Myron L D-2 User Manual

DUAL RANGE DIALYSATE METER

Operation Instructions

User Manual for Models D-2

2450 Impala Drive

Carlsbad, CA 92010-7226 USA

Tel [phone]

Fax [phone]

www.myronl.com

pH/Conductivity Instrumentation

Accuracy • Reliability • Simplicity

DESCRIPTION

This manual describes your Myron L D-2 Dialysate Meter, tells
you how to use it, and how to keep it working accurately for many
years.

Your Model D-2 dual range Dialysate Meter is a compact instrument
which operates on the principle of electrical conductivity. It will quickly
determine if dialysate concentrations are correct. Its dial is calibrated
in millimhos and features two scales, allowing it to test both
prefinalized bicarbonate and acetate/bicarbonate final dialysate.

RANGES APPLICATION

0-10 millimhos Prefinalized bicarbonate dialysate 0-20
0-20 millimho s Final dialysate

Model D-2 is 3.4"X4.5"X4.0"(85X129X126 mm) and weighs less
than one pound (0.45 kg). D-2 Meters are completely self-contained.
The built-in cell is automatically temperature compensated from 59°
to 104°F (15° to 40°C). They are powered by two 9 volt transistor
batteries good for at least 2000 tests, or one year shelf life. A light
bulb, which glows when the black button is pushed, serves as a
battery reserve indicator.

The pictures in this manual show the major operating parts of
your Myron L Model D-2 Dialysate Meter . Handle your D-2 and identify
these parts to become familiar with it.

FINAL DIALYSATE RANGE

USING YOUR METER

NOTE: Before measuring dialysate samples, check the calibration

of your meter using Myron L Company 14.0 millimhos
Standard Solution (see CALIBRATION).

1. Select the appropriate range for the dialysate to be measured
(0-10 for prefinalized bicarbonate,0-20 for acetate/bicarbonate
final dialysate).

2. Fill the cell cup to just above the top electrode with a sample of
the dialysate you want to test. The dipper end of the cell plunger
will deliver just the right amount. Be sure hands are clean and
dry to avoid contamination of the sample.

NEVER FILL THE CELL BY DIPPING THE METER INTO
SOLUTIONS!

3. Drop the plunger into the cell cup. Lift it about half way out of the
cell and drop it back in three or four times. Discard the sample.

NOTE: This procedure must be conscientiously performed for

samples at working (body) temperature to avoid artificially
high readings.

4. Repeat steps 2 and 3 at least three times.

5. Take another sample, drop in the plunger, and press the black
button. When the pointer stops, IMMEDIATEL Y read and release
the button.

6. Repeat step 5 twice and record the last reading.

7. When you are finished with the meter, RINSE THE CELL CUP
with clean water, preferably R.O., distilled, or deionized.

CAUTION:
DO NOT use with samples hotter than 104°F (40°C). The readings

WILL NOT be accurate.
DO NOT splash solvents such as lacquer thinner, acetone, benzene,
or chlorinated solvents on the plastic case.
DO NOT fix or modify the meter. That will void your warranty. See
SERVICE for details or consult Myron L Company.
DO NOT DIP THE INSTRUMENT INTO SOLUTIONS. If liquid does
get inside the instrument, see MAINTENANCE for instructions on
drying it.

CALIBRA TION/ACCESSORIES

STANDARD SOLUTION: Myron L Company Standard Solution has

a known conductivity and concentration of Sodium Chloride (NaCI).
Your Dialysate meter was calibrated at the factory using our 14.0
millimhos (7.86 grams per liter NaCI) Standard Solution. You can
keep your meter accurate by using this same Standard Solution.

CHECKING CALIBRATION:

1. Turn the Range Switch to the 0-20 range.

2. Test a sample of Myron L Company 14.0 millimhos Standard
Solution.

CAUTION: Throw the Standard Solution away as you use it. Don't
put the used samples back in the bottle.

3. If the D-2 Meter does not indicate the 14.0 millimhos shown on
the Standard Solution bottle's label, first clean the cell. For
directions on how to do this, see CELL CUP opposite. Rinse the
cell thoroughly and test the Standard Solution again. If the D-2
Meter still does not indicate the correct value, recalibrate it as
described below.

TO RECALIBRATE THE METER

1. Remove the bottom cover using fingernails or a small screwdriver
to loosen the front or rear edge. Identify the Calibration Control
(see photo below) so you can find it by touch while calibrating.

2. Test another sample of the Standard Solution (be careful to not
splash solution inside the meter).

3. Adjust the Calibration Control until the meter pointer indicates

14.0.

MAINTENANCE

BA TTER Y CHECK:

Model D-2 has a battery indicator glow light visible through the small
hole on the lower right-hand corner of the meter face plate. If this
Iight faiIs to glow when the black button is pressed, replace both
batteries.

BA TTER Y REPLACEMENT:

Detach the battery connectors. Pull on the plastic straps to remove
the batteries. Replace with fresh zinc carbon or alkaline 9 volt
batteries. Reinsert the plastic straps to secure batteries. Replace
the bottom cover.

CELL CUP:

Self-conditioning of the built-in electrodes occurs each time the button
is pressed with a sample in the cell cup. This ensures consistent
results each time. With some samples a small downward swing of
the pointer is a result of this conditioning action. This action is powerful
and removes normal films of oil and dirt. However, if samples are
allowed to dry in the cell cup, a film will build up. This film reduces
accuracy. When there are visible films of oil, dirt, or scale in the cell
cup or on the electrode, scrub them lightly with a small brush and
household cleanser. Thoroughly rinse out the cleanser, and the meter
is ready for accurate measurements.

SOLUTIONS INSIDE THE METER

Your Dialysate Meter is a rugged instrument and will withstand
dialysate exposure around its cell, meter movement, and switches.
However, care should be taken to keep solutions from leaking in
around the bottom cover. It is not sealed (to prevent condensation
from forming).

Large amounts of calibration solution or dialysate will almost
certainly damage the meter movement or electronics. Such meters
should be returned to the Myron L Company for repair.

If there are only a few drops inside the meter, dry it as follows:

1. Shake excess solution out of the inside of the meter.

2. Dab the exposed surfaces dry with an absorbent cloth or tissue.

Avoid pushing any liquid into the Calibration Control or switches.

3. Air dry the meter in a warm area with the bottom cover off. Allow

several hours for thorough drying.

If the dialysate entered through a leak in the case or cell, or if the
instrument shows erratic readings or other unusual behavior, return
it to the Myron L Company for service .

METER ZERO ADJUST

1. Set the meter on a flat surface. The pointer should rest exactly at
the ZERO mark at the far left of the dial.

2. If it doesn't, use a small screwdriver to rotate the plastic screw
below the dial (see DESCRIPTION). Adjust the pointer until it
exactly indicates zero.

ACCESSORIES

STANDARD SOLUTION

Y our D-2 Meter has been factory calibrated with Myron L
type 14.0 millimhos Standard Solution. Myron L Company
Dialysis Standard Solution is made with delonized water and
reagent grade Sodium Chloride, and is within 1.0% of Sodium
Chloride reference solutions. Quart and gallon sizes are
available.

SERVICE

If your D-2 meter fails to operate properly:

1. Check the glow light to make sure the batteries are good.

2. Check the cell cup and electrodes to ensure they are clean. Any
contamination could alter the reading. See MAINTENANCE.

Any service required other than battery replacement, cleaning,
or calibration must be referred to the Myron L Company. When
returning an instrument, please pack it securely and enclose a
note specifying the problem. The plunger should be included,
but DO NOT ship with plunger in cell (damage could result).

IMPORT ANT

The plunger enclosed with your Dialysate Meter has been
calibrated specifically for this instrument. If a different plunger is used,
the Dialysate Meter MUST BE RECALIBRATED with Standard
Solution. Make sure the plunger is completely seated in the cell cup.

ORDERING

T o order accessories or instruments, contact your nearest stocking
distributor, or the Myron L Company.

WARRANTY/SERVICE

Myron L Dialysate Meters have a limited two year warranty. if
your instrument fails to operate properly, check the batteries and
calibration. If it still fails to function properly, return it prepaid to the
Myron L Company.

Faulty instruments may be returned to us without prior permission.

METERS WITHIN TWO YEAR WARRANTY PERIOD:

Failures due to materials or worksmanship will be repaired or
replaced (our option) without charge if returned freight prepaid. If
failure is deemed by the factory to have been caused by abuse or
tampering, the following procedure will apply.

INSTRUMENTS/CONTROLS OUT OF WARRANTY:

Diagnosis will be made and repairs completed, providing the repair
charges are $70.00 or less.
NOTE: Actual repair charges may be less than this amount.

We will diagnose (but not repair) a returned meter and mail an

estimate of charges if ANY of the following apply:

1. Repair charges will be more than $70.00.

2. You specifically request an estimate of required repairs and
charges.

3. The cost of required repairs exceeds one-half the list price of a
new instrument.

4. The instrument is over ten years old. Because of component
changes and improvements, such instruments can no longer
be repaired.

NOTE: Unrepaired meters are discarded unless you want them
returned to you. If so, there is currently a $25.00 charge per
unrepaired instrument to cover diagnosis and handling.

This warranty is limited to the repair or replacement of the Myron
L Dialysate Meter only. The Myron L Company assumes no other
responsibility or liability.
www.myronl.com

pH Conductivity Instrumentation

Accuracy • Reliability • Simplicity

2450 Impala Drive

Carlsbad, CA 92010-7226 USA

el 760-438-2021

T
Fax [phone]
www.myronl.com

© Myron L Company 2001 (W)Printed in U.S.A.