Myron L 729II - Manual (Page 65)

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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.
DESCRIPTION
The Myron L Company manufactures three basic types of con-
ductivity/TDS standard solutions — KCl, NaCl and 442™. See
below.
Most Myron L standard solution bottles show three values refer-
enced 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 follow-
ing salt proportions: 40% sodium sulfate, 40% sodium bicar-
bonate, 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 sodi-
um 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 cali-
brated using 7pH buffer. SPAN may be calibrated using any high
quality ORP mV solution.
These same buffers may be used for calibration and recertifica-
tion 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, SSG or SS2OZ.
Order example: 442-3000QT
KCl-7000GAL
PH10-2OZ
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
NaCl-7500
C.2.a. pH Buffer Solutions
pH4.0
pH7.0
pH10.0
C.2.b. pH/ORP Storage Solution
SSQ - Quart/liter
SSG - Gallon
SS2OZ - 2 oz.
Customer-specific Standard Solutions available by special order.
Contact us with your request.