The TMET weather transmitter interfaces digitally with the Vaisala WXT536 weather sensor or or WXT532 Vaisala wind speed sensor. The Vaisala WXT536 weather sensor supplies the following parameters:
The transmitter also has inputs for a thermistor temperature sensor and a pyranometer input for the Kipp and Zonen CMP3 or Skye SKS1110. The pyranometer channel provides Global (Total) and Diffuse irradiance in W.m-2.
TMET cannot provide wind gust data or sunshine hours.
The TMET and the Vaisala weather sensors are both low power devices, allowing the system to be powered by any of the following: Solar power The built in rechargeable battery and solar regulator used together with a 9W solar panel provides up to 5 days of continuous operations in the absence of significant sunlight (based on a transmitter interval of 5 minutes). AC power supply Use with a Eltek power supply type MP12U (mains input voltage 100/250V ). The internal rechargeable batteries provide several days of power should the AC supply fail. External 12V battery E.g. Yuasa sealed acid battery (12AH). Provides up to 3 weeks operation. Note: the above power options are not suitable for use with the Vaisala weather sensor if the de-icing option is required.
The TMET is rated for indoor use only. If to be used outdoors, the TMET must be housed in a secondary enclosure. The outdoor unit type WBT is available for this purpose. The WBT is intended for mounting on a 25mm lightweight aluminium pole.
Supplied with key-lock door and galvanised clamp for use on the 25mm dia pole. (The pole is not supplied).
Dimensions: 200 x 300 x 132mm
10W solar panel supplied with 25mm dia pole mounting bracket and lead. Charge rate is 1A max.
The bracket fitted provides fixed inclination of 30 degrees and is optimised for latitude 52 degrees north. For extremes of latitude an alternative bracket may be required.
This kit enables fitment of the transmitter's built-in wall bracket to difficult or uneven surfaces. The kit provides additional docking security.
The following products are supported:
|TMET||1 x u type thermistor input||-50 to 150°C||0.05°C (-5 to +75°C)
0.1°C (-25 to +100°C)
0.2°C (-40 to +125°C)
|±0.1°C (-5 to +75°C)
±0.2°C (-25 to +100°C)
±0.4°C (-40 to +125°C)
|1 x voltage input for use with external device e.g. solarimeter types Kipp and Zonen CMP3 or Skye SKS1110||0-50mV||0.025%||0.1%|
|1 x serial input for connection to Vaisala WXT536 or WXT532||The TMET transmitter interfaces digitally with the Vaisala WXT536 to derive:
Wind direction: 0-360°
Barometric pressure: 600-110hPa
Air temperature: -52°C to 60°C
Relative Humidity: 0-100%rh
|Frequency:||Default is 434.225Mhz (other frequencies are available)|
|Tx output power:||10mW ERP|
|Useable Tx interval:||typically 10 seconds to 15 minutes|
|Size:||120 x 120 x 55mm (excluding antenna)|
|Connection strip:||Standard 5mm pitch rising cage connector (included)|
|Antenna "TMET":||Supplied compressed spring, L=70mm, modified SMA base|
|Antenna connector:||SMA socket is mounted on the TMET|
|Fixing:||4 x 4mm dia holes (fixing screws are NOT provided)|
|Battery type:||customised (7.2v) 2.3Ah Ni-mH with built in temperature sensor|
|Battery endurance:||typically > 5 days if battery fully charged and with Vaisala connected|
|Charging time:||Using MP12U: typically 8 hours from discharged
Using SPTMET typically from discharged 1 day of full sun.
|Max lead length to any connected sensor is 10m.|
|Compliant to EN300-220:||-10 to +55°C|
|Actual:||-30 to +65°C|
|Humidity:||100% non condensing|
|Dimensions (footprint):||78 x 41mm|
|Transmission interval range:||1 sec to 4 hours|
|Indicator (red LED):||transmit active/on/off|
|Control switch (concealed):||test mode / hibernate|