Myron L 6Pfc and 4P - Manual (Page 41)

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E. Soft Protective Carry Cases
Padded Nylon carrying case features a belt clip for hands-free mobility.
Two colors to choose from:
Blue - Model #: UCC
Desert Tan - Model #: UCCDT
F. Hard Protective Carry Cases
Large case with 2 oz. bottles of calibration standard solutions (KCl-7000,
442-3000, 4, 7, & 10 pH buffers and pH storage solution). Model #: PKUU
Small case (no calibration standard solutions) - Model #: UPP
G. Replacement pH/ORP Sensor (6Pfc)
pH/ORP sensor is gel filled and features a unique porous liquid junction.
It is user-replaceable and comes with easy to follow instructions.
Model #: RPR
H. bluDock™ Wireless Data Transfer Accessory Package
This accessory allows the operator to download the Ultrameter II
memory stack to a spreadsheet on a computer. The package includes
bluDock modified circuit board in the unit, software CD, installation and
operating instructions, and dongle. Model #: BLUDOCK
XX. TEMPERATURE COMPENSATION (Tempco)
of Aqueous Solutions
Electrical conductivity indicates solution concentration and ionization
of the dissolved material. Since temperature greatly affects ionization,
conductivity measurements are temperature dependent and are normally
corrected to read what they would be at 25°C.
A. Standardized to 25°C
Conductivity is measured with great accuracy in the Ultrameter II using a
method that ignores fill level, electrolysis, electrode characteristics, etc.,
and features a microprocessor to perform temperature compensation. In
simpler instruments, conductivity values are usually assigned an average
correction similar to that of KCl solutions for correction to 25°C. The
correction to an equivalent KCl solution is a standard set by chemists
that standardizes the measurements and allows calibration with precise
KCl solutions. In the Ultrameter II, this correction can be set to other
solutions or tailored for special measurements or applications.
B. Tempco Variation
Most conductivity instruments use an approximation of the temperature
characteristics of solutions, perhaps even assuming a constant value.
The value for KCl is often quoted simply as 2%/°C. In fact, KCl tempco
varies with concentration and temperature in a non-linear fashion. Other
solutions have more variation still. The Ultrameter II uses corrections
that change with concentration and temperature instead of single
average values. See Chart 1, pg. 38.