ECD FCA-22 Instruction Manual page 11

Perform a DPD test on the sample and enter the measured ppm Cl
and accept the calibration. The displayed Cal value, x.xx mV/ppm Cl
For a detailed description see Electrode Span Calibration in the C‐22 manual.
**Record the displayed Cl
the DPD test then correct the input value appropriately**.
The zero point of the sensor is extremely stable and should not need adjusting. If the calibration is
needed then place the sensor in a sample of chlorine free process water and allow it to equilibrate for ½
hour. Initiate the standardization in the Buffer: #1 ppm Menu. The Standardize Value will be 0.00 ppm
Cl and the Cal value will display the new mV signal from the sensor.
2
Chlorine Calibration Screen Shots
#1 Home Screen
Press Menu Select
Down button
#3 Selection Menu
Select BUFFER by
simultaneously pressing
the horizontal CALIBRATE
keys.
#5 Adjusting zero point
If a non‐zero ppm
solution is used then
adjust the value by
selecting the digit with the
horizontal keys and the
value with the vertical key.
#7 Leave Zero Calibration
Screen
Press Menu Select
Down button
ppm reading at the sample time, if the value has changed before finishing
2
Page 11
value in the Buffer: #2 ppm Menu
2
will change to the new slope value.
2
#2 Graphical Display
Press Menu Select
Down button
#4 Zero Point Calibration
(optional step, set at factory,
move to #7)
Initiate the calibration by
simultaneously pressing
the horizontal CALIBRATE
keys with the sensor in a
0 ppm chlorine solution.
#6 Accepting the
Calibration
Accept the calibration by
pressing the Menu Select
down key.
#8 Setting Chlorine Slope
Initiate the calibration by
simultaneously pressing
the horizontal CALIBRATE
keys with the sensor in a
known chlorine solution.
FCA‐22 Instruction Manual