Ceilometer CT25K
CT25K-U059en-2.1 User’s Guide
35
FEDCBA98 Alarm (A), Warning (W), and internal status information. Each character
is a hexadecimal representation of four bits, altogether 32 bits (b00-b31),
with the following breakdown. Interpretation as follows:
F: b31 Laser temperature shut-off (A)
b30 Laser failure (A)
b29 Receiver failure (A)
b28 Voltage failure (A)
E: b27 (spare) (A)
b26 (spare) (A)
b25 (spare) (A)
b24 (spare) (A)
D: b23 Window contaminated (W)
b22 Battery low (W)
b21 Laser power low (W)
b20 Laser temperature high or low (W)
C: b19 Internal temperature high or low (W)
b18 Voltage high or low (W)
b17 Relative Humidity is > 85 % (option) (W)
b16 Receiver optical cross-talk
compensation poor (W)
B: b15 Blower suspect (W)
b14 (spare) (W)
b13 (spare) (W)
b12 (spare) (W)
A: b11 Blower is ON
b10 Blower heater is ON
b09 Internal heater is ON
b08 Units are METERS if ON, else FEET
9: b07 Polling mode is ON
b06 Working from battery
b05 Single sequence mode is ON
b04 Manual settings are effective
8: b03 Tilt angle is > 45 degrees
b02 High background radiance
b01 Manual blower control
b00 (spare)
For example, if the battery voltage is too low, the internal heater is on and
units are meters, a warning is given and the second line appears as
0W ///// ///// ///// 00400300.
3RD LINE
L↵ End-of-Text and CRLF
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