18
solution is guaranteed.
5. The measuring result will not be affected by the
temperature of the cooling solution.
6. After measuring has occurred, clean the included
pipette [10] and the refractometer thoroughly.
* In Europe, Propylene is primarily used as an anti-freeze agent.
** Outside of Europe, Ethylene is primarily used as an
anti-freeze agent.
Measuring Process for Windscreen Washer
Fluid-Check
1. The measuring process is identical to the one
used for the anti-freeze-check.
2. For the windscreen washer fluid-check [C], the
measured value can be read in °C on the measu-
ring scale and indicates a guideline value, as
the composition of individual anti-freeze agents
varies.
3. After measuring has occurred, clean the included
pipette [10] and the refractometer thoroughly.
Measuring Process for determining Battery
Acid Density
1. Instead of the anti-freeze solution, apply a little
battery acid to the prism surface [2] by using the
pipette [10].
2. Take readings for the acid density in g/cm
3
(kg/l) by using the light-dark-border on the
measuring scale for determining [A] “- / +“ the
battery acid density.
3. The scale [A] is divided into three areas to deter-
mine the battery state of charge (SOC).
RECHARGE = replace/recharge (<1.20 g/cm³);
Battery State of Charge (SOC)
~50%
FAIR = acceptable
(1.20 to 1.25 g/cm³); Battery
State of Charge (SOC) ~75%
GOOD = good (>1.25 g/cm³); Battery
State of Charge (SOC) ~100%
