Detector

while watching the indicator and comparing the read-

The alarm circuit takes the place of many routine

checks, since failure of the synchro signal amplifier

ings, you can determine if there is a problem with a

output to follow the input or loss of input excitation

detector. Every 90 days and after exposure to high

automatically completes the alarm circuit. The only

winds, inspect the detector mounting and tighten the

routine checks that are required are a monthly check of

mounting bolts if necessary. The rotor and vane also

the alarm circuit and yearly inspection of the gearing.

should be inspected every 90 days. Turn the rotor by

When inspecting the gearing, if dirt is found, clean

hand to confirm that it turns freely. Rotate the vane

the gears. If a gear shows excessive wear, replace it.

through 360 in both directions to assure it rotates freely.

Turn the gears manually, with the equipment de-

If friction or binding of the vane is suspected, perform

energized, noting whether the gears mesh smoothly.

the friction test. Every 6 months, the detector should be

Under normal conditions, the synchro signal

inspected, lubricated, and, if conditions warrant,

amplifier will require no lubrication. All rotary devices,

cleaned. Refer to the technical manual for specific pro-

such as synchros, gear teeth, ball bearings, and so on,

cedures.

are factory lubricated for the life of the equipment.

TRANSMITTER

TROUBLESHOOTING ANEMOMETER

SYSTEMS

Every 6 months, the transmitter should be inspected,

Troubleshooting wind direction and indicating

lubricated, and, if warranted, cleaned. When inspecting

systems is simple once you have identified that you have

the transmitter, you should inspect the following:

a problem. Many potential problems can be avoided by

careful preventive maintenance. If the trouble is not

All moving parts for freeness.

avoided, you can at least identify it by following the

Planned Maintenance System (PMS) procedures. The

Gears for excessive wear and broken teeth.

principles of operation of the various components of the

systems were included in this chapter to aid you in

Bearings, gears, and other moving parts for

troubleshooting.

gummed oil, dust, and so on.

When troubleshooting the systems, you should refer

to the troubleshooting tables given in chapter 4 of the

Sensitive switches; turn them over and replace if

technical manual Operation and Maintenance Instruc-

worn.

tion - Wind Indicating Equipment, Type F, NAVSHIPS

0965-108-9010. These troubleshooting tables can be

Driving discs for wear.

very useful in that they enable personnel to locate mal-

functions and take the necessary corrective action. They

are also a quick reference guide.

INDICATOR

MAINTENANCE OF ANEMOMETER

Watch the indicator periodically for uneven

SYSTEMS

movement of the pointer as this indicates a possible

problem. By comparing the pointer movement of one

Preventive maintenance for the system consists of

indicator with another, you can determine if the trouble

periodic inspections, cleaning, and lubrication. You

should refer to the appropriate technical manual for

is in a single indcator or in the system. Erratic indica-

specific procedures to follow. Many potential troubles

tions, resulting from excessive friction, often can be

in the system can be avoided by careful preventive

avoided by cleaning and oiling of the units. Other causes

maintenance.

of excessive friction may be discovered during periodic

maintenance inspection. When beginning a periodic

DETECTOR

inspection, observe the indicators when there is enough

wind to act on the vane and rotor. The indicator requires

Most ships have a detector mounted port and star-

no lubrication.

board on the mast. By switching from one to the other

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