The CIP is suitable for fixed site, mobile or airborne sampling.
Photo at left: The CIP and other instruments mounted on a Russian research aircraft. Photo courtesy of the Central Aerological Observatory in Moscow. Photo at right: Columns, plates and aggregates recorded by researchers at Forschungszentrum Juelich.
The CIP offers comprehensive particle data:
You can customize the CIP with several optional features:
Two optional software packages are available for CIP users. The Particle Analysis and Display System (PADS) allows for instrument control and real-time data display.
The second software package, the Optical Array Shadow Imaging Software (OASIS), facilitates post-processing particle analysis. More information about these two packages is given below.
PADS displays a user-friendly virtual instrument panel that enables the user to do the following tasks:
OASIS, shown at right, is designed for rigorous post-processing analysis. It provides additional particle statistics beyond those generated by PADS. In addition, OASIS allows users to filter particles by various criteria, including particle area, particle shape, area fraction, and inter-arrival time. Written in IGOR Pro, OASIS leverages IGOR’s robust statistical analysis features for enhanced data analysis and graphing capability.
Shadow images of particles passing through a collimated laser beam are projected onto a linear array of 64 photodetectors. The presence of a particle is registered by a change in the light level on each diode. The registered changes in the photodetectors are stored at a rate consistent with probe velocity and the instrument’s size resolution. Particle images are reconstructed from individual “slices,” where a slice is the state of the 64-element linear array at a given moment in time. A slice must be stored at each time interval that the particle advances through the beam a distance equal to the resolution of the probe. Optional grayscale imaging gives three levels of shadow recording on each photodetector, allowing more detailed information on the particles.
The CIP also contains a Hotwire LWC sensor. This sensor estimates liquid water content using a heated sensing coil. The system maintains the coil at a constant temperature, usually 125 °C, and measures the power necessary to maintain this temperature. More power is needed to maintain the temperature as droplets evaporate on the coil surface and cool the surface and surrounding air. Hence, this power reading can be used to estimate LWC. Both the LWC design and the optional PADS software contain features to ensure the LWC reading is not affected by conductive heat loss.
|Parameter||CIP Specification||Specification for Included Hotwire LWC|
|Technique||Optical Array Probe with 64 elements: 62 sizing elements, end diode rejection||Temperature-Controlled Hotwire Sensor|
|Measured Particle Size Range||12.5 µm – 1.55 mm (for 25-µm resolution CIP)
7.5 – 930 µm (for 15-µm resolution CIP)
|N/A; measured LWC range is 0 - 3 g/m3|
|Sample Area||Variable; depends on tip configuration and particle size||N/A|
|Upper Concentration Range:||Depends on particle size, but up to 500 particles/ cm3 for a CIP with standard tips and arm width||3 g/m3|
|Air Speed Range||10 – 300 m/sec (for 25-µm resolution CIP)
10 - 180 m/sec (for 15-µm resolution CIP)
|10 – 200 m/sec|
|Number of Size Bins||62||
|Sampling Frequency||1D histogram data: 0.05 to 25 Hz; 2D image data: variable interval, when buffer fills|
|Laser||658 nm, 30 mW|
|Calibration Verification:||Spinning glass disk with opaque dots of known size||Not required|
|Auxiliary Parameters||Ambient Temperature, Relative Humidity, Static Pressure, Dynamic Pressure|
|Data System Interface:||2D CIP data: RS-422, High Speed, 4 Mb/sec Baud Rate
System data: RS-232 or RS-422, 56.6 kb/sec Baud Rate
|Optional Software:||Particle Analysis and Display System (PADS)
Optical Array Shadow Imaging Software (OASIS)
|Weight:||21 lbs./9.5 kg in DMT canister|
|Power Requirements||28VDC: 11A for probe system, anti-ice heaters either 13A (standard tips) or 17A (Korolev tips)
Optional AC voltages for system power and anti-ice heaters
|Environmental Operating Conditions||Temperature: -40 °C to +40°C (-40 °F to +104 °F)
RH: 0 – 100%, non-condensing
Altitude: 0 - 50,000 ft
|Routine Maintenance:||DMT recommends conducting basic instrument performance checks and inspecting the CIP optical windows before a flight. A weekly calibration check is also recommended.|
Specifications are subject to change without notice.
Contact DMT for pricing or more information.
Phone: +001 303 440 5576
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