Myron L 6PFCE User Manual

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ULTRAMETER

Operation

Manual

MODELS 6PFCE & 4P

™

20 Sep. 2013

BUFFER

°C

RATIO

% /

ORP RES TDSpHCOND

22nov11

Reference Junction under Glass pH Bulb

These Measurement keys will:

• Turn instrument on

• Measure parameter

• Exit any function

(Built-in

Electrodes)

Preprogrammed variable conductivity/ TDS ratios

Parameters

Wrist/neck strap slot

(user supplied)

pH/ORP Sensor Protective Cap

This key for:

• Calibration

• Memory Clear

• Solution Selection

• Confirmation

Up key/Memory Store

Down key/Memory Recall

Conductivity Cell

USER mode

for programming special temperature compensation factor and conductivity/TDS ratio

Displayed here:

• Temperature

readout

• USER temperature

compensation or conductivity/TDS ratio

• Memory Storage/

Recall

• pH Calibration

ORP

Electrode

pH Glass

Electrode

pH/ORP Sensor

(Replaceable)

For detailed explanations see Table of Contents

Temperature Sensor

MODEL 6PFCE

Shown with bluDock™ option installed

Time & Date displayed here

TEST Value

bluDock Enabled

I. INTRODUCTION

Thank you for selecting the feature-packed Ultrameter II™, one of the Myron L Company’s latest in an increasing line of instruments utilizing advanced microprocessor-based circuitry and SMT manufacturing processes. This circuitry makes the instrument extremely accurate, reliable and very easy to use.

Model 6PIIFCE includes Myron L Company’s exclusive Free Chlorine Equivalent (FCE) feature for making ORP-based free chlorine measurements. Both Ultrameter IIs now also feature optional wireless data transfer. Other features include a clock with time and date, memory of up to 100 locations with time and date stamp, the ability of the user to adjust the timeout “Auto oFF”, and enhanced performance.

See Features and Specications on pages 2 & 3.

The most exciting new feature is data logging with the ability to download the memory or stored test data wirelessly with its corresponding time, date and unit name. This feature allows the user to create spreadsheets and graphs with ease and quickly and accurately manipulate data more effectively. The optional bluDock™ and accompanying U2CI software is compatible with most computers using either Microsoft Windows XP, Vista, or 7™ or Macintosh OSX™. The data may be imported into a variety of spreadsheet formats like Microsoft Excel CSV™. Please Note: Although the Myron L Company has performed extensive testing, we cannot guarantee compatibility of all applications and formats. We suggest testing your application and format for compatibility before relying on it.

Bluetooth®

For your convenience, a brief set of instructions is provided on the bottom side of your Ultrameter II. A waterproof pocket-sized card with abbreviated instructions is also included with the instrument.

Special note ... Conductivity, resistivity, and TDS require mathematical correction to 25°C values (ref. Temperature Compensation, pg. 39). On the left of the Ultrameter II’s liquid crystal display is shown an indicator of the salt solution characteristic used to model temperature compensation of conductivity and its TDS conversion. The indicator may be KCl, NaCl, 442™ or User. Selection affects the temperature correction of conductivity, and the calculation of TDS from compensated conductivity (ref. Conductivity Conversion to Total Dissolved Solids (TDS), pg. 41). The selection can affect the reported conductivity of hot or cold solutions, and will change the reported TDS of a solution. Generally, using KCl for conductivity, NaCl

for resistivity, and 442 (Natural Water characteristic) for TDS will reect

present industry practice for standardization. This is how your instrument, as shipped from the factory, is set to operate. For use in sea water desalination for example, both the conductivity and TDS may easily be changed to NaCl.

II. FEATURES and SPECIFICATIONS

A. Features

• ORP-based FCE free chlorine measurement, displayed as ppm

concentration (6PFCE)

• Superior resolution 4 digit LCD displays full 9999 µS/ppm

• Cond/TDS accuracy of ±1% of READING in a handheld instrument

±0.1% at calibration point

• All electrodes are internal for maximum protection

• Improved 4 electrode sensor technology

• Waterproof to 1 meter/3 feet

• Autoranging conductivity/TDS/resistivity

• Prompts for easy pH calibration (6PFCE)

• Factory calibrations stored in microprocessor

• 3 conductivity/TDS solution conversions preprogrammed into

microprocessor

• User mode feature allows: Programming your own cond/TDS conversion factor

Programming your own temperature compensation factor Disabling temperature compensation

• Real Time Clock with Time and Date

• Data Logging with TIME and DATE in memory

• Memory stores 100 readings

• User adjustable timeout “Auto oFF”

•

Bluetooth®

wireless download capability with optional bluDock™

B. General Specications Display 4 Digit LCD

Dimensions (LxWxH) 196 x 68 x 64 mm/

7.7 x 2.7 x 2.5 in.

Weight 352 g/12.4 oz.

Case Material VALOX*

Cond/Res/TDS Cell Material VALOX* Cond/TDS Electrodes (4) 316 Stainless Steel Cond/Res/TDS Cell Capacity 5 ml/0.2 oz.

pH/ORP Sensor Well Capacity 1,2 ml/0.04 oz. (6PFCE)

Power 9V Alkaline Battery

Battery Life >100 Hours/5000 Readings Operating/Storage Temperature 0-55°C/32-132°F Protection Ratings IP67/NEMA 6 (waterproof to 1 meter/3 feet)

EMI/EMC Ratings EN61326-1: 2006 + Annex A: 2008

(hand-held devices)

(Conformité Européenne)

CISPR 11: 2003 IEC 61000-4-2: 2001 and, IEC 61000-4-3: 2002

* ™ SABIC Innovative Plastics IP BV

Additional information is available on our website:

www.myronl.com

MADE IN USA

C. Specication Chart

If either ORP or pH is outside the specied limits, the instrument will display “-Or-”.

D. Warranty/Service The Myron L Ultrameter II, excluding the pH/ORP sensor (6PFCE), has a Two (2) Year Limited Warranty. The pH/ORP sensor (6PFCE) has a

Six (6) Month Limited Warranty for materials and workmanship. If an instrument fails to operate properly, see Troubleshooting Chart, pg. 36.

The battery and pH/ORP sensor are user-replaceable. For other service,

return the instrument prepaid to the Myron L Company.

MYRON L COMPANY

2450 Impala Drive

Carlsbad, CA 92010-7226 USA

+1-760-438-2021 E-Mail: info@myronl.com techquestions@myronl.com

www.myronl.com

If, in the opinion of the factory, failure was due to materials or workmanship, repair or replacement will be made without charge. A reasonable service charge will be made for diagnosis or repairs due to normal wear, abuse or tampering. This warranty is limited to the repair or replacement of the Ultrameter II only. The Myron L Company assumes no other responsibility or liability.

E. Ultrameter II Models

TABLE OF CONTENTS

Instrument Illustration .......................................i

I. INTRODUCTION ................................... 1

II. FEATURES and SPECIFICATIONS .................... 2

A. Features ................................2

B. General Specications .....................2

C. Specication Chart ........................3

D. Warranty/Service..........................3

E. Ultrameter II Models ....................... 3

III. RULES of OPERATION..............................7

A. Operation ...............................7

B. Characteristics of the Keys ..................7

C. Operation of the Keys ......................7

1. Measurement Keys in General.........7

2. COND, RES and TDS Keys ........... 7

3. pH and ORP/Fr Chl Keys (6PFCE) ...... 8

4. CAL/MCLR Key ....................8

5. UP or DOWN Keys..................9

IV. AFTER USING THE ULTRAMETER II .................. 9

A. Maintenance of the Conductivity Cell ..........9

B. Maintenance of the pH/ORP Sensor (6PFCE)....9

V. SPECIFIC RECOMMENDED MEASURING

PROCEDURES .............................9

A. Measuring Conductivity &

Total Dissolved Solids (TDS)............. 9

B. Measuring Resistivity .....................10

C. Measuring pH (6PFCE) ....................10

D. Measuring ORP (6PFCE)................... 10

1. ORP/FCE Mode Selection............. 11

2. Measuring ORP .................... 11

E. Measuring Free Chlorine Using FCE..........12

1. Prepare for FCE Measurement ......... 12

2. FC

Flow Method ................... 12

3. FCE Immersion Method............... 13

4. FCE Best Practices .................. 14

VI. SOLUTION SELECTION............................14

A. Why Solution Selection is Available ..........14

B. The 4 Solution Types .....................14

C. Calibration of Each Solution Type ............14

D. Procedure to Select a Solution ..............14

E. Application of User Solution Type ............15

1. User Programmable Temperature

Compensation (Tempco) ........15

2. Disabling Temperature Compensation ... 15

TABLE OF CONTENTS

3. User Programmable Conductivity to

TDS Ratio ....................16

VII. CALIBRATION .................................... 17

A. Calibration Intervals ......................17

B. Rules for Calibration of the Ultrameter II ...... 17

1. Calibration Steps .................. 17

2. Calibration Limits ..................18

C. Calibration Procedures ....................18

1. Conductivity or TDS Calibration ....... 18

2. User Calibration Conductivity/TDS.....18

3. Resistivity Calibration ............... 19

4. Reloading Factory Calibration

(Cond or TDS) ................19

5. pH Calibration (6PFCE) .............19

6. ORP Calibration (6PFCE) ............21

7. Temperature Calibration ............. 21

VIII. CALIBRATION INTERVALS ......................... 22

A. Suggested Intervals ......................22

B. Calibration Tracking Records ............... 22

C. Conductivity, RES, TDS Practices............22

D. pH and ORP Practices (6PFCE) .............23

IX. MEMORY........................................23

A. Memory Storage ......................... 23

B. Memory Recall ..........................23

C. Clearing a Record/Memory Clear ............24

X. TIME and DATE................................... 24

A. Setting TIME ............................24

B. Setting DATE............................25

C. DATE FORMAT “US & International (Int)” ...... 26

XI. TEMPERATURE FORMAT “Centigrade & Fahrenheit” ..... 26

XII. TOTAL RETURN to FACTORY SETTINGS..............27

XIII. CELL CHECK .................................... 28

XIV. AUTO OFF ......................................28

XV. USER Mode CALIBRATION LINC™ FUNCTION .........29

A. Calibration of Ultrameter II for use in

User mode .......................... 29

B. Setting User mode Calibration “Linc” .........30

C. Canceling User mode Calibration “Linc” .......31

XVI. bluDock™ Wireless Data Transfer Instructions........... 32

A. Software Installation ...................... 32

B. Hardware Setup .........................32

C. Memory Stack Download ..................33

XVII. CARE and MAINTENANCE .........................34

TABLE OF CONTENTS

A. Temperature Extremes .................... 34

B. Battery Replacement...................... 34

C. pH/ORP Sensor Replacement (6PFCE) ....... 34

D. Cleaning Sensors ........................ 34

XVIII. TROUBLESHOOTING CHART ....................... 36

XIX. ACCESSORIES...................................38

A. Conductivity/TDS Standard Solutions .........38

B. pH Buffer Solutions (6PFCE) ................ 38

C. pH Sensor Storage Solution (6PFCE) .........38

D. ORP Sensor Conditioner Solution (6PFCE)..... 38

E. Soft Protective Carry Cases ................ 39

F. Hard Protective Carry Cases ...............39

G. Replacement pH/ORP Sensor (6PFCE) ....... 39

H. bluDock™ Wireless Data Transfer

Accessory Package ................... 39

XX. TEMPERATURE COMPENSATION (Tempco)

of Aqueous Solutions ........................ 39

A. Standardized to 25°C ..................... 39

B. Tempco Variation.........................39

C. An Example of 2 different solution selections and

the resulting compensation ............. 40

D. A Chart of Comparative Error ............... 40

E. Other Solutions ..........................41

XXI. CONDUCTIVITY CONVERSION to

TOTAL DISSOLVED SOLIDS (TDS) ............41

A. How it’s Done ...........................42

B. Solution Characteristics ...................42

C. When does it make a lot of difference?........ 42

XXII. TEMPERATURE COMPENSATION (Tempco)

and TDS DERIVATION....................... 43

A. Conductivity Characteristics ................ 43

B. Finding the Tempco of an Unknown Solution ... 43

C. Finding the TDS Ratio of an Unknown Solution ....43

XXIII. pH and ORP (6PFCE) ...............................44

A. pH (6PFCE) .............................44

B. ORP/Oxidation-Reduction Potential/

REDOX (6PFCE) .....................46

C. Free Chlorine Equivalent ..................47

1. FCE as an Indicator of Sanitizing

Strength .....................47

2. FCE Units ........................ 47

XXIV. SOFTWARE VERSION ............................. 48

XXV. GLOSSARY......................................49

III. RULES of OPERATION

A. Operation Using the instrument is simple:

• Individual or multiple parameter readings may be obtained by lling individual sensors or entire cell cup area.

• Rinse the conductivity cell or pH/ORP sensor (6PFCE) well with test solution 3 times and rell. Temperature and/or

measurement extremes will require additional rinses for maximum accuracy.

• Press the desired measurement key to start measurement.

Pressing the key again restarts the 15 second “Auto oFF” timer.

• Note the value displayed or press the MS key to store the

reading (ref. Memory Storage, pg. 23). It’s that simple!

B. Characteristics of the Keys

• Though your Ultrameter II has a variety of sophisticated options, it is designed to provide quick, easy, accurate measurements by simply pressing one key.

• All functions are performed one key at a time.

• There is no “off” key. After 15 seconds of inactivity the

instrument turns itself off (60 seconds in CAL mode). User

adjustable up to 75 seconds (ref. Auto oFF, pg. 28).

• Rarely is it necessary to press and

to Select a Solution, pg. 14; or Conductivity or TDS Calibration,

pg. 18).

C. Operation of the Keys (See Instrument Illustration, pg. i)

1. Measurement Keys in General Any of the 5 measurement keys in the upper part of the keypad turns on the instrument in the mode selected. The mode is shown at the bottom of the display, and the measurement units appear at the right. Pressing a measurement key does this even if you are in a calibration sequence and also serves to cancel a change (ref. Leaving Calibration, pg. 17).

hold

a key (as in Procedure

2. COND, RES and TDS Keys These 3 keys are used with solution in the Conductivity Cell. Precautions:

• While lling cell cup ensure no air bubbles cling on the cell wall.

• If the proper solution is not selected (KCl, NaCl, 442 or User),

refer to Why Solution Selection is Available, pg. 14 and Procedure to Select a Solution, pg. 14. a. COND Key Solution to be tested is introduced into the conductivity cell and a press

of displays conductivity with units on the right. On the left is

shown the solution type selected for conductivity.

b. RES Key

ORP

Fr Chl

ORP

Fr Chl

A press of displays resistivity with units on the right. On the left

is shown solution type selected for resistivity (ref. Solution Selection, pg.

14). The range of display of resistivity is limited to between 10 kilohms

(KΩ) and 30 megohms (MΩ). A solution outside that range will only show

[- - - -] in the display. c. TDS Key A press of displays Total Dissolved Solids with units on the right.

This is a display of the concentration of material calculated from compensated conductivity using the characteristics of a known material. On the left is shown solution type selected for TDS (ref. Solution Selection, pg. 14).

3. pH and ORP/Fr Chl Keys (6PFCE) Measurements are made on solution held in the pH/ORP sensor well (ref. pH and ORP, pg. 44). The protective cap is removed and the sensor well is lled and rinsed with the sample enough times to completely

replace the storage solution.

After use, the pH/ORP sensor well must be relled with Myron L Storage

Solution, and the protective cap reinstalled securely (ref. Maintenance

of the pH/ORP Sensor, pg. 9 and Cleaning Sensors, 2. pH/ORP, pg. 34). a. pH Key (6PFCE)

A press of

b. ORP/Fr Chl Key (6PFCE)

displays pH readings. No units are displayed on the right.

In ORP mode, a press of

displays Oxidation-Reduction

Potential/REDOX reading in millivolts; “mV” is displayed.

When the FCE mode is activated, a press of

displays the Free

Chlorine Equivalent reading in “ppm” alternating with the FCE predictive ORP reading in “mV”.

4. CAL/MCLR Key

A press of allows you to enter the calibration mode while

measuring conductivity, TDS or pH. Once in CAL mode, a press of this

key accepts the new value. If no more calibration options follow, the instrument returns to measuring (ref. Leaving Calibration, pg. 17).

is held down for about 3 seconds when the ORP or FCE

functions are active, CAL mode is not entered. Instead either “OrP” or “Chl” will appear depending on which mode is active. Change modes by pressing the Up or Down buttons. Press any parameter key to exit ORP unit preference selection or let the unit time out. ORP unit preference will be saved.

If is held down for about 3 seconds at any other time, CAL mode

but “SEL” appears to allow Solution Selection (ref. pg. 14) with the Up or is not entered, Down keys. As in calibration, the CAL key is now an “accept” key. While reviewing stored records, the MCLR side of the key is active to

allow clearing records (ref. Clearing a Record/Memory Clear, pg. 24).

5. UP or DOWN Keys

While measuring in any parameter, the or

the Memory Store and Memory Recall functions. While in CAL mode, the keys step or scroll the displayed value up or down. A single press steps the display and holding either key scrolls the value rapidly.

While in Memory Recall, the keys scroll the display up and down through the stack of records (ref. Memory Recall, pg. 23).

IV. AFTER USING THE ULTRAMETER II A. Maintenance of the Conductivity Cell Rinse out the cell cup with clean water. Do not scrub the cell. For oily

lms, squirt in a foaming non-abrasive cleaner and rinse (ref. Cleaning

Sensors, pg. 34). Even if a very active chemical discolors the electrodes, this does not affect the accuracy; leave it alone.

keys activate

B. Maintenance of the pH/ORP Sensor (6PFCE) The sensor well must be kept wet with a saline solution. Before replacing

the rubber cap, rinse and ll the sensor well with Myron L pH Sensor

Storage Solution. If unavailable, use an almost saturated KCl solution,

pH 4 buffer or a saturated solution of table salt and tap water (ref. pH and ORP Practices to Maintain Calibration, pg. 23). NEVER USE

DISTILLED WATER.

V. SPECIFIC RECOMMENDED MEASURING PROCEDURES If the proper solution is not selected (KCl, NaCl, 442 or User), see Solution Selection, pg. 14.

NOTE: After sampling high concentration solutions or temperature extremes, more rinsing may be required. When sampling low conductivity

solutions, be sure the pH cap is well seated so that no solution washes into the conductivity cell from around the pH cap.

A. Measuring Conductivity & Total Dissolved Solids (TDS)

1. Rinse cell cup 3 times with sample to be measured. (This conditions the temperature compensation network and prepares the cell.)

2. Rell cell cup with sample.

3. Press or .

4. Take reading. A display of [- - - -] indicates an overrange condition.

B. Measuring Resistivity Resistivity is for low conductivity solutions. In a cell cup the value may drift from trace contaminants or absorption from atmospheric gasses, so

measuring a owing sample is recommended.

1. Ensure pH protective cap is secure to avoid contamination.

2. Hold instrument at 30° angle (cup sloping downward).

3. Let sample ow continuously into conductivity cell with no aeration.

4. Press

key; use best reading.

NOTE: If reading is lower than 10 kilohms display will be dashes: [ - - - - ]. Use Conductivity.

C. Measuring pH (6PFCE)

1. Remove protective cap by rotating while grasping and pulling up.

2. Rinse pH/ORP sensor well and conductivity cell cup 3 times with sample to be measured. Shake out each sample to remove any residual liquid.

3. Rell both sensor well and cell cup with sample.

4. Press

5. Note value displayed.

6. IMPORTANT: After use, ll pH/ORP sensor well with Myron L

pH Sensor Storage Solution and replace protective cap. If Myron L pH Sensor Storage Solution is unavailable, use a strong KCl solution, a pH 4 buffer, or a saturated solution of table salt and tap water (ref. Cleaning Sensors, 2. pH/ORP, pg.

34).

The Ultrameter II features the ability to measure the activity of oxidizing or reducing chemicals in solution as ORP mV. The instrument also includes an innovative Free Chlorine Equivalent (FCE) feature (Measuring Free Chlorine Using FCE, pg. 12) that uses ORP and pH to measure free available chlorine (FAC) concentration in ppm. ORP mV and ppm of free available chlorine (FAC) are the two most commonly used sanitizer units of measure in water quality management.

Do not allow pH/ORP sensor to dry out.

D. Measuring ORP

1. ORP / FCE Mode Selection

PPM

The Ultrameter II allows the user to choose between measuring oxidizing sanitizers using either ORP mV or as parts per million (ppm) of equivalent free chlorine. Use ORP to directly measure the oxidizing power of all sanitizers like ozone, bromine, peracetic acid or chlorine. Use FCE to measure the strength of oxidizing sanitizers as ppm of equivalent free chlorine. To select between ORP and Free Chlorine modes:

1. Press

2. Press and hold

for approximately 3 seconds.

The current preference for ORP units of measure is displayed. Factory setting for this preference is ORP mV.

3. Press the or

keys to toggle between mV (standard

ORP mode) and FCE ppm. The setting chosen is displayed.

4. Press any parameter key to exit ORP unit preference selection

or let the unit time out. ORP unit preference will be saved.

2. Measuring ORP

1. Ensure the 6PFCE is in ORP mode (ref. ORP Mode Selection,

pg. 10).

2. Remove protective cap by rotating while grasping and pulling up.

3. Rinse sensor well and cell cup 3 times with sample to be

measured. Shake out each sample to remove any residual liquid.

4. Rell both sensor well and cell cup with sample.

5. Press .

6. Take reading.

7. Press MS to store reading in memory, if desired.

IMPORTANT: After use, ll pH/ORP sensor well with Myron L

pH Sensor Storage Solution and replace protective cap. If Myron L pH Sensor Storage Solution is unavailable, you can use a strong KCl solution, a pH 4 buffer, or a saturated solution of table salt and tap water (ref. Cleaning Sensors, 2. pH/ORP, pg. 34). Do not allow pH/ORP sensor to dry out.

E. Measuring Free Chlorine Using FC

The FCE function can be used to measure discrete samples, owing solution and bodies of water. Measurement technique is particular to the type of sample. For accurate results, use the FCE Flow Method described

in section 2 below to measure discrete or owing samples. Use the FCE

Immersion Method described in section 3 below in situations where the 6PFCE can be dipped to obtain a sample. Read through section 4. FCE Best Practices before you begin.

1. Prepare for FCE Measurement

1. For ease of measurement, set the instrument’s Auto oFF feature

to 75 sec (ref. Auto oFF, pg. 28).

2. Ensure the FCE mode has been activated (ref. ORP/FCE Mode Selection, pg. 10).

3. Remove protective cap from the pH/ORP sensor by rotating

while grasping and pulling up.

2. FCE Flow Method

1. Empty the pH/ORP sensor well of all storage solution.

2. Hold the 6PFCE at a 30º angle (cup sloping downward).

3. Thoroughly ush the sensor well and cell cup with a steady

stream of the solution you intend to measure by allowing the

solution to ow into and out of the sensor well and cell cup for at

least 10 seconds.

4. Let sample ow continuously into conductivity cell with no

aeration.

5. Allow both the sensor well and cell cup to remain lled with

sample.

6. Press

predicted nal ORP value and a free chlorine equivalent

concentration in ppm. Both readings will change rapidly at rst.

7. Wait for the readings to stabilize. When the mV and ppm values are unchanging for 5 consecutive readings, the FCE reading has reached a stable level. This may take 1 to 2 minutes. NOTE: If the reading takes more than 1 minute to stabilize,

. The instrument will begin alternating between a

press the

from disturbing the measurement process. Annunciators will

alert you when either the pH or ORP of the nal FCE ppm value

are Out of Range (“-Or-”).

8. Press MS to store reading in memory if desired.

3. FCE Immersion Method

NOTE: Use this method for pools, spas and other large standing bodies of water.

1. Hold instrument beneath the surface of the water to avoid

surface effects on the water’s chemistry.

2. Swirl the instrument around for at least 10 seconds to thoroughly rinse the cell cup and sensor well.

3. Continue holding the instrument under the surface while taking the reading.

4. Press .

5. The instrument will begin alternating between a predicted nal

ORP value and a free chlorine equivalent concentration in ppm.

Both readings will change rapidly at rst.

after 1 minute to prevent Auto oFF feature

6. Wait for the readings to stabilize. When the mV and ppm values are unchanging for 5 consecutive readings, the FCE reading has reached a stable level. This may take 1 to 2 minutes. NOTE: If the reading takes longer than 1 minute to stabilize,

press after 1 minute to prevent Auto oFF feature from

disturbing the measurement process. Annunciators will alert

you when either the pH or ORP of the nal FCE ppm value are

Out of Range (“-Or-”).

7. Press MS to store reading in memory if desired.

4. FCE Best Practices

For best results it is recommended that you:

1. Take 3 consecutive FCE measurements and record the readings.

2. Calculate the average of the 3 measurements. Use this value.

3. Ignore measurements that are signicantly different from the

others. Ex: 3.20 ppm, 1.15 ppm, 3.10 ppm

IMPORTANT: After use, ll pH/ORP sensor well with Myron L pH Sensor Storage Solution and replace protective cap. If Myron L pH Sensor Storage Solution is unavailable, you can use a strong KCl solution, a pH 4 buffer, or a saturated solution of table salt and tap water (ref. Cleaning Sensors, 2. pH/ORP, pg. 34). Do not allow pH/ORP sensor to dry out.

VI. SOLUTION SELECTION

A. Why Solution Selection is Available Conductivity, resistivity, and TDS require temperature correction to 25°C values (ref. Standardized to 25°C, pg. 39). Selection determines the temperature correction of conductivity and calculation of TDS from compensated conductivity (ref. Cond. Conversion to TDS, pg. 41).

B. The 4 Solution Types On the left side of the display is the salt solution characteristic used to model temperature compensation of conductivity and its TDS conversion. Generally, using KCl for conductivity, NaCl for resistivity, and 442 (Natural

Water characteristic) for TDS will reect present industry practice for

standardization. This is how your instrument is shipped from the factory (ref. Solution Characteristics, pg. 42).

The User selection allows a custom value to be entered for the temperature compensation of conductivity and also the conversion ratio if measuring TDS.

C. Calibration of Each Solution Type There is a separate calibration for each of the 4 solution types. Note that calibration of a 442 solution does not affect the calibration of a NaCl solution. For example: Calibration (ref. Conductivity or TDS Calibration,

pg. 18) is performed separately for each type of solution one wishes to measure (ref. Conductivity/TDS Standard Solutions, pg. 38).

D. Procedure to Select a Solution

NOTE: Check display to see if solution displayed (KCl, NaCl, 442 or

User) is already the type desired. If not:

Figure 1

KCl

442

NaCl

User

Figure 2

°C% /

User

COND

1. Press , or to select the parameter on which

you wish to change the solution type.

2. Press and hold key

for 3 seconds to make “SEL” appear (see Figure 1). For demonstration purposes, all 4 solution types are shown simultaneously.

3. Use the or key to select type of solution desired

(ref. Solution Characteristics, pg. 42). The selected solution type will be displayed: KCl, NaCl, 442 or User.

4. Press to accept new solution type.

E. Application of User Solution Type

1. User Programmable Temperature Compensation (Tempco) This feature allows you to change your Ultrameter II’s temperature

compensating factor to another factor between 0-9.99%/°C (ref. Temperature Compensation, pg. 39). This feature does not apply to pH

or ORP.

a. As in D. Procedure to Select a Solution above, select “User” mode.

b. With User mode now selected, press . You may now

adjust a temperature compensation from .00%/°C to 9.99%/°C,

by pressing or .

See example in Figure 2.

c. Press twice to skip

calibration adjustment and accept the new tempco (3 times if in TDS mode). You are now ready to measure samples with your new temperature compensation factor.

2. Disabling Temperature Compensation a. Select User mode (ref. Procedure to Select a Solution, pg. 14).

b. With “User” selected, press . If the display does not

Figure 3

°C% /

User

COND

Figure 4

RATIO

User

TDS

In these first six sections, you have learned all you need to make accurate measurements. The following sections contain calibration, advanced operations and technical information.

show .00%/°C, hold long enough to bring the tempco to .00%/°C (see Figure 3).

c. Press twice

(3 times if in TDS mode). Temperature compensation is now disabled (=0) for measurements in User mode.

3. User Programmable Conductivity to TDS Ratio

This feature allows you to select a custom conductivity to TDS conversion ratio within the range of 0.20-7.99 for User mode measurements.

To determine the conversion ratio for a custom solution of known TDS ppm value, measure the solution conductivity at 25ºC with the Ultrameter II and divide the ppm value by the µS value. For example,

a solution of known 75 ppm TDS and measured 100 µS conductivity at 25ºC would have a conversion ratio of 75/100 or 0.75. Enter the new

conversion ratio as follows:

a. While in User mode, press .

b. Press twice (to skip

over tempco adjustment) and

“RATIO” will appear (see Figure 4).

c. Adjust with or

key until new conversion ratio is displayed.

d. Press twice (to skip over calibration adjustment) to

accept new conversion ratio. You are now ready to measure

samples with the new conductivity/TDS ratio.

VII. CALIBRATION

KCl, NaCl or 442 User

Cond Gain only Tempco, then Gain

Res Done in conductivity Done in conductivity or TDS

TDS Gain only Tempco, Ratio, then Gain

pH 7, acid and/or base (6PFC

)

ORP Zero set with pH 7 automatically (6PFC

)

A. Calibration Intervals Generally, calibration is recommended about once per month with

Conductivity or TDS solutions. Calibration with pH solutions should

be checked twice a month. Calibration of ORP is not necessary (ref. CALIBRATION INTERVALS, pg. 22).

B. Rules for Calibration of the Ultrameter II

1. Calibration Steps a. Starting Calibration

Calibration is begun by pressing while measuring Conductivity, TDS or pH. Measuring continues, but the “CAL” icon is on, indicating calibration is now changeable.

The reading is changed with the and keys to match the known value. The calibration for each of the 4 solution types may be performed in either conductivity or TDS mode.

Depending on what is being calibrated, there may be 1, 2 or 3 steps to the calibration procedures.

Once in CAL mode, the key becomes an “ACCEPT” key. At

each point, pressing accepts the new calibration value and steps

you to the next adjustment (or out of CAL mode if there are no more steps).

To bypass a calibration step, simply press to accept the present value as is.

b. Leaving Calibration Calibration is complete when the “CAL” icon goes out. Pressing any measurement key cancels changes not yet accepted and exits calibration mode.

Leaving pH after the 2nd buffer results in the same gain being entered

in place of the 3rd buffer.

2. Calibration Limits

Figure 5

°C

KCl

COND

CAL

There are calibration limits. A nominal “FAC” value is an ideal value stored by the factory. Attempts to calibrate too far, up or down, from there will cause the displayed value to be replaced with “FAC”. If you accept it (press the “Cal” key), you will have the original default factory calibration for this measurement. The need to calibrate so far out that “FAC” appears indicates a procedural problem, incorrect

standard solution, a very dirty cell cup or an aging pH/ORP sensor (ref.

Troubleshooting Chart, pg. 36).

C. Calibration Procedures

1. Conductivity or TDS Calibration

a. Rinse conductivity cell three times with proper standard (KCl,

NaCl, or 442) (ref. Cond/TDS Standard Solutions, pg. 38). For user calibration see User Calibration Conductivity/TDS below.

b. Rell conductivity cell with same standard. KCl-7000 shown.

c. Press or

, then

press ; “CAL” icon will

appear on the display (see Figure 5).

d. Press or to

step the displayed value toward the standard’s value (7032 >

7000) or hold a key down to scroll rapidly through the reading.

e. Press once to conrm new value and end the

calibration sequence for this particular solution type. If another solution type is also to be measured, change solution type now and repeat this procedure.

2. User Calibration Conductivity/TDS

Instrument must be in User mode, see Solution Selection, pg. 14. a. Rinse conductivity cell three times with your standard.

b. Rell conductivity cell with same standard.

c. Press or , then press twice in COND/

three times in TDS. The “CAL” icon will appear on the display.

d. Press or to step the displayed value toward the

standard’s value or hold a key down to scroll rapidly through the reading.

e. Press once to conrm new value and end the

Figure 6

BUFFER

CAL

calibration sequence for this particular solution type.

3. Resistivity Calibration Resistivity is the reciprocal of conductivity. To calibrate resistivity, calibrate conductivity for the solution type you wish to measure (ref.

Conductivity or TDS Calibration, pg. 18).

4. Reloading Factory Calibration (Cond or TDS) If calibration is suspect or known to be incorrect, and no standard solution is available, the calibration value can be replaced with the original factory value for that solution. This “FAC” value is the same for all Ultrameter IIs, and returns you to a known state without solution in the cell. The “FAC” internal electronics calibration (which bypasses the electrodes and cell)

is not intended to replace calibration with conductivity/TDS standard

solutions. If another solution type requires resetting, change solution type and repeat this procedure.

a. Press or

b. Press . (If in User solution mode. Press CAL key

twice if in Conductivity, and three times if in TDS to skip over tempco and ratio adjustments.)

c. Press key until “FAC” appears and release.

d. Press to accept the factory calibration setting.

5. pH Calibration (6PFCE)

IMPORTANT: Always “zero” your Ultrameter II with a pH 7 buffer solution before adjusting the gain with acid or base buffers, i.e., 4 and/or 10, etc.

a. pH Zero Calibration (6PFCE)

1. Rinse sensor well and cell cup 3 times with 7 buffer solution.

2. Rell both sensor well and cell cup with 7 buffer solution.

3. Press to verify the

pH calibration. If the display shows 7.00, skip the pH Zero Calibration and proceed to section b. pH

Gain Calibration.

4. Press

and “7” annunciators will appear (see Figure 6, page 19). Displayed value will be the uncalibrated sensor.

to enter calibration mode. The “CAL”, “BUFFER”

NOTES: If a wrong buffer is added (outside of 6-8 pH),“7” and “BUFFER” will ash, and the Ultrameter II will not adjust.

The uncalibrated pH value displayed in step 4 will assist in determining the accuracy of the pH sensor. If the pH reading is above 8 with pH 7 buffer solution, the sensor well needs additional rinsing or the pH sensor

is defective and needs to be replaced

5. Press or until the display reads 7.00.

NOTE: Attempted calibration of >1 pH point from factory calibration will

cause “FAC” to appear. This indicates the need for sensor replacement (ref. Troubleshooting Chart pg. 36) or fresh buffer solution. The “FAC” internal electronic calibration is not intended to replace calibration with pH buffers. It assumes an ideal pH sensor. Each “FAC” indicates a factory setting for that calibration step (i.e., 7, acid, base).

You may press to accept the preset factory value, or you may

reduce your variation from factory setting by pressing or

6. Press to accept the new value. The pH Zero Calibration

is now complete. You may continue with pH Gain Calibration or

exit by pressing any measurement key.

b. pH Gain Calibration (6PFCE)

IMPORTANT: Always calibrate or verify your Ultrameter II with a pH 7 buffer solution before adjusting the gain with acid or base buffers, i.e.,

4 and/or 10, etc. Either acid or base solution can be used for the 2nd

point “Gain” calibration and then the opposite for the 3rd point. The display will verify that a buffer is in the sensor well by displaying either “Acd” or “bAS”.

1. The pH calibration mode is initiated by either completion of the

pH Zero Calibration, or verifying 7 buffer and pressing the

key twice while in pH measurement mode.

2. At this point the “CAL”, “BUFFER” and “Acd” or “bAS”

annunciators will be displayed (see Figures 7 and 8).

Figure 7

BUFFER

CAL

Figure 8

BUFFER

CAL

NOTE: If the “Acd” and “bAS” indicators are blinking, the unit is indicating an error and needs either an acid or base solution present in the sensor well

3. Rinse sensor well 3 times with acid or base buffer solution.

4. Rell sensor well again with same buffer solution.

5. Press or

until display agrees with buffer value.

6. Press to accept 2nd point of calibration. Now the

display indicates the next type of buffer to be used.

Single point Gain Calibration is complete. You may continue for the 3rd point of Calibration (2nd Gain) or exit by pressing any measurement key. Exiting causes the value accepted for the buffer to be used for both acid and base measurements.

To continue with 3rd point calibration, use basic buffer if acidic buffer was used in the 2nd point, or vice-versa. Again, match the display to the known buffer value as in step 2 and continue with the following steps:

7. Repeat steps 3 through 6 using opposite buffer solution.

8. Press to accept 3rd point of calibration, which

completes the Calibration procedure. Fill sensor well with Myron L Storage Solution and replace protective cap.

6. ORP/FCE Calibration (6PFCE) ORP electrodes rarely give false readings without problems in the reference electrode. For this reason, and because calibration solutions for ORP are highly reactive and potentially hazardous, your Ultrameter II has an electronic ORP calibration. This causes the zero point on the

reference electrode to be set whenever pH 7 calibration is done.

7. Temperature Calibration Temperature calibration is not necessary in the Ultrameter II.

VIII. CALIBRATION INTERVALS

There is no simple answer as to how often one should calibrate an instrument. The Ultrameter II is designed to not require frequent recalibration. The most common sources of error were eliminated in the design, and there are no mechanical adjustments. Still, to ensure

specied accuracy, any instrument must be checked against chemical

standards occasionally.

A. Suggested Intervals On the average, we expect calibration need only be checked monthly for the Conductivity, RES or TDS functions. The pH (6PFCE) function should be checked every 2 weeks to ensure accuracy. Measuring some solutions will require more frequent intervals.

B. Calibration Tracking Records To minimize your calibration effort, keep records. If adjustments you are making are minimal for your application, you can check less often. Changes in conductivity calibration should be recorded in percent. Changes in pH calibration (6PFCE) are best recorded in pH units.

Calibration is purposely limited in the Ultrameter II to ±10% for the conductivity cell, as any change beyond that indicates damage, not drift. Likewise, calibration changes are limited to ±1 pH unit (6PFCE), as any change beyond that indicates the end of the sensor’s lifetime and replacement is recommended.

C. Conductivity, RES, TDS Practices to Maintain Calibration

1. Clean oily lms or organic material from the cell electrodes

with foaming cleaner or mild acid. Do not scrub inside the cell.

2. Calibrate with solutions close to the measurements you make.

Readings are compensated for temperature based on the type of solution. If you choose to measure tap water with a KCl compensation, which is often done (ref. An Example of 2 different solution selections and the resulting compensation, pg. 40), and you calibrate with 442 solution because it is handy, the further away from 25°C you are, the more error you

have. Your records of calibration changes will reect

temperature changes more than the instrument’s accuracy.

3. Rinse out the cell with pure water after taking measurements.

Allowing slow dissolving crystals to form in the cell contaminates future samples.

4. For maximum accuracy, keep the pH sensor cap on tight so

that no uid washes into the conductivity cell.

D. pH and ORP Practices to Maintain Calibration (6PFCE)

Figure 9

°C

KCl

COND

MEMORY

1. Keep the sensor wet with Myron L Storage Solution.

2. Rinse away caustic solutions immediately after use.

ORP calibration solutions are caustic, and ±5% is considered very

accurate. By using the pH zero setting (0 mV = 7 pH) for ORP and

precision electronics for detection, the Ultrameter II delivers better accuracy without calibration than a simpler instrument could using calibration solutions.

IX. MEMORY

This feature allows up to 100 readings with their temperatures to be stored simultaneously for later recall. At the same time, the TIME and DATE are also recorded. To download the memory to a computer, (ref. bluDock™ WIRELESS DATA TRANSFER INSTRUCTIONS, pg. 32).

A. Memory Storage

1. While displaying a measurement, press to record the displayed value.

2. “MEMORY” will appear and the temperature display will be momentarily replaced by a number (1-100) showing the position of the record. Figure 9 shows a reading

of 1806 µS stored in memory record #4.

B. Memory Recall

1. Press any measurement key.

2. Press

, “MEMORY” will appear, and the display will

show the last record stored.

3. Press or

to scroll to the record location desired

(the temperature display alternates between temperature recorded and location number).

4. Press to display time and date stamp.

5. Press any measurement key to leave memory recall or allow to automatically turn off.

C. Clearing a Record/Memory Clear

Figure 10

MEMORY

Figure 11

CAL

After recalling a certain record location, press and HOLD to

clear that memory. This space will be the place for the next memory record, unless you scroll to another empty position before ending the recall sequence. The next memory stored will go into the next highest available memory location.

Example:

You have locations 1-7 lled and wish to clear the conductivity

reading stored in record location #3 and replace it with a pH reading.

1. Press

and scroll to location #3.

2. Press and HOLD

to clear old record #3.

3. Fill pH/ORP sensor well with sample.

4. Press

to measure sample and press to store

reading in location #3.

5. The next memory stored will go into location #8.

6. To clear all records: After

pressing

, scroll down.

“CLr ALL” will be displayed (see Figure 10).

7. Press

. All records will

be cleared.

X. TIME and DATE

The Time and Date may easily be changed as you travel.

A. Setting TIME Time is always displayed in 24 hour time.

Example shown in Figure 11, 16:05 equals 4:05 PM.

1. Press

2. Press until the time is displayed (scrolling through

stored readings, PC OFF, and CLr ALL to time, e.g., “16:05”).

Figure 12

Figure 13

CAL

Figure 14

CAL

3. Press to initiate.

“CAL” will be displayed along with the time (see Figure 11).

4. Press or to change the time.

5. Press to accept the change (new time).

B. Setting DATE Example shown in Figure 12

is in US format, i.e., mo/dy/yr.

NOTE: The default format is US. Date format may be changed (ref. Date Format “US and International (Int)”, pg. 26).

1. Press

2. Press repeatedly until the date is displayed (scrolling

through stored readings, PC OFF, CLr ALL and time to the date, e.g., “11.18 11” (Figure 12), November 18, 2011).

3. Press to initiate. “CAL” will be displayed along with the

YEAR (see Figure 13).

4. Press or to

change the YEAR.

5. Press to accept the

change (new year).

6. Press or to

change the month.

7. Press to accept the

change (new month),

Figure 15

CAL

Figure 16

Figure 17

(see Figure 14).

8. Press

to change the day.

9. Press to accept

the change (new day) (see Figure 15).

C. DATE FORMAT “US & International (Int)”

1. Press .

2. Press repeatedly until the format is displayed (scrolling

through stored readings, PC OFF, CLr ALL, time and date to date format).

3. Press to change. Display will now indicate other format

(see Figures 16 & 17).

4. Press any measurement key or allow to automatically turn off.

XI. TEMPERATURE FORMAT “Centigrade & Fahrenheit”

1. Press .

2. Press to display the stored memory records.

3. Press repeatedly until you pass the “US” or “Int” date

format location. The display will show a “C” or “F”

Figure 18

Figure 19

Figure 20

(see Figures 18 and 19).

4. Press to switch units.

5. Press to accept unit preference for all temperature

readings.

NOTE: Tempco will still be shown in %/°C

XII. TOTAL RETURN to FACTORY SETTINGS “FAC SEL”

There may come a time when it would be desirable to quickly reset all the recorded calibration values in the instrument back to the factory settings. This might be to ensure all calibrations are set to a known value, or to give the instrument to someone else free of adjustments or recorded data for a particular application.

NOTE: All stored data will be lost.

1. Press

2. Press to display the stored memory records.

3. Press repeatedly

until you pass the CLr ALL and the C-F locations. The display will show a “FAC SEL” (see Figure 20).

4. Press to accept the resetting. Display will return to

Conductivity.

XIII. CELL CHECK

Figure 21

Figure 22

Figure 23

Figure 24

The cell check veries the cleanliness of the conductivity/TDS/resistivity

sensor. In normal use the cell may become dirty or coated and require cleaning. If the display is showing “.00” when the cell cup is dry, the

sensor is probably clean. However, when testing high purity water in

resistivity (“RES”) mode improved accuracy may be desired. No matter what a manufacturer claims, a sensor can and will become contaminated or coated and, therefore, require cleaning. A true 4-wire sensor, as in the Ultrameter II, helps to mitigate contamination, but NO SENSOR IS 100% IMMUNE.

1. Press .

2. Press to display the

stored memory records.

3. Press repeatedly until

you pass the FAC SEL location. The display will show a “CELL ch” (see Figure 21).

4. Press to test.

If cell is clean, “Good” will momentarily be displayed (see Figure 22). If cell is dirty, “CELL cLn” will be displayed (see Figure 23) (ref. Cleaning Sensors, pg. 34).

XIV. AUTO oFF

Auto oFF allows the user to adjust the time the instrument is ON (up to 75 seconds) after each press of a key. Default time is 15 seconds with 60 seconds in CAL (calibration) mode.

1. Press .

2. Press to display the stored memory records.

Figure 25

CAL

Figure 26

CAL

3. Press repeatedly until you pass the CELL ch location.

The display will show “Auto oFF” (Figure 24).

4. Press

to initiate. “CAL”

will be displayed along with “15 SEC” or current Auto oFF value (see Figure 25).

5. Press or to

change the amount of time (see Figure 26). Maximum time of 75 seconds is shown.

6. Press to accept the

change (new time).

XV. USER MODE CALIBRATION LINC™ FUNCTION

The Linc™ function allows easy calibration when in User mode and the user does not have a user standard solution to calibrate the instrument. This function will ensure more repeatable and accurate measurements than many other calibration methods. It is recommended that this

function be used to provide the highest degree of condence when the

Ultrameter II is used in User mode. When Linc is used, the User mode is linked to another standard, i.e., if User and KCl are linked, a KCI standard solution is used to calibrate the instrument. It is that simple.

A. Calibration of Ultrameter II for use in User mode

1. Press

or key.

2. Calibrate the unit using a Standard Solution (ref. CALIBRATION, pg. 17).

3. Place the Ultrameter II in User mode (ref. SOLUTION SELECTION, pg. 14).

4. Verify/Set the calibration linc. (See B. Setting User

Mode Calibration “Linc”, pg. 30.)

B. Setting User mode Calibration “Linc”

Figure 27

Figure 28

User

Figure 29

KCl

User

The Linc function sets or “links” the calibration gain factor of a Standard Solution to the User solution mode. Once set, the “Linc” will stay intact with future calibrations unless the Linc has been canceled. For more information on canceling the User mode Calibration Linc refer to C. “Canceling User mode Calibration “Linc”.

Follow the steps below to set either the KCl, NaCl or 442 calibration factor to the User solution mode.

1. Press measurement key desired to be “Linked”, i.e., ,

2. Place the Ultrameter II in

User mode (ref. SOLUTION SELECTION, pg. 14, for selecting the User mode).

3. Press arrow key until

the menu “Linc” appears (see Figure 27).

4. Press key. The

instrument will display “SEL” and the “User” Icon (see

Figure 28).

Any additional display of KCl, NaCl or 442 icons indicates a “Linc” between the User solution and the other solution displayed.

5. Press or

keys

to select a Standard Solution to be linked to the User mode calibration constant. In Figure 29 the display indicates that “User” is linked to “KCl”.

If none of the Solution Selection icons are displayed (i.e., KCl, NaCl or

442), nothing has been linked to User mode.

6. Press key to accept the setting. Pressing any of the

measurement keys will exit without changing the setting. User mode “Linc” is now complete. The User mode will now use the calibration gain constant used for the calibration of the Standard Solution as outlined above.

C. Canceling User mode Calibration “Linc” The Ultrameter II must be in “User” linked mode in order to cancel the “Linc” (ref. SOLUTION SELECTION, pg. 14).

1. Press “Linked” measurement key ,

Two solution icons will be shown in the left side of display “User” and another, e.g., “KCl”.

2. Press key until the menu “Linc” appears (see Figure 27).

3. Press key; the instrument will display both “SEL” and

the “User” Icon.

4. Press key until “User” is the only solution icon being

displayed.

5. Press key.

6. The User mode calibration “Linc” has now been canceled.

NOTES:

1. To maintain repeatability, use the same standard solutions for future calibrations.

2. Calibration of the Ultrameter II Gain Factor for User mode is not available when the calibration linc has been established. The other calibration functions (i.e., Temperature Compensation %/C settings and TDS Ratio settings) are still intact. To perform a calibration of the User mode as described in User Calibration Conductivity/TDS, pg. 18, the User mode Linc should be canceled. See above, “Canceling User mode calibration “Linc””.

or .

3. Once a “Linc” has been established for User mode , the “Linc” will apply to all measurement modes using User solution

selection (i.e., TDS/User, Cond/User or Res/User).

XVI. bluDock™ WIRELESS DATA TRANSFER INSTRUCTIONS

Figure 30

Figure 31

NOTE:

Bluetooth®

is a registered trademark of Bluetooth SIG. The

bluDock Bluetooth module is a registered Bluetooth device.

Requires Myron L bluDock™ accessory package, Model # BLUDOCK. Package includes Ultrameter II hardware modication that allows the unit to communicate wirelessly with a personal computer congured for

wireless device communication. Package also includes U2CI software application that will operate on Windows XP, Vista and 7*, and Macintosh OSX** based computer systems and Bluetooth USB adapter (dongle) for computers that do not have Bluetooth capability.

A. Software Installation Follow the instructions in the “U2CI Software Installation Guide” that was shipped with your blueDock equipped instrument or download it from the Myron L Company website.

http://www.myronl.com/main/U2CI_Application_DL.htm

B. Hardware Setup For a computer without

Bluetooth®

capability:

If you don’t have the dongle that came with the BLUDOCK, one can be

ordered separately from the Myron L Company. Order Model # BDDO.

Plug in your dongle and install per manufacturer’s instructions.

For computers with Bluetooth

capability/Bluetooth dongle installed:

First time use of the bluDock:

1. Press any parameter button

to turn the Ultrameter II on.

2. Put the Ultrameter II in “PC

On” mode by pressing the

key until “PC OFF”

appears (see Figure 30).

3. Then press the key.

“PC On” will be displayed (see Figure 31).

NOTE: “PC Ini” may momentarily be

Figure 32

displayed while initializing (see Figure 32).

4. Add bluDock to your Bluetooth devices per your operating system procedure.

THE BLUDOCK DEVICE PASSKEY IS 1234.

5. After pairing, note the number of the COM port assigned by the computer. In Windows XP, note the number of the outgoing COM port assigned by the computer.

NOTE: The unit will automatically power down after 60 sec. If the unit powers down during pairing, repeat steps 1-3 above and continue.

C. Memory Stack Download

1. With the Ultrameter II in “PC On” mode, open the U2CI software application.

2. Verify that the port selected matches the COM port number noted (rst time only). This is the outgoing COM port on Windows XP.

3. In the U2CI application, click on the data download button. A data transfer bar will appear while the data is being downloaded.

Once downloaded, the data may be manipulated, printed or stored within the Myron L U2CI application, or the data may be exported to another more powerful spreadsheet

***,

such as

Excel*.

Additional features such as assigning a name to the unit, setting time and date and erasing data are available. See U2CI Operation Manual or visit our website for the latest instructions:

http://myronl.com/main/U2CI_Application_DL.htm

4. Upon completion, click on the “disconnect” icon.

5. Turn off Ultrameter II PC download mode by selecting any measurement function. Failure to do so will reduce battery life.

* Windows 2000, 2007, XP & Vista and Excel are registered trademarks of Microsoft

Corporation.

** Macintosh OSX is a registered trademark of Apple Computer Inc.

*** Please Note: Although the Myron L Company has performed extensive testing, we cannot guarantee compatibility of all applications and formats. We suggest testing your application and format for compatibility before relying on it.

XVII. CARE and MAINTENANCE

Ultrameter IIs should be rinsed with clean water after use. Solvents should be avoided. Shock damage from a fall may cause instrument failure.

A. Temperature Extremes

Solutions in excess of 71°C/160°F should not be placed in the cell cup area; this may cause damage. The pH sensor may fracture if the

Ultrameter II temperature is allowed to go below 0°C/32°F. Care should be exercised not to exceed rated operating temperature.

Leaving the Ultrameter II in a vehicle or storage shed on a hot day can easily subject the instrument to over 66°C/150°F. This will void the warranty.

B. Battery Replacement Dry Instrument THOROUGHLY. Remove the four (4) bottom screws. Open instrument carefully. Carefully detach battery from circuit board. Replace with 9 volt alkaline battery. Replace bottom, ensuring the sealing gasket is installed in the groove of the top half of case. Re-install screws, tighten evenly and securely.

NOTE: Because of nonvolatile EEPROM circuitry, all data stored in memory and all calibration settings are protected even during power

loss or battery replacement. However, loss of time and date may occur if battery is removed for longer than 3 minutes (180 seconds).

C. pH/ORP Sensor Replacement (6PFCE)

Order model RPR. When ordering, be sure to include the model and serial number of your instrument to ensure receipt of the proper type. Complete installation instructions are provided with each replacement sensor.

D. Cleaning Sensors

1. Conductivity/TDS/Resistivity

The conductivity cell cup should be kept as clean as possible. Flushing with clean water following use will prevent buildup on electrodes.

However, if very dirty samples — particularly scaling types — are allowed to dry in the cell cup, a lm will form. This lm reduces accuracy. When there are visible lms of oil, dirt, or scale in the cell cup or on the

electrodes, use isopropyl alcohol or a foaming non-abrasive household cleaner. Rinse out the cleaner and your Ultrameter II is again ready for accurate measurements.

2. pH/ORP (6PFCE)

The unique pH/ORP sensor in your Ultrameter II is a nonrellable

combination type that features a porous liquid junction.

It should not be

allowed to dry out.

pH/ORP SENSOR Top View

ORP Electrode

pH Glass Electrode

Sensor Body

Reference Junction under Glass pH Bulb

be rejuvenated by rst cleaning the sensor well with Isopropyl alcohol or

a liquid spray cleaner such as Windex™ or Fantastic™ and rinsing well.

Do not scrub or wipe the pH/ORP sensor.

Then use one of the following methods:

1. Pour a HOT salt solution ~60°C/140°F — a potassium chloride (KCI) solution such as Myron L pH/ORP Sensor Storage Solution is preferable, but HOT tap water with table salt (NaCl) will work ne — in the sensor well and allow to cool. Retest.

2. Pour DI water in the sensor well and allow to stand for no more than 4 hours (longer can deplete the reference solution and damage the glass bulb). Retest.

If neither method is successful, the sensor must be replaced.

“Drifting” can be caused by a lm on the pH sensor bulb and/or reference.

Use isopropyl alcohol (IPA) or spray a liquid cleaner such as Windex™ or Fantastic™ into the sensor well to clean it. The sensor bulb is very

thin and delicate. Do not scrub or wipe the pH/ORP sensor.

However, if this occurs, the sensor may sometimes

Leaving high pH (alkaline) solutions in contact with the pH sensor for

long periods of time is harmful and will cause damage. Rinsing such

liquids from the pH/ORP sensor well and relling it with Myron L Storage Solution, a saturated KCl solution, pH 4 buffer, or a saturated solution of

table salt and tap water, will extend the useful life.

Samples containing chlorine, sulfur, or ammonia can “poison” any pH electrode. If it is necessary to measure the pH of any such sample,

thoroughly rinse the sensor well with clean water immediately after taking the measurement. Any sample element that reduces (adds an electron to) silver, such as cyanide, will attack the reference electrode.

Replacement sensors are available only from the Myron L Company or its authorized distributors (see Replacement pH/ORP Sensor (6PFCE), pg. 39).

XVIII. TROUBLESHOOTING CHART

Symptom Possible Cause Corrective Action

No display, even though measurement key pressed

Inaccurate pH readings (6PFCE) 1. pH calibration needed. Ref. pH Cal.,

No response to pH changes (6PFCE) Sensor bulb is cracked or an

Will not adjust down to pH 7 (6PFCE) pH/ORP sensor has lost KCl. Clean and rejuvenate sensor (ref. Cleaning Sensors, pg. 34) and recalibrate. If no

pH readings drift or respond slowly to changes in buffers/samples or “FAC” is displayed repeatedly (6PFCE)

Unstable Conductivity/TDS/ Resistivity readings

Unable to calibrate Conductivity/TDS Film or deposits on electrodes. Clean cell cup and electrodes. Ref. Cleaning Sensors, pg. 34.

Resistivity readings much lower than expected

Battery weak or not connected. Check connections or replace battery. Ref. Battery Replacement, pg. 34.

pg. 19.

2. Cross-contamination from residual pH buffers or samples in sensor well.

3. Calibration with expired pH buffers.

electromechanical short caused by an internal crack.

1. Temporary condition due to memory” of

solution in pH sensor well for long periods.

2. Bulb dirty or dried out.

3. Reference junction clogged or coated.

1. Dirty electrodes.

2. Actual resistance is changing due to atmospheric contamination.

1. Contamination from previous sample or

from pH sensor well.

2. Carbon dioxide in test sample.

Low ORP Reading Slow or no response to ORP changes (6PFCE)

FCE responds very slowly or returns an atypically high Predictive ORP value (6PFCE).

ORP platinum electrode is dirty. Check the ORP sensor functioning. Take an ORP reading of Myron L pH/ORP

1. Dirty platinum electrode (see above).

2. ORP sensor memory/battery effect. Some ORP sensors exhibit a residual charge when measuring LOW Free Chlorine concentrations soon after measuring a HIGH Free Chlorine concentration.

1. Recalibrate instrument.

2. Thoroughly rinse sensor well.

3. Recalibrate using fresh buffers. Ref. pH Buffer Solutions, pg. 38.

Replace pH/ORP sensor. Ref. Replacement pH/ORP Sensor, pg. 39.

improvement, replace pH/ORP sensor (ref. Replacement pH/ORP Sensor, pg. 39).

Clean and rejuvenate sensor (ref. Cleaning Sensors, pg. 34) and recalibrate. If no

improvement, replace pH/ORP sensor (ref. Replacement pH/ORP Sensor, pg. 39).

1. Clean cell cup and electrodes. Ref. Cleaning Sensors, pg. 34.

2. Minimize test sample exposure to air by taking a owing sample. Ref. Measuring Resistivity, pg. 10.

1. Rinse cell cup more thoroughly before measurement. Ensure pH cap is snugly in place.

2. See Measuring Resistivity, pg. 10.

Sensor Storage Solution (ref. pH Sensor Storage Solution (6PFCE), pg. 38). If the

reading is outside the range of 350-400 mV, clean ONLY the platinum ORP electrode with Myron L ORP Conditioner solution-soaked cotton swab (ref. ORP Sensor Conditioner Solution (6PFCE), pg. 38), being careful not to touch the swab to

the glass bulb of the pH sensor.

1. Rinse the pH/ORP sensor well briey with a small amount of ORP Sensor

Conditioner Solution. DO NOT leave the conditioning solution in the sensor well for more than 10 seconds.

2. Rinse the pH/ORP sensor 3 times with Sensor Storage Solution.

3. Fill the sensor well with Sensor Storage Solution and let rest for 5 minutes.

XIX. ACCESSORIES NOTE: MSDSs are available on the Myron L website for all solutions: http://www.myronl.com/main/Material_Safety_DS_DL.htm

A. Conductivity/TDS Standard Solutions Your Ultrameter II has been factory calibrated with the appropriate Myron L Company NIST traceable KCl, NaCl, and our own 442™ standard solutions. Most Myron L conductivity standard solution bottles

show three values referenced at 25°C: Conductivity in microsiemens/ micromhos, the ppm/TDS equivalents (based on our 442 Natural

Water™) and NaCl standards. All standards are within ±1.0% of reference solutions.

1. Potassium Chloride (KCl)

The concentrations of these reference solutions are calculated from

data in the International Critical Tables, Vol. 6. The 7000 µS is the

recommended standard.

2. 442 Natural Water™

442 Natural Water Standard Solutions are based on the following salt proportions: 40% sodium sulfate, 40% sodium bicarbonate, and 20% sodium chloride, which represent the three predominant components (anions) in freshwater. This salt ratio has conductivity characteristics approximating fresh natural waters and was developed by the Myron L Company over four decades ago. It is used around the world for measuring both conductivity and TDS in drinking water, ground water, lakes, streams, etc. 3000 ppm is the recommended standard.

Available in 2 oz., quarts/liters, and gallon/~3.8 liter bottles.

Order KCL-7000

Order 442-3000

3. Sodium Chloride (NaCl)

This is especially useful in sea water mix applications, as sodium chloride is the major salt component. Most Myron L standard solution labels show the ppm NaCl equivalent to the conductivity and to ppm 442 values. The

14.0 mS is the recommended standard.

B. pH Buffer Solutions (6PFCE) pH buffers are available in pH values of 4, 7 and 10. Myron L Company buffer solutions are traceable to NIST certied pH references and are color-coded for instant identication. They are also mold inhibited and

accurate to within ±0.01 pH units @ 25°C. Order 4, 7 or 10 Buffer.

Order NACL-14.0

Available in 2 oz., quarts/liters, and gallon/~3.8 liter bottles. Order SS.

C. pH Sensor Storage Solution (6PFCE) Myron L pH Sensor Storage Solution prolongs the life of the pH sensor.

Available in 2 oz., quarts/liters, and gallon/~3.8 liter bottles.

D. ORP Sensor Conditioner Solution (6PFCE)

Myron L ORP Conditioner Solution removes contaminants and conditions the ORP electrode.

Available in 1 oz. Order ORPCOND1OZ

E. Soft Protective Carry Cases Padded Nylon carrying case features a belt clip for hands-free mobility. Two colors to choose from:

Blue - Model #: UCC Desert Tan - Model #: UCCDT

F. Hard Protective Carry Cases Large case with 2 oz. bottles of calibration standard solutions (KCl-7000,

442-3000, 4, 7, & 10 pH buffers and pH storage solution).

Small case (no calibration standard solutions) -

G. Replacement pH/ORP Sensor (6PFCE) pH/ORP sensor is gel lled and features a unique porous liquid junction.

It is user-replaceable and comes with easy to follow instructions.

Model #: UPP

Model #: PKUU

Model #: RPR

H. bluDock™ Wireless Data Transfer Accessory Package

This accessory allows the operator to download the Ultrameter II memory stack to a spreadsheet on a computer. The package includes

bluDock modied circuit board in the unit, software CD, installation and

operating instructions, and dongle.

XX. TEMPERATURE COMPENSATION (Tempco) of Aqueous Solutions

Electrical conductivity indicates solution concentration and ionization of the dissolved material. Since temperature greatly affects ionization, conductivity measurements are temperature dependent and are normally corrected to read what they would be at 25°C.

Model #: BLUDOCK

A. Standardized to 25°C Conductivity is measured with great accuracy in the Ultrameter II using a

method that ignores ll level, electrolysis, electrode characteristics, etc.,

and features a microprocessor to perform temperature compensation. In simpler instruments, conductivity values are usually assigned an average correction similar to that of KCl solutions for correction to 25°C. The correction to an equivalent KCl solution is a standard set by chemists that standardizes the measurements and allows calibration with precise KCl solutions. In the Ultrameter II, this correction can be set to other solutions or tailored for special measurements or applications.

B. Tempco Variation Most conductivity instruments use an approximation of the temperature characteristics of solutions, perhaps even assuming a constant value.

The value for KCl is often quoted simply as 2%/°C. In fact, KCl tempco

varies with concentration and temperature in a non-linear fashion. Other solutions have more variation still. The Ultrameter II uses corrections that change with concentration and temperature instead of single average values. See Chart 1, pg. 40.

Chart 1

0 5 10 15 20 25 30 35 40 45 50 55 60

1.500%

1.600%

1.700%

1.800%

1.900%

2.000%

2.100%

2.200%

2.300%

2.400%

2.500%

KCl % / °C

% / °C

Temperature

C. An Example of 2 different solution selections and the resulting compensation

How much error results from treating natural water as if it were KCl at

15°C?

A tap water solution should be compensated as 442 with a tempco of

1.68 %/°C, where the KCl value used would be 1.90 %/°C.

Suppose a measurement at 15°C/59°F is 900 microsiemens of true

uncompensated conductivity.

Using a 442 correction of 10 (degrees below 25) x 1.68% indicates the solution is reading 16.8% low. For correction, dividing by (.832) yields 1082 microsiemens as a compensated reading.

A KCl correction of 10 (degrees below 25) x 1.9% indicates the solution

is reading 19% low. Dividing by (.81) yields 1111 microsiemens for a compensated reading. The difference is 29 out of 1082 = 2.7%.

D. A Chart of Comparative Error

In the range of 1000 µS, the error using KCl on a solution that should

be compensated as NaCl or as 442, is illustrated in Chart 2 on pg. 41. Users wanting to measure natural water based solutions to 1% would have to alter the internal compensation to the more suitable preloaded “442” values or stay close to 25°C. Users who have standardized to KCl- based compensation may want to stick with it, regardless of increasing error as you get further from 25°C. The Ultrameter II will provide the repeatability and convertibility of data necessary for relative values for process control.

Chart 2

(1)%

(2)%

0 5 10 15 20

30 35 40 45 50

Temperature

NaCl error with KCl tempco

442 error with KCl tempco

E. Other Solutions A salt solution like sea water or liquid fertilizer acts like NaCl. An internal correction for NaCl can be selected for greatest accuracy with such solutions. Many solutions are not at all similar to KCl, NaCl or 442. A sugar solution, or a silicate, or a calcium salt at a high or low temperature may require a User value peculiar to the application to provide readings close to the true compensated conductivity.

Clearly, the solution characteristics should be chosen to truly represent the actual water under test for rated accuracy of ±1%. Many industrial applications have historically used relative measurements seeking a number to indicate a certain setpoint or minimum concentration or trend. The Ultrameter II gives the user the capability to collect data in “KCl conductivity units” to compare to older published data, in terms of NaCl or 442, or as appropriate. The Ultrameter II can be used to reconcile data taken with other compensation assumptions, especially with its ability to allow custom characteristics through the User mode.

XXI. CONDUCTIVITY CONVERSION to TOTAL DISSOLVED SOLIDS (TDS)

A. How it’s Done Once the effect of temperature is removed, the compensated conductivity is a function of the concentration (TDS). Temperature compensation of the conductivity of a solution is performed automatically by the internal processor with data derived from chemical tables. Any dissolved salt at a known temperature has a known ratio of conductivity to concentration. Tables of conversion ratios referenced to 25°C have been published by chemists for decades.

B. Solution Characteristics Real world applications have to measure a wide range of materials and mixtures of electrolyte solutions. To address this problem, industrial users commonly use the characteristics of a standard material as a model for their solution, such as KCl, which is favored by chemists for its stability.

Users dealing with sea water, etc., use NaCl as the model for their concentration calculations. Users dealing with freshwater work with mixtures including sulfates, carbonates and chlorides, the three predominant components (anions) in freshwater that the Myron L Company calls “Natural Water”. These are modeled in a mixture called “442™” which the Myron L Company markets for use as a calibration standard, as it does standard KCl and NaCl solutions.

The Ultrameter II contains algorithms for these 3 most commonly referenced compounds. The solution type in use is displayed on the

left. Besides KCl, NaCl, and 442, there is the User choice. The benet

of the User solution type is that one may enter the temperature compensation and TDS ratio by hand, greatly increasing accuracy of

readings for a specic solution. That value remains a constant for all

measurements and should be reset for different dilutions or temperatures.

C. When does it make a lot of difference? First, the accuracy of temperature compensation to 25°C determines the accuracy of any TDS conversion. Assume we have industrial process

water to be pretreated by RO. Assume it is 45°C and reads 1500 µS

uncompensated.

1. If NaCl compensation is used, an instrument would report 1035

µS compensated, which corresponds to 510 ppm NaCl.

2. If 442 compensation is used, an instrument would report 1024

µS compensated, which corresponds to 713 ppm 442.

The difference in values is 40%.

In spite of such large error, some users will continue to take data in the NaCl mode because their previous data gathering and process monitoring was done with an older NaCl referenced device.

Selecting the correct Solution Type on the Ultrameter II will allow the user to attain true TDS readings that correspond to evaporated weight.

If none of the 3 standard solutions apply, the User mode must be used. Temperature Compensation (Tempco) and TDS Derivation below, details the User mode.

XXII. TEMPERATURE COMPENSATION (Tempco) and TDS DERIVATION

The Ultrameter II contains internal algorithms for characteristics of the 3 most commonly referenced compounds. The solution type in use is displayed on the left. Besides KCl, NaCl, and 442, there is the User

choice. The benet of User mode is that one may enter the tempco and

TDS conversion values of a unique solution via the keypad.

A. Conductivity Characteristics When taking conductivity measurements, the Solution Selection determines the characteristic assumed as the instrument reports what a measured conductivity would be if it were at 25°C. The characteristic is represented

by the tempco, expressed in %/°C. If a solution of 100 µS at 25°C increases to 122 µS at 35°C, then a 22% increase has occurred over this change of 10°C. The solution is then said to have a tempco of 2.2 %/°C.

Tempco always varies among solutions because it is dependent on their individual ionization activity, temperature and concentration. This is why the Ultrameter II features mathematically generated models for known salt characteristics that also vary with concentration and temperature.

B. Finding the Tempco of an Unknown Solution One may need to measure compensated conductivity of some solution

unlike any of the 3 standard salts. In order to enter a custom xed tempco for a limited measurement range, enter a specic value through the

User function. The tempco can be determined by 2 different methods:

1. Heat or cool a sample of the solution to 25°C, and measure its conductivity. Heat or cool the solution to a typical temperature

where it is normally measured. After selecting User function, set

the tempco to 0 %/°C as in Disabling Temperature Compensation,

pg. 15 (No compensation). Measure the new conductivity and the new temperature. Divide the % decrease or increase by the 25°C value. Divide that difference by the temperature difference.

2. Heat or cool a sample of the solution to 25°C, and measure its

conductivity. Change the temperature to a typical measuring temperature. Set the tempco to an expected value as in User Programmable Temperature Compensation, pg. 15. See if the compensated value is the same as the 25°C value. If not, raise or lower the tempco and measure again until the 25°C value is read.

C. Finding the TDS Ratio of an Unknown Solution Once the effect of temperature is removed, the compensated conductivity is a function of the concentration (TDS).

There is a ratio of TDS to compensated conductivity for any solution, which varies with concentration. The ratio is set during calibration in User mode as in User Programmable Conductivity to TDS Ratio, pg. 16.

A truly unknown solution has to have its TDS determined by evaporation and weighing. Then the solution whose TDS is now known can be measured for conductivity and the ratio calculated. Next time the same solution is to be measured, the ratio is known.

XXIII. pH and ORP (6PFCE)

A. pH (6PFCE)

1. pH as an Indicator (6PFCE) pH is the measurement of Acidity or Alkalinity of an aqueous solution. It is also stated as the Hydrogen Ion activity of a solution. pH measures

the effective, not the total, acidity of a solution.

A 4% solution of acetic acid (pH 4, vinegar) can be quite palatable, but a 4% solution of sulfuric acid (pH 0) is a violent poison. pH provides the

needed quantitative information by expressing the degree of activity of an acid or base.

In a solution of one known component, pH will indicate concentration indirectly. However, very dilute solutions may be very slow reading, just

because the very few ions take time to accumulate.

2. pH Units (6PFCE) The acidity or alkalinity of a solution is a measurement of the relative

availabilities of hydrogen (H+) and hydroxide (OH-) ions. An increase in (H+) ions increases acidity, while an increase in (OH-) ions increases alkalinity. The total concentration of ions is xed as a characteristic

of water, and balance would be 10

mol/liter (H+) and (OH-) ions in a

neutral solution (where pH sensors give 0 voltage).

pH is dened as the negative logarithm of hydrogen ion concentration. Where (H+) concentration falls below 10-7, solutions are less acidic than

neutral, and therefore are alkaline. A concentration of 10-9 mol/liter of

(H+) would have 100 times less (H+) ions than (OH-) ions and be called an alkaline solution of pH 9.

3. The pH Sensor (6PFCE) The active part of the pH sensor is a thin glass surface that is selectively

receptive to hydrogen ions. Available hydrogen ions in a solution will accumulate on this surface and a charge will build up across the glass interface. The voltage can be measured with a very high impedance voltmeter circuit; the dilemma is how to connect the voltmeter to solution on each side.

The glass surface encloses a captured solution of potassium chloride holding an electrode of silver wire coated with silver chloride. This is the most inert connection possible from a metal to an electrolyte. It can

Glass surface

Figure 33

KCl solution

Electrode wire

Electrode

wire

ions

Junction Plug

KCl solution

Figure 34

Junction plug

Platinum button

H+ ions

Electrode wires

Glass

Surface

still produce an offset voltage, but using the same materials to connect to the solution on the other side of the membrane causes the 2 equal offsets to cancel.

The problem is, on the other side of the membrane is an unknown test solution, not potassium chloride. The outside electrode, also called the Reference Junction, is of the same construction with a porous plug in place of a glass barrier to allow

the junction uid to contact the test solution without signicant migration

of liquids through the plug material. Figure 33 shows a typical 2 component pair. Migration does occur, and this limits the lifetime of a

pH junction from depletion of solution

inside the reference junction or from contamination. The junction may be damaged if dried out because insoluble crystals may form in a layer, obstructing contact with test

solutions. See pH and ORP, pg. 44.

4. The Myron L Integral

pH Sensor (6PFCE) The sensor in the Ultrameter II (see Figure 34) is a single construction in an easily replaceable package. The sensor body holds an oversize solution supply for long life. The reference junction “wick” is porous to provide a very stable, low permeable interface, and is located

under the glass pH sensing

electrode. This construction combines all the best features of

any pH sensor known.

5. Sources of Error (6PFCE)

The basics are presented in pH and ORP, pg. 44.

a. Reference Junction The most common sensor problem will be a clogged junction because a sensor was allowed to dry out. The symptom is a drift in the “zero” setting

at 7 pH. This is why the Ultrameter II 6PFCE does not allow more than 1 pH unit of offset during calibration. At that point the junction is unreliable.

b. Sensitivity Problems

Sensitivity is the receptiveness of the glass surface. A lm on the surface

can diminish sensitivity and cause a long response time.

c. Temperature Compensation

pH sensor glass changes its sensitivity slightly with temperature, so the further from pH 7 one is, the more effect will be seen. A pH of 11 at 40°C

would be off by 0.2 units. The Ultrameter II 6PFCE senses the sensor well temperature and compensates the reading.

B. ORP/Oxidation-Reduction Potential/REDOX (6PFCE)

1. ORP as an Indicator (6PFCE) ORP is the measurement of the ratio of oxidizing activity to reducing activity in a solution. It is the potential of a solution to give up electrons (oxidize other things) or gain electrons (reduce).

Like acidity and alkalinity, the increase of one is at the expense of the other, so a single voltage is called the Oxidation-Reduction Potential, with a positive voltage showing, a solution wants to steal electrons (oxidizing agent). For instance, chlorinated water will show a positive ORP value.

2. ORP Units (6PFCE) ORP is measured in millivolts, with no correction for solution temperature.

Like pH, it is not a measurement of concentration directly, but of activity

level. In a solution of only one active component, ORP indicates

concentration. Also, as with pH, a very dilute solution will take time to

accumulate a readable charge.

3. The ORP Sensor (6PFCE) An ORP sensor uses a small platinum surface to accumulate charge without reacting chemically. That charge is measured relative to the solution, so the solution “ground” voltage comes from a reference

junction - same as the pH sensor uses.

4. The Myron L ORP Sensor (6PFCE) Figure 34, pg. 45, shows the platinum button in a glass sleeve. The

same reference is used for both the pH and the ORP sensors. Both pH and ORP will indicate 0 for a neutral solution. Calibration at zero

compensates for error in the reference junction.

A zero calibration solution for ORP is not practical, so the Ultrameter II 6PFCE uses the offset value determined during calibration to 7 in pH

calibration (pH 7 = 0 mV). Sensitivity of the ORP surface is xed, so

there is no gain adjustment either.

5. Sources of Error (6PFCE)

The basics are presented in pH and ORP, pg. 44, because sources of error are much the same as for pH. The junction side is the same, and though the platinum surface will not break like the glass pH surface, its protective glass sleeve can be broken. A surface lm will slow

the response time and diminish sensitivity. It can be cleaned off with

detergent or acid, as with the pH glass.

C. Free Chlorine

1. Free Chlorine as an Indicator of Sanitizing Strength

Chlorine, which kills bacteria by way of its power as an oxidizing agent, is the most popular germicide used in water treatment. Chlorine is not only used as a primary disinfectant, but also to establish a

sufcient residual level of Free Available Chlorine (FAC) for ongoing

disinfection.

FAC is the chlorine that remains after a certain amount is consumed by killing bacteria or reacting with other organic (ammonia, fecal matter) or inorganic (metals, dissolved CO2, Carbonates, etc) chemicals in solution. Measuring the amount of residual free chlorine in treated water is a well accepted method for determining its effectiveness in microbial control.

The Myron L Company FCE method for measuring residual disinfecting

power is based on ORP, the specic chemical attribute of chlorine (and

other oxidizing germicides) that kills bacteria and microbes.

2. FCE Free Chlorine Units

The 6PIIFCE is the rst handheld device to detect free chlorine directly, by measuring ORP. The ORP value is converted to a concentration reading (ppm) using a conversion table developed by Myron L Company through a series of experiments that precisely controlled chlorine levels and excluded interferants.

Other test methods typically rely on the user visually or digitally interpreting a color change resulting from an added reagent-dye. The

reagent used radically alters the sample’s pH and converts the various

chlorine species present into a single, easily measured species. This

ignores the effect of changing pH on free chlorine effectiveness and

disregards the fact that some chlorine species are better or worse sanitizers than others.

The Myron L Company 6PIIFCE avoids these pitfalls. The chemistry of the test sample is left unchanged from the source water. It accounts for

the effect of pH on chlorine effectiveness by including pH in its calculation.

For these reasons, the Ultrameter II’s FCE feature provides the best reading-to-reading picture of the rise and fall in sanitizing effectivity of free available chlorine.

The 6PIIFCE also avoids a common undesirable characteristic of other ORP-based methods by including a unique Predictive ORP value in its FCE calculation. This feature, based on a proprietary model for ORP

sensor behavior, calculates a nal stabilized ORP value in 1 to 2 minutes

rather than the 10 to 15 minutes or more that is typically required for an ORP measurement.

XXIV. SOFTWARE VERSION

Figure 35

Contact the Myron L Company to see if a software upgrade is available.

1. Press

key.

2. Press key until three

numbers are displayed as shown in Figure 35.

3. Press key, instrument

will time out in ~15 seconds.

XXV. GLOSSARY

Anions Negatively charged ions.

See Solution Characteristics, pg. 42.

Algorithm A procedure for solving a mathematical problem. See Temperature Compensation (Tempco) and TDS Derivation, pg. 43.

FAC Free Available Chlorine. The amount of chlorine that remains active in solution and is available for ongoing disinfection. See Free Chlorine as an Indicator, pg. 47.

FCE FCE™ directly measures ORP, the germ killing

property of chlorine and other oxidizing germicides. It displays both the ORP reading (in mVDC) as well as an equivalent free chlorine concentration (in familiar ppm). For more information see FCE™:

Groundbreaking Measurement of Free Chlorine Disinfecting Power in a Hand-Held Instrument on

the Myron L Company website.

Logarithm An arithmetic function. The inverse of an exponential

function. See pH Units, pg. 44.

ORP Oxidation-Reduction Potential or REDOX, See ORP/ Oxidation-Reduction Potential/REDOX, pg. 46.

REDOX An abbreviation for Reduction-Oxidation reactions. Reaction This is the basic electrochemical process by which

chlorine destroys microbes by grabbing electrons from the microbe’s proteins, denaturing the protein and killing the organism. ORP directly measures the strength of a solutions’ REDOX potential and, therefore, sanitizing strength.

TDS Total Dissolved Solids or the Total Conductive Ions in a solution. See Conductivity Conversion to Total Dissolved Solids (TDS), pg. 41.

Tempco Temperature Compensation See Temperature Compensation of Aqueous Solutions, pg. 39.

User A mode of operation that allows the instrument user

(operator) to set a tempco and/or a TDS factor for their specic solution type. See Temperature

Compensation of Aqueous Solutions, pg. 39 and Temperature Compensation (Tempco) and TDS Derivation, pg. 43.

For details on specic areas of interest refer to the Table of Contents.

HigH Performance features:

• Accuracy of ±1% of

READING ±.2% at Calibration Point

• Reliable Repeatable

Results

• KCl, NaCl and 442™

Natural Water Modes

• Automatic Temperature

Compensation

• Autoranging

• Durable, Fully

Encapsulated Electronics

• Waterproof

• Powered by 1 N Type

Battery (included)

MYRON L COMPANY

2450 Impala Drive

Carlsbad, CA 92010-7226

USA

Tel: +1-760-438-2021

Fax: +1-760-931-9189

E-Mail: info@myronl.com techquestions@myronl.com

www.myronl.com

Made In USA

UMIIFCEOM 20SEP13

Myron L 6PFCE User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual