Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
65
Technical Information
Processor 16-Bit 80C188EB, Intel
Clock Speed 24 MHz (12 MHz Bus)
Memory
FLASH EEPROM 640 kB
STATIC RAM 256 kB
1 MB continuous memory addressing
A-to-D Converter ± 12 Bit
Accuracy 0.05 % of FSR
Speed 200 µs / Conversion
Gain control automatic and programmable
Full scale ranges ± 2.5 V, ± 250 mV, ± 25 mV,
± 7.5 mV
Filtering by Hardware, Software or both
Serial Communication Ports
Multistandard Ports 2 configurable ports to comply with:
RS-232D, RS-422, RS-423, and RS-
485 or MIL-STD-188-114 standards
Data Transfer Rate 110 to 19,200 baud
300 to 9600 baud used in CT25K
Programmable rate, frame, handshake
and port standard
Electrostatic Discharge Protection 8 kV per each port pin
Overvoltage protection bipolar 30 A (1 ms) TRANSZORBS
Environmental specifications
Temperature MIL-STD-810D, 501.2 & 502.2
-50 °C to +70 °C
Humidity MIL-STD-810D, 507.2
0 to 100% RH., not-condensing
Vibration IEC-68-2-6 Fc
10 - 500 Hz, up to 2.2 g
Electromagnetic compatibility IEC-801-4
Conducted emissions MIL-STD-461C, CE03
Conducted susceptibility MIL-STD-461C, CS02 (power leads)
Conducted susceptibility IEC-801-4 (fast transient burst)
Radiated Emissions MIL-STD-461, RE02
Radiated susceptibility MIL-STD-461, RS03
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