CS800-L CLIMATRONICS WIND SPEED AND DIRECTION SENSOR
5
3 month:
•
Measure bearing torque to determine if
bearings need replacement (unless
bearings are being replaced on a periodic
schedule). For a 1 mph starting threshold,
bearing torque should not exceed 0.28 g-
cm for the anemometer, and 6.0 g-cm for
the vane.
If bearing torque is measured, starting
threshold can be computed using the
following equation:
u = (T/K)
1/2
where:
u = wind speed (m/sec)
T = torque (g-cm)
K = is a constant for the
aerodynamic shape (g)
K = 1.4 for the anemometer
K = 30.0 for the vane
12 month:
•
Replace anemometer bearings.
•
Check vane linearity.
24 month:
•
Replace vane bearings.
Bearing replacement based on torque
measurements has advantages in that: 1) the
bearings are only replaced when necessary, 2)
a history of bearing life is established, and 3)
the starting threshold of the sensor can be
determined. Torque watches for measuring
bearing torque are available from the
manufacturer (Climatronics 516/567-7300), for
approximately $1100 (2 required).
7. TROUBLESHOOTING
7.1 WIND DIRECTION
-99999 or random negative numbers displayed
in input location
a.
Make sure the battery voltage is
between 9.6 and 16 VDC.
b.
Verify the sensor is wired to the Single-
Ended input channel specified by
parameter 3 of Instruction 4 (Single-
Ended channels are numbered
sequentially starting at 1H, i.e., 1L is
Single-Ended channel 2).
c.
Make sure parameter 2 of Instruction 4
is 5.
0.0000 or slightly negative numbers displayed in
input location
a.
Make sure the execution interval has
been entered in the program table.
b.
Verify the sensor is wired to the
excitation channel specified by
parameter 4 of Instruction 4.
Parameter 6 should be 2500 for the
CR10, 5000 for the 21X/CR7.
7.2 WIND SPEED
Unreasonable results displayed in input
location:
a.
Inspect the sensor for damage or
contamination
b.
Check that the multiplier and offset in
Instruction 3 are correct for the desired
engineering units.
Offset only displayed in input location:
a.
Make sure the sensor is properly wired
to the 5V and G terminals on the CR10,
or to the CAO port and ground on the
21X or CR7 dataloggers. When using
the CAO port, Instructions 30 and 21
should precede the sensor
measurement instructions, and
executed each time through the
program table. Verify 5V is present on
the 5V terminal or CAO port using a
voltmeter.
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