5
4
4 Result
. . . . . . . . . . . . . . . . . . . . . . . . . .43
Result list
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
5 Quality assurance
. . . . . . . . . . .46
5.1 Recalibration . . . . . . . . . . . . . . . . . . . . . . . .46
5 .1 .1 Procedure . . . . . . . . . . . . . . . . . . . . . . .47
5 .1 .2 Calibration results . . . . . . . . . . . . . . . . .50
5.2 Checking the instrument . . . . . . . . . . . . . . .51
5 .2 .1 Analytical quality assurance (AQA) . . . . .51
Monitoring of the instrument . . . . . . . . .51
Total system monitoring . . . . . . . . . . . . .51
5 .2 .2 RQcheck procedure . . . . . . . . . . . . . . . .52
5 .2 .3 RQcheck results . . . . . . . . . . . . . . . . . .54
6 System information
. . . . . . . .57
7 Maintenance of the
instrument
. . . . . . . . . . . . . . . . . . . .59
7.1 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
7.2 Cleaning the strip adapter . . . . . . . . . . . . . .60
7 .2 .1 Procedure . . . . . . . . . . . . . . . . . . . . . . .60
8 Trouble-shooting
. . . . . . . . . . . .61
8.1 User messages on the display . . . . . . . . . . .61
8.2 Error messages . . . . . . . . . . . . . . . . . . . . . .63
8.3 Other faults . . . . . . . . . . . . . . . . . . . . . . . . .65
9 Technical data
. . . . . . . . . . . . . . . .66
10 Accessories
. . . . . . . . . . . . . . . . . . .67
11 Service / Warranty
. . . . . . . . .68
1
Intented use
The Reflectoquant
®
RQflex
®
20 reflectometer is intented to be used exclusively according to
the operating manual .
The reflectometer was developed for performing analyses of chemical parameters in water,
food & beverage samples, and environmental samples using Reflectoquant
®
test strips in
the laboratory, on the production line or in the field .
Any other use is considered to be unauthorized .
2
Getting started
2.1
Description of the instrument
Your RQflex
®
20 is a versatile, precise instrument . It is part of the
Reflectoquant
®
system with the components:
• instrument RQflex
®
20
• Reflectoquant
®
tests
• test- and batch-specific barcode strip
According to the principle of reflectometry (remission photometry),
reflected light from the test strip is measured . Just as in classical photo-
metry, the difference in intensity of emitted and reflected light allows a
quantitative determination of the concentration of specific analytes .
