Emec MTOWER PLUS Series User Manual

15
TE & CA
Conductivity measurements are temperature dependent. The degree to which temperature affects conductivity varies
from solution to solution and can be calculated using the following formula: C25 = C / {1+[a/100(t-25)]}
where: C25 = slution conductivity at 25°C, C = conductivity at operating temperature, a = temperature coefcient of
solution %/°C.
Probe read value
(uS or ppm)
Alpha (a) Temperature
(°C / °F)
Displayed Value
(us or ppm)
5227 1.2 35°C / 95°F 4934
4524 3.5 27°C / 80.6°F 4228
3924 2.1 40°C / 104°F 2984
Samples alphas (a) are listed in the table above. To determine that “a” of other solutions, simply measure conductivity at
a range of temperatures and graORP the change in conductivity versus the change in temperature.
“MTOWER PLUS” has either xed or adjustable automatic temperature compensation referenced to a standard
temperature of 25°C. For manual temperature compensation move cursor on “TE”, press wheel and adjust manual
temperature compensation.
Move cursor on “OK” and press wheel again. Move cursor on “CA”, press wheel and choose DISABLE for manual
temperature compensation.
Otherwise for automatic temperature compensation choose “ENABLE” and see “COEFF TEMP” in “OPTIONS” menu
to set % Alpha value.
To end procedure move cursor on “EXIT” and press wheel to proceed to “Save” request screen. Move wheel on “YES”
to save or “NO” to discard changes.

Emec MTOWER PLUS Series Specifications

General

Brand	Emec
Model	MTOWER PLUS Series
Category	Controller
Language	English