Replacing The Cooling Water; Checking The Recirculating Cooling Unit - struers LaboPress-3 Gebrauchsanweisung

Replacing the Cooling Water

Checking the Recirculation
Cooling Unit
22
LaboPress-3
Instruction Manual
Only relevant when a Recirculation Cooling Unit is connected:
Replace the cooling water in the Recirculation Cooling Unit at
least once a month.
Place a Disposable Plastic Container (TREPO) in the tank
and fold it over the edge.
Fill the tank with 30 l of water. NB! Too high a level of
coolant in the tank might damage the pump.
Add Struers Additive according to the instructions.
Put the lid on the tank.
Place the pump in the lid
Always maintain the correct concentration of Struers Additive in the cooling
water (percentage stated on the container of the Additive). Remember to
add Struers Additive each time you refill with water.
The cooling unit should be checked for cooling water every week
and refilled when the flushing pump cannot reach the cooling
water. Remember to add Struers Additive for Cooling Fluid: One
part of Additive for 33 parts of water.
The concentration of additive should always lie between 2.7 and
3.3%; the pH should be around 9. Replace the cooling water if pH
is 8.0.
To check the concentration of additive, use a refractometer (0-10
Brix, see diagram.). Concentration = 2 x Brix. Add Struers
Additive for Cooling Fluid if the concentration is lower than 2.7%.
Add water if the concentration is higher than 3.3%.
IMPORTANT