11 Top Blowdown
Mk8 MM Manual Page | 205
11.1.2 TDS, Conductivity and Temperature
A = These values measured by probe & sensors at steady state operating conditions.
B = This value is the conductivity value multiplied by 0.7 (TDS in PPM).
C = This conductivity value is temperature corrected to 25°C / 77°F.
D = This is measured TDS value entered into the system to affect a user “calibration”.
I. Conductivity measurement corrected at 2% per 1°C.
II. At 25°C TDS in ppm is calculated by multiplying the conductivity value by 0.7 factor.
III. Both above multipliers are user variable to accommodate specific site conditions.
At the time of manufacture, every TDS probe has a “Calibration Correction Coefficient” or CCC embedded
into its internal memory. The TDS probe is immersed in a water sample with a known TDS (3500ppm for
example) at 25°C (77°F) which would give a reading of 5000 micro-siemens. If the reading from the probe
does not agree with this general CCC value, a correction multiplier or divider is entered into this specific
probe’s memory. This is its own dedicated CCC value.
To Next Page
Loading...
