Metrohm 797 VA Computrace User Manual

Page 247

8.6 Analyze Electroplating Bath Solutions

797 VA Computrace – Software

235

>final sequence

1 SCN:Rm:

*****1** >

Scan line for incoming signal
from CT797

2 MOVE

next >

Move needle to sample

3 LIFT: 1

work mm >

Place needle at working posi-
tion

4 CTL:Rm:

************1 >

Set line: Needle immersed in
rinsing sol.

5 CTL:Rm:

************0 >

Note: If (as in this example) all used Dosinos are connected to the
797, the originally listed commands 6 – 10 of the

sample se-

quence

must be deleted.

Samples
Samples and Suppressor standard solutions are placed on the rack.
It is recommended to use the two inner rings with 11 ml sample
vessels. How frequently the calibration curve needs to be recorded
(with

Calibration

technique "DT Record calibration curve") depends

on the chemistry of the bath.

Note: Place a sample vessel with rinsing solution at the end of the
series.

Arrangement: At the first position a Suppressor standard solution
to record the calibration curve. Then samples, and, when a recali-
bration is necessary, another Suppressor standard solution. At the
end rinsing solution.

Example for a sample rack with 14 samples, 2 Suppressor stan-
dard solutions and one rinsing solution:

Suppressor standard

Rinsing solution

not used

Sample

112

111

Note:

Before

each

start, define the position of the first sample

vessel for the 838 parameter "

SAMPLE

" with the 838 keypad.

General Settings in the 797 Software