INSTALLATION AND
MAINTENANCE GUIDE
Static Pressure Head
SPH20
– Eliminates effectively wind disturbances from pressure measurements
to many barometers, directly to Vaisala PTB210
– Fits to severe outdoor applications
© Vaisala 2012. All rights reserved.
*M010016EN*
INTRODUCTION
Vaisala model SPH20 Pressure Head provides an effective elimination of pressure variations in the barometer due to the wind. The heated plates offer an excellent outdoor performance in cold, icy and wet conditions. The SPH20 can be integrated directly with the Vaisala PTB210 barometer or any other barometer.
ASSEMBLING
Screw the lower bar to the threaded sleeve of the lower plates
(with 6 holes).
MOUNTING
Select an open location, prefereably a place higher than the surroundings, with no buildings or trees nearby. Attach the
SPH20 to a horizontal pole using a mounting plate. A suitable pole is Vaisala sensor mast, type DKP12. However, any other horizontal pole with two screws (M6) in a distance of 41 mm can be used.
NOTE The recommended distance of the SPH20 from the vertical pole is at least 1 m.
1. Loosen the two fixing screws of the pole and fix the SPH20
into the pole as indicated in Figure 1.
2. Attach the SPH20 by tightening the screws. (The pressure
Head is removed by loosening the two screws).
CONNECTION TO THE VAISALA PTB210
Visualization in Figure 2.
1. Detach the threaded nipple and the gasket (see Figure 1).
2. Place the O-ring into the barometer groove.
3. Attach the PTB210 to the SPH20 with two fixing screws.
CONNECTION TO OTHER BAROMETERS
Connect the barometer to the threaded nipple (Figure 1) by using
a flexible, airtight tube with an inner diameter of 4 mm. To prevent condence water accumulation in the tube, make sure the entire length of the tube goes downwards from the barometer to
SPH20.
Figure 1 SPH20 Installation
Figure 2 PTB210 Barometer Connection
QUICK CONNECTOR WIRING input (+): terminals 1 and 2 input (-): terminals 3 and 4
Always connect both inputs!
For warranty information, visit our Internet pages at: www.vaisala.com/warranty.html
TECHNICAL DATA
Materials
Plates
Bars
Connection box
Polycarbonate
Offshore Aluminium
Polycarbonate (IP65)
Mounting
Hose connection
2 bolts (M6 x min 20 mm) barbed fitting for 4 mm I.D. hose or Rp1/4 thread
Power supply
Temperatures at which the heating turns ON/OFF
ON
OFF
(possibility for own heating control as well)
Power consumption during heating
Operating temperature
HEATING CONTROL
12 V (default)
24 V (with changed wiring)
+4 C ( 3 C)
+13 C ( 3 C) about 70 W
-60 C...+80 C
The thermostat controlled heating elements switch on when temperature decreases down to +4 °C (42 °F). The heating switches off when temperature increases up to +13 °C (55 °F).
If an own heating control is needed, the thermostat can be shunted as follows:
1. Open the electrical enclosure cover
2. Remove the connecting board (Figure 3) by unscrewing the
3 screws.
3. Detach the wires from the thermostat.
4. Join the detached wires.
5. Replace the connecting board and close the cover.
CAUTION Surface temperature of a heated plate can be
60 C (140 F)!
Visit our Internet pages at
MAINTENANCE
To clean the plates, blow pressurized air to the opening between the plates. www.vaisala.com
Figure 3 Connecting Board
CHANGING THE POWER SUPPLY WIRING
To change the power supply wiring from 12 V to 24 V:
1. Open the electrical unit enclosure.
2. Disconnect white and brown wires from the + terminal (12
V).
3. Disconnect blue and black wires from the - terminal (12 V).
4. Connect the white and brown wires to + terminal (24 V).
5. Connect the blue and black wires to - terminal (24 V).
WARRANTY
Visit our Internet pages for standard warranty terms and conditions: www.vaisala.com/warranty .
TECHNICAL SUPPORT AND PRODUCT
RETURNS
For technical questions, contact the Vaisala technical support by e-mail at [email protected]
.
If the product must be returned for service, see www.vaisala.com/returns .
For contact information of Vaisala Service Centers, see www.vaisala.com/servicecenters .
DIMENSIONS
All dimensions in mm.
