Using this tableClick on any item in the table of contents to be taken directly to the relevant page.
Click on the Kipp & Zonen logo at the bottom of any page to be taken back to the table of contents.
7
Instruction Manual - CVF4
8
1. Introduction
This manual will show you how to install, use and maintain the CVF4 Ventilation Unit. The CVF4 is meant for ventilating solar
radiation sensors with the purpose to keep the mounted radiometer window or dome clean from dew, precipitation and
pollution. It can be used outdoors under all-weather conditions. The CVF4 has a built in heater to keep the air just above
ambient temperature.
Both the World Meteorological Organisation (WMO) and the Baseline Surface Radiation Network (BSRN) guidelines advise using
a ventilator to optimise the performance of radiometers in general.
The use of the CVF4 will:
- Increases the maintenance interval.
- Increase the accuracy of the measured data (cleaner dome / window)
- Reduce the zero offset of the radiometer.
The CVF4 is meant for all CM, CMP, SMP, CG, CGR and CUV radiometers. However with the CMP 3 and SMP3 and CGR 3 the
ventilation effect will be less due to the larger opening around the dome. The CVF4 is meant to run continuously. The heater can
either be switched on permanently for cold regions or be switched by a data logger or clock to remove dew in the morning and
be switched off afterwards. In that case the heater is operated from a 2 hours before sunrise to an hour after sunrise. This saves
power in situations where power is limited such as PV operated sites.
This manual, together with the instruction sheet, give information related to installation, maintenance, product specifications
and trouble shooting of the CVF4.
If any questions should remain, please feel free to contact your Kipp & Zonen dealer or e-mail: info@kippzonen.com .
For information about other Kipp & Zonen products or to check for any update of this manual, go to www.kippzonen.com .
Instruction Manual - CVF4
9
1.1 CVF4 top side
Ventilator
1
Heater
2
3
Mounting holes CMP 3, SMP3 and CGR 3
4
Mounting holes all other instruments
5
Connector
6
Cover nut
7
Slit for radiometer cable
1
6
1.2 CVF4 bottom side
Filter cover
1
Connector box
2
3
Mounting feet for SOLYS 2 / Feet for stabilisation
4
Feet for stabilisation / Mounting feet for 2AP
5
Mounting holes for mounting feet on CM 121C shadow ring adapter
6
Cover nut
1
6
2
2
3
4
4
3
7
5
2
5
4
3
3
4
5
6
Instruction Manual - CVF4
10
2. Installation
The CVF4 consists of:
- Base plate with ventilator, heater and connector
- Replaceable filter plus cover
- Top cover
2.1 Included with the product
The following items are included with the CVF4 ventilation unit:
1
Ventilation Unit
2
Cable, pre-wired with 4 pins connector or connector only for customer cable
3
Fixing kit with screws, washers and Allan key
4
Instruction sheet
5
Pack of 5 spare ventilation fan inlet filters
6
Product Documentation CD
1
For optional accessories see chapter 3.
2
3
4
5
6
2.2 Tools required
If the CVF4 is mounted with the supplied screws only the supplied Allan key is required. Make sure there is space to fasten the
screw under the bottom of the plate. To fasten the radiometers other Allan keys or screwdrivers may be necessary.
2.3 Preparation
Like for any radiometer with 360° field of view, make sure there are no obstructions that are higher than ten times their distance
when selecting a location for the CVF4.
h
>10 x h
Instruction Manual - CVF4
11
2.4 Installation procedure
First the CVF4 is screwed flat on its mounting plate. In case the CVF4 is mounted on a solar tracker, the tracker has to be levelled first.
On our sun trackers the CVF4 is positioned such that the fan sticks out over the edge of the plate. This ensures the air inlet is
never blocked (see picture of the CVF4 on the SOLYS 2 Sun Tracker on the next page). The locations of the CVF4 mounting holes
on the SOLYS 2 top mounting plate are shown below.
CVF4 mounting holes
When using your own mounting plate, make sure the CVF4 is mounted in the same way with the fan sticking out. The CVF4
mounting holes size and distances are indicated in the drawing below.
Ø 7 mm (2x)
The CVF4 is mounted with the supplied 4 washers and 2 screws through mounting plates from 4 to 8 mm thick. The other 2 feet
are for stability but do not need screws.
Instruction Manual - CVF4
12
Then the radiometer is mounted in the CVF4 and levelled with its own levelling feet. Afterwards the radiometer mounting screws
and shoulder washers are fitted (not secured yet).
In case the CVF4 is mounted on a solar tracker, finish the alignment of the tracker first before securing the radiometer screws
because tracker (and radiometer) levelling might need re-adjustment.
After all mounting screws have been secured the cables of the CVF4 and the radiometer can be connected. The radiometer cable
goes (down) through the slit in the CVF4 base plate.
Finally the CVF4 cover can be put on and the two cover nuts can be fastened.
Make sure the cover is horizontal (check equal space around the radiometer dome) and the two cover nuts are fastened hand tight.
SOLYS 2 with top mounting plate and 3 x CVF4 SOLYS 2 with small top mounting plate with CVF4
Instruction Manual - CVF4
13
2.5 Electrical connections
VENTILATION UNIT CONNECTION
Wire
Kabel
Fil
Cable
Red+ Ventilator
1
Rot • Rouge • Rojo+ Ventilator
Blue+ Heater
Blau • Bleu • Azul+ Heizung
2
Green
Grün • Vert • Verde
3
Yellow
Gelb • Jaune • Amarillo
4
ANSCHLUSS • RACCORDEMENT • CONEXIÓN
Function
Funktion
Fonction
Función
+ Ventilateur
+ Ventilador
+ Chauffage
+ Calentador
Power supply12 VDC ground, tacho ground
Spannungsversorgung
Alimentation
Fuente de alimentación
5 V tacho output
Connect with
Anschluss an
Relier à
Conectar con
+12 VDC @ 0.4 A
+12 VDC @ 0.5 A
Erde
Terre
Tierra
+ Hi
4
1
VENTILATOR
3
Shield
Abschirmung
Protection
Malla
* Connect to ground if radiometer not grounded
Mit Erde verbinden, wenn das Radiometer nicht geerdet ist
Reliez à la terre si le radiomètre n'est pas connecté
Conectar a tierra si el radiómetro no lo está
Housing
Gehäuse
Boîte
Cubierta
Ground
Erde
Terre
Tierra
R1
2
R2
The CVF4 has a 4 wire cable for connecting the 12 VDC to the ventilator and heater. The ground is common for the ventilator,
heater and the tacho output.
The tacho output (Ut in diagram below, pin 4, yellow wire) provides a 5 Volt signal that gives two pulses per revolution. It can
be connected to a data logger to (remotely) check proper operation of the CVF4. The tacho output uses the same power supply
ground (pin 3, green wire).
+12 Volt
R2
R1Ut
0 Volt
The nominal speed is 4400 rpm, resulting in 8800 pulses per minute which equals 146 Hz on the tacho output.
Changes often indicate pollution of the filter (higher frequency), or mechanical problems with ventilator (lower frequency).
If sufficient power is available it is advised to use the heater in combination with the ventilator even in warm climates. The
heater will prevent deposition of dew in the morning.
Instruction Manual - CVF4
14
3. Accessories
3.1 Spare CVF4 filters
Article number 2682047
Set of 5 spare ventilation fan inlet filters.
3.2 Power supply
Two optional 12 VDC power supplies are available for outdoor (CVP 1) and indoor (CVP 2) use.
3.2.1 CVP 1
Article number 0357700
The CVP 1 is a waterproof (IP 65) power supply for outdoor use with 12 VDC @ 3.5 A output.
The input is wide range 100 to 240 VAC, 50 or 60 Hz.
3.2.2 CVP 2
Article number 0349401
This is a 12 VDC, 2.5 A power supply for indoor use with a wide VAC input range of 110 to 230 VAC, 50 or 60 Hz. It comes with
universal mains power plugs for Europe, UK, USA and Australia.
The DC output cable from the power supply unit are stripped and tinned wires, marked with a red sleeve on the + wire.
Instruction Manual - CVF4
15
3.3 CMF4 Mounting Fixture
Article number 0362703
CMF4
The CMF4 consists of a mounting plate plus rod. It can be used for one CVF4, looking up or 2 CVF4’s where one is looking down.
This allows for highly accurate albedo or net-radiation measurements with 2 ventilated radiometers.
3.4 CMB 1 Mounting Bracket
Article number 0369701
To mount the CMF4 to a mast or wall the CMB 1 mounting bracket can be used.
Instruction Manual - CVF4
16
3.5 Adapter for use of the CVF4 in the CM 121C shadow ring
CVF4
Remove CVF4 feet (4x) and
remount two feet in these counterbore holes
CVF Adapter
M6 x 10 cap screw (2x)
Relocation of 2 of the CVF4 mounting feet to fit it on the CM 121C shadow ring
The blue adapter part is included with the CM 121C.
CM 121B (Article number 0346900) is not supplied with, nor aligned for the CVF4 adapter (Article number 0346700)
CM 121C (Article number 0346901) is aligned for and supplied with the CVF4 adapter
Instruction Manual - CVF4
17
Instruction Manual - CVF4
18
4. Maintenance
Regular inspection of the CVF4 is advised. Depending on the location (air pollution) this can be monthly or yearly. When on site
for inspection of other instruments it is advised to check the CVF4 filter.
At the same time radiometer levelling and desiccant can be checked. For access to the desiccant the 2 mounting nuts have to be
loosened and the top cover taken off.
When replacing the cover, make sure it is placed correctly. This can best be done by checking the opening around the radiometer,
this should be evenly spaced.
Tip: When the tacho output is logged with the radiometer data, the performance of the ventilator can be remotely checked.
1
3
2
Refer to radiometer instruction sheet for maintenance instructions.
1
Regularly inspect the fan inlet by unclipping the cover.
2
For optimal air flow, make sure the diagonal line on the cover is in line with the ventilator part (see above drawing).
The filter cover clicks back on the ventilator.
Clean or replace filter every 6 months.
3
The interval strongly depends on the location and pollution of the air. Discolouration or pollution of the plastic cover will not
affect the proper operation of the radiometer. (the radiometer can not ‘see’ the CVF4 cover). Cleaning of the cover can be
done with water and a brush or cloth.
Instruction Manual - CVF4
19
Instruction Manual - CVF4
20
5. Specification
Kipp & Zonen reserves the right to make changes to specifications and other product documentation without prior notice.
5.1 Optical and electrical
Specifications
Compatible instruments
Compliance with standards
Power consumption ventilator
Power consumption heater (selectable)
Operational voltage range
Operational temperature range-40 °C to +70°C
Storage temperature range
Humidity range
Ingress Protection (IP) rating
Tacho outputTwo tacho pulses (5 Volt) per revolution, 8800 pulses per minute (nominal), 146 Hz
Standard cable length10 m
Optional cable lengths25 m and 50 m
Increase of air temperature0.25 K at 0 W heating
Zero offset A reduction50% reduction for CMP’s
Offset by heating-2 W/m
Cable resistance0.16 Ω/m (2 x 0.08 Ω/m)
Voltage drop at maximum heating0.075 V/m
Size0.23 m diameter, length 0.355 m
AdvantagesEasier filter access
Note: The performance specifications quoted are worst-case and/or maximum values
(unheated)
CMP 6, CMP10, CMP 11, SMP11, CMP 21, CMP 22, CGR 4, CUV 5
CMP 3, SMP3 and CGR 3 with reduced specifications
Older type single radiometers: CM, CG and CUV will also fit
ISO/TR 9901, BSRN operations manual
5 W continuously at 12 VDC
5.5 W at 12 VDC
8 to 13.5 V
-40°C to +70 °C
0 to 100% non-condensing
54
1 K at 5.5 W heating
2
at 5.5 W heating (CMP 11), no offset for CGR pyrgeometers
No build-up of snow under ventilator (hangs over mounting platform/located higher)
Easy removal of cover
Because of radial ventilator, 5x better circulation of air over the top of the dome
Lower power consumption for both ventilator and heater with improved performance
If you require any support for your Kipp & Zonen product please contact your local representative in the first instance. The
information can be found in the ‘Contact’ section of our website at www.kippzonen.com .
Alternatively, you can contact us directly at www.kippzonen.com/support
Please include the following information:
• Instrument model
• Instrument serial number
• Details of the fault or problem
• Examples of data files
• Readout device or data acquisition system
• Interfaces and power supplies
• History of any previous repairs or modifications
• Pictures of the installation
• Overview of the local environment conditions
Kipp & Zonen guarantees that your information will not be shared with other organisations.
Instruction Manual - CVF4
25
Our customer support remains at your disposal for any maintenance or repair, calibration,
supplies and spares.
Für Servicearbeiten und Kalibrierung, Verbrauchsmaterial und Ersatzteile steht Ihnen unsere
Customer Support Abteilung zur Verfügung.
Notre service 'Support Clientèle' reste à votre entière disposition pour tout problème de
maintenance, réparation ou d'étalonnage ainsi que pour les accessoires et pièces de rechange.
Nuestro servicio de atención al cliente esta a su disposición para cualquier actuación de
mantenimiento, reparación, calibración y suministro de repuestos.
HEAD OFFICE
Kipp & Zonen B.V.
Delftechpark 36, 2628 XH Delft
P.O. Box 507, 2600 AM Delft
The Netherlands