Myron L 6P User Manual
Ultrameter
™
Operation
Manual
Model 6P
10 - 02 (WEB) EG
MYRON L
COMPANY
7-11-00
Reference
Junction under
Glass pH Bulb
MS
MR
pH
6P
ORP
COND
RES TDS
These 5 Measurement keys will:
• Turn instrument on.
• Measure parameter.
• Exit any function.
(Built-in
Electrodes)
Preprogrammed
variable conductivity/
TDS ratios
Parameters (5)
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)
PPM
PPT
mV
µS
mS
K
M
BUFFER
°C
RATIO
% /
KCl
442
NaCl
User
ORP RES TDSpHCOND
LOBATT CAL MEMORY
For detailed explanations see Table of Contents
Instrument Illustration
Units of Measurement
Megohms - cm
Ω
Kilohms - cm
mS - millisiemens/cm
(millimhos/cm)
µS - microsiemens/cm
(micromhos/cm)
PPM - parts per million
PPT - parts per thousand
Parameter
Resistivity
Resistivity
Conductivity
Conductivity
TDS
TDS
Temperature
Sensor
MMYYRROONN LL
CCOOMMPPAANNYY
MCLR
CAL
1
ULTRAMETER
TM
FEATURES and SPECIFICATIONS
A. Features:
• Superior resolution 4 digit LCD displays full 9999 µS/ppm.
• Accuracy of ±1% of reading (not merely full scale).
• All electrodes are internal for maximum protection.
• Latest 4 electrode cell technology.
• Waterproof to 3 feet/1 meter.
• Autoranging conductivity/TDS/resistivity.
• Prompts for easy pH calibration.
• Memory saves 20 readings.
• Factory calibrations stored in microprocessor.
• 3 conductivity/TDS solution conversions preprogrammed into
microprocessor.
• USER feature allows:
Programming your own cond/TDS conversion factor.
Programming your own temperature compensation factor.
Disabling temperature compensation.
B. General Specifications
Display 4 Digit LCD
Dimensions (LxWxH) 7.7x2.7x2.5 in.
196x68x64 mm
Weight 13.5oz./383g
Case Material VALOX*
Cond/Res/TDS Cell Material VALOX*
Cond/Res/TDS Cell Capacity 0.2 oz./5 ml
pH/ORP Sensor Well Capacity 0.04 oz./1.2 ml
Power 9V Alkaline Battery
Battery Life >100 Hours/5000 Readings
Operating/Storage Temperature 32-132°F/0-55°C
Protection Ratings IP67/NEMA 6 (waterproof to
3 feet/1 meter)
* ™ GE Corp.
Additional information available on our web site at:
www.myronl.com
2
C. Specification Chart
6P
Ranges 0-14 pH ±999 mV
Resolution
Accuracy ±.01 pH ±1 mV
Auto
Temperature
Compensation
Adjustable
Temperature
Compensation
Cond/TDS
Ratios
Preprogrammed
Adjustable
Cond/TDS Ratio
Factor
* up to 100mS/ppt; 100 - 200mS/ppt: ± 1 - 2% typ.
0-71°C
32 - 160 °F
ConductivitypH ORP TDS Temperature
0-9999 µS
10-200 mS
in 5 autoranges
0.01 (<100 µS)
0.1 (<1000 µS)
1.0 (>1000 µS)
±1% of reading* ±1% of reading* ±1% of reading**
0-71°C
32 - 160 °F
0 - 9.99%/°C
0-9999 ppm
10-200 ppt
in 5 autoranges
0.01 (<100 ppm)
0.1 (<1000 ppm)
1.0 (>1000 ppm)
0-71°C
32 - 160 °F
0 - 9.99%/°C 0 - 9.99%/°C
KCl, NaCl, 442™
0.20 - 7.99
Resistivity
10K - 30M ohmsΩ
0.01 (<100K ohm )
0.1 (<1000K ohm )
1.0 (>1MΩohm )
0-71°C
32 - 160 °F
**10K ohmsΩ - 10M ohmsΩ
32 - 160 °F
0.1 °C/F±.01 pH ±1 mV
±0.1 °C
0-71°C
D. Warranty/Service
All Myron L Ultrameters have a 2 year warranty except for pH sensors
which have a 6-month limited warranty. If an instrument fails to operate
properly, see the Troublshooting Chart, pg. 27. 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
USA
760-438-2021
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 only. The Myron L Company assumes no
other responsibility or liability.
E. Ultrameter Models
ULTRAMETER MODELS 3P 4P 6P
PARAMETERS pH/ORP/Temp. Conductivity/TDS Conductivity/TDS/pH
Resistivity/Temp. Resistivity/ORP/Temp.
3
TABLE OF CONTENTS
Instrument Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
FEA TURES and SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
A. Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
B. General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
C. Specification Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
D. Warranty/Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
E. Ultrameter Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
II. RULES of OPERA TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
A. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
B. Characteristics of the Keys . . . . . . . . . . . . . . . . . . . . . . 7
C. Operation of the Keys . . . . . . . . . . . . . . . . . . . . . . . . . . 8
1. Measurement Keys in General . . . . . . . . . . . . 8
2. COND, RES and TDS keys . . . . . . . . . . . . . . .8
3. pH and ORP keys . . . . . . . . . . . . . . . . . . . . . . . 8
4. CAL/MCLR key . . . . . . . . . . . . . . . . . . . . . . . . . 9
5. UP or DOWN keys . . . . . . . . . . . . . . . . . . . . . . .9
VI. CALIBRA TION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
A. Calibration Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
B. Rules for Calibration in the Ultrameter . . . . . . . . . . . . 14
1. Calibration Steps . . . . . . . . . . . . . . . . . . . . . . .14
2. Calibration Limits . . . . . . . . . . . . . . . . . . . . . . .15
C. Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . 15
1. Conductivity or TDS Calibration . . . . . . . . . .15
2. User Calibration Conductivity/TDS . . . . . . . .16
3. Resistivity Calibration . . . . . . . . . . . . . . . . . . . 16
4. Reloading Factory Calibration . . . . . . . . . . . .17
5. pH Calibration . . . . . . . . . . . . . . . . . . . . . . . . . 17
6. ORP Calibration . . . . . . . . . . . . . . . . . . . . . . . .19
7. Temperature Calibration . . . . . . . . . . . . . . . . 20
VII. MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
A. Memory Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
B. Memory Recall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
C. Clearing a Record/Memory Clear . . . . . . . . . . . . . . . . 20
VIII. CHANGING from CENTIGRADE to FAHRENHEIT . . . . . . . . . . . .21
IX. TOTAL RETURN to FACTOR Y SETTINGS . . . . . . . . . . . . . . . . . 22
III. AFTER USING the ULTRAMETER . . . . . . . . . . . . . . . . . . . . . . . . . .9
A. Maintenance of the Conductivity Cell . . . . . . . . . . . . . 9
B. Maintenance of the pH/ORP Sensor . . . . . . . . . . . . . .9
IV. SPECIFIC RECOMMENDED MEASURING PROCEDURES . . .10
A. Measuring Conductivity/Total Dissolved Solids . . . .10
B. Measuring Resistivity . . . . . . . . . . . . . . . . . . . . . . . . . . 10
C. Measuring pH. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
D. Measuring ORP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
V. SOLUTION SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
A. Why Solution Selection is A vailable . . . . . . . . . . . . . .11
B. The 4 Solution Types . . . . . . . . . . . . . . . . . . . . . . . . . .1 1
C. Calibration of Each Solution T ype . . . . . . . . . . . . . . . 12
D. Procedure to Select a Solution . . . . . . . . . . . . . . . . . 12
E. Application of USER Solution Type . . . . . . . . . . . . . .12
1. User Programmable Tempco . . . . . . . . . . . . 12
2. Disabling Temperature Compensation . . . . 13
3. User Programmable Conductivity to TDS
Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4
X. CALIBRA TION INTER VALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
A. Suggested Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . .23
B. Calibration Tracking Records . . . . . . . . . . . . . . . . . . . 23
C. Conductivity , RES, TDS Practices . . . . . . . . . . . . . . .23
D. pH and ORP Practices . . . . . . . . . . . . . . . . . . . . . . . . . 24
XI. CARE and MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
A. Temperature Extremes . . . . . . . . . . . . . . . . . . . . . . . . 24
B. Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 24
C. pH/ORP Sensor Replacement. . . . . . . . . . . . . . . . . . 24
D. Cleaning Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
XII. TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
XIII. ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
A. Conductivity/TDS Standard Solutions . . . . . . . . . . . 28
B. pH Buffer Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
C. pH Sensor Storage Solution . . . . . . . . . . . . . . . . . . . 28
D. Soft Protective Case . . . . . . . . . . . . . . . . . . . . . . . . . . 28
E. Replacement pH/ORP Sensor . . . . . . . . . . . . . . . . . .29
F. Data Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
5
XIV . TEMPERATURE COMPENSA TION (Tempco)
of Aqueous Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
A. Standardized to 25°C . . . . . . . . . . . . . . . . . . . . . . . . . .29
B. Tempco Variation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
C. An Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
D. A Chart of Comparative Error . . . . . . . . . . . . . . . . . . . .31
E. Other Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
XV. CONDUCTIVITY CONVERSION to
TOTAL DISSOLVED SOLIDS (TDS). . . . . . . . . . . . . . . . 32
A. How it’s Done . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
B. Solution Characteristics . . . . . . . . . . . . . . . . . . . . . . . .32
C. When does it make a lot of difference? . . . . . . . . . . . 33
XVI. TEMPERATURE COMPENSATION (Tempco)
and TDS DERIVA TION . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. Conductivity Characteristics . . . . . . . . . . . . . . . . . . . . 33
B. Finding the Tempco of an Unknown . . . . . . . . . . . . . 34
C. Finding the TDS Ratio of an Unknown . . . . . . . . . . . 34
XVII. pH and ORP MEASURING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
A. pH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
B. ORP/Oxidation-Reduction Potential/REDOX . . . . . .37
XVIII. GLOSSARY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Addendum
I. HIGH RESISTIVITY MEASUREMENTS . . . . . . . . . . . . . . . . . . . . . .1
Offset Zero Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Cell Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
II. USER MODE GAIN CALIBRA TION . . . . . . . . . . . . . . . . . . . . . . . . . 3
A. Calibration of Ultrameter for Use in User Mode . . . . . 3
B. Setting User mode Calibration “ Link” . . . . . . . . . . . . . 3
C. Canceling User Mode Calibration “Link” . . . . . . . . . . . 4
* CHECKING YOUR INSTRUMENTS SOFTWARE VERSION . . . . . . . . . 5
6
I. INTRODUCTION
Thank you for selecting the Ultrameter™ Model 6P, one of the Myron L
Company’s latest in a new line of instruments utilizing advanced
microprocessor-based circuitry. This circuitry makes it extremely accurate
and very easy to use (see pages 2 & 3 for Features and Specifications on
this and other models). For your convenience, on the bottom side of your
Ultrameter is a brief set of instructions, and a 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. 29). On
the left of the Ultrameter’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 can 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. 32).
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 reflect present industry practice for
standardization. This is how your instrument, as shipped from the factory,
is set to operate.
II. RULES of OPERATION
A. Operation
Using the instrument is simple:
• Individual or multiple parameter readings may be obtained by
filling individual sensors or entire cell cup area.
• Rinse the conductivity cell or pH/ORP sensor well with test
solution 3 times and refill.
• Press the desired measurement key to start measurement.
Pressing the key again does no harm and restarts the 15 second
“off” timer.
• Note the value displayed or press the MS key to store
(ref. Memory Storage, pg. 20). It’s that simple!
B. Characteristics of the Keys
• Though your Ultrameter 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).
• Rarely will a key be required to be held down (as in Procedure to
Select a Solution, pg. 12; or Cond. or TDS Calibration, pg. 15).
7
C. Operation of the Keys (See Instrument Illustration on page 1)
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 abandon a change (ref. Leaving Calibration, pg. 15).
a. pH key
A press of displays pH readings. No units are displayed.
pH
b. ORP key
A press of displays Oxidation-Reduction Potential/REDOX reading
ORP
in millivolts.
2. COND, RES and TDS keys
These 3 keys are used with solution in the Conductivity Cell.
Precautions:
• While filling 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. 11 and
Procedure to Select a Solution, pg. 12.
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
COND
shown the solution type selected for conductivity. An overrange
condition will show only [- - - -] (ref. Solution Selection, pg. 11).
b. RES Key
A press of displays resistivity with units on the right. On the left
RES
is shown solution type selected for resistivity (ref. Solution Selection, pg.
11). 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.
TDS
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 Measuring, pg. 34). The protective cap is removed and the
sensor well is filled and rinsed with sample enough times to completely
replace the storage solution.
After use, the pH/ORP sensor well must be refilled with Myron L Storage
Solution, and the protective cap reinstalled securely (ref. Maintenance of
the pH/ORP Sensor, pg. 9 and Cleaning pH/ORP Sensors, pg. 25).
8
4. CAL/MCLR key
A press of allows you to enter the calibration mode while
CAL
MCLR
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. 15).
CAL
If is held down for about 3 seconds, CAL mode is not entered, but
MCLR
“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. 20).
5. UP or DOWN keys
While measuring in any parameter, the or keys activate the
MS
MR
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 move the display up and down the stack
of records (ref. Memory Recall, pg. 20).
III. AFTER USING the ULTRAMETER
A. Maintenance of the Conductivity Cell
Rinse out the cell cup with clean water. Do not scrub the cell. For oily
films, 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. 25).
B. Maintenance of the pH/ORP Sensor
The sensor well must be kept wet with a solution. Before replacing the
rubber cap, rinse and fill the sensor well with (in order of preference):
Myron L Storage Solution, an almost saturated KCl solution, pH 4 buffer
9
or at least a strong table salt solution. Not distilled water. (ref. pH and ORP
Practices, pg. 24)
2. Rinse sensor well 3 times with sample to be measured. Shake
out each sample to remove any residual liquid.
IV. SPECIFIC RECOMMENDED MEASURING
PROCEDURES
If the proper solution is not selected (KCl, NaCl, 442 or USER), 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 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. Refill cell cup with sample.
3. Press or .
COND
TDS
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 flowing sample is recommended.
1. Make sure pH protective cap is secure to avoid contamination.
3. Refill sensor well with sample.
4. Press .
pH
5. Take reading.
6. IMPORTANT : After use, fill pH/ORP sensor well with Myron L
Storage Solution, a strong KCl solution or pH 4 buffer, and
replace protective cap. Do not allow pH/ORP sensor to dry out.
NOTE: If none of the above are available, use a saturated solution of
table salt and tap water (ref. Cleaning pH/ORP Sensors, pg. 25).
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. Refill sensor well with sample.
4. Press .
ORP
5. Take reading.
6. IMPORTANT : After use, fill pH/ORP sensor well with Myron L
Storage Solution, a strong KCl solution or pH 4 buffer and
replace protective cap. Do not allow pH/ORP sensor to dry out.
2. Hold instrument at 30° angle (cup sloping downward).
3. Let sample flow continuously into conductivity cell with no
aeration.
4. Press key; use best reading.
RES
NOTE: If reading is lower than 10 kilohms display will be dashes: [ - - - - ].
Use Conductivity.
C. Measuring pH
1. Remove protective cap by squeezing its sides and pulling up.
10
NOTE: If none of the above are available, use a saturated solution of
table salt and tap water (ref. Cleaning pH/ORP Sensors, pg. 25).
V. 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. 29). Selection determines the
temperature correction of conductivity and calculation of TDS from
compensated conductivity (ref. Cond. Conversion to TDS, pg. 32).
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
11
conversion. Generally, using KCl for conductivity, NaCl for resistivity, and
442 (Natural Water characteristic) for TDS will reflect present industry
practice for standardization. This is the setup as shipped from the factory
(ref. Solution Characteristics, pg. 32).
The USER selection allows a custom value to be entered for the
temperature compensation of conductivity and also the conversion ratio if
measuring TDS.
Temperature Compensation, pg. 29). This feature does not apply to pH
or ORP.
a. As in Procedure to Select a Solution, pg. 12, select “USER”
mode.
b. With “USER” mode now selected, press . You may now
CAL
MCLR
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. 15) is performed separately for each type of solution one wishes to
measure (ref. Conductivity/TDS Standard Solutions, pg. 28).
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:
1. Press , or to select the parameter on which
COND
RES
TDS
you wish to change the
solution type.
2. Press and hold key
CAL
MCLR
KCl
NaCl
442
User
about 3 seconds to make
“SEL” appear (see Figure 1).
(For demonstration purposes,
Figure 1
all 4 solution types are shown simultaneously.)
3. Use or key to obtain type of solution desired (ref.
MS
MR
Solution Characteristics, pg. 32). The selected solution type will
be displayed: KCl, NaCl, 442 or User.
4. Press to accept new solution type.
CAL
MCLR
E. Application of USER Solution Type
1. User Programmable Tempco
This feature allows you to change your Ultrameter’s temperature
compensating factor to another factor between 0-9.99%/°C (ref.
12
adjust a temperature compensation from .00%/°C to 9.99%/°C,
by pressing or .
MS
MR
See example in Figure 2.
c. Press twice to skip
CAL
MCLR
calibration adjustment and
accept the new tempco (3
User
°C% /
COND
Figure 2
times if in TDS mode). You are now ready to measure samples
with your new temperature compensation factor.
2. Disabling Temperature Compensation
a. As in Procedure to Select a Solution, pg. 12, select “USER”
mode.
b. With “USER” selected, press . If the display does not
show .00%/°C, hold long enough to bring the tempco to
MR
CAL
MCLR
.00%/°C (see Fig. 3).
c. Press twice (3 times
if in TDS mode). Temperature
compensation is now disabled
(=0) for measurements in
USER mode.
CAL
MCLR
User
°C% /
COND
Figure 3
3. User Programmable Conductivity to TDS Ratio
This feature allows you to select a custom conductivity to TDS conversion
ratio for USER mode measurements.
For example: The conversion ratio range is 0.20-7.99 (ie., if conductivity
is 100 µS and TDS is 75 ppm, you would adjust to 0.75) (ref. Conductivity
Conversion to TDS, pg. 32).
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