Myron L D-1 User Manual

Single Range Dialysate Meter™

Battery

Indicator

Plunger

Cell Cup

Pointer

Button

Upper

Electrode

Color Band

Adjust

OPERATING INSTRUCTIONS

User’s Manual for Model D -1

DESCRIPTION

This manual describes your Myron L D-1 meter, tells
you how to use it, and how to keep it working accurately
for many years.

Your Model D-1 single 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 provides an
expanded 11-15 millimhos (millisiemens) scale for ac­curate readings.

A unique feature of Model D-1 is the green color band
above the dial. This provides an immediate visual con­rmation of whether or not the dialysate concentration
is within the patient’s “safe zone”. The color band is
adjustable and can be pre-set by the doctor or techni­cian for each patient. Adjustment is made by turning
the screw on the face of the meter. This screw may be
covered with tape or a label to avoid tampering.

The D-1 is 3.4” x 4.5” x 4.0” (85 x 129 x 126mm) and
weighs less than one pound (0.45kg). D-1 meters are
completely self-contained. The built-in cell is automat­ically temperature compensated from 60º to 110ºF
(16º to 43ºC). They are powered by two 9 volt batteries
good for a 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 D-1 Dialysate Meter. Handle your
D-1 and identify these parts to become familiar with it.

Calibration
Control

Battery Strap

Lower Electrode
(inside cell)

DIALYSATE METER

Color Band

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. 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!

2. 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 articially low readings.

3. Repeat steps 1 and 2 at least three times.

4. Take another sample, drop in the plunger and press
the black button. When the pointer stops, IMME­ DIATELY read and release the button.

5. Repeat step 4 twice and record the last reading.
NOTE: If using the “safe zone” color band and the
reading is not within the band, immediately conrm the
calibration of your D-1 with 14.0 millimhos Standard
Solution (see CALIBRATION).

6. When you are nished with the meter, RINSE THE
CELL CUP with clean water, preferably R.O., dis­ tilled, or deionized.

CAUTION:
DO NOT use with samples hotter than 110ºF (43ºC).

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 x 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.

CALIBRATION / ACCESSORIES

STANDARD SOLUTION: Myron L Company Standard

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

CHECKING CALIBRATION:

1. 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.

2. If the D-1 Meter does not indicate the 14.0 millimhos
shown on the Standard Solution bottle’s label, rst
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-1 Meter still
does not indicate the correct value, recalibrate it as
described below.

TO RECALIBRATE THE METER

1. Remove the bottom cover using ngernails or a small
screwdriver to loosen the front or rear edge. Identify
the Calibration Control (see photo below) so you can

nd 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.

IMPORTANT

The plunger enclosed with your Dialysate meter has
been calibrated specically 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.

ACCESSORIES

STANDARD SOLUTION

Your D-1 Meter has been factory
calibrated with Myron L type 14.0
millimhos Standard Solution. Myron L
Company Dialysis Standard Solution is
made with deionized water and reagent
grade Sodium Chloride, and is within

1.0% of Sodium Chloride reference
solutions. Solutions are sold in quart
and gallon sizes. 12.5 and 13.4
millimhos values are also available.