1716
GB
▪
The rubber eyecup can cause skin irritations if in
contact with skin for longer periods of time. In this
event, please contact your doctor.
▪
If possible, do not touch lenses with your fingers!
Warning!
Never leave children unsupervised with
the packing material as this can cause
suffocation.
This device is not intended for use by persons
(including children) with reduced physical, sensory
or mental abilities or who lack experience and
/ or knowledge, unless they are supervised by a
person who is responsible for their safety or unless
they receive instructions from this person on how
the equipment is to be used. Children must be
supervised in order to ensure that they do not play
with the device.
Do not leave packaging material around carelessly
as this can become a dangerous toy for children.
Packaging could contain a small white bag with
pellets. Do not open this bag. It is intended to keep
the device dry during transport.
BEFORE INITIAL USE
Remove protective film (if included) from prism
surface [2] and ensure the rubber eyecup is in the
correct position.
OPERATION / MEASUREMENT
The refractometer can quickly and precisely deter-
mine the content of anti-freeze agents in the coolant
circuit and windscreen washer system in your
vehicle. In addition, it has the option to determine
the acid density of the battery acid in your vehicle
battery. The measuring device must be adjusted to
establish correct measurements.
Zero Point Adjustment
1. Fold the prism cover [1] up.
2. Apply a few drops of distilled water [8] to the
prism surface [2].
3. Repress the prism cover [1]. The liquid quantity
should be measured in such a way that most of
the prism surface is moistened.
4. Look through the ocular [4] and point the refrac-
tometer including its prism surface [2] towards a
bright light source if possible.
5. Looking through the ocular [4], you will see a
light and dark field. Its boundary lines indicate
the refractive index on the scale also visible in
the ocular [4].
6. By using the calibration tools [7], the scale can
be adjusted and the measuring device calibrated
by turning the calibration screw [3] behind the
prism surface [2] (underneath the rubber cap).
The light-dark-border line must coincide with the
waterline. The room temperature should be at
+20 °C.
Caution!
The scales are set at an ambient air tem-
perature of +20 °C!
Measuring Process for Antifreeze
Protection-Check
1. Lift the prism cover [1] and apply a few drops of
cooling solution to be measured to the prism sur-
face [2] using the included pipette [10]. Distribute
the liquid evenly by pressing the prism cover [1].
2. Close the prism cover [1] and look at the measu-
ring scale through the ocular [4]. Point the refrac-
tometer including its prism surface [2] towards a
bright light source if possible.
3. Turn the adjustment ring [5] on the ocular [4] to
set the focus of the vision.
4. The border line on the measuring scale moves
depending on the anti-freeze agent concentra-
tion. This light-dark-border directly shows the
freezing point of the anti-freeze mix in °C on
the anti-freeze-scale [B]. The values show the
measured value for Propylene* (G13) and the
measured value for Ethylene** (G11 / G12). The
Propylene scale must also be used if you are not
familiar with the poured-in anti-freeze protection
or if it is a mixture of both. This is the only way
sufficient anti-freeze protection of the cooling
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