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Vaisala Cooling Cover User manual

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IM-EN-CCPR43-A
User Guide
Vaisala K-PATENTS®
Cooling Cover PR-14038
PR-43
Cooling Cover User Guide
Document/Revision No. IM-EN-CCPR43/A Eecve: January 5, 2021
1 Introducon 1
© Copyright Vaisala 2021. All rights reserved.
1 Introducon
The cooling cover adds water cooling to a PR-43 refractometer when the refractometer
temperature threatens to rise too high for its electrical components. A cooling cover
is needed when the ambient temperature is over 45 °C (113 °F) or the refractometer
internal temperature alarm has been triggered, which happens when the internal tem-
perature rises over 65 °C (149 °F). It is recommended to use cooling cover when internal
temperature rises above 60 °C (140 °F). The cooling cover is installed between the cover
plate and the sensor cover.
Figure 1.1 Cooling cover
1.1 Disposal
When wishing to dispose of an obsolete instrument, please observe local
and naonal regulaons and requirements for the disposal of electrical
and electronic equipment. The cooling cover can be recycled with other
metallic waste of the same type.
2 Cooling Cover User Guide
Document/Revision No. IM-EN-CCPR43/A Eecve: January 5, 2021
2 Installaon
2.1 Installing the cooling cover
The cooling cover delivery contains the following parts:
• Cooling cover
• 2 x screw M4x25 Torx DIN7895
• O-ring PR-14002-FPM
• desiccant (dryer)
• 2 x M5x20 pulling screw
Important: Before opening refractometer the cover and touching the electronic parts,
ensure that the working table and the person are grounded. Wear wrist or foot ground-
ing equipment.
ESD
ESD
P4-034
Wear wrist or foot grounding equipment
Figure 2.1 Grounding the work environment
2 Installaon 3
© Copyright Vaisala 2021. All rights reserved.
To install the cooling cover:
1. Remove the cover plate retaining screws.
2. Remove the cover plate with M5x20 pulling screws.
Figure 2.2 Removing the cover plate with pulling screws
4 Cooling Cover User Guide
Document/Revision No. IM-EN-CCPR43/A Eecve: January 5, 2021
3. Detach the cable connectors from the circuit board. Then unscrew the circuit board.
Remove the desiccant and O-ring, they are not needed any more.
4. Add the new O-ring and the new desiccant to the cooling cover (fold the edges of
the desiccant under the package to make it t the slot) and screw on the circuit
board. Reaach the cable connectors to the circuit board.
5. Insert cooling cover into the refractometer, add cover plate and fasten with the new
longer screws. Note that there is no O-ring between the cover plate and the cooling
cover.
2 Installaon 5
© Copyright Vaisala 2021. All rights reserved.
1. Remove cover plate and detach cable connectors
from the circuit board
2. Then remove circuit board, desiccant dryer
and O-ring from the cover plate
3. Install new O-ring and desiccant dryer
supplied with the cooling cover to cooling
cover and then attach circuit board
4. Reattach cable connectors to circuit board
and insert cooling cover into Refractometer
and attach with cover plate
Cover plate
T20
T10
Cover plate
(do not reinstall O-ring)
M4x25 Torx A2 DIN7895
screws (supplied with
cooling cover) T20
Cooling cover
Cooling cover
O-ring
O-ring
Desiccant dryer
Desiccant dryer
Circuit board
Cable connectors
Circuit board
Cable connectors
P4-032
6 Cooling Cover User Guide
Document/Revision No. IM-EN-CCPR43/A Eecve: January 5, 2021
2.2 Connecng cooling water
Cooling water recommendaons
Temperature 5-25°C (41-77°F)
Pressure max. 6 bar (87 psi)
Flow max. 0.25 l/min (0.7 GPM)
The ow can be quite a bit below maximum as long as the sensor internal temperature
stays below 60°C (140°F). Vaisala recommends that used water is directed to a drain.
The coolant connecon is a 1/8 in NPT female thread. Connect inlet to one and outlet
to the other connecon, it does not maer which way they are connected, because the
cooling cover is symmetrical.
P4-033
1/8” NPT (F) Thread
Figure 2.3 Connecng the coolant hose
2 Installaon 7
© Copyright Vaisala 2021. All rights reserved.
2.3 Removing the cooling cover
If you want to remove the cooling cover, use the two M5x20 pulling screws: rst remove
the cover plate retaining screws and the cover plate. Then remove the cooling cover
with the pulling screws.
Figure 2.4 Removing the cooling cover with pulling screws
8 Cooling Cover User Guide
Document/Revision No. IM-EN-CCPR43/A Eecve: January 5, 2021
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