The Signet MK 24 Windpoint is a very reliable wind direction indicator., both for racing and cruising boats. It is the product of several years of develop ment by marine instrument specialists and is designe ''''~Rd and built for effective and efficient service. It is designed for use with the MK 23 "0 Adjust" Close Hauled Indicator.
UNPACKING INSTRUCTIONSBecause the Windpoint is a precision electronic instrument, care should be taken in unpacking it. You will find the following items:
Meter Unit Installation
After selection of the meter location, proceed as follows
Note that windpoint operation can affect a closely mounted compass.
1. Cut a 4-5/8 inch diameter hole in the bulkhead.
2. Remove the clamp ring. Install the three screws.
3. Install the indicator with a non-hardening bedding compound or sealant around the rear of the bezel.
4. Install the clamp ring on the case from the rear as shown in rig. 1. With the meter indicator flange against the bulkhead,, position the clamp close to the rear of the bulkhead. Tighten the clamp securely. Turn the three bracket screws clockwise against the bulkhead until the indicator flange is seated on the bulkhead. Do not overtighten; this will cause the clamp to slip.
5. Connect the power (Requires 12 VDC @ 0.1 AMP) and other cables except the cable to the masthead as shown in Fig. 2, 3. or 4. The Figure used depends on complexity of your system. If you are using a Windpoint Repeater as shown in Fig. 3 or a Close Hauled Repeater as shown in Fig. 4., the required Repeater Cable should be included with the repeater. Extension cables can be obtained through your local dealer.
As an initial check., plug the masthead unit directly into the indicator and check for proper operation as the masthead sensor is rotated.
6. It is recommended that the lights be connected to a 12 volt source through a switch or dimmer. Uses 2 each 161R Bulb., total current drain 0.4 AMPS at 12 VDC.
Masthead Unit Installation1. Select a location on the top of the mast that will permit the staff to point aft as shown in Fig. 7. Masthead can be mounted pointing forward, however it is then not visable from the helm and is more subject to sail damage,
CARE AND MAINTENANCE
We have intentionally constructed the Signet Windpoint for trouble-free operation. It is very important not to dismantle your Windpoint meter unit. If a question should arise, your inquiry will be answered promptly by technicians at Signet or your local dealer.
CALIBRATION AND ADJUSTMENT1. Turn on power to the instrument.
The indicator has a built-in masthead signal which, with the masthead unplugged, forces a reading on both the Windpoint and MK 23 Close Hauled of between 100 port and 400 starboard. It is recommended that these readings be checked and recorded after initial installation and alignment as a future reference on indicator correct operation.
The indicator may be checked with or without a mast head unit. Rotate the masthead through the various positions and note the response of the indicator. Indicator positions should be the same as the vane positions. Incorrect readings can indicate an open lead/s or bad amplifier sections in the indicator. If an amplifier or lead is bad, refer to the windpoint schematic and trace the problem, using the vane as a convenient source of 0 to 6.8 volts to the amplifier sections. The voltage on the coil leads should be the same as the input voltage with Pin 5 to #8 on coil, Pin 6 to #9 on coil, and Pin 7 to #10 on coil.
Masthead and Cable
If you cut the cable from the Windpoint Indicator to the mast unit to remove the mast and/or are having instrument readout problems, it is important you make a resistance check of the cable and masthead assembly after reconnecting the wires. Unplug the cable from the Windpoint Indicator or Repeater cable, if you have one. The indicator readings should be as recorded previously. With an ohmmeter, check across the cable connector pins for the following readings.1. Pin 1 to Pin 2 - 1250 ohms.
Masthead - Indicator Voltage Checks
With both the masthead unit and indicator plugged in and with 12 volts to the indicator, you can check the signals to and from the masthead unit at a mast base junction box.
Use Pin 2 (orn) as the (-) reference and a 10 to 15 volt voltmeter, the voltage readings should be
to Pin 1 (Blk) 6.8 volts + - 10% independent of vane
to Pin 5 (Red) 6,8 volts, vane at 30° port forward to 0 volts at 150° port
to Pin 6 (White) 6.8 volts at 90° starboard, 0 volts at 900 port
to Pin 7 (Green) 6.8 volts at 150° port, 0 volts at 30° starboard
Incorrect voltages can indicate a problem in either the indicator or masthead unit. Disconnect the masthead unit and recheck the voltages
to Pin 1 (Blk) 6.8 volts
to Pins 5, 6, or 7 about 3 1/2 volts
0 or 7 volts indicates a possible amplifier failure.
Oil Leakage from Masthead
Storage or shipment of the masthead on its side or upside down may allow oil seepage from the damping assembly. The oil seepage will not bother the operation if it is cleaned off the outside and does not collect between the staff and dust shield. The damping assembly prevents fluttering in very light winds.