Application instructions
9
Application instructions
Wait at least 5 seconds before switching the instrument on and
then off again at the main switch.
In order for Testomat 2000
®
DUO to operate reliably, use Heyl
Testomat 2000
®
indicators in the pH-range 4
– 10.5!
With Testomat
®
instruments for water hardness monitoring, larger
quantities of heavy metal ions in the softened water might influ-
ence the colour reaction, especially iron above 0.5 mg/I, copper
above 0.1 mg/I and aluminium above 0.1 mg/l (brownish-red colour
display).
If the measuring water contains more than 20 mg/I CO
2
(carbonic
acid), incorrect evaluations cannot be excluded.
The concentration of influencing contents can be determined by
using our colourimetric TESTOVAL
®
test kit.
Careful handling of the instrument increases both its operational
reliability and service life! Therefore, carry out a visual inspection
at regular intervals as described below:
- Has the use-by date of the indicator expired?
- Are the hose connections of the dosing pump free of leaks?
- Is there air inside the dosing hoses?
- Are all the water connections free of leaks?
- Are the doors of the instrument closed properly?
- Is the instrument heavily soiled?
- Are the measuring chamber and the drain duct/drain hose
clean?
Trouble-free operation is only possible when maintenance is car-
ried out on a regular basis! For more information, please refer to
the section entitled “Maintenance” and the "Maintenance manual
of Testomat 2000
®
/ Testomat 2000 ECO
®
"
If problems occur, please refer to the section entitled "Error mes-
sages/Troubleshooting”.
