Seametrics PT2X-BV Instructions Manual
Precision Environmental Sensors
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PT2X-BV
Barometric/Vacuum Smart Sensor and
Data Logger Instructions
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TABLE OF CONTENTS
PT2X-BV INSTRUCTIONS
General Information
Features ...........................................................................................................................................................................Page 3
Dimensions ....................................................................................................................................................................Page 3
Specications ................................................................................................................................................................Page 4
Initial Inspection and Handling ..............................................................................................................................Page 5
Do’s and Don’ts ............................................................................................................................................................Page 5
Installation
Connecting External Power ......................................................................................................................................Page 6
Connecting a PT2X-BV to a Computer ................................................................................................................Page 6
Connecting to Sensors ..............................................................................................................................................Page 7
Wiring and Pin-Outs ...................................................................................................................................................Page 8
Installing Aqua4Plus 2.0 ............................................................................................................................................Page 8
Battery Life Calculator ................................................................................................................................................Page 8
Using Without Aqua4Plus 2.0 .................................................................................................................................Page 8
Installing the Sensor ...................................................................................................................................................Page 9
Settings and Calibration
Sensor Settings .............................................................................................................................................................Page 10
Program Settings .........................................................................................................................................................Page 10
Operation
Real-time Date ..............................................................................................................................................................Page 11
Data Logging .................................................................................................................................................................Page 12
Reports .............................................................................................................................................................................Page 14
Barometric Compensation .......................................................................................................................................Page 15
Direct Read Modbus/SDI-12
Power Consideration ..................................................................................................................................................Page 16
Reading via Modbus RTU .........................................................................................................................................Page 16
Reading via SDI-12 ......................................................................................................................................................Page 17
Maintenance
Removing Debris from End Cone ..........................................................................................................................Page 19
Sensors ............................................................................................................................................................................Page 19
Cable .................................................................................................................................................................................Page 19
Changing Batteries ......................................................................................................................................................Page 19
Troubleshooting
Problems/Probably Causes/Things to Try ..........................................................................................................Page 23
IF USING ALKALINE BATTERIES—PREVENT BATTERY LEAKAGE!
PT2X-BV sensors are typically shipped with lithium batteries. If,
however, you are using alkaline batteries, be aware that under
some circumstances alkaline batteries can leak, causing damage
to the sensor. To prevent leakage, the following is recommended.
(Does not apply to lithium batteries.)
• Change the batteries at least every 18 months.
• If the sensor will not be deployed for 3 months or more,
Seametrics • 253.872.0284 Page 2 seametrics.com
remove the batteries.
GENERAL INFORMATION
PT2X-BV INSTRUCTIONS
The Seametrics PT2X-BV is a special version of the PT2X
designed to measure barometric and vacuum pressure in
reference to absolute pressure, along with temperature and
time. It will measure pressure/vacuum from 600 to 1100
millibars. This sensor networks with all of the Seametrics
Smart Sensor family.
The PT2X-BV is a microprocessor based digital intelligent
sensor designed to measure and record pressure,
temperature, and time, using low power, battery operated
circuitry.
Pressure is measured with an extremely rugged and stable
piezo-electric media-isolated pressure element combined
with a 16-bit analog-to-digital converter. This provides
extremely accurate and stable pressure input into the
microprocessor on the circuit board.
This industry standard digital RS485 interface device
records up to 520,000 records of barometric pressure,
temperature, and time data, operates with low power, and
features easy-to-use Aqua4Plus 2.0 software with powerful
features. The PT2X-BV is available in two enclosures –
either an ABS weather-proof box or a stainless steel tube.
The tube version is available with either a solid end cone or
an NPT end cone for connecting to piping.
Two internal 1.5V AA batteries power the PT2X-BV.
(Auxiliary power supplies are available for data intensive
applications.) The unit is programmed using our easy-touse Aqua4Plus 2.0 control software. Once programmed
the unit will measure and collect data on a variety of time
intervals.
A PT2X-BV, along with several PT2Xs, CT2Xs, LevelSCOUTs
and other Seametrics Smart Sensors, can be networked
together and controlled directly from a single computer.
While most will use the PT2X-BV with our free, easy-touse Aqua4Plus 2.0 software, it is by no means limited to
that software. You can use your own Modbus® RTU or SDI12 software or logging equipment to read measurements,
thus tying into your existing systems and databases.
Features
Dimensions
Box 4.3” x 3.1” x 2.6” 11 x 8 x 6.5 cm
Box (including connectors) 4.3” x 3.6” x 2.6” 11 x 9 x 6.5 cm
Tube (cabled) 12.18” x 0.75” diameter 30.9 cm x 1.9 cm diameter
Tube (cableless) 11.93” x 0.75” diameter 30.3 cm x 1.9 cm diameter
Box Version
Communications Port:
• At end of cable on cabled
version
• Inside cap on cableless
version
Air Inlet/Vacuum Port
Communications Port
English Metric
Tube Versions
Air Inlets
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GENERAL INFORMATION
PT2X-BV INSTRUCTIONS
Specications*
Box Enclosure Body Material ABS - IP66/67
Dimensions Box: 4.3” x 3.1” x 2.5” (10.9 x 7.9 x 6.4 cm)
Wire Seal
Material
Tube & Cable Body Material Acetal & 316 stainless or titanium
Dimensions Cabled: 12.18” x 0.75” diameter (30.9 cm x 1.9 cm)
Wire Seal
Material
Weight 0.8 lb. (0.4 kg)
Cable Submersible: polyurethane, polyethylene, or ETFE (4 lb./100 ft., 1.8 kg/30 m)
Environmental IP68, NEMA 6P
Field Connector Standard
Temperature Operating Range Recommended: -15˚ to 55˚C (5˚ to 131˚F)
Storage Range Without batteries: -40˚ to 80˚C (-40˚ to 176˚F)
Power Internal Battery Two lithium ‘AA’ batteries - Expected battery life: 18 months at 15 min. polling interval (may vary do to
Auxiliary 12 Vdc - Nominal, 6-16 Vdc - range
Communication Modbus® RS485 Modbus® RTU, output=32bit IEEE oating point
SDI-12 SDI-12 (ver. 1.3) - ASCII
Logging Memory 4MB - 520,000 records
Logging Types Variable, user-dened, proled
Logging Rates 8x/sec maximum, no minimum
Baud Rates 9600, 19200, 38400
Software Complimentary Aqua4Plus 2.0
Networking 32 available addresses per junction (Address range: 1 to 255)
File Formats .a4d and .csv
Output Channels Temperature Depth/Level¹
Element Digital IC on board Silicon strain gauge transducer, 316 stainless or Hastelloy
Accuracy ±0.5°C — 0° to 55°C (32˚ to 131˚F)
Resolution 0.1˚C 0.0034% FS (typical)
Units Celsius, Fahrenheit, Kelvin PSI, FtH₂O, inH₂O, mmH₂O, mH₂O, inH₂O, cmHg, mmHg, Bars, Bars,
Range -40˚ to 80˚C (-40˚ to 176˚F) 600 to 1100 millibars
Compensated --- 0˚ to 40˚C (32˚ to 104˚F)
Max operating pressure 1.1 x full scale
Burst pressure 2.0 x full scale
*Specications subject to change. Please consult out web site for the most current data (www.seametrics.com). Modbus is a registered trademark of Schneider Electric.
Box and connectors: 4.3” x 3.6” x 2.5” (10.9 x 9.1 x 6.4 cm)
Fluoropolymer and Buna N
Cableless: 11.93” x 0.75” diameter (30.3 cm x 1.9 cm)
Fluoropolymer and PTFE
environmental factors)
±2.0°C — below 0°C (32˚F)
±0.05% FSO (typical, static)
±0.1% FSO (maximum, static)
(B.F.S.L. 20˚C)
kPa
Note: Intended for use in atmosphere—not to be submerged.
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GENERAL INFORMATION
PT2X-BV INSTRUCTIONS
Initial Inspection and Handling
Upon receipt of your PT2X-BV, inspect the shipping package for damage. If any damage is apparent, note the signs of
damage on the appropriate shipping form. After opening the carton, look for concealed damage. If concealed damage
is found, immediately le a claim with the carrier.
Do’s and Don’ts
Box Version
BAROMETRIC AND VACUUM SENSOR
PT2X-BV
BAROMETRIC AND VACUUM SENSOR
PT2X-BV
BAROMETRIC AND VACUUM SENSOR
PT2X-BV
Do handle sensor with
care
Tube version
Don’t install so box or
connector is submerged
Do protect from
excessive sun or heat
Don’t bang or drop on
hard objects
Do install sensor so
the connector end is
kept dry
Don’t scrape cable
over edge of well
May nick or fray the
cable
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Don’t bend cable
sharply
May weaken internal
wires
Don’t install so
sensor may be
submerged
Don’t support sensor
with the connector
Use a strain relief device
INSTALLATION
PT2X-BV INSTRUCTIONS
Connecting External Power
The PT2X-BV comes with two 1.5V AA internal batteries.
If auxiliary power is desired, you can use a 6–16 VDC supply
that can provide 15 mA. Connect to Vaux++ (pin 1 - white)
and Ground (pin 5 - blue) or contact Seametrics for auxiliary
power supplies.
Connecting the PT2X-BV to a Computer
Connect your computer to the PT2X-BV communication
port using Seametrics USB to RS485 adapter. If you have the
tube version, connect to the weather-resistant connector
on the cable or end of the sensor on the cableless version.
(For alternate connection options, see below.)
USB to RS485
Adapter
Screwcap
Sensor
Cableless
Conguration
Sensor
OR
USB Port
PC or Laptop
Computer
Connecting sensor to your computer using
Seametrics USB to RS485 adapter.
Connecting via RS232 Serial Port
Connect the weather-resistant connector to your
computer’s serial port as shown in next column.
Interface Cable
Screwcap
Sensor
OR
Cableless
Conguration
Sensor
RS485/RS232
Adapter
Serial Port
PC or Laptop
Computer
Connecting sensor to your computer using
an RS485/RS232 adapter and an interface cable.
Connecting with a USB/Serial Adapter
USB-to-Serial cables are readily available from many
electronics and computer stores, as well as numerous sites
on the Internet. Seametrics has tested and recommends
the Keyspan USA-19HS. Install as follows:
• Plug into USB port.
• Install the drivers provided with the particular unit.
• Once drivers are installed connect to sensor.
Aqua4Plus 2.0 communicate with the sensor using the USB
to RS485 adapter cable. This cable requires drivers to be
installed on your computer. If you are connected to the
Internet when you rst plug in the cable, it will normally
obtain and install the correct drivers automatically. If this
does not happen, or if you do not have Internet connection,
you can use Aqua4Plus 2.0 to install the drivers.
Alternate Connection Options
Seametrics recommends connecting the sensor to your
computer using the Seametrics USB cable. However, when
using Aqua4Plus 2.0, the sensor can also be connected
using an RS232 serial port or a USB-to-Serial cable, as
described below.
Interface
Screwcap
Sensor
Cableless
Conguration
Cable
OR
Adapter
RS232/RS485
Adapter
Sensor
Connecting sensor to your computer using
a USB to Serial adapter and an interface cable.
USB PortUSB-to-Serial
PC or Laptop
Computer
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INSTALLATION
PT2X-BV INSTRUCTIONS
Connecting to Sensors
Aqua4Plus 2.0 is designed to automatically detect your communication cable and scan for sensors. It is recommended
you connect your USB/RS485 cable to your PC and have the sensor connected before opening Aqua4Plus 2.0.
If your cable and sensor were not connected before opening Aqua4Plus 2.0 simply connect and click Rescan. While
scanning is active you’ll see a green dot ash in the upper right corner of the program. Scanning is complete when this
dot stops ashing.
If your sensor still won’t connect you can expand the Modbus address range under program settings here:
Simply drag the Address Range slider higher up to increase the maximum Modbus address scanned. If you’ve scanned
all the way up through address 255 and still have no connection click Troubleshooting for further troubleshooting or
contact Seametrics Tech Support for assistance.
Click at any time to refresh sensor information.
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INSTALLATION
Earth ground
PT2X-BV INSTRUCTIONS
Wiring and Pin-outs
Pin-out for bulkhead connector on box version and
connector on cableless tube version
Pin Description
1 12 Vdc+
2 Modbus D–
3 Modbus D+
4 SDI-12 Signal
5 Ground
Pin-out for cabled tube version
With connector:
White
Purple
Yellow
Brown
Blue
Shield
1
2
3
4
5
5-Pin
Connector
12 VDC+ (Vaux)
Modbus DModbus D+
SDI-12
12 VDC- (GND)
Without connector:
White
Purple
Yellow
Brown
Blue
Shield
12 VDC+ (Vaux)
Modbus DModbus D+
SDI-12 Signal
12 VDC- (Gnd)
Installing Aqua4Plus 2.0
The PT2X-BV comes with the Aqua4Plus 2.0 host software
that is installed on your PC or laptop. Use this software to
program the datalogger, to retrieve data from the logger,
to view collected data, and to export data to external les
for use with spreadsheets or databases.
Refer to the software manuals for details on installing and
using Aqua4Plus 2.0.
The PT2X-BV can take readings more often than once per
second. This is known as a “continuous rate.” See logging
setup.
Battery Life Calculator
IMPORTANT NOTE for PT2X-BV sensors with rmware 2.13
or higher!
PT2X-BVs with rmware version 2.13 and higher have a
battery life calculator that is set at the factory when batteries
are rst put in the sensor. If the battery life calculator is not
reset, the remaining life information will be incorrect.
If you need to replace the batteries, see the Maintenance
section in this manual for replacement information and for
information on resetting the battery life calculator.
NOTE: If you have a rmware version prior to 2.0, SDI-12
is not available.
Using Without Aqua4Plus 2.0
Most users will use the PT2X-BV with Seametrics Aqua4Plus
2.0 software. However, the PT2X-BV is quite versatile,
communicating via either Modbus® or SDI-12 interfaces,
allowing you to do the following:
• Read a PT2X-BV via Modbus® using your own
software.
• Read a PT2X-BV via SDI-12 protocol.
• Display readings from a PT2X-BV on a panel meter.
If you want to use one of these methods, see page 10.
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