Seametrics TempHion User manual

PROUDLY
MADE
IN THE
USA
C
e
r
t
i
f
i
e
d
C
o
m
p
a
n
y
ISO
ISO
9001
TempHionTempHion
pH/ORP (Redox) / ISE Smart SensorpH/ORP (Redox) / ISE Smart Sensor
and Data Logger Instructionsand Data Logger Instructions

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 Calibration...............................................................................................................................................................Page 12
Redox/ORP Calibration..............................................................................................................................................Page 13
ISE-Bromide Calibration............................................................................................................................................Page 14
Operation
Real-time Data..............................................................................................................................................................Page 15
Data Logging.................................................................................................................................................................Page 15
Program Settings.........................................................................................................................................................Page 17
Direct Read Modbus/SDI-12
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
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.
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 replaceable
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 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 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)
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 replaceable lithium ‘AA’ batteries - Expected battery life: 18 months at 15 min. polling interval (may
vary do to environmental factors)
Auxiliary 12 Vdc - Nominal, 9-15 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
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
INSTALLATION
Connecting External Power
The TempHion comes with two replaceable1.5V AA internal
batteries.
If auxiliary power is desired, you can use a 9-15 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 communicates 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 to install the drivers.
Cap
Sensor
Cableless
Configuration
PC or Laptop
USB Port
USB to RS485
Adapter
Sensor
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.

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)
1
2
3
4
5
5-Pin
Connector
White
Purple
Yellow
Brown
Blue
Shield
12 VDC+ (Vaux)
Modbus D-
Modbus D+
SDI-12 (Not used)
12 VDC- (GND)
1
2
3
4
5
5-Pin
Connector
Installing Aqua4Plus Software
The TempHion comes with the Aqua4Plus 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.
Using TempHion Without Aqua4Plus
Most users will use the TempHion with Seametrics’
Aqua4Plus 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.
(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.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 11 seametrics.com
General Calibration Information
The TempHion must be calibrated before rst use and
periodically thereafter. It should also be calibrated if moving
to a dierent sampling environment where readings will
be signicantly dierent than the current environment.
Environmental conditions of turbulence and temperature
swings, as well as local likelihood for bio-fouling or
mineral deposition, can vary considerably from site to site.
Therefore, where the sensor is to be used for long-term
monitoring, it is recommended that the calibration be
initially checked frequently until a performance history is
established.
Aqua4Plus provides an easy-to-use calibration calculator
for performing one- or two-point in-eld calibrations.
Two-point calibrations are more accurate and should be
used whenever possible.
Field calibration is performed on each channel separately.
To calibrate a specic channel, select Settings and
Conguration from the Congure Menu in Aqua4Plus and
then click on the channel to be calibrated.
SETTINGS AND CALIBRATION
IMPORTANT CALIBRATION NOTES!
Data Files
• Calibration can only be done when
there is no data stored on the sensor.
Retrieve any data you want and then
erase the data before continuing.
Filling Solution Reservoir
• In order for the TempHion Smart
Sensor to calibrate and function
correctly, the lling solution reservoir
must be properly lled with reference
solution. For details, see Maintenance
section.
• Be sure the o-ring on the black
reference housing has been moved to
the lower groove, exposing the liquid
junction port.
Calibration Buers and Solutions
• Refer to the following sections for
specic solutions and buers.
• Important! The sensor and all
calibration buers and solutions
should be at the same temperature
before and during calibration.
Reconditioning
• If your reference electrode has been
stored dry or in KCl solution, you
should let it sit at least a half hour
after lling with reference solution
before using or calibrating.
• If your pH sensor has been stored
with the bulb dry, you should soak it
in your rst pH buer for about four
hours to recondition the bulb before
calibrating.
• If your ISE sensor has been stored with
the element dry, you should soak it
in your rst calibration solution for
at least a half hour before using or
calibrating.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 12 seametrics.com
SETTINGS AND CALIBRATION
Enter your rst point pH value in the Ref. Point box,
next click Measure. Aqua4Plus will take 10 readings and
display the average. Watch for stability while Aqua4Plus is
measuring to ensure an accurate calibration. To accept the
rst point reading click Ok. If only performing a 1 point
calibration click Apply to save new calibration values then
close the calibration window, otherwise proceed to the 2nd
point by clicking Next.
Place the sensor in your second point buer and allow a
few minutes for it to acclimate. Enter the pH value of the
buer in the Ref. Point box and click Measure.
pH Calibration
To perform a pH calibration, rst connect to your TempHion
and ensure all data has been uploaded and erased from
the sensor. Seametrics recommends pH buers of 4, 7,
and 10 for calibration. For a one-point calibration, select
the buer closest to the expected values in your samples.
For a two point calibration, select the two buers that
most closely bracket the expected values in your samples.
Seametrics recommends a 2 point calibration that brackets
the expected pH range of your site.
Note: If your TempHion has been stored dry, a 4 hour to
overnight soak in pH 4 buer is needed to recondition the
pH bulb.
Prepare your pH buer(s) and place the sensor in your
rst point calibration standard, ensure that that the pH
bulb is fully submerged, than allow a few minutes for the
temperatures to equalize. Check for stable readings under
Real-time Data.
Next select the calibration button.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 13 seametrics.com
SETTINGS AND CALIBRATION
Aqua4Plus will take 10 readings and display the average.
Watch for stability while Aqua4Plus is measuring to ensure
an accurate calibration. To accept the second point reading
click Ok. Your new oset and slope values will appear
to the right, click Apply to conrm your new slope and
oset values. Aqua4Plus will provide a real time reading
to verify calibration was successful. You may now close the
calibration window and proceed with deployment.
Redox/ORP Calibration
Note on units: The display unit “Eh” refers to readings
in millivolts referenced to a hydrogen electrode. In other
words, Eh represents millivolt readings that would have
been obtained if using a hydrogen electrode and will
apply the needed oset to the readings after calibration.
The units “mV” are raw millivolt readings from the sensor
and will not apply any calibration osets. From the
program settings, set the display units to either mV or
Eh, whichever you will be using.
DO NOT USE ZOBELL SOLUTION!
Zobell solution and other Redox standards may foul the
TempHion’s electrodes. For Redox/ORP calibration a
secondary meter should be used to obtain the reference
point value. Use a Redox/ORP meter that is calibrated to
your desired Redox/ORP scale to obtain this value.
Place both the TempHion and the reference meter into
your sample (ideally the waters the TempHion will be
installed in). Once readings have stabilized note the value
on the reference meter. Open the calibration window and
select the ORP tab, then enter reference meter reading in
the Ref. Point box. Next click Measure.
Aqua4Plus will take 10 readings and display the average.
Watch for stability while Aqua4Plus is measuring to ensure
an accurate calibration. To accept the reading click Ok, your
new oset value will appear to the right. Click Apply to
conrm your new oset value and Aqua4Plus will provide
a real time reading to verify calibration was successful. You
may now close the calibration window and proceed with
deployment.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 14 seametrics.com
SETTINGS AND CALIBRATION
ISE-Bromide Calibration
Seametrics recommends using the “known addition method”
for preparing calibration solutions. Using this method, the
sensor is placed in 100 mL of distilled or deionized water
(depending on the container used, more DI water may be
needed. Simply scale the following measurements up as
needed to fully submerge the electrode). A small amount
of standard is added to create a known concentration. The
rst point is measured. An additional amount of the same
standard is added to create a second known concentration.
The second point is measured. Seametrics recommends
0.1 Molar NaBr (equates to 7990 ppm). The following
instructions are based on using this standard. If you use a
dierent standard, or prefer not to use the known addition
method, you must use some other method to determine
the concentration used for the rst and second point when
calibrating. Seametrics recommends performing a 2 point
calibration for Bromide.
Prepare your rst point standard by adding 1mL of 0.1
Molar NaBr standard per 100 mL of DI water to your
container. Accurate measurement of both the DI water
and NaBr solution are extremely important for Bromide
calibration, Seametrics recommends using a lab grade 100
mL ask for DI water and pipette for the NaBr solution.
Place the TempHion in the standard and use it to stir the
solution well. Allow a few minutes for temperature to
equalize and readings to stabilize.
Note: If your TempHion has been stored dry you will
want to leave it to soak in the rst point for about 30
minutes to recondition the Bromide electrode.
Once temperature and readings appear stable enter your
rst point value in the Ref. Point box, for 0.1 Molar NaBr
this equals 79.1 ppm. Next click Measure.
Aqua4Plus will take 10 readings and display the average.
Watch for stability while Aqua4Plus is measuring to ensure
an accurate calibration. To accept the reading click Ok,
your new oset value will appear to the right. Click Next to
continue on to the 2nd point. If only performing a 1 point
calibration click Apply to conrm your new oset value
and Aqua4Plus will provide a real time reading to verify
calibration was successful.
To prepare the second point standard simply add an
additional 10 mL of 0.1 Molar NaBr per 100 mL of DI water
to your rst point solution. Stir well using the TempHion to
ensure the solution is fully mixed. Allow a few minutes for
the TempHion to acclimate to this solution then enter your
reference value in the Ref. Point box, for 0.1 Molar NaBr
this equals 791.8 ppm. Next click Measure.
Aqua4Plus will take 10 readings and display the average.
Watch for stability while Aqua4Plus is measuring to
ensure an accurate calibration. To accept the reading click
Ok, your new slope and oset values will appear to the
right. Click Apply to conrm your new slope and oset
values and Aqua4Plus will provide a real time reading to
verify calibration was successful. You may now close the
calibration window and proceed with deployment.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 15 seametrics.com
OPERATION
Real-time Data
Connect to sensor and select the Real-time data tab
To start real-time readings click Start, readings default to
table view. To switch to Real-time graphing view click the
graph icon
Real-time readings default to a 1 second interval for 1
minute, to adjust enter your desired settings here:
To save this data to the Reports section click the button
located next to the Single button in the Real-Time tab.
This will permanently save this real-time data set to your
Reports database.
Data Logging
Select Set Up Logging from the sensor screen. 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.
Set 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.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 16 seametrics.com
OPERATION
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 shown on the right.
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.
Data le name defaults to Test File # and may be re-
named here.
Click to switch between interval and continuous data
recording (supported sensors only) Select your continuous
rate from the drop down box (on the right).
Duration can be set by either number of records or by
setting a duration time, as shown on the right.
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.
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.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 17 seametrics.com
OPERATION
Program Settings
To view/change Aqua4Plus 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.
Uncheck the Allow app to collect anonymous usage
statistics box if you would like to opt out. This information
is used to track Aqua4Plus 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.
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.
To restore factory default settings click
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.
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.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 18 seametrics.com
DIRECT READ MODBUS & SDI-12
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 application note, available on our website
at www.seametrics.com.
Register Addresses with Firmware prior to 2.5
Zero based One based
Temperature 62592 62593
pH (in mV) 62594 62595
ISE (in mV) 62596 62597
ORP (in mV) 62598 62599
pH (in pH units) 62600 62601
ISE (in ppm) 62602 62603
ORP (in Eh) 62604 62605
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 TempHion 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 to
make baud rate changes.
If needed, set your TempHion to the desired baud rate in
user 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. (TempHion 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.)
Register Addresses with Firmware 2.5 or higher
Zero based One based
Temperature 62592 62593
pH (in pH units) 62594 62595
ISE (in ppm) 62596 62597
ORP (in Eh) 62598 62599
pH (in mV) 62600 62601
ISE (in mV) 62602 62603
ORP (in mV) 62604 62605

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 19 seametrics.com
SDI-12 Commands
Sensor Identication
<a>I! <a>13 INWUSA TempHi206ssssssssss<cr><lf> Note: 206 will change to reect current
rmware version.
ssssssssss = device serial number
Acknowledge Active, Address Query
<a>! <a><cr><lf>
?! <a><cr><lf>
Change Address
<a>A<b>! <b><cr><lf> Change address to <b>
Request Measurement
<a>M! <a>0024<cr><lf> Request all measurements
<a>D0! <a>+21.345+7.181+.053+.459<cr><lf> Read: temperature, pH (in pH units), (ISE in
ppm), ORP (in Eh)
<a>M1! <a>0024<cr><lf> Request all measurements
<a>D0! <a>+21.345-134.458+100.48+.84.404<cr><lf> Read: temperature, pH (in mV), (ISE in mV),
ORP (in mV)
Reading via SDI-12
SDI-12 commands always return values for all four TempHion channels – temperature, pH, ORP, and ISE channels.
Most TempHions are congured either as temperature, pH, and ORP or just temperature and Bromide. You will need to
disregard the readings for the channel(s) you do not have congured on your unit.
Note: The default units for temperature is Celsius. To change this, use the Direct Read Units option in the Aqua4Plus
Control Software. When using the M!, MC!, C!, or CC! command, all mV channels will report in either pH, ppm, or Eh,
depending on the channel type (pH = pH, ORP = Eh, ISE = ppm). When using the M1!, MC1!, C1!, or CC1! command, all
mV channels will report in mV.
DIRECT READ MODBUS & SDI-12
Addressing
Default SDI-12 Address: 0
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
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.
<a>D0! <a>+7.15863<cr><lf>
Request Response
Address
Request for
Address
Returned
value(s)
Carriage Return
Linefeed
values read
<a>M1! <a>0021<cr><lf>
Request Response
Address
Command
Address
Time until
response
Carriage Return
Linefeed
# of values to
be returned
(in seconds)
Note: For rmware version 2.0–2.3, the M!
and M1! commands are reversed. Likewise
for the MC!/MC1!, C!/C1!, and CC!/CC1!
commands.

TEMPHION INSTRUCTIONS
Seametrics • 253.872.0284 Page 20 seametrics.com
DIRECT READ MODBUS & SDI-12
Request Measurement with CRC
<a>MC! <a>0024<cr><lf> Request all measurements
<a>D0! <a>+21.345+7.181+.053+.459 {crc}<cr><lf> Read: temperature, pH (in pH units), (ISE in
ppm), ORP (in Eh)
<a>MC1! <a>0024<cr><lf> Request all measurements
<a>D0! <a>+21.345-134.458+100.48+.84.404 {crc} <cr><lf> Read: temperature, pH (in mV), (ISE in mV),
ORP (in mV)
Concurrent Measurement
<a>C! <a>0024<cr><lf> Request all measurements
<a>D0! <a>+21.345+7.181+.053+.459<cr><lf> Read: temperature, pH (in pH units), (ISE in
ppm), ORP (in Eh)
<a>C1! <a>0024<cr><lf> Request all measurements
<a>D0! <a>+21.345-134.458+100.48+.84.404<cr><lf> Read: temperature, pH (in mV), (ISE in mV),
ORP (in mV)
Concurrent Measurement with CRC
<a>CC! <a>0024<cr><lf> Request all measurements
<a>D0! <a>+21.345+7.181+.053+.459 {crc}<cr><lf> Read: temperature, pH (in pH units), (ISE in
ppm), ORP (in Eh)
<a>CC1! <a>0024<cr><lf> Request all measurements
<a>D0! <a>+21.345-134.458+100.48+.84.404 {crc} <cr><lf> Read: temperature, pH (in mV), (ISE in mV),
ORP (in mV)