Novalynx 230-601C User manual

Barometric Pressure
NovaLynx Corporation PO Box 240 Grass Valley CA 95945
DOC 230-601C IS 20210526 [phone] [e-mail]
www.novalynx.com
230-601C Barometric Pressure Sensor
The 230-601C Barometric Pressure Sensor offers unparalleled
performance and flexibility for atmospheric pressure measurement. It
combines high accuracy and low power over a wide range of pressures
and temperatures.
The sensor is protected by a weatherproof polycarbonate enclosure. The
enclosure can be wall mounted or pole mounted with the addition of the
395-A-003 Mast Mounting Hardware kit.
The standard 5-conductor cable is 25' (7.6 m) long. If additional cable is
required please specify at the time of order.
BP Sensor with Enclosure
A OUTPUT (TX)
+ PWR (7-30 VDC)
- PWR
4-20 mA SIGNAL
B OUTPUT (RX)
EARTH GROUND
GREEN
RED
BLACK
WHITE
BROWN
SHIELD
RX-B
I-OUT
REF
+ PWR
TX-A / SDI
Pressure Port
- - - - -
DWG 820-0004-01
230-601C
BAROMETRIC PRESSURE
DEFAULT OUTPUT
RANGE: 500-1100 hPa
SIGNAL: 4 to 20 mA
Consult RM Young Model 61402L instruction manual
for jumper settings to enable other options
INSULATE UNUSED WIRES
Ordering Information
230-601C Barometric Pressure Sensor, 4-20 mA output with enclosure and 25' cable
395-A-003 Mast Mounting Hardware (for use with enclosure)
330-0524 Cable 5C 24AWG Shielded, per foot

Barometric Pressure
NovaLynx Corporation PO Box 240 Grass Valley CA 95945
Phone [phone]
www.novalynx.com
Mast Mounting Bracket
(U-bolt not shown)
Polycarbonate Enclosure
90 mm

R.M. YOUNG COMPANY
2801 AERO PARK DRIVE, TRAVERSE CITY, MICHIGAN 49686, USA
TEL: [phone] FAX: [phone]
PN: 61402L-90
REV: A040819
1.0 SPECIFICATIONS
Pressure 500 to 1100 hPa standard range
Digital Accuracy* 0.2 hPa (25°C)
0.3 hPa (-40°C to +60°C)
Analog Accuracy** 0.05% of analog pressure range
Analog Temperature
Dependence** 0.0017% of analog pressure
range per °C (25°C reference)
Long Term Stability: 0.08% FS per year
*  Denedas±1standarddeviationfromNIST-traceable
pressure reference in clean, dry air. Includes non-
linearity, hysteresis, repeatability, and calibration
uncertainty.
** Definedas±1standarddeviationfromidealanalog
output. Total analog output accuracy is the root sum
square of digital accuracy, analog accuracy, and analog
temperature dependence.
Output Rate 1.8 Hz (max) to 1 per minute
Current Output 4 to 20 mA or 0 to 20 mA
12-bit resolution (1 in 4000)
Selectable pressure range: 500 to
1100 hPa (standard)
Serial Output Full-duplex RS-232
Half-duplex RS-485
SDI-12
1200 to 38400 baud
Continuous ASCII text
Polled ASCII text
NMEA
0.01 hPa resolution
Supply Voltage 7 to 30 VDC
25 mA max (4-20 or 0-20 mA mode)
1.5 mA max in SDI-12 mode
8.5 mA (RS-232 or RS-485)
Case Fiber-reinforced thermoplastic
Weight 44 g (1.5 oz)
INSTRUCTIONS
MODEL 61402L
BAROMETRIC PRESSURE SENSOR

Format Description
Continuous ASCII Text
(standard)
9600 baud
16sampleaverage
1.8 Hz output
Polled ASCII Text
9600 baud
10sampleaverage
Output when polled
Marine NMEA
4800 baud
10sampleaverage
1 Hz output
SDI-12 1200 baud
Software Output parameters determined by
software settings
See wiring configurations for more information.
In POLLED ASCII mode, the unit sends data only after
receivingapollcommand.ThepollcommandisMa!where
‘a’istheaddressvalue.Thestandardaddressis‘0’(ASCII
48)forapollcommandofM0!Pleaseseesection4.3for
details on changing the poll address.
Uponreceivingaproperlyaddressedpollcommand,theunit
immediately sends data.
4.3 SOFTWARE COMMANDS
Softwarecommandssentviaserialcommunicationmaybe
used to set operational parameters. The sensor must be
configured for serial communication and connected to a PC
orothercompatibledeviceusingaprogramlikeHyperTerm.
New settings are stored in temporary memory and
must be burned to flash with command CMD420 to be
retained.
NotethatallP1jumpers(A,B,C)mustberemovedfor
SOFTWAREformattochangebaudrate,sampleaverage
count, and output rate parameters.
Althoughthesensormayreceivecommandsatany
time, measurement output may be paused by sending
three ESC (ASCII 27) characters or CMD300 1. While
paused, COMMAND mode is indicated by a “>” prompt.
All commands must be terminated with a carriage return
CR (ASCII 13).
Use“?”tolistavailablecommandsasshownbelow.
>?
YOUNG 61402L SERIES BAROMETER
------------------------------------------------
CMD100 n OUTPUT PERIOD (0-60 sec)
CMD105 n AVG SAMPLE COUNT (0-32)
CMD110 n OUTPUT FORMAT
1=ASCII 2=POLLED 3=NMEA 4-RAW 5-DIAG)
CMD120 n MULTIPLIER (10000 = 1.0000)
CMD125 n OFFSET (hPA x 100)
CMD130 n SEA LEVEL CORRECTION (hPA x 100)
CMD140 n IOUT RANGE HI (500-1100)
CMD142 n IOUT RANGE LO (500-1100)
CMD144 n IOUT SCALE (1=0-20mA 4=4-20mA)
CMD150 c POLL ADDR CHAR
CMD 1 60 n BAUD RATE (38400,19200,9600,4800,2400,1200)
CMD300 n 1=STOP, 2=RUN
CMD310 n FORCE IOUT (0-20000 FULL SCALE)
CMD400 n 1=REPORT TEXT, 2=REPORT CODE ONLY
CMD410 GET CAL TABLE
CMD420 STORE SETUP PARAMETERS
>
CMD100 n sets output period in seconds. When set to zero,
the output rate is 1.8 per second.
CMD105 n setstheaveragesamplecount.Highersample
count yields more stable readings but will
lengthen the startup delay.
CMD110 n sets output format.
CMD120 n sets the output multiplier. 10 00 0 repres en ts
1.0000
CMD125 n sets the output offset in hPa x 100
CMD130 n setsthesealevelcorrectioninhPax100
=[Punadjust *( Mult / 10000)] +[(Offset /100)+(Correction Sea Lvl /100)]
2.0 INTRODUCTION
MODEL61402LBarometricPressureSensorisaversatile
electronic barometer featuring high accuracy, low power,
wide operating temperature range, and calibrated 4-20 mA
output, with SDI-12 and RS-232/485 serial data I/O.
The4-20mAoutputandRS-485serialI/Omakethe
61402L ideal for commercial and industrial applications that
commonly use these signals.
Full scale current output may be set to span any portion of
the 500 to 1100 hPa operating range. Serial output options
include continuous or polled ASCII text output, NMEA marine
output or SDI-12. The sensor is supplied with the following
standard configuration:
Current Output 4-20 mA = 500 to 1100 hPa
RS-232 Continuous ASCII text output 9600 baud
 16samplesaveraged
1.8 Hz update rate
3.0 INSTALLATION
Thesensoroperatesoveratemperaturerangeof-40°Cto
+60°C and must remain dry. Electrical connections are made
with the 5-position terminal plug included with the sensor.
Jumper settings may be used to select operating options.
Access jumpers by loosening two screws in the sensor
enclosureandremovingthecover.Seelastpageforwiring
details and jumper settings.
4.0 OPERATION
Operation begins approximately 1 second after power is
applied. Output will appear after a delay determined by
thenumberofsamplesaveragedandtheoutputrate.With
defaultvalues(1.8Hzoutputand10samplesaveraged),
output begins after an initial 5 second delay then remains
continuous at the 1.8 Hz rate. Parameters for output rate
andnumberofsamplesaveragedmaybechangedusing
software commands.
4.1 CURRENT OUTPUT
Calibrated4-20mAcurrentoutputisalwaysactive.The
connection scheme appears in the Wiring configurations
section.
The current output scale may be mapped to any part of the
500 to 1100 hPa pressure range using the IOUT HI and
IOUT LO software parameters. The standard setting maps 4
to 20 mA with 500 to 1100 hPa. With this setting:
hPa = 37.5 * mA + 350
 Effectiveresolutionisabout0.15hPa
Greatereffectiveresolutionmaybeachievedbymapping
the current output to a narrower range of pressure with the
IOUT HI and IOUT LO parameters. For example, with IOUT
LO set to 950 hPa and IOUT HI set to 1050 hPa:
hPa = 6.25 * mA + 925
 Effectiveresolutionisabout0.025hPa
Please see section 4.3 below for details on changing the
IOUT HI and LO parameters.
4.2 SERIAL OUTPUT
The61402Lmaybeconguredforfull-duplexRS-232,half-
duplex RS-485, or SDI-12 by using the lower jumper pair. In
addition, the upper jumpers must be set as follows:
Lower Upper Output
RS-232 (A,B,C) Continuous ASCII Text
RS-485 (B,C) Polled ASCII Text
SDI-12 (C only) SDI-12
Standardbaudrateis9600butseveralbaudratesbetween
1200and38400areavailable.
SDI-12baudrateisxedat1200.

CMD140 n sets the IOUT Pressure Range HI
CMD142 n sets the IOUT Pressure Range LO IOUT
Pressure Range HI must be greater than IOUT
Pressure Range LO
CMD144 n sets the IOUT Scale:
1 = 0 to 20mA, or 4 = 4 to 20 mA.
CMD150 c sets the poll address character for ASCII and
SDI-12 modes. Any ASCII character from ‘0’
(ASCII 48) to ‘z’ (ASCII 122) may be used. For
SDI-12 limit the characters from 0 to 9.
CMD160 n setsthebaudrate.Acceptablevaluesare
38400, 9600, 4800, 2400, and 1200. Note
that the baud rate change occurs immediately
afterthecommandisreceived.Therefore,in
order to continue communicating, the serial
communication program that issued the
command must also change to match.
CMD300 n causes the sensor to pause or resume
measurement. 1 = Stop, 2 = Run.
CMD400 n causes the sensor to issue a report
summarizing parameter settings.
1=Text(parametervaluesandlabels)
2=CodeOnly(parametervaluesonly).
CMD420 burns the current parameter settings to flash
memory. This step musttakeplacetoretain
changes to settings otherwise parameters will
reverttopreviousvaluesatthenextpowerup.
4.4 SDI-12 COMMANDS
SDI-12 stands for serial data interface at 1200 baud. It is
often used to interface battery powered data recorders with
microprocessorbaseddevicesdesignedforenvironmental
data acquisition. SDI-12 is used typically when low power
isaconcern.TheSDI-12devicenormallyremainsina
low power, standby state until it is polled at which time
ameasurementissent.SDI-12caneffectivelyaddress
multiple sensors on the same cable.
Model 61402L uses the SDI-12 (V1.4) serial communication
protocol to initiate measurements and set sensor operation
parameters. The default sensor address is 0 (zero), and
canbechangedtoanyvalidsingle-charactervalueif
needed. Additional details about the SDI-12 protocol may
be found at www.sdi-12.org.
After initial power-up with 12 VDC, the sensor is in a low-
power standby state with a quiescent current of 1.60 mA. A
validandproperlyaddressedSDI-12commandwakesthe
sensortoinitiateameasurement,setorcheckoperating
parameters. After command processing has finished, the
sensor returns to the low-power standby state.
SDI-12 ‘M’ or ‘C’ commands initiate a measurement. The
sensor response message indicates the maximum time
neededbeforethemeasurementisready,anddatavalues
willbeavailable.Themaximumtimerangesfrom1to5
seconds depending on the Sample Count.
If an ‘M’ command initiates a measurement, the sensor
sendsaServiceRequestwhenthemeasurementisready
toberetrieved.Whenthepollingdevicereceivesthe
ServiceRequestitthensendsa‘D’commandtorequest
measurement results from the sensor. With ‘C’ commands,
noServiceRequestissent,andthepollingdevicemust
wait the full delay time before sending the ‘D’ command to
request the measurement.
SDI-12 Measurement commands and responses:
COMMAND RESPONSE DESCRIPTION
aM! attts<CR><LF> Take a measurement
aMC! attts<CR><LF> Take a measurement with CRC
checksum
aC! atttss<CR><LF> Take a concurrent measurement
aCC! atttss<CR><LF> Take a concurrent measurement
with CRC checksum
aD0! a+tttt.t+bbbb.b<CRC><CR><LF>
where:
a= Sensor address
ttt = Delay time (seconds)
s/ss = Number of samples to collect
ttt.t = Temperature (selected units)
bbbb.b = Barometric Pressure (selected units)
<CRC> = CRC checksum (only where requested)
<CR><LF> = Carriage return, line feed (ASCII 13, 10)
SDI-12 NON-MEASUREMENT COMMANDS:
The SDI-12 protocol includes standard commands for
identifying the sensor and changing its address.
CMD RESPONSE DESCRIPTION
?! a<CR><LF> Address Query
a! a<CR><LF> Acknowledge Active
aI!
a13YOUNGC092000vvvnnnnnn<CR><LF>
Send Identification: vvv = Firmware Version
nnnnnn = Serial Number
aAb! b<CR><LF> Change Address:
a = Sensor address
b = New sensor address
aV! a0000<CR><LF> Start Verification
EXTENDED COMMANDS:
The SDI-12 command set may be customized with
Extended Commands to accommodate manufacturer
settings and other functions. Extended Commands are
listed below. Where two responses are shown, one is for a
validcommand,theotherisforaninvalid(ERR)command.
COMMAND RESPONSE DESCRIPTION
aXB! aXB, OK<CR><LF>
Save parameter settings to flash.
Cycle power after saving parameters.
aXP!
aXP,V=v,OP=o,ASC=s,MP=m,OS=op,SC=sc<CR><LF>
v = voltage (120 = 12.0 volts)
o =
s =
m =
op = offset (hPa x 10)
sc = sea level correction (hPa x 10)
aXC±nnnn! aXC,SC=±nnnn<CR><LF>
Sea Level Correction (-5000 to +5000 hPa)
aXF±nnnn! aXF,OP=±nnnn<CR><LF>
Offset (-5000 to +5000 hPa)
aXM aXM, M=nnnnn<CR><LF>
Multiplier (10000 = 1.0000)
aXO aXO, O=nn<CR><LF>
Output Period (0 – 60)
aXS aXS, S=nn<CR><LF>
Sample Count (1 – 32)
5.0 MAINTENANCE
The MODEL 61402L barometer requires no regular
maintenance. Periodic calibration certification, if required,
isavailablefromthefactory.
6.0 WARRANTY
This product is warranted to be free of defects in materials
and construction for a period of 12 months from date of
initial purchase. Liability is limited to repair or replacement
ofdefectiveitem.Acopyofthewarrantypolicymaybe
obtained from R. M. Young Company.

7.0 EMC COMPLIANCE
ThisdevicecomplieswithPart15oftheFCCRules.Operation
is subject to the following two conditions: (1) this device may
notcauseharmfulinterference,and(2)thisdevicemustaccept
anyinterferencereceived,includinginterferencethatmaycause
undesired operation.
This equipment has been tested and found to comply with the
limits for a ClassA digital device, pursuant to part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment
is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to
cause harmful interference in which case the user will be
required to correct the interference at his own expense.
ThisISMdevicecomplieswithCanadianICES-001.
Cet appareil ISM est conforme à Ia norme NMB-001 du Canada.
EN55011/CISPR11,Group1,ClassBdevice.
Class B equipment is suitable for use in domestic establishments
andinestablishmentsdirectlyconnectedtoalowvoltagepower
supply network which supplies buildings used for domestic
purposes.
8.0 CE COMPLIANCE
This product has been tested and complies with European
CErequirementsfortheEMCDirective.Pleasenotethat
shielded cable must be used.




























1200 BAUD

EXAMPLE:
900 ohms max load resistor = ( 24 V - 6 ) / 0.02A
supply
( V - 6 )
0.02
load resistor (ohms) =
out
Maximum I





 
SET LOWER JUMPER PAIR
TO RS-485 OR RS-232















 
9600 BAUD
16 SAMPLE AVERAGE COUNT
1.8 HZ
WIRING CONFIGURATIONS