R.M. Young 32500, Instructions Manual

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32500-90(U)
MODEL 32500
ELECTRONIC COMPASS
WITH SERIAL INTERFACE
SPECIFICATIONS *
Compass:
Resolution: 0.5 degrees
Accuracy: ±2 degrees (rms)
Wind Speed Input:
Sensor Type: AC Frequency Generator
Sensitivity: 50mV p-p at 10Hz
Range: 0-2000 Hz
Wind Direction Input:
Sensor Type: Potentiometer
Range: 0-5000mV = 0 to 355 degrees
Excitation: 5000mV (limited to 5 mA)
Voltage Inputs (Auxiliary Sensor Inputs):
Resolution: 12-bit
VIN1 and VIN2 0-1000mV
VIN3 and VIN4 0-5000mV
Voltage Outputs:
OUT1 0-5000mV 0-100 m/s wind speed
OUT2 0-5000mV 0-360° true wind direction
Serial Output: Full duplex RS-232,
Half duplex RS-485 (2 mS turnaround)
1200, 4800, 9600, 19.2K, & 38.4K baud
8 data, 1 stop, no parity
Operating Temp: -50°C to 50°C
Power: 11 to 30 VDC, 40 mA
Mounting: 1 inch IPS (1.34 inch actual diameter)
Size: 9.50” (24.1cm) H
2.83” (7.2cm) W
3.82” (9.7cm) D
*
Specifications subject to change
1.0 INTRODUCTION
The Model 32500 ELECTRONIC COMPASS measures magnetic
heading, wind speed and direction signals from YOUNG sensors,
and signals from four general purpose voltage inputs. Wind direction
input may be combined with the direction input to obtain true direction.
Voltage inputs may be used with YOUNG temperature and humidity,
barometric pressure, precipitation, or other sensors. These input
signals are converted into scaled values and placed on a serial string,
which is output at up to 15 hertz.
Measurements are available in several formats in either full duplex
RS-232 or half-duplex RS-485 signals. Both continuous and polled
serial outputs are available. When polled, up to 16 units can be
networked together. For marine applications the 32500 produces
standard NMEA serial output sentences. Calibrated voltage outputs
for wind speed and direction are also provided when the 32500 is
connected to a YOUNG wind sensor.
2.0 INSTALLATION
The 32500 is supplied in a weather-resistant enclosure with a mounting
adapter that fits 1 inch IPS pipe (1.34 inch nominal diameter). When
used with the YOUNG Wind Monitor or 86xxx series Ultrasonic
Anemometer the mounting adapter engages with the sensor
orientation notch. Refer to the WIRING DIAGRAM for electrical
connection details and jumper settings.
It is important to install the 32500 so it remains level during operation.
This becomes increasingly important when used at northern and
southern latitudes far from the equator since progressively more of
the earth’s magnetic flux becomes vertical. By keeping the 32500
level at these latitudes, the measurements will be free of the vertical
flux influence and remain accurate.
If possible, avoid installing the compass near magnetic devices or
machinery. After installation, the compass must be calibrated to correct
for local magnetic conditions. If the compass is moved or its local
environment changes significantly (machinery moved), the compass
should be calibrated again.
3.0 OPERATION
Operation begins automatically when power is applied. Jumper
settings configure the 32500 for common output formats as well as
output type. Input signal connections are dependent upon the serial
output format and input type selected.
3.1 JUMPER CONFIGURATIONS
W1 JUMPERS A, B, and C, determine serial output format. Jumper
configurations and associated output format are listed below:
1 signifies that jumper is installed, 0 signifies that jumper is omitted.
See the SERIAL FORMAT DIAGRAM for more details.
A B C
SERIAL OUTPUT FORMAT (Baud Rate, Output Rate)
0 0 0 ASCII Ouput (9600, 2Hz)
0 0 1 Polled ASCII (9600)
0 1 0 NMEA1 (4800, 2 Hz)
0 1 1 NMEA2 (4800, 2 Hz)
1 0 0 RMYT (9600, 15 Hz)
1 0 1 PRECIP (9600, 15 Hz)
1 1 0 PRECIP POLLED (9600)
1 1 1 SOFTWARE Mode (set by user, see section 4.2)
ASCII and POLLED ASCII are general purpose outputs that may
be used with the YOUNG 26800 or devices that can communicate
serially.
NMEA1 and NMEA2 outputs are generally for marine applications.
NMEA1 produces a “$WIMVW” string containing speed and direction
values.NMEA2 produces both a “$WIMVW” and “$WIXDR” string,
the latter containing temperature, humidity and pressure values.
RMYT is a binary format for use with the YOUNG Wind Tracker.
PRECIP and PRECIP POLLED configure VIN4 as a special input to
count tipping bucket precipitation gauge switch closures. (Requires
a 10K ohm resistor from VIN4 to EXC terminal.)
SOFTWARE mode allows output format and other parameters to
be set using serial commands. Please see section 4.0 SERIAL
COMMUNICATION and the SERIAL FORMAT DIAGRAM for more
information.
W2 & W3 JUMPERS determine output connection type. Only one
connection type may be used at a time. Please refer to the WIRING
DIAGRAM for jumper location and connection details.
JUMPERS OUTPUT TYPE
VOUT
Calibrated output for wind speed and direction
OUT1 0-5000mV = 0-100 m/s Wind Speed
OUT2 0-5000mV = 0-360 degrees Wind Direction
232 RS-232 full duplex serial
485 RS-485 half duplex serial