Thermo Scientific Orion Star A220 Series User Manual page 25

Thermo Scientific
The nominal cell constant (K) values for Thermo Scientific Orion conductivity sensors
compatible with Star A220 series conductivity meters are listed below.
Catalog
Description
Number
Orion 4-cell conductivity/temperature sensor with
013005MD
1.5 meter (5 foot) cable
Orion 4-cell conductivity/temperature sensor with
013010MD
3 meter (10 foot) cable
Orion 4-cell conductivity/temperature sensor with
013020MD
6 meter (20 foot) cable
Orion 4-cell conductivity/temperature sensor with
013025MD
10 meter (32 foot) cable
Orion 4-cell conductivity/temperature sensor with
013605MD
1.5 (5 foot)meter cable
Orion 4-cell conductivity/temperature sensor with
013610MD
3 meter (10 foot) cable
Orion pure water 2-cell conductivity/temperature
013016MD
sensor with 1.5 meter (5 foot) cable
Orion 2-cell conductivity/temperature sensor with
011510MD
3 meter (10 foot) cable
Orion 2-cell conductivity/temperature sensor with
011050MD
1.5 meter (5 foot) cable
Orion high range 2-cell conductivity sensor with
018020MD
1.5 meter (5 foot) cable
Reference Temperature, Temperature Compensation and Coefficient Settings
Orion Star A222 conductivity meters offer several options for temperature compensated
conductivity measurements. Temperature has a large effect on the conductivity value of a
solution. The temperature compensation feature allows the meter to use the sample
conductivity and temperature readings to calculate and display the conductivity that the sample
would be expected to have at a selected reference temperature, such as 25 °C. To accurately
use the temperature compensation feature, select the proper type of temperature compensation
for the samples to be measured; set the required reference temperature as 15 °C, 20 °C or 25
°C; and use a conductivity sensor with built-in ATC temperature probe. The options for
temperature compensation are:
Linear – uses the temperature coefficient value to apply a constant percent correction
·
factor to every degree change in temperature. A few common linear coefficient values are:
Solution (25 °C to 50 °C)
Sugar Syrup
Ultra Pure Water
98% Sulfuric Acid
Salt (NaCl)
Measurement Range
1 μS/cm to 200 mS/cm
1 μS/cm to 200 mS/cm
1 μS/cm to 200 mS/cm
1 μS/cm to 200 mS/cm
10 μS/cm to 200 mS/cm
10 μS/cm to 200 mS/cm
0.01 μS/cm to 300 μS/cm 0.1 cm
10 μS/cm to 200 mS/cm
1 μS/cm to 20 mS/cm
10 μS/cm to 2000 mS/cm 10 cm
Temperature Coefficient (% / °C)
5.64
4.55
2.84
2.12
Orion Star A220 Series Portable Meter User Manual
Chapter 3 Meter Setup Menus
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Nominal Cell
Constant
0.475 cm
-1
0.475 cm
-1
0.475 cm
-1
0.475 cm
-1
0.55 cm
-1
0.55 cm
-1
-1
1.0 cm
-1
1.0 cm
-1
-1
25
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