Myron L 729II - Manual (Page 57)

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C. STANDARD SOLUTIONS & BUFFERS
1. pH and ORP BUFFER SOLUTIONS
Your pH and/or ORP Monitor/controller has been factory certified
to meet certain specifications based on the appropriate Myron L
Company NIST traceable buffer solutions. These same solutions
are available to you.
NOTE: ORP ZERO is calibrated using 7pH buffer. SPAN may be
wet 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 instruments.
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 your pH or ORP
sensor. Sensor must be stored in Storage Solution. It is available
in 2oz bottles, quarts and gallons. Order SS2oz, SSQ or SSG.
2. CONDUCTIVITY/TDS STANDARD SOLUTIONS
For your Conductivity/TDS Monitor/controllers. Your
Conductivity/TDS Monitor/controller requires the same care and
calibration as your pH and ORP Monitor/controller. With the
following Myron L Company NIST traceable standard solutions it
is possible for you to maintain the accuracy required in your
process.
These same standards may be used for calibration and
recertification of your Myron L or other handheld instrument.
DESCRIPTION
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.
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.
C.1.a. pH Buffer Solutions
pH4.0
pH7.0
pH10.0
C.1.b. pH/ORP Storage Solution
SS2oz - 2 oz bottle
SSQ - Quart/liter
SSG - Gallon
C.2.a. Potassium Chloride Standards
KCl-18
KCl-180
KCl-1800
KCl-18,000
KCl-70
KCl-700
KCl-7000
KCl-70,000
C.2.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.2.c Sodium Chloride Standards
NaCl-12.5
NaCl-13.4
NaCl-14.0
Customer Standard Solutions available by special order. Contact
us with your request.