Electro-Chemical Devices (ECD) L20 C - Manual (Page 8)

Press “Enter” key to save the new value and go to the next
calibration parameter.
Temperature Coefficient
The unit uses the temperature coefficient to calculate temperature
compensated conductivity. The default value is
1.91%. To change the Temperature Coefficient, use the “up” and
“down” keys to adjust the value between 0 and 4.00%. Press
“
Enter” key to save the new value and go to the next calibration
parameter.
Temperature Reference
The unit uses the temperature reference value to calculate
temperature compensated conductivity. The default value is 25℃.
To change the Temperature Reference, use the “up” and “down”
keys to adjust the value between 15 and 25℃. Press “Enter” key
to save the new value and go to the next calibration parameter.
Probe Basic Cell Constant
The main display shows the deviation of the conductivity probe
(calibrated previously or default, the deviation range is 70%~130%,
100% without error). The secondary display shows the current
selected cell constant. Using the “up” and “down” keys to adjust the
probe basic cell constant to that you use from the 4 available cell
constants (0.01, 0.1,1.0 and 10.0). Press “Enter” key to save the
new value and go to the next calibration parameter.
Cell Constant Calibration
1. Immerse the probe in a standard of known conductivity
solution (See section Preparing Standard Solutions),
preferably a standard in the middle range of the solutions
to be measured. Immerse the probe (at least 2” to 3” or
5~7cm from the tip) without touching the sides of the
calibration container. Shake the probe lightly to remove
any air bubbles trapped in the conductivity cell. The unit
will display the conductivity value of the standard solution.
During cell constant calibration, the following parameters
are over-ridden: temperature reference (fixed to 25.0℃)
and temperature coefficient (fixed to 1.91%). [Note: If you
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