Seametrics PT2X-BV Instructions Manual

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Page 1

Precision Environmental Sensors

An ON

CON Brand

PT2X-BV

Barometric/Vacuum Smart Sensor and

Data Logger Instructions

PROUDLY MADE IN THE

USA

ISO

9001:2008

Page 2

TABLE OF CONTENTS

PT2X-BV INSTRUCTIONS

General Information

Features ...........................................................................................................................................................................Page 3

Dimensions ....................................................................................................................................................................Page 3

Specications ................................................................................................................................................................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,

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remove the batteries.

Page 3

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

Specications*

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-dened, proled 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

*Specications 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

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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

Conguration

Sensor

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

Cableless

Conguration

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

Conguration

Cable

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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Page 8

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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Page 9

INSTALLATION

PT2X-BV INSTRUCTIONS

Installing the Sensor For Barometric Measurement

Box version

The PT2X-BV box version can be installed in any position; however, it is tested at the factory in the vertical position. Therefore, when installing the transmitter outdoors, Seametrics recommends installing it in a vertical position to avoid moisture entering the inlet. Seametrics also recommends installing a sun shield to avoid overheating.

Vertical installation

recommended to avoid moisture entering the

air inlet

Air Inlet

Tube version

The PT2X-BV tube version can be installed in any position; however, when it leaves the factory it is tested in the vertical position. Strapping the sensor body with tie wraps or tape will not hurt it. Be sure to install so that air inlets will never be submerged. Seametrics also recommends installing a sun shield to avoid overheating.

For Vacuum Measurement

If installing a vacuum tube for vacuum measurements, be sure that the tubing is not collapsible. The box unit is provided with a detachable Quick-Connect (QC) with a

male 1/8” pipe tting. Attach the tubing to the QC using an appropriate tube tting for the tubing chosen. Attach a tting to the inlet male QC designed to seal the tubing of your choice. Seal the tting to the QC by using sealant

or PTFE tape. Connect the male QC to the inlet QC of the PT2X-BV and the other end of the tube to the vacuum

source using appropriate ttings.

Settings and Calibration

Settings and calibration values can only be changed when

there are no les stored on the sensor. Be sure to retrieve

any data and then erase the data before continuing.

The temperature channel rarely needs adjustment. If you think your temperature channel needs adjusting, contact your service representative.

Before leaving the factory your PT2X-BV was inspected using precision instruments. However, you can adjust the settings, if needed, as shown below.

When using a barometric sensor, you may want to change the channel label at the top of the Settings window to read “Barometric Pressure.”

Note: Be sure to use the same units for all measurements on this page. For example, if you have the program set to display in psi then be sure to enter the barometric pressure as psi.

-- Computing Oset --

• Using a barometric pressure indicator or other measuring device, determine the current barometric pressure.

• Enter this value in the REF box..

• Click the Measure button.

• When readings have stabilized to your satisfaction, click the Accept button in the pop-up box.

-- Applying oset --

• Click the Apply button to apply calculated oset.

• The calculated oset will be transferred to the oset eld near the top of the window.

• Click OK to save the value to the sensor!!!

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Page 10

SETTINGS AND CALIBRATION

PT2X-BV INSTRUCTIONS

Sensor Settings

Once connected you’ll see the Sensor screen appear and display the connected sensor(s) details. Mousing over--- icons will provide tool-tips, mouse over to view sensor

rmware and serial number details.

To change general sensor settings click in the sensor screen. This allows you to change the following:

Program Settings

To view/change Aqua4Plus 2.0 settings click in the blue side-bar menu

Under the General Settings tab you can change the default data folder location. This is where your Reports are saved to on your PC.

The Zoom Factor slider can be used to adjust the font size within Aqua4Plus 2.0.

Click to rename the sensor

To change Modbus address and/or Baud Rate simply select the desired address and/or Baud Rate from the drop down menus. Sensor will automatically reconnect at new address and/or Baud Rate

To change the Direct Read output units (for direct Modbus or SDI12 integration) simply select the desired output units from the drop down menus. To change Aqua4Plus

2.0 display units scaling see Program Settings.

Sensor Clock can be synced with your PC time or set manually if desired. To set manually enter your desired date/time and click Set Time.

When batteries are changed out make sure to reset the battery information here, simply check the I have just put in new batteries box and select the battery type that was installed from the drop down menu.

Uncheck the Allow app to collect anonymous usage statistics box if you would like to opt out. This information

is used to track Aqua4Plus 2.0 reliability across dierent system congurations.

Under the Display Units tab you can select your desired display units for the supported channels. These may be changed at any time and associated Real-Time readings and Reports will rescale to the currently selected display unit. To change Direct Read units scaling see Sensor Settings.

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Page 11

SETTINGS AND CALIBRATION

Under the Communications tab you can change your Modbus communication settings. Typically you will only need to change the address range to connect to sensors outside of Modbus address 1-10. In certain cases we may need to change the Retry and Timeout settings to overcome communication issues on very long, or corroded cabling. See Troubleshooting section or contact Seametrics Tech Support for details.

PT2X-BV INSTRUCTIONS

To start real-time readings click Start, readings default to table view

To switch to Real-time graphing view click the graph icon

To restore factory default settings click

Real-time Data

Connect to sensor and select the Real-time data tab

Real-time readings default to a 1 second interval for 1 minute, to adjust enter your desired settings here:

Note: Currently this data is not saved and is for viewing current conditions only. To save the data to sensor memory see Data Logging section. You can run Real-time Data while logging is active.

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Page 12

OPERATION

Data Logging

Select Set Up Logging from the sensor screen

PT2X-BV INSTRUCTIONS

Duration can be set by either number of records

If there are no les currently on the sensor you’ll see the

Set Up Logging button active under the Data Files tab as

well as in the upper menu. Once les have been started/

logged on the sensor they will be displayed under the Data Files tab.

Setting Up Logging Window

Here you will name your data le and set up the recording

interval and duration of each logging phase. Select your desired recording interval and duration for each phase, Aqua4Plus 2.0 will display the available memory at the bottom of the window.

Or by setting a duration time

When set by number of records the time of the recording phase will be displayed detailing how long that phase will run. When set by time, the total number of records for that phase will be displayed.

If you need to check settings or perform a calibration click

before proceeding with logging setup to switch to the

Settings and Calibration screen.

You may sync the sensor clock with the PC clock when starting logging by clicking the slider here.

Check the Delayed Start box and enter the desired date/ time you would like logging to start. This is useful for syncing data when setting up multiple sensors on a site. Data will start logging at the set date/time rather than immediately when Start is pressed.

Click to switch between interval and continuous data recording (PT2X & CT2X only) Select your continuous rate from the drop down box here.

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Page 13

OPERATION

PT2X-BV INSTRUCTIONS

Data le name defaults to Test File # and may be re-named

here.

The 3 previous Logging Schedules that were programmed to a sensor will be listed under the Select Template drop

down menu. There you will also nd pre-programmed

logging schedules such as 24 hour pump test, along with any custom logging schedules saved by the user.

To save a logging schedule as a template enter desired

settings and click This will add your custom schedule

to the Select Template menu.

Once all the desired settings are made simply click Start to begin logging.

Data les already downloaded will show in the Reports column, clicking here will bring you to the reports screen to view the data. See Reports section for details.

You may only have 1 active data le recording on each sensor, however you can store multiple les in memory if

desired.

Starting a new le will automatically terminate the active

logging and begin the new logging schedule. Real-time data is available during active logging.

This will return you to the Sensor screen and your status

will change to Active with the data le displayed under the Data Files tab. Mouse over an active le to pause, terminate,

download, or view logging setup details.

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To delete les from memory make sure they have all been

downloaded to Reports. Files are removed from memory all at once rather than individually.

Once conrmed les are permanently deleted from the

sensor memory.

Page 14

OPERATION

Reports

Data downloaded from your sensor is stored in the Reports

section of Aqua4Plus 2.0 for viewing and editing. The les

will be saved to default data folder on your PC as well. See Program Settings for default data folder location.

In the main view you’ll see a list of reports sorted by date,

size, or le name as selected here

PT2X-BV INSTRUCTIONS

Click to view data as a table

Click to view data statistics

The Information tab is a new feature allowing users to add

metadata to their reports such as site location, eld notes,

or comments.

You can also search reports by keyword using the search box

Click on a report to bring up the report details

Reports are displayed in graphing view by default. You can

zoom to specic sections by selecting a section with you

mouse or by adjusting the slider below the graph.

Click to switch to full screen graphing view

Graph saving and export options are available here

The Schedule tab will display the logging setup details for the report

Click Export to export the report as a .csv le or .a4d le for

distribution or use in 3rd party software.

Click Delete to delete the report from Aqua4Plus 2.0

You can also import .a4d les from compatible sensors into

Aqua4Plus 2.0 by clicking at the top of the Reports

screen.

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Page 15

OPERATION

Barometric Compensation

PT2X-BV INSTRUCTIONS

For PSIA sensors we’ve built a new barometric compensation

utility into the Reports section. Click on a report to

compensate the data for barometric pressure.

Corresponding barometric les are ltered by date/time

and displayed to the left. Select the barometric le you

would like to use to compensate the report, select either the

Submergence or Depth To Water tab, then click Continue.

Aqua4Plus 2.0 will perform the barometric compensation

and create a new compensated report. Original reports are

retained as uploaded.

Compensated report can then be viewed and exported as

needed.

If compensating for Depth to Water enter your depth

to water reference measurement and the date/time the

measurement was taken (typically taken with a water level

indicator before data is uploaded from the sensor) before

clicking Continue.

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Page 16

DIRECT READ MODBUS/SDI-12

PT2X-BV INSTRUCTIONS

Power Consideration

If your sensor does not have internal batteries and is not powered continuously by an auxiliary power supply, then you must turn power on to the sensor at least two seconds before a reading is to be taken to allow the sensor to warm up.

Reading Via Modbus® RTU

Setting Baud Rate

Your PT2X-BV comes congured to communicate at 38,400

baud, with 8 data bits, one stop bit, and no parity. The sensor can also be set to 19,200 or 9600 baud, if needed for your application. You must use Aqua4Plus 2.0 to make baud rate changes. See sensor settings

Taking Measurements

Reading Registers

Read measurements using Modbus function 03 – Read Holding Registers. Readings are located in two registers each, starting at address 62592. (PT2X-BV register addressing is zero based, i.e., starts at zero. If your equipment uses one based addressing, you will need to add one to the register addresses.)

Addresses for PT2X-BVs with rmware lower than

2.0

Zero based One based Pressure 62592 62593 Temperature 62594 62595

Addresses for PT2X-BVs with rmware 2.0 or

higher

Zero based One based Temperature 62592 62593 Pressure 62594 62595

Measurement Timing

When you request a reading via Modbus, the sensor wakes up, returns the current values in the registers, and then starts taking new readings and updating the registers. After approximately 10 seconds, if no more readings have been requested, the sensor goes back to sleep.

Because of this, the rst reading you get will be old. If you

are taking readings at intervals of less than 10 seconds,

simply ignore the rst reading — all remaining readings will

be current. On the other hand, if you are taking readings at intervals of greater than 10 seconds, take a reading, ignore it, wait one second, take another reading. Record this second reading.

Data Format

The data is returned as 32-bit IEEE oating-point values, highword rst, also referred to as big-endian or oat

inverse.

For further information and detailed Modbus examples, see Seametrics techinical bulletin on Direct Read, available from our web site at www.seametrics.com.

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Page 17

DIRECT READ MODBUS/SDI-12

PT2X-BV INSTRUCTIONS

Reading Via SDI-12

Note: The default units setting for pressure is PSI. The default units setting for temperature is Celsius. To change these, use the Direct Read Units in the Aqua4Plus 2.0 Control Software.

Addressing

Default SDI-12 Address: 1

SDI-12 Command Nomenclature

<a> = Sensor address

{crc} = SDI-12 compatible 3-character CRC

<cr> = ASCII carriage return character

<lf> = ASCII line feed character

highlighted values indicate variable data

SDI-12 Commands

Sensor Identication

<a>I! <a>13 INWUSA PT2X-BV

213ssssssssss<cr><lf>

Acknowledge Active, Address Query

?! <a><cr><lf>

Request Response

All SDI-12 requests consist of a command followed by a request for values. Some software or equipment may combine these, making the second one unnecessary. Refer to your software or equipment documentation for details.

Address

Command

Request Response

Address

Time until

response

(in seconds)

Address

Request for values read

Note: 213 will change to reect current rmware version. ssssssssss = device serial number

Address

Returned value(s)

Carriage Return

Linefeed

# of values to

be returned

Carriage Return

Linefeed

Change Address

<a>A<b>! <b><cr><lf> Change address to <b>

Request Measurement

<a>M! <a>0022<cr><lf> Request all measurements <a>D0! <a>+22.0512+12.0512<cr><lf> Read temperature and pressure

<a>M1! <a>0021<cr><lf> Request temperature measurement only <a>D0! <a>+22.0512<cr><lf> Read temperature

<a>M2! <a>0021<cr><lf> Request pressure measurement only <a>D0! <a>12.0512<cr><lf> Read pressure

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DIRECT READ MODBUS/SDI-12

Request Measurement with CRC

<a>MC! <a>0022<cr><lf> Request all measurements with CRC <a>D0! <a>+22.0512+12.0512{crc}<cr><lf> Read temperature and pressure

<a>MC1! <a>0021<cr><lf> Request temperature measurement only with CRC <a>D0! <a>+22.0512{crc} <cr><lf> Read temperature

<a>MC2! <a>0021<cr><lf> Request pressure measurement only with CRC <a>D0! <a>12.0512{crc} <cr><lf> Read pressure

Concurrent Measurement

<a>C! <a>0022<cr><lf> Request all measurements <a>D0! <a>+22.0512+12.0512<cr><lf> Read temperature and pressure

<a>C1! <a>0021<cr><lf> Request temperature measurement only <a>D0! <a>+22.0512<cr><lf> Read temperature

PT2X-BV INSTRUCTIONS

<a>C2! <a>0021<cr><lf> Request pressure measurement only <a>D0! <a>12.0512<cr><lf> Read pressure

Concurrent Measurement with CRC

<a>CC! <a>0022<cr><lf> Request all measurements with CRC <a>D0! <a>+22.0512+12.0512{crc}<cr><lf> Read temperature and pressure

<a>CC1! <a>0021<cr><lf> Request temperature measurement only with CRC <a>D0! <a>+22.0512{crc} <cr><lf> Read temperature

<a>CC2! <a>0021<cr><lf> Request pressure measurement only with CRC <a>D0! <a>12.0512{crc} <cr><lf> Read pressure

For further information and SDI-12 examples, see Seametrics application note, “PT2X SDI-12 Interface Specication” available from our web site at www.seametrics.com.

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MAINTENANCE

PT2X-BV INSTRUCTIONS

Removing Debris from End Cone (Tube version)

At times mud, silt, or other debris may foul the water inlets to the pressure element. The end cone can be removed to clean out the debris.

Twist Open Housing

1. Gently twist o end cone portion only - do not twist o pressure element!

2. Remove debris. Do not poke anything into the sensor. This can damage the sensor element and

void the warranty.

3. Replace and retighten the end cone.

Pressure element

Water inlet

End cone

Gently twist o the end cone and carefully remove debris

Changing Batteries

Battery Type: Two 1.5V AA batteries—Lithium or Alkaline

(lithium recommended)

IMPORTANT!

Because changing the batteries involves opening the water-tight seal, this must be done in a clean, dry environment to avoid contamination or moisture damage to the circuitry.

IF USING ALKALINE BATTERIES —

PREVENT BATTERY LEAKAGE!

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, remove the batteries.

Sensor

There are no user-serviceable parts, other than the batteries. If problems develop with sensor stability or accuracy, contact Seametrics. If the transducers have been exposed to hazardous materials, do not return them

without notication and authorization.

Cable (Cabled tube version)

Cable can be damaged by abrasion, sharp objects, twisting, crimping, crushing, or pulling. Take care during installation and use to avoid cable damage. If a section of cable is damaged, it is recommended that you send your sensor back to replace the cable harness assembly.

Battery Life Calculator (Firmware 2.13 or higher)

When changing batteries, it is important to reset the Battery Life Calculator. If the battery life calculator is not reset, the remaining life information will be incorrect.

Access the Battery Life Calculator from the Congure

Menu - Battery Information and Reset. If you have put in new batteries, checkmark the box “I have just put in fresh batteries.” Click Save and Close.

Be sure to reset the Battery Life Calculator

when changing batteries!

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Page 20

MAINTENANCE

PT2X-BV INSTRUCTIONS

Box Version

• Remove the four screws in the corners of the top cover.

• Remove top cover.

• The battery housing is secured using hook and loop fasteners. Pull gently to release.

• Remove screw on bottom of battery housing and slide housing open.

• Remove the batteries, taking note of polarity.

• Insert new batteries.

• Replace battery cover and screw.

• Secure on hook and loop fastener.

• Be sure battery switch is On.

• Replace top cover and screws. NOTE: The box is directionally keyed. Failure to replace the lid

correctly will prevent a tight seal and will result in water leakage.

On/O

Switch

Tube Version

Tips

• Never place a tool on the sensor body, it is very thin and will deform causing leaks at o-ring seals and potentially crushing the circuit board!

• Always twist the sensor body o the top cap assembly rather than twisting the top cap assembly

o of the sensor body.

• For cabled sensors, always clamp the sensor on the swaged area when applicable, the shoulder above it will allow you to press down without the worry of the sensor slipping out of the clamping device.

• If the sensor body is slippery or you are unable to grip it hard enough to twist, try a piece of rubber cabinet liner for additional friction.

There is a black, compressible square ring near the top of the sensor. This ring acts as a spring to lock the cable in. This needs to be compressed in order to allow removal of the top cap. Once this ring is compressed, a gentle counterclockwise twist is all that is needed to remove the cable from the sensor body. Compressing the black square ring does take force, twisting does not.

HousingTop cap

Key Slot

Battery Housing

Key Tab

Swage Knurling Black square ring

Cabled Sensor

Top cap

Knurling Black square ring

Housing

Cableless Sensor

Care must be taken to compress the black square ring before attempting to twist the housing. Forceful twisting

of the housing can permanently damage the sensor.

Securing the Sensor

In order to compress the black square ring, the sensor must be secured so that you can apply downward pressure to compress the ring. This can be done by holding in your hand, using a vise, or using pliers, as follows.

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MAINTENANCE

PT2X-BV INSTRUCTIONS

By Hand—cabled version only

1. Tightly grasp the top cap in one hand.

2. Brace your hand against something such as a table or the ground. (Do not allow the cable to be pinched against the brace.)