Metrohm 726 Titroprocessor - Manual (Page 59)

4. Manual operation Manual operation
726 Titroprocessor, Instructions for use 53 53
B1, B2 Measuring electrode of measuring group
‘Sensors B’
Bdiff Differential amplification arrangement at
measuring group ‘Sensors B’
BT Temperature sensor Pt100/1000 of
measuring group ‘Sensors B’
Bpol Polarized electrode of measuring group
‘Sensors B’
In order to operate an instrument or a sensor move the field cursor to the
corresponding editing block and press the corresponding softkey. Press the
or key to change between dosing devices and sensors.
In order to address additional instruments, e.g. dosing devices B1 … C4 or
a sensor in measuring group B, press the key. <с с > or
can be used to switch between the screens of the various interfaces
or measuring groups.
4.2 Dosing devices
Twelve dosing devices can be connected simultaneously to the 726
Titroprocessor and comfortably operated by 'Manual control'. It is possible
to operate dosing devices manually while determinations are being carried
out. The dosing devices in use are blocked for manual operation by the
Titroprocessor; they are marked as 'locked'.
The name and concentration of a reagent can be entered for each dosing
device. The operator can use this to force the Titroprocessor to check the
reagent required for a method before it is used.
4.2.1 Automatic reagent check
In order to ensure that the dosing device settings in a method coincide with
the current settings of the manual control page (in which the actual
occupancy of the dosing devices should be entered) it is possible to force a
comparative check to be carried out.
If a reagent name and/or a concentration for a dosing device have been
entered in the method and in the 'Manual control page' then an automatic
reagent check is carried out. The two entries are compared with each other.
Variations in a reagent entry or its concentration produce an error message
at the start of the particular command or mode.
The automatic reagent check is suppressed if no entries have been made
for reagent and concentration in the method or if the corresponding entries
have been completely deleted in 'Manual control page'.
³ Dos. drive A1 700 ß Manual control page
³ Reagent AgNO3
³ Concentr. 0.01 mol/L
â Method
DET_PH* Determination of chloride
Reagent AgNO3 Sensor
Concentr. 0.01 mol/L Meas. input A1
Dos. drive A1
In titration modes the 'Reagent' field is a selection list in which the
reagent names and concentrations available on the manual control page
are present.