggers a single dosing step
of 1/10000 of the cylinder volume. The smallest volume of a dosing step
always depends on the cylinder volume of the exchange unit used.
The dosing pulses are immediately put out at executing on the remote line
Output 3 (50…500 µs).
The filling of the dosing cylinder can be triggered on the remote line
Input 1.
Functional assignment of the remote interface:
Pin No. Assigment Function
1 Output 0 Ready (low)
4 Output 3 Pulse out (low)
5 Output 4 Error (low)
6 GND
8 Input 0 Dosing (low)