21Instruction Manual - CVF45. Specification355 mm 230 mm154.5 mm129.5 mmSpecificationsCompatible instrumentsCompliance with standardsPower consumption ventilator (unheated)Power consumption heater (selectable)Operational voltage rangeOperational temperature range -40 °C to +70 °CStorage temperature rangeHumidity rangeIngress Protection (IP) ratingNote: The performance specifications quoted are worst-case and/or maximum valuesCMP 6, CMP10, CMP 11, SMP11, CMP 21, CMP 22, CGR 4, CUV 5CMP 3, SMP3 and CGR 3 with reduced specificationsOlder type single radiometers: CM, CG and CUV will also fitISO/TR 9901, BSRN operations manual5 W continuously at 12 VDC5.5 W at 12 VDC8 to 13.5 V-40 °C to +70 °C0 to 100 % non-condensingTacho output Two tacho pulses (5 Volt) per revolution, 8800 pulses per minute (nominal), 146 HzOptional cable lengths 25 m and 50 mZero offset A reduction 50% reduction for CMP’s54Standard cable length 10 mIncrease of air temperature 0.25 K at 0 W heating1 K at 5.5 W heatingOffset by heating -2 W/m 2 at 5.5 W heating (CMP 11), no offset for CGR pyrgeometersCable resistance 0.16 Ω/m (2 x 0.08 Ω/m)Voltage drop at maximum heating 0.075 V/mSize 0.23 m diameter, length 0.355 mAdvantages Easier filter accessNo build-up of snow under ventilator (hangs over mounting platform/located higher)Easy removal of coverBecause of radial ventilator, 5x better circulation of air over the top of the domeLower power consumption for both ventilator and heater with improved performanceWide operating voltage rangeHigh quality cable with very low voltage dropKipp & Zonen reserves the right to make changes to specifications and other product documentation without prior notice.5.1 Optical and electrical5.2 Dimensions and weightWeight without cable: 1.6 kg