Garmin 16-HVS User Manual

Garmin 16-HVS GPS Receive

Revision: 1/07

Campbell Scientific, Inc.

WARRANTY AND ASSISTANCE

This equipment is warranted by CAMPBELL SCIENTIFIC (CANADA) CORP. (“CSC”) to be free from defects in materials and workmanship under normal use and service for

twelve (12) months from date of shipment unless specified otherwise. ***** Batteries are not warranted. ***** CSC's obligation under this warranty is limited to repairing or

replacing (at CSC's option) defective products. The customer shall assume all costs of removing, reinstalling, and shipping defective products to CSC. CSC will return such products by surface carrier prepaid. This warranty shall not apply to any CSC products which have been subjected to modification, misuse, neglect, accidents of nature, or shipping damage. This warranty is in lieu of all other warranties, expressed or implied, including warranties of merchantability or fitness for a particular purpose. CSC is not liable for special, indirect, incidental, or consequential damages.

Products may not be returned without prior authorization. To obtain a Return Merchandise Authorization (RMA), contact CAMPBELL SCIENTIFIC (CANADA) CORP., at (780) 454-2505. An RMA number will be issued in order to facilitate Repair Personnel in identifying an instrument upon arrival. Please write this number clearly on the outside of the shipping container. Include description of symptoms and all pertinent details.

CAMPBELL SCIENTIFIC (CANADA) CORP. does not accept collect calls.

Non-warranty products returned for repair should be accompanied by a purchase order to cover repair costs.

Garmin 16-HVS GPS Receiver Table of Contents

PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat® bookmarks tab for links to specific sections.

1. Overview.......................................................................1

2. Wiring............................................................................1

3. GPS Data ......................................................................4

4. CRBasic Programming................................................ 5

4.1 Read GPS Data .........................................................................................5

4.1.1 SerialOpen.........................................................................................5

4.1.2 SerialIn ..............................................................................................5

4.1.3 SerialFlush.........................................................................................5

4.1.4 SerialClose ........................................................................................6

4.2 Parsing and Data Storage Options ............................................................6

4.2.1 SplitStr...............................................................................................6

4.2.2 Converting Strings to Floating Point Numbers .................................6

5. Troubleshooting ..........................................................8

5.1 GPS Setup and Function...........................................................................8

A. CR23X/CR10X Programs ........................................ A-1

A.1 Programming ...................................................................................... A-1

A.1.1 Program Execution Interval......................................................... A-1

A.1.2 Reading GPS Data....................................................................... A-1

A.1.3 Filters........................................................................................... A-3

A.1.4 Managing the Data ...................................................................... A-3

A.1.5 Program Discussion..................................................................... A-4

A.1.6 Troubleshooting .......................................................................... A-8

B. CR9000(X) Program Example................................. B-1

C. Specifications.......................................................... C-1

C.1 Replacement Parts................................................................................C-1

C.2 Specifications.......................................................................................C-1

D. Garmin 16-HVS Setups ........................................... D-1

Garmin 16-HVS GPS Receiver Table of Contents

Figures

1. Garmin 16-HVS GPS Receiver, Part Number 17215 ................................ 1

2. RJ45 with Flying Leads, Part Number 17217............................................ 2

3. CR1000 to GPS16-HVS Using the 17217 Adapter ................................... 2

4. RJ45 to DB9 Serial Adapter, Part Number 17218 ..................................... 3

Tables

2-1. Wiring the RJ45 Connector with Flying Leads ...................................... 2

2-2. Wiring without the RJ45 Connector (Garmin Wiring)........................... 3

2-3. RJ45 to DB9 RS-232 Adapter ................................................................ 3

3-1. NEMA $GPGGA String Definition........................................................ 4

A-1. P15 for NEMA $GPGGA Data String............................................... A-1

A-2. Filter................................................................................................... A-3

D-1. PGRMC Setup Sentence.................................................................... D-2

D-2. PGRMO Output Sentence Enable/Disable ........................................D-2

D-3. Supported NMEA 0183 Sentences Order and Size ........................... D-3

D-4. $DGPGGA Global Positioning System Fix Data .............................. D-3

Garmin 16-HVS GPS Receiver

FIGURE 1. Garmin 16-HVS GPS Receiver, Part Number 17215

1. Overview

The Garmin16-HVS is a complete GPS receiver manufactured by Garmin International, Inc. The Garmin16-HVS has been configured by Campbell Scientific, Inc. (CSI) to work with CSI dataloggers.

The CR1000, CR3000, CR800, and CR850 dataloggers use serial input instructions and string handling functions to read, parse and store GPS data. The CR10X, CR23X, and other dataloggers that support P15 or the SDM-SIO4 four channel serial interface can be used with the Garmin16-HVS. The CR510 and CR200-series do not support serial data input. See Appendix A for information regarding the CR10X, CR23X, CR5000, CR9000(X) and SDMSIO4 applications.

2. Wiring

The Garmin16-HVS includes the GPS receiver and antenna in the same housing with one cable for the power supply and communications. The GPS antenna must have a clear view of the sky. Generally the GPS antenna will not work indoors.

The Garmin16-HVS is a 12-channel GPS receiver that supports FAA Wide Area Augmentation System (WAAS) or RTCM differential GPS. Also supported is the 1 Pulse Per Second (PPS) timing signal. The cable connections provided with the Garmin16-HVS do not support differential GPS correction. The cable can be modified by the user if differential correction is required.

Wiring for the Garmin16-HVS can be done with or without the RJ45 connector. When shipped from Campbell Scientific, the Garmin16-HVS has an RJ45 connector attached to the cable end. The Garmin16-HVS can be purchased with an RJ45 adapter with flying leads, an RJ45 to DB9 RS-232 adapter, and a magnetic mount. Table 2-1 is the wiring description for the RJ45 adapter with flying leads. To use Table 2-2, the RJ45 connector must be cut off the cable.

Garmin 16-HVS GPS Receiver

If the Garmin16-HVS is to be connected to a computer for setups, an RJ45 to DB9 adapter is needed.

TABLE 2-1. Wiring the RJ45 Connector with Flying Leads

GPS-Garmin16-HVS Datalogger Connection Function

Blue 12 volts Power Orange Ground Power Ground Black Ground Remote on/off Green Data in RS232 TX out of GPS Yellow None 1 Pulse Per Second

FIGURE 2. RJ45 with Flying Leads, Part Number 17217

FIGURE 3. CR1000 to GPS16-HVS Using the 17218 Adapter

Garmin 16-HVS GPS Receiver

TABLE 2-2. Wiring without the RJ45 Connector

(Garmin Wiring)

GPS-Garmin16-HVS Pin Color Function

1 Red Power in, 6.0 to 40 volts DC 2 Black Power ground 3 Yellow Remote power on/off switch, ground for on, float

for off 4 Blue Port 1 Data in, RS232 or TTL levels OK 5 White Port 1 Data out, RS232 Levels 6 Gray PPS 7 Green Port 2 Data in, RS232 or TTL levels, DGPS input 8 Violet Port 2, Data out, RS232, reserved for future use

TABLE 2-3. RJ45 to DB9 RS-232 Adapter

Pin Color Function

NA Red Power in, 12 volts NA Black Ground NA Yellow PPS 5 NA GPS, power and remote on/off ground 3 NA GPS data in 2 NA GPS data out

FIGURE 4. RJ45 to DB9 Serial Adapter, Part Number 17218

Garmin 16-HVS GPS Receiver

3. GPS Data

$GPGGA,hhmmss,llll.lll,a,nnnnn.nnn,b,t,uu,v.v,w.w,M,x.x,M,y.y,zzzz*hh<CR><LF>

The Garmin16-HVS has several data formats available. The Garmin16-HVS is configured to output the NEMA $GPGGA time and position string. It is possible to configure the Garmin16-HVS to output other NEMA strings including the $GPVTG track made good and ground speed string. See Appendix D for details.

Sample NEMA $GPGGA data string:

TABLE 3-1. NEMA $GPGGA String Definition

Field Description

0 $GPGGA NEMA string identifier 1 hhmmss UTC of Position: Hours, minutes, seconds 2 1111.111 Latitude: Degrees, minutes, thousandths of minutes 3 a N (North) or S (South) 4 nnnnn.nnn Longitude: Degrees, minutes, thousandths of minutes 5 b E (East) or W (West) 6 t GPS Quality Indicator: 0 = No GPS, 1 = GPS, 2 =

DGPS 7 uu Number of Satellites in Use 8 v.v Horizontal Dilution of Precision (HDOP) 9 w.w Antenna Altitude in Meters 10 M M = Meters 11 x.x Geoidal Separation in Meters 12 M M = Meters. Geoidal separation is the difference

between the WGS-84 earth ellipsoid and mean-sea-

level. 13 y.y Age of Differential GPS Data. Time in seconds since

the last Type 1 or 9 Update 14 zzzz Differential Reference Station ID (0000 to 1023) 15 * Asterisk, generally used as the termination character 16 hh Checksum 17 <CR><LF> Carriage return, line feed characters.

Sample $GPGGA output strings:

Cold Start No satellites acquired, Real Time Clock and Almanac invalid: $GPGGA,,,,,,0,00,,,,,,,*66

Warm Start No satellites acquired, time from Real Time Clock, almanac valid: $GPGGA,235032.0,,,,,0,00,,,,,,,*7D

Warm Start One satellite in use, time from GPS Real Time Clock (not GPS), no position: $GPGGA,183806.0,,,,,0,01,,,,,,,*7D

Valid GPS Fix Three satellites acquired, time and position valid: $GPGGA,005322.0,4147.603,N,11150.978,W,1,03,11.9,00016,M,016,M,,*6E

If the almanac and ephemeris data are not stored in the non-volatile data, GPS acquisition time is less than 5 minutes. If only the ephemeris data are unknown, acquisition time is less than 45 seconds. If all data are known (warm start), GPS acquisition time is less than 15 seconds.

4. CRBasic Programming

CRBasic is used to write programs for the CR1000, CR3000, CR800, and CR850 dataloggers. These dataloggers use several instructions to read GPS output, which is asynchronous serial data. As shipped from Campbell Scientific, the GPS receiver will output data once a second, 1200 baud, 8 data bits, no parity, and 1 stop bit. Only the GPGGA string is output. See Section 3 for details on the GPGGA string. See Appendix D for specifics on changing the GPS receiver setups, including using higher baud rates, which the CR1000, CR3000, CR800, and CR850 support.

Garmin 16-HVS GPS Receiver

4.1 Read GPS Data

4.1.1 SerialOpen

SerialOpen is used to open the appropriate serial port, specify the baud rate, data format, etc. Any of the six serial ports may be used, but option codes 3, 4 and 5 are not used in this application. Data format is zero, TX delay is zero, buffer size should be about 2000, which is large enough to prevent the GPGGA string from overrunning the buffer before data is read by the SerialIn instruction. If memory is limited, the buffer size can be smaller.

Example: SerialOpen (com1,1200,0,0,2000)

4.1.2 SerialIn

The SerialIn instruction removes data from the buffer declared in the SerialOpen instruction and places the data in a variable of type string. Use a timeout of 20, a termination character of 13, and maximum number of characters of 100, or 1 less than the size of the destination variable. Declare a string variable of size 101 before using SerialIn.

Example: Public GPSdata as string * 101

Example: SerialIn (GPSData,com1,20,13,100)

4.1.3 SerialFlush

The SerialFlush instruction is used to clear all data from the buffer associated with the serial port.

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