Ultrameter  Operation Manual
Ultrameter™
Operation
Manual
Model 4P
MYRON L
COMPANY
10 - 02 (WEB) EG
Instrument Illustration
Conductivity Cell
(Built-in
Electrodes)
Temperature
Sensor
Preprogrammed
variable conductivity/
TDS ratios
USER mode
for programming
special temperature
compensation
factor and
conductivity/TDS
ratio
LOBATT CAL MEMORY
KCl
NaCl
442
User
% / °C
RATIO
M
K
mS
µS
PPM
PPT
BUFFER
COND
RES
TDS
COND
RES
TDS
4P
CAL
Units of Measurement
Ω 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
Parameters (3)
Displayed here:
• Temperature
readout
• USER temperature
compensation or
conductivity/TDS
ratio
• Memory Storage/
Recall
MCLR
This key for:
• Calibration
• Memory Clear
• Solution selection
• Confirmation
These 3 Measurement keys will:
• Turn instrument on
• Measure parameter
• Exit any function
Up key/Memory Store
MS
MR
Down key/Memory Recall
MYRON L
COMPANY
ULTRAMETER
TM
Wrist/neck strap slot
(user supplied)
For detailed explanations see Table of Contents
7-11-00
1
FEATURES and SPECIFICATIONS
C. Specification Chart
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.
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.
•
•
•
•
•
•
•
•
•
4P
Ranges
Resolution
Conductivity
TDS
0-9999 µS
10-200 mS
in 5 autoranges
0-9999 ppm
10-200 ppt
in 5 autoranges
Weight
Case Material
Cond/Res/TDS Cell Material
Cond/Res/TDS Cell Capacity
Power
Battery Life
Operating/Storage Temperature
Protection Ratings
4 Digit LCD
7.7x2.7x2.5 in.
196x68x64 mm
12oz./341g
VALOX*
VALOX*
0.2 oz./5 ml
9V Alkaline Battery
>100 Hours/5000 Readings
32-132°F/0-55°C
IP67/NEMA 6 (waterproof to
3 feet/1 meter)
* ™ GE Corp.
Additional information available on our web site at:
www.myronl.com
0.01 (<100K o h m s Ω
)
)
0.1 (<1000K o h m s Ω
1.0 (>1 MΩ)
0.01 (<100 ppm)
0.1 (<1000 ppm)
1.0 (>1000 ppm)
Accuracy
±1 % of reading*
±1 % of reading*
±1 % of reading**
Auto
Temperature
Compensation
0-71°C
32 - 160°F
0-71°C
32 - 160°F
0-71°C
32 - 160°F
Adjustable
Temperature
Compensation
Cond/TDS
Ratios
Preprogrammed
Adjustable
Cond/TDS Ratio
Factor
0 - 9.99%/°C
0 - 9.99%/°C
0 - 9.99%/°C
0.1 °C/F
±0.1 °C
KCl, NaCl, 442™
0.20 - 7.99
Ω
Ω
**10K ohms - 10M ohms
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. 21. The battery and pH/ORP
sensor are user replaceable. For other service, return the instrument
prepaid to the Myron L Company.
MYRON L COMPANY
6115 Corte Del Cedro
Carlsbad, CA 92009
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
other responsibility or liability.
E.
Ultrameter Models
ULTRAMETER MODELS
PARAMETERS
2
0-71°C
32 - 160 °F
10K - 30M ohms
Ω
Ω
0.01 (<100 µS)
0.1 (<1000 µS)
1.0 (>1000 µS)
* up to 100mS/ppt; 100 - 200mS/ppt: ± 1 - 2% typ.
B. General Specifications
Display
Dimensions (LxWxH)
Temperature
Resistivity
3P
4P
6P
pH/ORP/Temp.
Conductivity/TDS
Resistivity/Temp.
Conductivity/TDS/pH
Resistivity/ORP/Temp.
3
TABLE OF CONTENTS
Instrument Illustration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
FEATURES 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 OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. CAL/MCLR key . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. UP or DOWN keys . . . . . . . . . . . . . . . . . . . . . . .9
III.
AFTER USING the ULTRAMETER
Maintenance of the Conductivity Cell . . . . . . . . . . . . . . . 9
IV.
SPECIFIC RECOMMENDED MEASURING PROCEDURES . . . .9
A. Measuring Conductivity/Total Dissolved Solids . . . . .9
B. Measuring Resistivity . . . . . . . . . . . . . . . . . . . . . . . . . . 10
V.
SOLUTION SELECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
A. Why Solution Selection is Available. . . . . . . . . . . . . . 10
B. The 4 Solution Types. . . . . . . . . . . . . . . . . . . . . . . . . . 10
C. Calibration of Each Solution Type . . . . . . . . . . . . . . .10
D. Procedure to Select a Solution . . . . . . . . . . . . . . . . . 10
E. Application of USER Solution Type . . . . . . . . . . . . . .11
1. User Programmable Tempco . . . . . . . . . . . . 11
2. Disabling Temperature Compensation . . . . 12
3. User Programmable Conductivity to TDS
Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
VI.
4
CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
A. Calibration Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
VII.
B. Rules for Calibration in the Ultrameter . . . . . . . . . . . . 13
1. Calibration Steps . . . . . . . . . . . . . . . . . . . . . . .13
2. Calibration Limits . . . . . . . . . . . . . . . . . . . . . . .14
C. Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . 14
1. Conductivity or TDS Calibration . . . . . . . . . .14
2. User Calibration Conductivity/TDS . . . . . . . .15
3. Resistivity Calibration . . . . . . . . . . . . . . . . . . . 15
4. Reloading Factory Calibration . . . . . . . . . . . .15
5. Temperature Calibration . . . . . . . . . . . . . . . . 16
MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
A. Memory Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
B. Memory Recall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
C. Clearing a Record/Memory Clear . . . . . . . . . . . . . . . . 16
VIII.
CHANGING from CENTIGRADE to FAHRENHEIT . . . . . . . . . . . .17
IX.
TOTAL RETURN to FACTORY SETTINGS . . . . . . . . . . . . . . . . . 18
X.
CALIBRATION INTERVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
A. Suggested Intervals . . . . . . . . . . . . . . . . . . . . . . . . . . .19
B. Calibration Tracking Records . . . . . . . . . . . . . . . . . . . 19
C. Conductivity, RES, TDS Practices . . . . . . . . . . . . . . .19
XI.
CARE and MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
A. Temperature Extremes . . . . . . . . . . . . . . . . . . . . . . . . 20
B. Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . 20
C. Cleaning Cell Cup . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
XII.
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
XIII.
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
A. Conductivity/TDS Standard Solutions . . . . . . . . . . . 22
B. Soft Protective Case . . . . . . . . . . . . . . . . . . . . . . . . . . 22
C. Data Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
D. pH Buffer Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
E. pH Sensor Storage Solution . . . . . . . . . . . . . . . . . . . 23
XIV.
TEMPERATURE COMPENSATION (Tempco)
of Aqueous Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
A. Standardized to 25°C . . . . . . . . . . . . . . . . . . . . . . . . . .23
B. Tempco Variation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
C. An Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
D. A Chart of Comparative Error . . . . . . . . . . . . . . . . . . . .25
E. Other Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
5
XV.
CONDUCTIVITY CONVERSION to
TOTAL DISSOLVED SOLIDS (TDS) . . . . . . . . . . . . . . .26
A. How it’s Done . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
B. Solution Characteristics . . . . . . . . . . . . . . . . . . . . . . . .26
C. When does it make a lot of difference? . . . . . . . . . . . 27
XVI.
TEMPERATURE COMPENSATION (Tempco)
and TDS DERIVATION . . . . . . . . . . . . . . . . . . . . . . . . . . .27
A. Conductivity Characteristics . . . . . . . . . . . . . . . . . . . . 27
B. Finding the Tempco of an Unknown . . . . . . . . . . . . . 28
C. Finding the TDS Ratio of an Unknown . . . . . . . . . . . 28
XVII.
GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Addendum
I.
HIGH RESISTIVITY MEASUREMENTS . . . . . . . . . . . . . . . . . . . . . .1
Offset Zero Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Cell Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
II.
USER MODE GAIN CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . 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
I.
INTRODUCTION
Thank you for selecting the Ultrameter™ Model 4P, 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, your Ultrameter has a brief
set of instructions on its bottom, and a pocket sized card with abbreviated
instructions is included with the instrument.
Special note ...... Conductivity, Resistivity, and TDS require mathematical
correction to 25°C values (ref. Temperature Compensation, pg. 23). 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. 26).
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:
•
Rinse the conductivity cell 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. 16). It’s that simple!
•
•
•
•
6
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. 10 or Conductivity or TDS Calibration, pg.
14).
7
C. Operation of the Keys (See Instrument Illustration on page 1)
1. Measurement Keys in General
Any of the 3 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. 14).
If
CAL
MCLR
is held down for about 3 seconds, CAL mode is not entered, but
“S E L ” appears to allow Solution Selection (ref. pg. 10) 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. 16).
4. UP or DOWN keys
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. 10 and
Procedure to Select a Solution, pg. 10.
a. COND Key
Solution to be tested is introduced into the conductivity cell and a press
of
COND
displays conductivity with units on the right. On the left is
shown the solution type selected for conductivity. An overrange
condition will show only [- - - -] (ref. Solution Selection, pg. 10).
b. RES Key
A press of R E S displays resistivity with units on the right. On the left
is shown solution type selected for resistivity (ref. Solution Selection, pg.
10). 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 TDS 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. 10).
While measuring in any parameter, the
CAL
MCLR
allows you to enter the calibration mode while
measuring conductivity or TDS. 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. 14).
8
or MR
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 move the display up and down the stack
of records (ref. Memory Recall, pg. 16).
III.
AFTER USING the ULTRAMETER
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 Conductivity/TDS/Resistivity Cell
Cup, pg. 20).
IV.
THE SPECIFIC RECOMMENDED MEASURING
PROCEDURES
If the proper solution is not selected (KCl, NaCl, 442 or USER), see
Solution Selection, Pg. 10.
N O T E : After sampling high concentration solutions or temperature
extremes, more rinsing may be required.
1.
3. CAL/MCLR key
A press of
MS
A. Measuring Conductivity/Total Dissolved Solids (TDS)
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
4.
Take reading. A display of [- - - -] indicates an overrange
condition.
COND
or TDS .
9
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.
1.
Hold instrument at 30° angle (cup sloping downward).
2.
2.
Let sample flow continuously into conductivity cell with no
aeration.
3.
Press R E S
NOTE: If reading is lower than 10 kilohms, display will be dashes: [ - - - - ].
Use Conductivity.
Press and hold
Use
MS
or MR
4.
Press CAL
MCLR
N O T E : Check display to see if solution displayed (KCl, NaCl, 442 or
USER) is already the type desired. If not:
10
key
key to obtain type of solution desired (ref.
to accept new solution type.
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.
Temperature Compensation, pg. 23).
a.
As in Procedure to Select a Solution, pg. 10, select “USER”
mode.
b.
With “USER” mode now selected, press
CAL
MCLR
. You may now
adjust a temperature compensation from .00%/°C to 9.99%/°C,
by pressing
D. Procedure to Select a Solution
CAL
MCLR
KCl
NaCl
442
User
Solution Characteristics, pg. 26). The selected solution type will
be displayed: KCl, NaCl, 442 or User.
V.
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. 14) is performed separately for each type of solution one wishes to
measure (ref. Conductivity/TDS Standard Solutions, pg. 22).
, R E S or TDS to select the parameter on which
about 3 seconds to make
“S E L ” appear (see Figure 1).
Figure 1
(For demonstration purposes,
all 4 solution types are shown simultaneously.)
3.
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 reflect present industry
practice for standardization. This is the setup as shipped from the factory
(ref. Solution Characteristics, pg. 26).
The USER selection allows a custom value to be entered for the
temperature compensation of conductivity and also the conversion ratio if
measuring TDS.
COND
you wish to change the
solution type.
key; use best reading.
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. 23). Selection determines the
temperature correction of conductivity and calculation of TDS from
compensated conductivity (ref. Cond. Conversion to TDS, pg. 26).
Press
MS
or MR .
See example in Figure 2.
c.
Press
CAL
MCLR
User
twice to skip
% / °C
COND
calibration adjustment and
Figure 2
accept the new tempco (3
times if in TDS mode). You are now ready to measure samples
with your new temperature compensation factor.
11
2. Disabling Temperature Compensation
a.
As in Procedure to Select a Solution, pg. 10, select “USER”
mode.
b.
With “USER” selected, press
show .00%/°C, hold
MR
CAL
MCLR
. If the display does not
VI.
long enough to bring the tempco to
.00%/°C (see Figure 3).
c.
B. Rules for Calibration in the Ultrameter
1. Calibration Steps
a. Starting Calibration
MCLR
User
% / °C
Calibration is begun by pressing
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. 26).
a.
While in “USER” mode, press TDS .
b.
Press
CAL
MCLR
MCLR
or
The reading is changed with the
MS
and
MR
to match the known
value. The calibration for each of the 4 solution types may be performed
from either conductivity or TDS mode.
twice (to skip
User
Cond
Gain only
Tempco, then Gain
Res
Done in conductivity
Done in conductivity or TDS
TDS
Gain only
Tempco, Ratio, then Gain
User
RATIO
Figure 4
over calibration adjustment)
to accept new conversion ratio.
You are now ready to measure samples with the new
conductivity/TDS ratio.
12
TDS. Measuring continues, but the CAL icon is on, indicating calibration
is now changeable.
KCl, NaCl or 442
MR
keys until new conversion
ratio is displayed.
Press
while measuring Conductivity or
twice (to skip over tempco adjustment), and
Adjust with MS
CAL
CAL
MCLR
b. Calibration Steps
Depending on what is being calibrated, there may be 1, 2 or 3 steps to
the calibration procedures.
“RATIO ” will appear (see Figure 4).
d.
CALIBRATION
A. Calibration Intervals
Generally, calibration is recommended about once per month with
Conductivity or TDS solutions (ref. Calibration Intervals, pg. 19).
Press CAL twice (3 times
if in TDS mode). Temperature
compensation is now disabled
(=0) for measurements in
USER mode.
c.
In the first five sections, you have learned all
you need to make accurate measurements. The
following sections contain calibration, advanced
operations and technical information.
The
TDS
CAL
MCLR
becomes an “ACCEPT” key. At each point, pressing
CAL
MCLR
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
as is.
CAL
MCLR
to accept the present value
13
c. Leaving Calibration
You know you are finished when the “CAL” icon goes out. Pressing any
measurement key abandons changes not yet accepted and exits
calibration mode.
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, or a very dirty
cell cup (ref. Troubleshooting Chart, pg. 21).
C. Calibration Procedures
1. Conductivity or TDS Calibration
a.
Refill conductivity cell with same standard.
c.
Press
COND
press
MCLR
CAL
, “CAL” icon will
Press
MS
µS
442
°C
appear on the display (see
Figure 5).
d.
CAL
or TDS , then
or
MR
COND
Figure 5
to step the displayed value toward the
standard’s value or hold a key down to cause rapid scrolling of the
reading.
e.
Press
CAL
MCLR
a.
Rinse conductivity cell three times with your standard.
b.
Refill conductivity cell with same standard.
c.
Press
once to confirm new value and end the calibration
d.
14
or TDS , then press CAL twice in COND/three
MCLR
Press
MS
or MR
to step the displayed value toward the
standard’s value or hold a key down to cause rapid scrolling of the
reading.
Press CAL
MCLR
once to confirm new value and end the calibration
sequence for this particular solution type.
3. Resistivity Calibration
Resistivity is the reciprocal of Conductivity. Resistivity is calibrated only if
conductivity is calibrated for the same solution type.
4. Reloading Factory Calibration (Cond or TDS)
If calibration is suspect or known to be wrong, 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 Ultrameters,
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 standard solutions. If
another solution type requires resetting, change solution type and
repeat this procedure.
a.
Press
b.
Press
COND
CAL
MCLR
or TDS .
. (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.)
sequence for this particular solution type.
If another solution type is also to be measured, change solution type now
and repeat this procedure.
COND
times in TDS. The “CAL” icon will appear on the display.
e.
Rinse conductivity cell three times with proper standard (KCl,
NaCl, or 442) (ref. Con./TDS Standard Solutions, pg. 22). For
user calibration see User Calibration Cond./TDS, pg. 15.
b.
2. User Calibration Conductivity/TDS
c.
Press MS
d.
Press
CAL
MCLR
key until “FAC ” appears and release.
to accept the factory calibration setting.
15
5. Temperature Calibration
Temperature calibration is not necessary in the Ultrameter.
1.
Press MR and scroll to location #3 .
VII.
MEMORY
This feature allows up to 20 readings with their temperatures to be stored
simultaneously for later recall.
2.
Press
3.
Fill conductivity cell with sample.
4.
Press
1.
2.
A. Memory Storage
While displaying a measurement, press
displayed value.
“MEMORY ” will appear and
the temperature display will be
momentarily replaced by a
number (1-20) showing the
position of the record. Figure
6 shows a reading of 1806 µS
stored in memory record #4.
MS
2.
4.
to measure sample and press
COND
MS
to store
reading in location #3 .
MEMORY
µS
442
5.
The next memory stored will go into location #8 .
6.
To clear all records: After
pressing
°C
COND
MR
CAL
MEMORY
, scroll down
to “CL r ALL ” in measurement
and temperature area
(see Figure 7).
B. Memory Recall
Press one of the measurement keys.
Figure 7
7.
Press
VIII.
CHANGING from CENTIGRADE to FAHRENHEIT
1.
Press
(the temperature display alternates between temperature
recorded and location number).
2.
Press
MR
to display the stored memory records.
Press a measurement key to leave memory recall or allow to
automatically turn off.
3.
Press
MR
repeatedly until you pass the memory “CL r ALL ”
Press
MR
, “MEMORY ” will appear, and the display will show
the last record stored.
3.
to clear old record #3 .
to record the
Figure 6
1.
CAL
MCLR
Press the MS or
MR
to scroll to the record location desired
C. Clearing a Record/Memory Clear
CAL
After recalling a certain record location, press MCLR to clear that
MCLR
COND
. All records will be cleared.
.
location. The display will show a “C” or “F” (see Figures 8 & 9).
memory. This space will be the place for the next memory record,
unless you scroll to another 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 filled.You want to clear the conductivity
reading stored in record location #3 and replace it with a TDS reading.
16
Figure 8
Figure 9
17
CAL
4.
Press
MCLR
; the display will change to the other unit.
5.
Press
COND
; all temperature readings are now in degrees last
shown.
N O T E : Tempco will still be shown in %/°C.
IX.
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.
1.
Press
2.
Press
3.
Press MR
COND
MR
.
to display the stored memory records.
18
Press CAL
MCLR
CALIBRATION INTERVALS
There is no simple answer as to how often one should calibrate an
instrument. The Ultrameter 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
specified accuracy, any instrument has to 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. 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.
Calibration is purposely limited in the Ultrameter to ±10% because more
than that indicates damage, not drift.
C. Conductivity, RES, TDS Practices to Maintain Calibration
repeatedly until
you pass the CLr ALL and the
C-F locations. The display will
show a “FAC SEL ”
(see Figure 10).
4.
X.
Figure 10
1.
Clean oily films 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, pg. 24),
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 reflect temperature changes
more than the instrument’s accuracy.
3.
Rinse out the cell with pure water after making measurements.
Allowing slow dissolving crystals to form in the cell contaminates
future samples.
to accept the resetting.
19
CARE and MAINTENANCE
XII.
TROUBLESHOOTING CHART
Battery weak or not connected.
1. Dirty electrodes.
2. Test samples greater than
1 megohm.
Film or deposits on electrodes.
1. Contamination from previous
sample or from pH sensor well.
2. Carbon dioxide in test sample.
No display, even though
measurement key pressed
Unstable
Conductivity/TDS/
Resistivity readings
Unable to calibrate
Conductivity/TDS
Resistivity readings
much lower than expected
N O T E : Because of nonvolatile EEPROM circuitry, all data stored in
memory and all calibration settings are protected even during power loss
or battery replacement.
C. Cleaning Conductivity/TDS/Resistivity Cell Cup
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 film will form. This film reduces accuracy. When
there are visible films of oil, dirt, or scale in the cell cup or on the
electrodes, use a foaming non-abrasive household cleaner. Rinse out
the cleaner and your Ultrameter is ready for accurate measurements.
20
Clean cell cup and electrodes (ref.
Cleaning Cell Cup, pg. 20).
Possible Cause
Symptom
B. Battery Replacement
Dry Instrument THOROUGHLY . Remove the four (4) bottom
screws. Open instrument carefully; it may be necessary to rock the
bottom slightly side to side to release it from the RS-232 connector.
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.
Corrective Action
Leaving the Ultrameter in a vehicle or storage shed on a hot day can
easily subject the instrument to over 150°F. This will void the warranty.
1. Clean cell cup and electrodes (ref.
Cleaning Cell Cup, pg. 20).
2. Minimize test sample exposure to air
(ref. Measuring Resistivity, pg. 10).
A. Temperature Extremes
Solutions in excess of 160°F/71°C should not be placed in the cell cup
area; this may cause damage. Care should be exercised not to exceed
rated operating temperature.
Check connections or replace battery
(ref. Battery Replacement, pg. 20).
Ultrameters should be rinsed with clean water after use. Solvents should
be avoided. Shock damage from a fall may cause instrument failure.
1. Rinse cell cup more thoroughly before
measurement. Insure pH cap is snugly
in place.
2. See Measuring Resistivity, pg. 10.
XI.
21
XIII.
ACCESSORIES
A. Conductivity/TDS Standard Solutions
Your Ultrameter 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 and 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. Order KCl-7000.
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 three decades ago. It is used around the world for
measuring both conductivity and TDS in drinking water, ground water,
lakes, streams, etc. The 3000 ppm is the recommended standard. Order
442-3000.
3. Sodium Chloride (NaCl)
This is especially useful in sea water mix applications, as sodium chloride
is its 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. Order NaCl-14.0.
B. Soft Protective Case
Padded Cordura® Nylon carrying case features a belt clip for hands-free
mobility. Model: UCC
® Registered trade mark of DuPont
C. Data Port
There is a 4 pin connector marked “Factory Use Only” on the bottom of
the Ultrameter. It is used to interrogate the instrument during final
inspection. Applications in the future for downloading recorded data are
being considered, but not implemented, as of this printing.
22
D. pH Buffer Solutions
pH buffers are available for your other Myron L Company instruments in
pH values of 4, 7 and 10. The Myron L buffer solutions are traceable to
NIST certified pH references and are color-coded for instant
identification. They are also mold inhibited and accurate to within ±0.01
pH units @ 25°C. Order 4, 7 or 10 Buffer.
E. pH Sensor Storage Solution
Myron L Storage Solution prolongs the life of the pH sensor. It is available
in quarts and gallons. Order SSQ or SSG.
XIV.
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.
A. Standardized to 25°C
Conductivity is very accurately measured in the Ultrameter by a method
that ignores fill level, electrolysis, electrode characteristics, etc., and uses
a microprocessor to perform temperature compensation. In simpler
instruments, conductivity values are usually assigned an average
correction similar to KCl solutions for correction to 25°C. The correction to
an equivalent KCl solution is a standard set by chemists. It standardizes
the measurements and allows calibration with precise KCl solutions. In
the Ultrameter, 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 uses corrections that
change with concentration and temperature instead of single average
values. See Chart 1 on next page.
23
2.500%
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 shown in the graph below.
2.400%
2.300%
7%
2.200%
442 error with KCl tempco
6%
2.100%
% / °C
2.000%
NaCl error with KCl tempco
5%
4%
1.900%
1.800%
KCl % / °C
1.700%
3%
2%
1.600%
Temperature
1.500%
0
5 10 15 20 25 30 35 40 45 50 55 60
Chart 1
1%
0%
(1)%
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 (or 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%.
Temperature
(2)%
0
5
10
15 20 25 30 35 40 45 50 55
Chart 2
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. Some 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 will provide the
repeatability and convertibility of data needed for relative values for
process control.
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 always been relative measurements seeking a number
24
25
to indicate a certain setpoint or minimum concentration or trend. The
Ultrameter gives the user the capability to take data in “KCl conductivity
units” to compare to older published data, in terms of NaCl or 442, or as
may be appropriate. The Ultrameter can be used to reconcile data taken
with other compensation assumptions, especially with its ability to allow
custom characteristics through the USER mode.
XV.
CONDUCTIVITY CONVERSION to
TOTAL DISSOLVED SOLIDS (TDS)
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 (ref. Temperature
Compensation, pg. 23).
measurements,
temperatures.
and
should
be
reset
for
different
dilutions
or
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 R.O. 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%.
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, using 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 solve this problem, industrial users
commonly use the characteristics of a standard material as a model for
their solution, like the KCl 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 contains internal algorithms for these 3 most commonly
referenced compounds. In the LCD display, the solution type being used
is shown on the left. Besides KCl, NaCl, and 442, there is the “USER”
choice. The benefit of USER is that one may enter the temperature
compensation and TDS ratio by hand, greatly increasing accuracy of
readings for a specific solution. That value remains a constant for all
26
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.
Those who want true TDS readings that will correspond to evaporated
weight will select the correct Solution Type. 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.
XVI.
TEMPERATURE COMPENSATION (Tempco)
and TDS DERIVATION
The Ultrameter contains internal algorithms for characteristics of the 3
most commonly referenced compounds. In the display, the solution type
being used is shown on the left. Besides KCl, NaCl, and 442, there is the
“USER” choice. The benefit of USER mode is that one may enter the
tempco and TDS conversion values of a unique solution from the
keyboard.
A. Conductivity Characteristics
When making 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 happened
over this change of 10°C. The solution is said to have a tempco of 2.2
%/°C.
27
Another solution would have a different tempco because of its ionization
activity. And, that tempco may be a little different at a different
concentration or temperature. This is why the Ultrameter uses
mathematically generated models for known salt characteristics that 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 fixed tempco
for a limited measurement range, enter a specific value through the
“USER” function. The tempco can be determined by 2 different
methods:
1.
2.
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. 12 (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.
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 Tempco, pg. 11. 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.
XVII.
GLOSSARY
Anions -
Negatively charged ions.
See Solution Characteristics, pg. 26.
Algorithm -
A procedure for solving a mathematical problem.
See Temperature Compensation and TDS Derivation,
pg. 27.
TDS
Total Dissolved Solids or the Total Conductive Ions
in a solution. See Conductivity Conversion to TDS,
pg. 26.
-
Tempco -
Temperature Compensation
See Temperature Compensation, pg. 23.
USER -
A mode of operation that allows the instrument user
(operator) to set a tempco and/or a TDS factor for their
specific solution type. See Temperature Compensation,
pg. 23 and Temperature Compensation (Tempco) and
TDS Derivation, pg. 27.
For details on specific areas of interest refer to Table of Contents.
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 some
with concentration. The ratio is set during calibration in USER as in User
Programmable Conductivity to TDS Ratio, pg. 12. 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.
28
29
Ultrameter™
Operation
Manual
Addendum
Models 4P & 6P
Software Versions 2.03, 2.10, 2.51 & Later*
* See page 5 to determine the version of software of your Ultrameter™.
UMMA10-01
WEB
I.
ENHANCED HIGH RESISTIVITY MEASUREMENTS
The resistivity calculations in the Ultrameter have been improved for
measuring waters greater than 10 Megohms. When the Ultrameter is in
one of the solution modes (i.e. KCl, NaCl or 442) and the resistivity
reading is greater than 10 Megohms, the Ultrameter performs automatic
temperature compensation for high purity water. As such, the maximum
possible value that should be displayed for water is 18.2. It may be
possible to display readings higher than 18.2 if the instrument is not
calibrated or if solutions other than water are being measured. To
insure proper use of the instrument in this mode, readings greater than
20 Megohms will display "- - - -" indicating an over-range condition. To
obtain resistivity readings for solutions other than water, the User
mode should be selected. In User mode the Ultrameter will display
resistivity measurements up to 30 Megohms.
An Offset Zero Calibration feature was added to software version
2.03, and must be performed by the user, see below. On all later versions
this function is performed at time of manufacture.
A Cell Check feature was added to these later versions. See page 2.
Offset Zero Calibration For Instruments with Software Version 2 . 0 3
When performing measurements of waters above 10 Megohms, the
accuracy of the Ultrameter may be improved by performing an offset zero
calibration. Follow the steps below to perform an offset zero calibration.
Press R E S key to power up the unit.
2.
Verify that the cell cup is empty of any solution and "- - - -" is
displayed by the Ultrameter. If a reading other than "- - - -" is
displayed, clean the cell cup and repeat steps 1 & 2. See
"Cleaning Sensors".
Press the MR key until
"CAL0" appears. Fig. 1.
4.
Press the
CAL
MCLR
key. The
Figure 1
instrument should momentarily
display a number of counts, and return to Resistivity mode.
5.
1
1.
Press R E S key to power up the unit.
2.
Verify that the cell cup is empty
of any solution and "- - - -" is
displayed by the Ultrameter. If
a reading other than "- - - -" is
displayed, clean the cell cup
and repeat steps 1 & 2. See
"Cleaning Sensors".
3.
Press the MR key until
Figure 2
"CELL ch" appears. Fig. 2.
4.
Press the
CAL
MCLR
key. If the cell
is clean, “Good” will
momentarily be displayed. Fig. 3.
1.
3.
Cell Check For Instruments with Software Version 2.10 & Later.
In these versions, a Cell Check feature has been added to further
increase the performance of your instrument. This is especially important
when in R E S mode reading High Resistivity or Ultrapure waters. This
feature, utilizing technological improvements, knows when the
Conductivity Cell cup is dirty and calls it to your attention. You may then
choose to clean the Conductivity Cell cup or ignore it by pressing the
CAL key. Follow the steps below to perform a Cell Check.
If the calibration has failed the display will show "Err". If an error
occurs during this step, the cell cup is probably contaminated.
Rinse the cup with DI water several times to clean and Repeat
steps 1-4.
5.
If the Cell Check has failed
the display will show
“CELL cLn”, Fig. 4, alternating
with a number such as “5 3 ”,
Fig. 5, indicating a relative
amount of contamination or dirt
in the Conductivity Cell. To
insure the highest quality
readings, the Conductivity Cell
cup should be cleaned before
measuring High Resistivity
solutions. Rinse the cup with
DI water several times to clean,
and Shake instrument well to
remove excess water.
Repeat steps 1-4.
Figure 3
Figure 4
Figure 5
2
II.
USER MODE CALIBRATION LINK
4.
A new function has been added to the Ultrameter that makes calibration
of the unit while in "User" mode easier, and more repeatable and accurate
than other calibration methods. It is recommended that this calibration
method be used to provide the highest degree of confidence when the
Ultrameter is used in "User" mode.
Press the
CAL
MCLR
key. The
instrument will display "S E L "
and the “User” Icon. Fig. 7.
User
Figure 7
A.
1.
2.
Calibration of Ultrameter for use in User Mode
Press the
COND
Any additional display of KCl, NaCl or 442 icons indicates a link between
the User solution and the other solution displayed.
or TDS key to power up the Ultrameter.
5.
Calibrate the unit using a Standard Solution. Refer to
CALIBRATION in Operation Manual.
4.
Verify/Set the calibration link. (See below – Setting User Mode
Calibration Link).
Setting User Mode Calibration "Link"
The link function sets or "links" the calibration gain factor of a Standard
Solution to the User solution mode. Once set, the "link" will stay intact
with future calibrations unless the link has been canceled. For more
information on canceling the User Mode Calibration Link refer to the
section below "Canceling User Mode Calibration Link". Follow the steps
below to set either the KCl, NaCl or 442 calibration factor to the User
solution mode.
Press measurement key desired to be “Linked”, i.e.,
COND
R E S or TD S .
2.
3.
Place the Ultrameter in User mode. Refer to SOLUTION
SELECTION in Operation
Manual for selecting the User
Mode.
Press the MR arrow key until
the menu "Linc" appears.
Fig. 6.
3
Figure 6
keys to
KCl
Place the Ultrameter in User mode. Refer to SOLUTION
SELECTION in Operation Manual.
1.
MR
select a Standard Solution to be
linked to the User mode
User
calibration constant.
(see Fig. 8, User linked to KCl).
3.
B.
Press the MS
,
Figure 8
Note: If none of the Solution Selection icons are displayed (i.e. KCl,
NaCl or 442) nothing has been linked to User mode.
6.
Press the
CAL
MCLR
key to accept the setting. Pressing any of the
measurement keys will exit without changing the setting. User
mode "link" 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 "Link"
The Ultrameter must be in User linked mode in order to cancel the "link".
Refer to SOLUTION SELECTION in Operation Manual.
1.
Press “Linked” measurement key
COND
,
R E S or TDS .
Two solution icons will be shown the left side of display - “User”
and another, i.e., “ KCl”.
2.
Press the MR key until the menu "Linc" appears. Fig. 5.
3.
Press the
Icon.
CAL
MCLR
key, the unit will display "S E L " and the “User”
4
4.
Press the
MR
key until "User" is the only solution icon being
displayed.
CAL
5.
Press the
6.
The User mode calibration "Link" has now been canceled.
MCLR
key.
NOTES:
1. To maintain repeatability, use the same standard solutions for future
calibrations.
2. Calibration of the Ultrameter Gain Factor for User mode is not available
when the calibration link 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 the manual, the User Mode Link should be canceled. See
above Canceling User Mode calibration "Link".
3. Once a "link" has been established for User mode, the "link" will apply
to all measurement modes using User solution selection (i.e. TDS/User,
Cond/User or Res/User).
* CHECKING YOUR INSTRUMENTS SOFTWARE VERSION
1.
Press
2.
Press the
COND
key to power up the unit.
MR
key until three numbers are displayed as shown.
in Fig. 9. If one of the listed
versions is displayed, the
ENHANCED HIGH RESISTIVITY
MEASUREMENTS, and the
USER MODE CALIBRATION
LINK are available.
3.
Press
COND
key, instrument
Figure 9
will time out in ~15 seconds.
If one of the listed versions is NOT displayed, and these functions are
required, contact the Myron L Company for information on upgrading
your instrument.
5
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