Elcometer E130-S Operating Instructions Manual page 17

Temperature Compensation (T)
The temperature of the substrate and water solution will affect the
reading. As the Elcometer 130 has been calibrated at 25°C, to provide
an accurate measurement of soluble salt levels the reading must be
adjusted to take into consideration any temperature variance.
The automatic Temperature Compensation function on the Elcometer
Model T measures the temperature of the wet filter paper when
placed on the measurement electrodes and using this value,
a d j u s t s t h e r e a d i n g a c c o r d i n g l y. To a c t i v a t e , p r e s s
Menu/Setup/Temperature Comp.
The Elcometer 130 Model S does not have automatic temperature
compensation and therefore, the actual level of soluble salts needs to
be calculated manually using the following equation:
k =
1 + c [T - T ]
Example: Measured Value: 12.3μg/cm at 28°C
k =
1 + 0.02 [28 - 25]
4
If using the Elcometer 130 Model T with Automatic Temperature Compensation
disabled, the same equation should be used to correct the gauge reading for
temperature variances.
www.elcometer.com
k
measured
cal
12.3
Where:
k = Corrected Result
c = Temperature Coefficient (2.0%)
T = Measurement Temperature °C
T = Calibration Temperature (25°C)
cal
2
= 11.6µg/cm
2
R
16