Instruction Manual

8 How to ...?
797 VA Computrace – Software
224
The “Addition mixing time” can be defined on the Deter-
mination
tab of the EDIT WORKING METHOD PARAME-
TERS
window.
6. Second Measurement:
a. Conditioning cycles (Number of “conditioning cycles” de-
fined in No. of cycles on the Voltammetric tab of the EDIT
WORKING METHOD PARAMETERS
window)
b.
Pretreatment
c.
Sweep (Number of sweeps is defined in No. of sweeps,
number of saved sweeps in Save last .. sweeps on the Volt-
ammetric
tab of the EDIT WORKING METHOD PARAME-
TERS
window)
Note: Instead of repeating sweeps, you can also repeat
the whole Measurement cycle. Define the number of repli-
cations in No. of replications on the Determination tab of
the EDIT WORKING METHOD PARAMETERS window. Met-
rohm recommends to set the No. of replications on 1, the
No. of sweeps on 4 and Save last .. sweeps on 2.
7. Second Addition
8. Addition mixing time
Continue with measurement, addition, mixing as long as necessary.
Brightener Analysis with 838 Advanced Sample Processor and "MLAT"
Following installations and settings are recommended for the au-
tomated Brightener determination with the 838 Advanced Sample
Processor and
Calibration technique "MLAT":
Instruments
Install the 838 Advanced Sample Processor, three 800 Dosi-
nos and a 732 Relay Box with two 823 Membrane Pump
Units (see Hardware Manual 797 and Instructions for Use 838).
Dosinos:
Dosino 1: 50 mL Exchange Unit VMS solution
Dosino 2: 2 mL Exchange Unit Brightener standard so-
lution
Dosino 3: 2 mL Exchange Unit Suppressor concentrate
Method at 838
Before each start, define the position of the first sample vessel for
the 838 parameter "SAMPLE" with the 838 keypad.
Set method LAT at the 838 Advanced Sample Processor.