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110 UDA2182 Universal Dual Analyzer Product Manual January 2009
Sub-menu
selection
Parameter Selection or Range of
Setting
Parameter Definition
Cond Units
Type
NIST (default)
ISO
The NIST system of conductivity measurement
uses units of centimeters, and in the UDA are
specifically µS/cm and mS/cm for conductivity
and KΩ-m for resistivity.
The ISO system of conductivity measurement
uses units of meters, and in the UDA are
specifically μS/m, mS/m and S/m for conductivity
and KΩ-m for resistivity.
The conductivity “Units Type” selected here
affects the “PV Type” selections available under
“Setup/Inputs/pH Preamp n. Selection of units
type will scale all live conductivity and Resistivity
readings on monitor and input calibration screens
according to the factors listed:
NIST ISO ISO/NIST factor
μS/cm μS/m
0.01
μS/cm
mS/m 10
mS/cm S/m 10
MΩ-cm KΩ-m
0.1
Cond Wire
Size
AWG (default)
Sq mm
“Wire Size Units” allows selection of either AWG
or Square millimeters (Sqmm). When changing
units, the wire size parameter value is not
converted. A pop-up message warns you of this.
Cond Wire Len
Feet (default)
Meters
“Wire Length Units” allows selection of either
meters or feet for the Wire Length parameter in
the Inputs group. When changing units, the wire
length parameter value is not converted. A pop-
up message warns you of this. If the value is no
longer within range, it will change to closest
range limit.
Cation Calc None
pH NH
3
pH Amines
ppbCO
2
None
Ammonia pH – Specific conductivity
temperature compensation assumes Ammonia
NH
3
is the base reagent
Amine pH – Specific conductivity temperature
compensation assuming a generic amine base.
CO
2
determination by degassed conductivity.