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INW AquiStar TempHion, Instruction Manual

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INW AquiStar TempHion Instruction Manual Download Page 24

 

INW - TempHion Instruction Manual 

23

Redox (ORP) Channel Calibration

Note on units:  The 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.  The units “mV” are  

 

direct millivolt readings from the sensor. From the program, set the 

  

display units to either mV or Eh, whichever you will be using on your

 

alternate redox meter.

— For Calibration You Will Need—

•  A beaker or bucket of a sample that is representative of what will be measured 

with the sensor. 

DO NOT USE ZOBELL SOLUTION!

•  An alternate redox meter.
•  Distilled or deionized water.
• Paper 

towels.

— Computing Calibration Value—

Note:  When calibrating a redox channel, do not use the built-in calculator in the 
Settings and Calibration Window.  Instead, follow the instructions below.

•  Rinse sensor with distilled or deionized water, and then pat dry with clean paper 

towels.

•  Place the sensor in sample.  (Solution must be deep enough to cover the element 

cutout.)

•  Using the alternate meter, take a measurement of that sample.  Use either plain 

mV or Eh, whichever you normally use.

•  Open the Settings and Calibration window.
•  Click on the redox (ORP) channel, and then enter a zero in the offset box.
• Click 

OK

.

•  Take two or three single readings using the Real Time monitor and note the 

redox value.

•  Subtract this value from the value read by the alternate meter.

— Applying Calibration —

•   Re-open the Settings and Calibration window.
•   Click on the redox channel, and then enter this value in the offset box.
•  

Click 

OK

 

to save the value to the sensor!!!

— Verifying Calibration —

•  Take another couple single Real Time readings.  These should be close to the 

reading taken with the other meter.

Summary of Contents for AquiStar TempHion

Page 1: ...INW TempHionTM Smart Sensor ph ISE Redox ORP INSTRUCTION MANUAL ...

Page 2: ...dix B Settings and Calibration 17 Calibration Overview 17 Settings and Calibration Window and Calculator 18 Temperature Channel Calibration 18 pH Channel Calibration 18 ISE Channel Calibration 20 Redox ORP Channel Calibration 23 Appendix B1 pH Field Calibration Temperature Chart 24 Appendix B2 M I Range for pH Calibration 24 Appendix C Elements Reference Solutions and Related Settings 25 Appendix ...

Page 3: ... the manufacturer No part of this manual may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying and recording for any purpose without the express written permission of the manufacturer 1997 2016 Seametrics All rights reserved Registered trademarks and trademarks belong to their respective owners ...

Page 4: ... System The internal processor in the TempHionTM Smart Sensor 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 Initial In...

Page 5: ...on and contraction caused by temperature variations can augment the effects of diffusion Nevertheless TempHion s proven stability under actual field conditions is measured in weeks or months rather than hours or days The figure below illustrates the construction of the TempHionTM reference electrode Please note that the capillary pathway between the reference and test solutions is established usin...

Page 6: ...rs can blind the reactive surface Rough handling can scratch the reactive surface Avoid long term exposure of silver based sensing electrodes to bright sunlight 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 filling solution the o ring at the top of the...

Page 7: ...comes with the Aqua4Plus Aqua4Plus Lite host software to be installed on your PC or laptop Use this software to calibrate the sensor to program the datalogger to retrieve data from the logger to view collected data and to export data to external files for use with spreadsheets or databases Refer to the software manuals for details on installing and using the program Calibration The TempHion has on...

Page 8: ...ontains 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 ...

Page 9: ...ata Recording Click the tool button A Logging Schedule Window will open Refer to the software manuals for details in describing your schedule Click the Start button to send the schedule to the sensor and begin recording Using the Logging Schedule Window describe the test steps for your particular test Click Single to get a single reading Click Start to get a reading once a second for 60 seconds Cl...

Page 10: ...ol button Select a file location Click Save Click Start Select the data file you are ready to retrieve Viewing Data Click the or tool button to view data as a table Click the tool button to view data as a graph Navigate to the desired file then click the Open button The File Display Window displays your data in a tabular format ...

Page 11: ...onTM Smart Sensor can be displayed in various units Select the units you want from the Options Display Units menu or from the Configure Menu Program Configuration Set Computer Display Units pH pH or mV ISE ppm or mV Redox Eh or mV Temperature Degrees Celsius Fahrenheit Kelvin or ohms When using pH ppm or Eh units all readings are automatically compensated for temperature and all field calibration ...

Page 12: ...ution may need to be replaced We also recommend replacing the filling solution when doing periodic calibrations The TempHion is normally shipped with a bottle of INW Reference Solution If you will be using a different solution contact INW for any adjustments that may be needed Emptying and Cleaning the Reservoir Rinse the reference electrode and the inside of the cap with distilled or de ionized w...

Page 13: ... that no air bubbles are trapped in side If any air bubbles are trapped a proper electrical connection cannot be made and the sensor may read erratically Once filled be sure the o ring is in the upper groove to prevent reference solution leakage and contamination Before deploying be sure to move the o ring to the lower groove to expose the liquid junction port Be sure to move the o ring to the low...

Page 14: ...an dry environment to avoid contamination or moisture damage to the circuitry Refer to Appendix G for details on changing batteries PREVENT BATTERY LEAKAGE Under some circumstances the internal 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 de...

Page 15: ... 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 1 2 3 4 5 5 Pin Connector White Purple Yellow Brown Blue Shield may be green 12 VDC Vaux Modbus D Not used Modbus D Not used SDI 12 Signal 12 VDC Gnd Earth ground For Modbus with 5 pin connector White Purple Yellow Brown Blue Shield 12 VDC Vaux Modb...

Page 16: ... RS485 Modbus Available Channels Temperature pH and ORP Temperature ISE Operating Temperature Range 0 C to 55 C Storage Temperature Range1 20 C to 80 C Reference Electrode Ag AgCl solid state electrode Junction Patented capillary liquid junction Electrolyte TempHionTM reference solution Maximum Depth pH ORP 700 ft 210 m 300psi ISE 230 ft 70 m 100 psi LOGGING Memory 4MB 400 000 records Logging Rate...

Page 17: ...tion 0 1 ppm Thermal Compensation Isopotential point characterization Calibration 1 2 point method w ionic strength adjustment Reference Solution Chloride ION Plus B Reference Solution Bromide Potassium Nitrate KNO3 pH REDOX Sensor Type Material pH Glass combination electrode Redox Platinum ring Ranges pH 0 14 pH units 538mV to 260mV Redox 1200mV Units pH pH mV Redox Eh mVH mV Typical Accuracy pH ...

Page 18: ...on Smart Sensor to calibrate and function correctly the filling solution reservoir must be properly filled with reference solution For details see earlier in this manual Be sure the o ring on the black reference housing has been moved to the lower groove exposing the liquid junction port The sensor and all calibration buffers and solutions should be at the same temperature before and during calibr...

Page 19: ...pH buffers of 4 7 and 10 for calibration For a one point calibration select the buffer closest to the expected values in your samples For a two point calibration select the two buffers that most closely bracket the expected values in your samples Before calibrating check the chart in Appendix B2 for the range of M and I values you can expect to obtain during calibration IMPORTANT The pH of any buf...

Page 20: ...sferred to the calibration fields Click OK to save the values to the sensor Verifying Calibration Values Using the Real Time Monitor take a few readings while the sensor is still in the buffer Be sure units are set to pH Readings should be very close to your selected buffer Two Point Calibration First Calibration Point Prepare first buffer Rinse sensor first with distilled water and then with smal...

Page 21: ...itor take a few readings while the sensor is still in the buffer Be sure units are set to pH Readings should be very close to your selected buffer ISE Channel Calibration Introduction to ISE Calibration INW recommends using the known addition method for preparing calibration solutions Using this method the sensor is placed in 100 mL of distilled or de ionized water A small amount of standard is ad...

Page 22: ...rst point enter the concentration you have chosen Click the first Measure button Readings will be in mV When readings have stabilized to your satisfaction click the OK button on the pop up box Applying Calibration Values Observe the I value in the right hand section of the calculator For Chloride I should be between 120 and 160 Click the Apply button to apply calibration values The reference value...

Page 23: ...pm Chloride 99 0 ppm Stir to distribute standard evenly Allow time for sensor to stabilize 15 20 minutes In the Ref ppm box for the second point enter the concentration you have chosen Click the second Measure button When readings have stabilized to your satisfaction click the OK button on the pop up box Applying Calibration Values Observe the M and I values in the right hand section of the calcul...

Page 24: ...calculator in the Settings and Calibration Window Instead follow the instructions below Rinse sensor with distilled or deionized water and then pat dry with clean paper towels Place the sensor in sample Solution must be deep enough to cover the element cutout Using the alternate meter take a measurement of that sample Use either plain mV or Eh whichever you normally use Open the Settings and Calib...

Page 25: ...n the chart below when you calibrate the sensor To determine which configuration you have you will need to create a short data file then retrieve and export the data it doesn t matter whether the sensor is deployed or in a buffer or just in air for this Once you have exported your data file open it in Excel and note the P and H values for the pH channel If P 2 97 and H 0 567 this is the preferred ...

Page 26: ...ng of the reference solution reservoir The following chart shows the reference solution that should be used with various elements There are also specific settings that are set under Advanced Calibration These are set at the factory to match your element and need not be changed by the user P 2 97 H 0 567 P 2 389 H 0 29 P 6 76 H 0 567 Range for M 53 to 57 50 to 60 50 to 60 Range for I 240 to 270 180...

Page 27: ...s experience the bulb should last roughly two years if typically stored dry ISE Storing dry is best Reconditioning Reference Electrode If stored dry or in KCl refill per maintenance section earlier in this manual Once refilled let sit for 30 minutes before using If stored in reference solution no reconditioning is needed pH bulb ORP If stored dry soak in 1st buffer for 4 hours before calibrating M...

Page 28: ...485 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 INW has tested and recommends the Keyspan USA 19HS It is available from INW as well as from many sites on the Internet Install as follows Plug into USB port Install the drivers provided with the ...

Page 29: ... box open the Communications dialog box from the Options menu Increase the Highest COM port number up to a maximum of 15 Connect the sensor to your computer using a USB to Serial adapter and an interface cable Interface Cable PC or Laptop Computer USB Port USB to Serial Adapter RS232 RS485 Adapter Sensor Screw Sensor cap Cableless Configuration ...

Page 30: ...hannel is always temperature The Temperature channel by default uses degrees Celsius If you want to change to different units for example degrees Fahrenheit set these units using Aqua4Plus Aqua4Plus Lite From Aqua4Plus select Direct Read Units from the Configure Advanced menu From Aqua4Plus Lite select Set Direct Read Units from the Sensor Configure menu On the popup box click the down arrows next...

Page 31: ...to talk to it with Aqua4Plus until you change the baud rate for Aqua4Plus as follows Click the Options menu and then select Baud Rate On the popup box click the down arrow select the baud rate you need and then click OK The current Aqua4Plus baud rate is displayed in the lower right corner of the main program window Taking Measurements Reading Registers Read measurements using Modbus function 03 R...

Page 32: ...sted the sensor goes back to sleep Because of this the first reading you get will be old If you are taking readings at intervals of less than 10 seconds simply ignore the first 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 Da...

Page 33: ...nnels will report in mV 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 SDI 12 Commands Sensor Identification a I a 13 INWUSA TempHi206ssssssssss cr lf note 206 will change to reflect current firmware revision ssssssssss de...

Page 34: ...ature pH in pH units ISE in ppm ORP in Eh a C1 a 00204 cr lf request measurements a D0 a 21 34 134 458 100 48 84 404 cr lf read Temperature pH in mV ISE in mV ORP in mV Concurrent measurement with CRC a CC a 00204 cr lf request all measurements w CRC a D0 a 21 345 7 181 053 459 431 crc cr lf read Temperature pH in pH units ISE in ppm ORP in Eh a CC1 a 00204 cr lf request measurements w CRC a D0 a ...

Page 35: ... rubber cabinet liner for additional friction Opening the Housing 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 sq...

Page 36: ... the next page With Vise recommended method Cabled Sensor 1 If possible use a set of soft jaws as shown to prevent marring the surfaces of the top cap assembly 2 Place the sensor in a vise clamping gently on the swaged area You do not need to clamp the vise very hard Continue to Removing the Housing on the next page Cableless Sensor 1 If possible use a set of soft jaws as shown to prevent marring ...

Page 37: ...e swaged area do not grab the knurled diameter 2 Find a hard edge and place the tips or side of the jaws of the pliers onto this edge as shown This will allow you to press down with your weight to compress the square ring Continue to Removing the Housing below Cableless Sensor 1 Leave the cableless cap on in order to protect the pins inside 2 Grasp the pliers on the knurled area tightly being care...

Page 38: ...nd tuck the wiring into the cutaway on the circuit board with your thumb to protect it while being installed back into the housing 5 Rotate the top cap assembly into the opening in the housing being very careful not to nick or pinch any wires 6 Gently press down until the assembly stops and then twist it into place It will click in and decompress the gasket when it is fully engaged Pull wires gent...

Page 39: ...38 INW TempHion Instruction Manual Reordering Information For sales service offices please contact INW A Division of Seametrices www inwusa com 800 776 9355 ...

Page 40: ...s altered or repaired by the Buyer without prior writ ten approval by the Seller all warranties are void Equipment and accessories not manufactured by the Seller are warranted only to the extent of and by the original manufacturer s warranty THE FOREGOING WARRANTIES ARE IN LIEU OF ALL OTHER WARRAN TIES WHETHER ORAL WRITTEN EXPRESSED IMPLIED OR STATUTORY IMPLIED WARRANTIES OF FITNESS AND MERCHANTAB...

Page 41: ...40 INW TempHion Instruction Manual Notes ...

Page 42: ... WA 98032 USA 253 872 0284 FAX 253 872 0285 info inwusa com INW A Division of Seametrics 1997 2016 Seametrics All rights reserved Instrumentation Northwest and INW are trademarks of Seametrics Doc 9B0810r12 2 1 6 2016 PN 6D279 NI ...

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