Geotech TempHion ISE User manual

Precision Environmental Sensors

An ON

CON Brand

PROUDLY

MADE

IN THE

USA

ISO

9001:2008

TempHion

pH/ORP (Redox) / ISE Smart Sensor

and Data Logger Instructions

TempHion pH/

ORP (Redox)

TempHion ISE

For Sales & Service Contact

2650 E. 40th Ave. • Denver, CO 80205

Phone 303-320-4764 • Fax 303-322-7242

1-800-833-7958

www.geotechenv.com

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 2 seametrics.com

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 3 seametrics.com

General Information

General Information ...................................................................................................................................................Page 4

Dimensions ....................................................................................................................................................................Page 4

Specications ................................................................................................................................................................Page 5

Initial Inspection and Handling..............................................................................................................................Page 6

Do’s and Don’ts............................................................................................................................................................Page 6

TempHion Reference Electrode..............................................................................................................................Page 7

General Precautions....................................................................................................................................................Page 7

Installation

Connecting External Power......................................................................................................................................Page 8

Connecting a TempHion to a Computer ............................................................................................................Page 8

Cable Wiring..................................................................................................................................................................Page 9

Installing Aqua4Plus or Aqua4Plus Lite Software ...........................................................................................Page 9

Using Without Aqua4Plus or Aqua4Plus Lite Software ................................................................................Page 9

Grounding Issues.........................................................................................................................................................Page 9

Installing the Sensor...................................................................................................................................................Page 10

Settings and Calibration

General Calibration Information............................................................................................................................Page 11

Important Calibration Notes ...................................................................................................................................Page 11

pH Channel ....................................................................................................................................................................Page 12

Pressure Channel .........................................................................................................................................................Page 12

ISE Channel ....................................................................................................................................................................Page 13

ORP (Redox) .................................................................................................................................................................Page 15

Operation

Collecting Data with Aqua4Plus and Aqua4Plus Lite ....................................................................................Page 16

Real Time Monitor.......................................................................................................................................................Page 16

Setting up Data Recording ......................................................................................................................................Page 16

Retrieving Data.............................................................................................................................................................Page 16

Viewing Data .................................................................................................................................................................Page 16

Exporting Data..............................................................................................................................................................Page 17

A Word about Units....................................................................................................................................................Page 17

Direct Read Modbus/SDI-12

Setting Units for Direct Read ..................................................................................................................................Page 17

Power Consideration ..................................................................................................................................................Page 18

Reading via Modbus RTU .........................................................................................................................................Page 18

Reading via SDI-12......................................................................................................................................................Page 19

Maintenance and Reference

Sensor/Cable/End Connections .............................................................................................................................Page 21

Care and Filling of Reference Solution................................................................................................................Page 21

pH Field Calibration Temperature Chart.............................................................................................................Page 22

M & I Range for pH Calibration.............................................................................................................................Page 22

How to Store and Recondition...............................................................................................................................Page 22

Changing Batteries......................................................................................................................................................Page 23

Troubleshooting

Problems/Probable Causes/Things to Try..........................................................................................................Page 26

TABLE OF CONTENTS

IF USING ALKALINE BATTERIES—PREVENT BATTERY LEAKAGE!

TempHion 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, remove the

batteries.

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 4 seametrics.com

GENERAL INFORMATION

The Seametrics TempHion™ Smart Sensor is a

microprocessor-based submersible sensor with built-in

data logging, storing thousands of records in non-volatile

memory. The pH/ORP version measures pH, ORP (Redox),

and temperature. The ISE version measures bromide and

temperature.

The internal processor in the TempHion allows for easy

calibration, using the calibration utilities in Aqua4Plus/

Aqua4Plus Lite. Once calibrated, this calibration data is

stored in non-volatile memory within the Smart Sensor.

When data is collected, this calibration information is

applied to the data, resulting in highly accurate readings at

a wide range of temperatures.

The TempHion is powered internally with two AA batteries.

Alternately it can be powered with an external auxiliary

power supply for data intensive applications. The unit is

programmed using Seametrics’ easy-to-use Aqua4Plus

or Aqua4Plus Lite control software. Once programmed

the unit will measure and collect data on a variety of time

intervals.

Several TempHions, or a combination of TempHions

and other Seametrics Smart Sensors, can be networked

together and controlled from one location directly from a

single computer.

While most will use the TempHion with our free, easy-

to-use Aqua4Plus Lite or Aqua4Plus software, it is by no

means limited to that software. You can use your own

Modbus®RTU or SDI-12 software or logging equipment to

read measurements, thus tying into your existing systems

and data bases.

Dimensions

17.96” (45.6 cm)

17.96” (45.6 cm) Diameter

0.75” (1.9 cm)

0.28” (0.7 cm)

Cableless

0.25” (0.6 cm)

Shorter

pH/ORP Version

ISE Version

pH/ORP element

ISE element

Reference Reservoir

Non-batttery versions are 3.8” (9.65 cm) shorter.

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 5 seametrics.com

Specications*

GENERAL INFORMATION

Housing & Cable Weight 0.8 lb. (0.4 kg)

Body Material Acetal & 316 stainless or titanium

Wire Seal

Material

Fluoropolymer and PTFE

Cable Submersible: polyurethane, polyethylene, or ETFE (4 lb./100 ft., 1.8 kg/30 m)

Field Connector Standard

Temperature Operating Range 0˚ to 55˚C (32˚ to 131˚F)

Storage Range Without batteries: –20˚ to 80˚C (–4˚ to 176˚F)

Power Internal Battery Two lithium ‘AA’ batteries - Expected battery life: 18 months at 15 min. polling interval (may vary do to

environmental factors)

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 - 200,000 records

Logging Types Variable, user-dened, proled

Logging Rates 2x/sec maximum, no minimum

Baud Rates 9600, 19200, 38400

Software Complimentary Aqua4Plus and Aqua4Plus Lite

Networking 32 available addresses per junction (Address range: 1 to 255)

File Formats .a4d and .csv (also .xls in Windows 8 and earlier)

Output Channels Temperature pH ORP Bromide

Element 30K ohm thermistor,

Epoxy bead/external

housing

Glass combination

electrode

Platinum ring Ag/AgCl solid-state

electrode (Ion electrode

method)

Accuracy ±0.2˚C ±0.2 pH units, 0.1% mV

value (typical)

0.1 mVH, 0.1% mV value

(typical)

±5.0% of measured value

(typical)

Resolution 0.1˚C 0.01 pH units 0.01 mVH units 0.1 ppm

Units Celsius, Fahrenheit,

Kelvin

pH, mV Eh, mV ppm, mV

Range 0˚ to 55˚C (32˚ to 131˚F) 0-14 pH units / -538 to

260 mV

± 1200 mV 0–10,000 ppm

Compensated --- 0˚ to 40˚C (32˚ to 104˚F) 0˚ to 40˚C (32˚ to 104˚F) Isopotential point

characterization

Calibration --- One or two point

calibration w/ pH buers

(4 & 7 or 7 & 10)

EH 1 pt. calibration One or two point

calibration w/ ionic

strength adjustment

Reference

Solution

Potassium Nitrate -

(KNO3)

Potassium Nitrate -

(KNO3)

Potassium Nitrate -

(KNO3)

Reference Ag/AgCl solid state electrode, capillary liquid junction, TempHion™ reference solution

Maximum Depth pH/ORP: 700 ft (210 m) / 300 psi, ISE: 230 ft (70 m)/100 psi

Environmental IP68, NEMA 6P

*Specications subject to change. Please consult out web site for the most current data (seametrics.com). Modbus is a registered trademark of Schneider Electric.

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 6 seametrics.com

GENERAL INFORMATION

Initial Inspection and Handling

Upon receipt of your smart sensor, 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, such as a cut cable.

If concealed damage is found, immediately le a claim with the carrier.

Check the label attached to the cable at the connector end for the proper cable length.

Do’s and Don’ts

Don’t drop into well

Lower gently to prevent

damage

Don’t scrape cable

over edge of well

May nick or fray the

cable

Don’t bend cable sharply

May weaken internal wires

Don’t support sensor

with the connector

Use a strain relief device

Do handle sensor with

care

Do store sensor in

a dry, inside area

when not in use. (See

also “How to Store” in

Maintenance section)

 

Do install sensor so the

connector end is kept

dry

 

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 7 seametrics.com

GENERAL INFORMATION

TempHion™ Reference Electrode

TempHion’s patented reference electrode is the key to

TempHion’s superior downhole/high pressure performance.

TempHion uses a long capillary pathway, initially lled

with reference electrode lling solution, to separate the

reference electrode chamber from the solution being

analyzed. In addition, TempHion’s reference electrode is

lled without any air (which is compressible). With this

construction, the principle mechanism that will eventually

allow test solution to enter the reference chamber and

contaminate the reference electrode lling solution is

diusion – an exceedingly slow mechanism. Further, while

the capillary pathway is narrow by garden hose standards,

its open cross-section is huge compared to the microscopic

openings in a conventional porous ceramic uid/uid

junction. It is therefore much less susceptible to fouling.

TempHion’s proven stability under actual eld conditions is

measured in weeks or months, rather than hours or days!

The gure below illustrates the construction of the

TempHion reference electrode. Please note that the

capillary pathway between the reference and test solutions

is established using a modied screw thread. This means

that the capillary can be easily opened up for cleaning,

relling, or other maintenance.

Reference Electrode Assembly: The modied thread provides

a continuous liquid path between the solution in which the

instrument is immersed and the reference element.

TempHions with standard pH elements, ISE elements,

and ORP elements come with the TempHion Reference

Electrode, as described above.

Reference

Electrode

Assembly

Liquid Junction Port

Outer Reference

Housing

Capillary Flow path

(Modied Thread)

Reference Electrode

Filling Solution

Reservoir

Reference Element

General Precautions

The rest of this manual includes step-by-step instructions

for setting up the TempHion calibrating it, and using it in

the eld. When reading and following the instructions in

these sections, keep these very important considerations

in mind:

• Do not handle the surfaces of the sensing

electrodes. Oils from ngers can “blind” the

reactive surface. Rough handling can scratch the

reactive surface.

• Use calibration standards that are accurately

prepared. Discard standards after use. Do not

return the used standards to the bottles of “fresh”

solution.

• When TempHion’s reference electrode contains

lling solution, the O-ring at the top of the

reference assembly must be in the upper position.

(See further details under Installation later in this

manual.)

• For any step-change in temperature (e.g., where

calibration standards are at a dierent temperature

than water to be tested) allow the instrument to

come to complete thermal equilibrium before

making measurements. Up to 30 minutes may be

required.

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 8 seametrics.com

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.

• Determine the port number to which the adapter is

assigned.

• Right-click on My Computer.

• From the popup menu, select Manage to open

the Computer Management window.

• On left panel, click on Device Manager.

• On right panel, double-click on Ports.

• A list of active COM ports will be displayed. Note

the COM number assigned to the adapter you

just installed.

For example:

• Close Manager.

• Connect to the sensor.

• On the Aqua4Plus software, select the COM port

noted above. (If you do not see your new COM port

in the dropdown box, open the Communications

dialog box from the Options menu. Increase the

Highest COM port number, up to a maximum of

15.)

Connecting sensor to your computer using

a USB to Serial adapter and an interface cable.

PC or Laptop

Computer

RS485/RS232

Adapter

Interface Cable

Serial Port

Sensor

Screw-

Sensor

cap

Cableless

Conguration

Interface

Cable

PC or Laptop

Computer

USB PortUSB-to-Serial

Adapter

RS232/RS485

Adapter

Sensor

Screw-

Sensor

cap

Cableless

Conguration

INSTALLATION

Connecting External Power

The TempHion 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 TempHion to a Computer

Cabled sensors are terminated with a weather-resistant

connector. Cableless sensors are terminated with a weather-

resistant connector that is inside a screw-cap. Connect the

weather-resistant connector to your computer’s USB port

as shown below.

Connecting sensor to your computer using

Seametrics’ USB to RS485 adapter.

Aqua4Plus and Aqua4Plus Lite 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 or Aqua4Plus

Lite to install the drivers. In Aqua4Plus, select Install USB/

RS485 Drivers from the Utilities menu; in Aqua4Plus Lite,

select the same from the Program Conguration menu.

Select your operating system, and then click Install.

Alternate Connection Options

Seametrics recommends connecting the sensor to your

computer using the Seametrics USB cable. However, when

using Aqua4Plus, the sensor can also be connected using

an RS232 serial port or a USB-to-Serial cable, as described

below. (Note: Aqua4Plus Lite can only communicate using

the Seametrics USB cable.)

Connecting via RS232 Serial Port

Connect the weather-resistant connector to your

computer’s serial port as shown below.

PC or Laptop

Computer

USB Port

USB to RS485

Adapter

Sensor

Cableless

Conguration

Screw-

Sensor

cap

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 9 seametrics.com

INSTALLATION

Cable Wiring

If you buy your cabled sensor with a connector installed

(the normal conguration), no further wiring is needed.

For reference purposes, the rst two diagrams below show

the pinout from the connector for various scenarios. The

nal diagram shows the pinout if you bought your sensor

without a connector for use with SDI-12.

For Modbus®—with 5-pin connector

For SDI-12—with 5-pin connector

For SDI-12—without connector

White

Purple

Yellow

Brown

Blue

Shield

12 VDC+ (Vaux)

Modbus D- (Not used)

Modbus D+ (Not used)

SDI-12 Signal

12 VDC- (GND)

Earth ground

White

Purple

Yellow

Brown

Blue

Shield

12 VDC+ (Vaux)

Modbus D- (Not used)

Modbus D+ (Not used)

SDI-12 Signal

12 VDC- (GND)

5-Pin

Connector

White

Purple

Yellow

Brown

Blue

Shield

12 VDC+ (Vaux)

Modbus D-

Modbus D+

SDI-12 (Not used)

12 VDC- (GND)

5-Pin

Connector

Installing Aqua4Plus or Aqua4Plus Lite Software

The TempHion comes with the Aqua4Plus or Aqua4Plus

Lite 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 or Aqua4Plus Lite.

Using TempHion Without Aqua4Plus or Aqua4Plus Lite

Most users will use the TempHion with Seametrics’

Aqua4Plus or Aqua4Plus Lite software. However, the

TempHion is quite versatile, communicating via either

Modbus®or SDI-12 interfaces, allowing you to do the

following:

• Read a TempHion via Modbus®using your own

software.

• Read a TempHion via SDI-12 protocol.

• Display readings from a TempHion on a panel

meter.

If you want to use one of these methods, see the chapter

Direct Read Modbus®/SDI-12.

Grounding Issues

It is commonly known that when using electronic

equipment, both personnel and equipment need to be

protected from high power spikes that may be caused by

lightning, power line surges, or faulty equipment. Without

a proper grounding system, a power spike will nd the path

of least resistance to earth ground—whether that path is

through sensitive electronic equipment or the person

operating the equipment. In order to ensure safety and

prevent equipment damage, a grounding system must be

used to provide a low resistance path to ground.

When using several pieces of interconnected equipment,

each of which may have its own ground, problems with

noise, signal interference, and erroneous readings may be

noted. This is caused by a condition known as a Ground

Loop. Because of natural resistance in the earth between

the grounding points, current can ow between the points,

creating an unexpected voltage dierence and resulting

erroneous readings.

The single most important step in minimizing a ground loop

is to tie all equipment (sensors, dataloggers, external power

sources, and any other associated equipment) to a single

common grounding point. Seametrics recommends

connecting the shield to ground at the connector end.

TEMPHION INSTRUCTIONS

Seametrics • 253.872.0284 Page 10 seametrics.com

INSTALLATION

Installing the Sensor

The black reference reservoir at the lower end of the

TempHion Smart Sensor is shipped lled with Seametrics

reference solution. (If your reference reservoir is not lled,

see the Maintenance section in this manual.) The black

reference assembly has two grooves. The upper groove

contains a small hole that forms the liquid junction port.

During shipping and storage, an o-ring is located in the

upper groove, preventing reference solution leakage and

contamination. Be sure to move the o-ring to the lower

groove before deploying, thus exposing the liquid junction

port. If the o-ring continues to cover the opening, readings

will not be representative or accurate.

Be sure to move the o-ring to the lower groove before

deploying, thus exposing the liquid junction port.

Lower the sensor to the desired depth. Fasten the cable

to the well head using tie wraps or a weather proof strain-

relief system. (Note that for shallow installations the liquid

in which the sensor is submerged must, at all times, reach

high enough to cover the sensing element cutout.)

Be sure the supplied cap is securely placed on the weather-

resistant connector at the top of the cable. Do not install

such that the connector might become submerged with

changing weather conditions. The connector can withstand

incidental splashing but is not designed to be submerged.

Note about Calibration

The TempHion must be calibrated before deploying.

The TempHion has one temperature channel and four

millivolt channels. The millivolt channels can be congured

to measure pH, ORP (Redox), or various selected

ions. Before leaving the factory, your sensor has been

congured specically for you. All unneeded channels

have been disabled, and the active channels have been

pre-congured. Disabled channels will not display in

Aqua4Plus/Aqua4Plus Lite. (Note: Some older TempHions

may have more channels. If yours has more channels, refer

to the documentation that came with the unit or contact

Seametrics for more information.)

All active channels can be calibrated in the eld.

Temperature channels rarely need calibrating, however the

pH, ORP (Redox), and ISE channels should be calibrated

before rst use and periodically thereafter.

See the next section, “Settings and Calibration” for detailed

calibration instructions.

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