AMALGAMATED INSTRUMENT 61202L User manual

MODEL 61202L
BAROMETRIC PRESSURE SENSOR
OCTOBER 2001
MANUAL PN 61202L-90
ACN: 001 589 439
AMALGAMATED INSTRUMENT CO PTY LTD
Unit 5, 28 Leighton Place Hornsby Telephone:
NSW 2077 AUSTRALIA Facsimile:
[phone] e-mail: [email protected]
[phone] Internet: www.aicpl.com.au

1
MODEL 61202L
BAROMETRICPRESSURESENSOR
INSTRUCTION SHEET 61202-90
REV 10-01
1.0 SPECIFICATIONS
Pressure 600 to 1100 hPa standard range
Digital Resolution 0.1 hPa
Operating Temperature -50 to +60 °C
Accuracy ±0.3 hPa at 20 °C
±1 hPa at -50 to +60 °C
Update Rate 2 seconds
Serial Output Full duplex RS-232
Half duplex RS-485
9600 baud
Polled or continuous
ASCII text output
Analog Outputs 4.00 to 20.00 mA
Standard range 600 to 1100 hPa
Other ranges user settable
Analog Resolution Depends on range
0.1 hPa typical
Power 7 to 30 VDC at 30mA
Case Fiber-reinforced Thermoplastic
Weight Net 1 lb 5 oz
Shipping 4 lb
2.0 INTRODUCTION
MODEL 61202 Barometric Pressure Sensor is a versatile
electronic barometer featuring high accuracy, low power,
wide operating temperature range, and calibrated outputs in
several formats.
Low power consumption and wide temperature range make
the 61202 ideal for remote applications using battery or solar
power. Accuracy better than ±1 hPa is maintained over the
entire pressure and temperature ranges.
All models include full duplex RS-232 and half duplex RS-485
serial connections. Model 61202L is configured for 4-20mA
output.
The standard pressure scale for analog outputs spans 600
to 1100 hPa. A narrower range may be selected via soft-
ware menu. Serial outputs run in continuous or polled modes.
In polled mode, a network of up to 32 sensors may be
individually addressed.
3.0INSTALLATION
The 61202 may be mounted to a mast or panel. Always
mount the barometer so the cable exit faces down. For mast
mount, use the V-block and U-bolts. For panel mount, remove
the V-block and U-bolts to exposes holes in the mounting
plate.
To access electrical connections, remove the 61202 top
cover. Loosen the nut on the weather-proof strain relief on
the bottom of the case. Run cables through the nut and
strain relief opening. Connect wires to the labeled terminals
on the circuit board as shown in attached WIRING DIAGRAM.
Place jumpers at J1 to select RS-232, RS-485, or analog
output. Finger-tighten the strain relief nut and replace the
cover.
When installed outdoors, we recommend using the barometer
with a Young Model 61002 Pressure Port to minimize
pressure errors caused by wind flow over the barometer
inlet.
3.1 JUMPER SETTINGS
Jumper J1 selects the data output format (Voltage, 4-20mA,
RS232 or RS485). Jumper J2 selects other parameters such
as (B) POLLED/CONTINOUS, (C) 50/60 Hz noise reduction.
Refer to wiring diagram for specific jumper settings.
4.0 OPERATION
Operation begins 3 seconds after power is applied. Outputs
are updated once every 2 seconds.
4.1 ANALOG OUTPUT
Be sure jumper J1 is in the IOUT (factory default) position .
Standard current output range is 4.00 to 20.00 mA full scale
for 600 to 1100 hPa (0.0032 mA per 0.1 hPa).
Other pressure ranges within the 600 to 1100 hPa span may
be selected via software commands but the full scale output
signal range will always be the same, 4-20 mA. See SOFT-
WARE COMMANDS for details.
4.2 SERIAL OUTPUT
The baud rate is 9600. Serial output may be set to CONTINU-
OUS (factorydefault) or POLLED mode using jumper J2. All
serial output is numeric ASCII text representing pressure in
hPa. Each string is terminated with a CR (ASCII 13). Example:
0983.9
0983.9
0983.9
0983.9
In CONTINUOUS mode, serial data is automatically sent once
every 2 seconds.
In POLLED mode, the unit sends data only after receiving a
poll command. The poll command is Ma! where a is the
address. The default address is 0 (ASCII 48). Upon receiving
a properly addressed poll command, the unit sends data at
the next available 2-second output interval.
61202 Barometer mounted on mast. Barometer shown with
61002 Pressure Port

2
4.3 SOFTWARE COMMANDS
All commands sent to the 61202 must use a minimum delay
between characters of 20 milliseconds. Characters arriving
faster than this may be missed.
When IN OPERATE MODE sending three ESC (ASCII 27)
characters activates the COMMAND mode. If using RS-485
connections, send the ESC characters only when the unit is
not transimitting data. Othewise, the characters will be
missed.
COMMAND mode is indicated by a ">" prompt. All comands
must be terminated with a CR (ASCII 13). Use "??" to list
available commands and current setup parameters as shown
below.
>??
YOUNG MODEL 61202 BAROMETER V.BAR0404
-------------------------------------
Rn SET REFERENCE TO SEA LEVEL
On SERIAL OUTPUT FORMAT
Kn SET CALIB OFFSET
Sn SET CALIB SLOPE
Ln ANALOG OUT LO RANGE
Hn ANALOG OUT HI RANGE
T1 TRANSFER EEPROM OUT
An SET POLL ADDRESS
Ma! POLL ADDR a (DURING OPERATE)
XX EXIT TO OPERATE
O:1 K:0 S:10000 R:0 L:9750 H:10250 A:0
VM:7940 VO:2 IM:2521 IO:-989 IV:976
PS:2086 PO:13374 TS:18145 TO:9688 DCBA:1111 WD:N
>
Rn sets sea level reference where n is the offset value in
hPa x 10. This value is added to the measured pressure
to give the equivalent pressure at sea level.
On sets serial output format where n is the format type.
n = 1 Normal setting (pressure only)
n = 2 Diagnostic output for factory only
Kn sets an offset where n is hPa x 10. For example, to add
an offset of +0.2 hPa, enter K2. The Kn offset is applied
after the Sn multiplier is applied. Kn is normally set to 0.
Sn sets a multiplier where n is the multiplier x 10000. For
example, to multiply by 1.0123, enter S10123. The Sn
multiplier is applied before the Kn offset is applied. Sn is
normally set to 10000.
Ln sets the LOW end of the analog output range where n is
hPa x 10. Use with the Hn command to set the analog
output span. The standard value is 6000 for 600.0 hPa.
Ln entries are limited to values between 6000 and 10000.
For example, to set the LOW end of the range to 800 hPa,
enter L8000.
Hn sets the HIGH end of the analog output range where n is
hPa x 10. Use with the Ln command to set the analog
output span. The standard value is 11000 for 1100.0 hPa.
Hn entries are limited to values between 7000 and 11000.
As an example, to set the HIGH end of the range to 1050
hPa, enter H10500.
T1 dumps the internal EEPROM contents. This is for factory
use only.
An sets the address for POLLED mode. The address may be
any ASCII character in the range '0-9', 'A-Z', or 'a-z'.
Ma! is the POLL command where 'a' is the address. A
response appears only when the address in the POLL
command matches that of the unit being polled. This
command functions only while the 61202 is in OPERATE
mode and is listed in the HELP screen only as a conve-
nience.
XX returns barometer to operate mode.
Values shown at the end of the list are calibration param-
eters for factory use only. All settings are retained when
power is removed.
5.0 MAINTENANCE
The Model 61202 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 pur-
chase. 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 CE COMPLIANCE
This product complies with European CE requirements for the EMC
Directive. Please note that shielded cable must be used.
Declaration of Conformity
Application of Council Directives:
89/336/EEC
Standards to which Conformity is Declared:
EN 50082-1(IEC 801-2,3,4)
Manufacturer's Name and Address:
R. M. Young Company
Traverse City, MI, 49686, USA
Importer's Name and Address:
See Shipper or Invoice
Type of Equipment:
Meteorological Instruments
Model Number /Year of Manufacture:
61202 / 2001
I, the undersigned, hereby declare that the equipment
specified conforms to the above Directives and Stan-
dards.
Place / Date:
Traverse City, Michigan, USA / October 1, 2001
David Poinsett
R & D Manager, R. M. Young Company