Metrohm 840 PC Control 5.0 / Touch Control - Manual (Page 313)

5 Troubleshooting – Maintenance
PC Control / Touch Control
301
5.2.8 822 Curve Simulator
The 822 Curve Simulator can be used as a diagnosis tool for checking
the recording of the titration curves and their evaluation. Titration
methods can be carried out and simulated measuring curves recorded
without the actual presence of a measuring solution.
Details about the connection and operation of this instrument are given
in the appropriate Instructions for Use.
Please note that such a simulation requires that a correctly configured
Dosimat or Dosino must be connected. A normal titration method is
started. This means that the exchange or dosing unit should be
emptied or the corresponding buret tip should be placed in a
sufficiently large collection vessel.
Connection
Switch off the Touch Control or pull out the Titrando mains cable or
the USB plug at the PC (PC Control).
First connect the analog output of the curve simulator with the
electrode input "Ind." of the Titrando. Use the 6.2116.020 Cable
with F-plugs at both ends.
The 822 Curve Simulator is connected to the MSB port of the
Titrando used. Take care that the dosing device is always the last
device behind the curve simulator in as short a chain of MSB
devices as possible (e. g. Titrando-MSB – Stirrer – 822 Curve
Simulator – dosing device).
If the internal dosing drive of the Titrando is used then the 822
Curve Simulator has to be connected to MSB port 2 of the Titrando.
Switch on the Touch Control or start the PC Control and activate the
checkbox "Send dosing signals to MSB2" under
System/Diagnosis/822 Curve Simulator. Confirm the
modification with [Set]. This copies the dosing signals to MSB port
2. Please note that this status can only be deactivated by a system
restart.
Switch on the Touch Control again or reinsert the mains plug and
start the PC Control software.
Simulation of a titration
For the following example of a simulation you should load the
Tutorial method from the examples of methods stored under
Card 1/Examples.
Rotate the curve selection switch on the 822 Curve Simulator to
curve 0 (Titration of an acid with a base).
Start the titration with [Start].
When the titration has been carried out you will obtain the following
example of a curve under Results/Curve: