Myron L MLJ-PS6SI Operation Manual

16 November 10

Operation

Manual

POOLPRO

™

PLEASE NOTE:

Because of our commitment to product improvement, the substance
and style of this manual may change. When changes are made,
the updated manual is posted for download in PDF format from the
Myron L Website: www.myronl.com

i

BUFFER

°C°F

ORP TDSpHCOND

PS6

MIN

SALT

si

bluDock Enabled

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

(strap 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

Displayed here:

• Temperature

readout

• Memory Storage/

Recall

• pH Calibration

ORP

Electrode

pH Glass

Electrode

pH/ORP Sensor

(Replaceable)

Instrument
Illustration

Temperature
Sensor

Date & Time
displayed here

Measurement

P OOLP RO

™

Units Of Measurement

Parameter

mS - millisiemens/cm

(millimhos/cm)

µS - microsiemens/cm

(micromhos/cm)

PPM - parts per million

PPM - parts per million

PPT - parts per thousand

mV - millivolts

Conductivity

MIN/SALT

TDS

ORP

Mineral/Salt
TDS of NaCl

13 May 10

Free Chlorine

For detailed explanations see Table of Contents

MODEL PS6si

Shown with bluDock™ option installed

ii

1

I. INTRODUCTION

Thank you for selecting the feature-packed Po o l Pr o ™, 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.

The Po o l Pr o measures conductivity, Mineral/SALT (Sodium Chloride/
NaCl), Total Dissolved Solids (TDS), pH, ORP/Redox and Temperature
in one simple to use instrument. Model PS6si has been redesigned to
include free chlorine measurements, an LSI & Hardness Calculator for
water balance analysis, and

Bluetooth®

data transfer with the bluDock™
option. Additional features include a clock with time and date, a 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 instrument 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.

For your convenience, a brief set of instructions is provided on the
bottom side of your Po o l Pr o .

Special note.....Conductivity, Mineral/Salt, and TDS require mathematical

correction to 25°C values (ref. Temperature Compensation, pg. 33). On

the left of the Po o l Pr o ’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, or

442™. Selection affects the temperature correction of conductivity, and

the calculation of TDS from compensated conductivity (ref. Conductivity

Conversion to Total Dissolved Solids (TDS), pg. 36). 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 Mineral/Salt, and 442 for TDS will reect present industry

practice for standardization. This is how your instrument, as shipped
from the factory, is set to operate.

2

II. FEATURES and SPECIFICATIONS

A. Features

•

Bluetooth®

wireless download capability with optional bluDock™

• ORP mV to ppm free chlorine conversion

• Langelier Saturation Index & Hardness Calculator

• Ranges:
Conductivity, Min/Salt, TDS — 0-200,000 µS/ppm
pH − 0-14
ORP − ±999 mV; 0.20-9.99 ppm free chlorine

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

• Accuracy of BETTER than ±1% of reading in a handheld instrument
±0.1% at calibration point

• All sensors are internal for maximum protection

• Improved 4 electrode sensor technology

• Waterproof to 1 meter/3 feet

• Autoranging conductivity/TDS

• Factory calibrations stored in microprocessor

• Prompts for easy pH calibration

• 3 conductivity/TDS solution conversions preprogrammed into

microprocessor

• Real Time Clock with Time and Date

• Data Logging with TIME and DATE in memory

• Memory stores 100 readings

• User adjustable timeout “Auto OFF”

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/MIN/SALT/TDS Cell Material VALOX*

Cond/TDS Electrodes (4) 316 Stainless Steel
Cond/MIN/SALT/TDS Cell Capacity 5 ml/0.2 oz.
pH/ORP Sensor Well Capacity 1,2 ml (6Psi)/0.04 oz.
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

3

C. Specication Chart

The LSI Calculator hardness range is limited to 0.0 - 1710 ppm and

0.0 - 100 grains of hardness.

D. Warranty/Service

The Myron L Po o l Pr o ™, excluding the pH/ORP sensor, has a Two (2)
year limited warranty. The pH/ORP sensor has a six (6) month limited
warranty for materials and workmanship. If an instrument fails to operate

properly, see Troubleshooting Chart, pg. 30. 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

[phone]
E-Mail: [e-mail]
[e-mail]

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
Po o l Pr o only. The Myron L Company assumes no other responsibility
or liability.

0.01 (<100 ppm)

0.1 (<1000 ppm)

1.0 (<10 ppt)

0.01 (<100 ppt)

0.1 (<200 ppt)

0-9999 ppm

10-200 ppt

in 5 autoranges

0-9999 µS/cm

10-200 mS/cm

in 5 autoranges

±1% of reading

±1% of reading

±1% of reading

0.01 (<100 µS)

0.1 (<1000 µS)

1.0 (<10 mS)

0.01 (<100 mS)

0.1 (<200 mS)

0.1° C/F

.01 pH

1 mV

±0.1 °C

0-71 °C

32 - 160 °F

Auto

Temperature

Resolution

Ranges

0-14 pH

±999 mV

Accuracy

±.01 pH**

±1 mV

0-71 °C

0-71 °C

0-71 °C

0-71 °C

Conductivity

pH

ORP

Free Chlorine

Mineral/Salt*

Temperature

TDS

0-9999 ppm

10-200 ppt

in 5 autoranges

0.01 (<100 ppm)

0.1 (<1000 ppm)

1.0 (<10 ppt)

0.01 (<100 ppt)

0.1 (<200 ppt)

Cond/TDS

Ratios

Preprogrammed

KCl, NaCl, 442™

0.2-

9.9 ppm

0.1 ppm

± 2.5% of

reading

ppm***

*NaCl - Sodium Chloride ** ± .2 in the presence of RF fields ≥ 3 V/m and > 300 MHz
***Given water is sanitized by chlorine only within 5<pH<9

4

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

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, MIN/SALT Keys ..............7

3. TDS, pH and ORP Keys..............8

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

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

IV. AFTER USING the Po o l Pr o ..........................9

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

B. Maintenance of the pH/ORP Sensor........... 9

V. SPECIFIC RECOMMENDED MEASURING

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

A. Measuring Conductivity, MIN/SALT & TDS ...... 9

B. Measuring pH ...........................10

C. Measuring ORP (mV to ppm, page 44)........10

VI. SOLUTION SELECTION............................ 11

A. Why Solution Selection is Available .......... 11

B. The 3 Solution Types ..................... 11

C. Calibration of Each Solution Type ............ 11

D. Procedure to Select a Solution .............. 11

VII. CALIBRATION....................................12

A. Calibration Intervals ......................12

B. Rules for Calibration of the Po o l Pr o .......... 12

1. Calibration Steps ..................12

2. Calibration Limits ..................13

C. Calibration Procedures .................... 13

1. Conductivity, MIN/SALT &TDS

Calibration....................13

2. Reloading Factory Calibration ........ 14

3. pH Calibration ....................14

4. ORP Calibration ...................17

5. Temperature Calibration ............. 17

5

VIII. CALIBRATION INTERVALS .........................17

A. Suggested Intervals ......................17

B. Calibration Tracking Records ...............17

C. Conductivity, MIN/SALT, TDS Practices .......18

D. pH and ORP Practices ....................18

IX. MEMORY........................................18

A. Memory Storage .........................19

B. Memory Recall ..........................19

C. Clearing a Record/Memory Clear ............ 19

X. TIME and DATE...................................20

A. Setting TIME ............................20

B. Setting DATE............................21

C. US & International Format..................22

XI. TEMPERATURE FORMAT “Centigrade & Fahrenheit” ..... 22

XII. TOTAL RETURN to FACTORY SETTINGS..............23

XIII. CELL CHECK ....................................23

XIV. AUTO OFF ......................................24

XV. bluDock™ WIRELESS DATA TRANSFER INSTRUCTIONS ...25

A. Software Installation ......................25

B. Hardware Setup .........................25

C. Memory Stack Download ..................26

XVI. CARE and MAINTENANCE .........................27

A. Temperature Extremes ....................27

B. Battery Replacement......................27

C. pH/ORP Sensor Replacement ..............27

D. Cleaning Sensors ........................28

XVII. TROUBLESHOOTING .............................30

XVIII. ACCESSORIES...................................32

A. Conductivity/TDS Standard Solutions ......... 32

B. pH Buffer Solutions .......................32

C. pH Sensor Storage Solution ................ 32

D. Soft Protective Carry Cases ................32

E. Hard Protective Carry Cases ...............33

F. Replacement pH/ORP Sensor ..............33

G. bluDock™ Wireless Data Transfer

Accessory Package ...................33

XIX. TEMPERATURE COMPENSATION (Tempco)

of Aqueous Solutions ........................33

A. Standardized to 25°C ..................... 33

B. Tempco Variation.........................33

C. An Example.............................34

D. A Chart of Comparative Error ...............35

E. Other Solutions ..........................35

6

XX. CONDUCTIVITY CONVERSION to

TOTAL DISSOLVED SOLIDS (TDS) ............36

A. How it’s Done ...........................36

B. Solution Characteristics ...................36

C. When does it make a lot of difference?........36

XXI. TEMPERATURE COMPENSATION (Tempco)

and TDS DERIVATION ....................... 37

XXII. pH and ORP .....................................38

A. pH ....................................38

B. ORP/Oxidation-Reduction Potential/REDOX ...40

XXIII. SOFTWARE VERSION .............................41

XXIV. GLOSSARY ...................................... 42

XXV. ADDENDUM: NEW ORP PPM

FREE CHLORINE FEATURE..................43

XXVI. ADDENDUM: NEW LSI & HARDNESS

CALCULATOR .............................45

A. LSI Calculator Mode ......................46

B. LSI Calculator “User” Mode.................47

C. Hardness Unit Preference Selection.......... 49

7

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 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 does no harm and restarts the 15

second auto “off” timer.

• Note the value displayed or press the MS key to store the
reading (ref. Memory Storage, pg.19). It’s that simple!

B. Characteristics of the Keys

• Though your Po o l Pr o 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.

• Rarely is it necessary to press and

hold

a key (as in Procedure

to Select a Solution, pg. 11; or Cond. or TDS Calibration, pg.12).

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

1. Measurement Keys in General
Any of the 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. 13).

2. COND, MIN/SALT 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),

refer to Why Solution Selection is Available, pg. 11 and
Procedure to Select a Solution, pg. 11.
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.

8

b. MIN/SALT key
A press of displays Total Dissolved Solids with units (PPM &
PPT).

on the right. On the left is shown solution type selected (NaCl) for
mineral/salt (ref. Solution Selection, pg. 11). An overrange condition will
show only [- - - -].
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. 11).

3. pH and ORP Keys
Measurements are made on solution held in the pH/ORP sensor well

(ref. pH and ORP, pg. 38). The protective cap is removed and the sensor
well is lled and rinsed with the sample enough times to completely

replace the pH Sensor Storage Solution.

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

Sensor Storage Solution, and the protective cap reinstalled securely

(ref. Maintenance of the pH/ORP Sensor, pg. 9 and Cleaning Sensors,

2. pH/ORP, pg. 28).

a. pH Key
A press of displays pH readings. No units are displayed on the
right.
b. ORP Key
A press of displays Oxidation-Reduction Potential/REDOX

reading in millivolts, “mV” is displayed.

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. 13).

If is held down for about 3 seconds, CAL mode is not entered, but

“SEL” appears to allow Solution Selection (ref. pg. 11) with the Up or
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. 19).

MIN

SALT

9

5. UP or DOWN Keys

While measuring in any parameter, the or keys activate

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. 19).

IV. AFTER USING the Po o l Pr o
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. Even if a

very active chemical discolors the electrodes, this does not affect the

accuracy; leave it alone. (ref. Cleaning Sensors, pg. 28)

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

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

Storage Solution. If unavailable, you can use an almost saturated KCl
solution, pH 4 buffer or at least a strong table salt solution. NEVER USE
DISTILLED WATER. (ref. pH and ORP Practices, pg. 18).

V. SPECIFIC RECOMMENDED MEASURING
PROCEDURES

If the proper solution is not selected (KCl, NaCl, 442), see Solution

Selection, pg. 11.

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.

10

B. Measuring pH

1. Remove protective cap by squeezing its sides and pulling up.

2. Rinse sensor well 3 times with sample to be measured. Shake

out each sample to remove any residual liquid.

3. Rell both sensor wells 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, 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. 28).

Do not allow pH/ORP sensor to dry out.

D. Measuring ORP

1. Remove protective cap by squeezing its sides and pulling up.

2. Rinse sensor well 3 times with sample to be measured. Shake

out each sample to remove any residual liquid.

3. Rell both sensor wells with sample.

4. Press .

5. Take reading.

NOTE: When ppm free chlorine units are selected (ref. free chlorine unit

selection, pg. 43), annunciators alert you when the concentration is outside
the specied measurement range. “Or” (over range) will display when the
concentration is over the range limit (> 9.9 ppm). “Ur” (under range) will
display when the concentration is below the range limit (< 0.2 ppm).

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, 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. 28).

Do not allow pH/ORP sensor to dry out.

NOTE: FOR INFORMATION REGARDING THE ORP mV TO
ppm CONVERSION FEATURE, PLEASE SEE SECTION XXVI.
ADDENDUM, PG. 43.

11

VI. SOLUTION SELECTION

A. Why Solution Selection is Available
Conductivity, MIN/SALT, and TDS require temperature correction to

25°C values (ref. Standardized to 25°C, pg. 33). Selection determines

the temperature correction of conductivity and calculation of TDS from

compensated conductivity (ref. Cond. Conversion to TDS, pg. 36).

B. The 3 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 Mineral/

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

industry practice for standardization. This is the setup as shipped from

the factory (ref. Solution Characteristics, pg. 36).

C. Calibration of Each Solution Type

There is a separate calibration for each of the 3 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. 13) is performed separately for each type of solution one wishes to
measure (ref. Conductivity/TDS Standard Solutions, pg. 32).

D. Procedure to Select a Solution

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

already the type desired. If not:

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 3 solution types are shown simultaneously.)

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

(ref. Solution Characteristics, pg. 36). The selected solution
type will be displayed: KCl, NaCl, or 442.

4. Press to accept new solution type.

Figure 1

KCl

442

NaCl

MIN

SALT

12

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

VII. CALIBRATION
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. 17).

B. Rules for Calibration of the Po o l Pr o

1. Calibration Steps
a. Starting Calibration

Calibration is begun by pressing while measuring Conductivity,

MIN/SALT, TDS or pH. Measuring continues, but the CAL icon is on,
indicating calibration is now changeable.

The reading is changed with the and to match the

known value. The calibration for each of the 3 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.

KCl, NaCl or 442

Cond Gain only

MIN/SALT

TDS Gain only

pH 7, acid and/or base

ORP Zero set with pH 7 automatically

Gain only

13

The 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, just 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

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

Chart, pg. 30).

C. Calibration Procedures

1. Conductivity, MIN/SALT or TDS Calibration

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

NaCl, or 442) (ref. Cond/TDS Standard Solutions, pg. 32).

b. Rell conductivity cell with same standard. NACL-7500 shown.

c. Press , or , then

press , “CAL” icon will

appear on the display

(see Figure 5).

d. Press or to or

to step the displayed value toward the

Figure 5

°C

NaCl

COND

CAL

µS

7582

23.8

MIN

SALT