Myron L Aquaswitch II - Manual (Page 44)

C . STANDARD SOLUTIONS & BUFFERS
1. CONDUCTIVITY/TDS
STANDARD SOLUTIONS
Your Conductivity/TDS Monitor/controller has been factory
certified to meet certain specifications based on the appropriate
Myron L Company NIST traceable standard solutions. These
same solutions are available to you.
D E S C R I P T I O N
The Myron L Company manufactures three basic types of
conductivity/TDS standard solutions — KCl, NaCl and 442™. See
below.
Most Myron L standard solution bottles show three values
referenced at 25°C:
Conductivity in microsiemens/micromhos, while the ppm/TDS
equivalents are based on our 442 Natural Water™, and NaCl
standards. All standards are within ±1.0% of reference solutions.
These same buffers may be used for calibration and
recertification of your Myron L or other handheld instrument.
a. Potassium Chloride (KCl)
The concentrations of these reference solutions are calculated
from data in the International Critical Tables, Vol. 6.
b. 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.
c. 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.
2 . pH and ORP BUFFER SOLUTIONS
For your pH and/or ORP Monitor/controller. Your pH and ORP
Monitor/controller requires the same care and calibration as your
Conductivity/TDS Monitor/controller. With the following Myron L
Company NIST traceable buffer solutions it is possible for you to
maintain the accuracy required in your process.
NOTE: pH and/or ORP Monitor/controllers ORP ZERO is
calibrated using 7pH buffer. SPAN may be calibrated using any
high quality ORP mV solution.
These same buffers may be used for calibration and
recertification of your Myron L or other handheld instrument.
a. pH Buffer Solutions
pH buffers are available in pH values of 4, 7 and 10. Myron L
Company 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.
b. 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.
ALL standard solutions and buffers:
$16.00US per quart/liter
$58.00US per gallon
Prices as of July 1, 2001. Subject to change—call for latest
prices.
Order example: 442-3000QT
KCL-7000GAL
C.1.a. Potassium Chloride Standards
KCl-18
KCl-180
KCl-1800
KCl-18,000
KCl-70
KCl-700
KCl-7000
KCl-70,000
C.1.b. 442 Natural Water Standards
442-15
442-150
442-1500
442-15,000
442-30
442-300
442-3000
442-30,000
442-500
442-1000
C.1.c. Sodium Chloride Standards
NaCl-12.5
NaCl-13.4
NaCl-14.0
C.2.a. pH Buffer Solutions
pH4.0
pH7.0
pH10.0
C.2.b. pH/ORP Storage Solution
SSQ - Quart/liter
SSG - Gallon
Customer Standard Solutions available by special order @
$90.00 per Gallon. Contact us with your request.
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