Vaisala CL31 User Manual

Chapter 5 ________________________________________________________________ Operation
VAISALA_______________________________________________________________________ 75
Example:
NSB H
1
H
1
H
1
H
1
H
1
T
1
T
1
T
1
T
1
T
1
H
2
H
2
H
2
H
2
H
2
T
2
T
2
T
2
T
2
T
2
S
1
S
2
S
3
S
4
S
5
S
6
S
7
S
8
S
9
S
10

where
N = 0 No significant backscatter (clear air)
1 One layer detected
2 Two layers detected
3 Sky is fully obscured but no cloud base can be detected
from echo signal received (e.g. fog or precipitation)
4 Sky is partially obscured and no cloud base is detected
S = 0 No CL31 alarm is active
1 Alarm is active
B = Space if S = 0
‘bel’ character if S = 1. Because 'bel' is a nonprinting
character, the alarming line appears one character shorter
in a printout than normally.
N = 0 / 4H
1
=H
2
=T
1
=T
2
= /////
1 / 2H
1
H
1
H
1
H
1
H
1
= The lowest detected cloud height in 5
digits. Leading zeroes not suppressed.
T
1
T
1
T
1
T
1
T
1
= Range of backscatter of first layer, ///// if
not defined
2 H
2
H
2
H
2
H
2
H
2
= Second cloud height, ///// if not defined
T
2
T
2
T
2
T
2
T
2
= Range of backscatter of second layer, ///// if
not defined
3 H
1
H
1
H
1
H
1
H
1
= Calculated vertical visibility
T
1
T
1
T
1
T
1
T
1
= Signal range, that is, height of highest
detected backscatter
S
1
= An alarm or a warning is active
S
2
= Voltage alarm
S
3
= Transmitter alarm or transmitter expires warning
S
4
= Transmitter shutoff alarm (Laser temperature too high)
S
5
= High radiance warning
S
6
= Blower On
S
7
= Heater On
S
8
= 0 Unit is feet
1 Unit is meters
S
9
= 0 Always (Data type in internal table. N/A)
S
10
= 0 Always (Fast Heater Off is active. N/A)

Vaisala CL31 Specifications

General

Brand	Vaisala
Model	CL31
Category	Measuring Instruments
Language	English