838 method for trace analysis – Metrohm 797 VA Computrace User Manual

Page 228

8 How to ...?

797 VA Computrace – Software

216

838 Advanced Sample Processor. You can use 50 mL sample
vessels (on the two outer rings) or 11 mL sample vessels (on
the two inner rings). Place the sample on the outer (e.g. posi-
tion 1) of the two rings and the rinsing solution on the inner
(e.g. position 29) of the two rings.

Define the position of the

first sample vessel for the 838 parameter "

SAMPLE

" with the

838 keypad.

13.

Click on

MAIN WINDOW

/ Window / Monitor

to open the

MONITOR

window.

14.

Start the measurement by clicking the

icon in the

MAIN

WINDOW

or the

button in the

MONITORING

window.

15.

Follow the instructions in the appearing message windows.

Note: If you want to measure all samples with the same working
method, you can select

Repeat current

method for Working met-

hod source on the

Automation

tab of the

GENERAL SETTINGS

win-

dow. The

SAMPLE TABLE

window is not accessible with

Repeat

current method

838 method for trace analysis

For automated trace analysis with the 838 Advanced Sample
Processor it is recommended to set the method VA at the sample
changer.
The method VA has the following sequence:
VA

parameters

method VA
number of samples

rack

> Number of samples to be

processed (entire sample
rack)

>start sequence

1 CTL:Rm:

INIT

> Initialize Remote lines

2 Move

sample

> First Sample on Pos. "SAM-

PLE"

3 CTL:Rm:

************1

> Remote start CT797

4 CTL:Rm:

************0

>sample sequence

1 SCN:Rm:

*****1**

> Scan line for incoming signal

from CT797

2 MOVE

sample

> Move needle to sample

3 LIFT: 1

work mm

> Place needle at working posi-

tion

4 PERISTALT: 300 s

> Sample

transfer

5 CTL:Rm:

************1

> Set line: sample transfer

ready

6 CTL:Rm:

************0