Specifications

Compatible instruments

• SR20, SR20-D2, SR22, SR25, SR25-D2, IR20, IR20WS

Compliance with standards

• ISO/TR 9901, BSRN operations manual

Rated operating power

• 7.8 W at 12 VDC (unheated)

Rated operating voltage range

• 10.8 to 13.2 V

Rated operating temperature range

• (-40 to +70) °C

Fan status signal

• available (optional use)

Heater

• 5 and 10 W at 12 VDC (optional use)

Increase of air temperature

• 0.5 °C at 0 W heating, 1.0 °C at 5 W heating, 1.5 °C at 10 W heating

Zero offset a SR20 ventilated

• 2.5 W/m² at 0 W heating

Offset SR20 by heating

• -2 W/m² at 5 W heating and -4 W/m² at 10 W heating

Offset IR20 by heating

• 0 W/m² at 5 W heating and 0 W/m² at 10 W heating

Cable resistance

• 0.3 Ω/m (2 x 0.15 Ω/m)

Voltage drop at 10 W heating power

• 0.12 V/m

Footprint diameter

• 0.17 m

Standard cable length

• 5 m (see options)

Options

• longer cable, in multiples of 5 metres (please note the voltage drop of cabling)
• pack of 5 filters (VU01F)