Endress+Hauser Liquisys M CCM223, Operating Instructions Manual

Page: 72 / 124

Commissioning Liquisys M CCM223/253
72 Hauser
6.6 Calibration
To access the "Calibration" function group, press the CAL key.
This function group is used to calibrate and adjust the measuring point.
For the calibration of the "free chlorine" measurement you have to consider the pH value
and the temperature of the medium. You will find the limit values in the following table:
Pay attention to the following:
• For chlorine and chlorine dioxide calibration you need a photometer, e.g. CCM 182 (see
"Accessories"). To calibrate chlorine and chlorine dioxide for trace detection (< 0.1 mg/l),
use a photometer with higher accuracy and lower detection limits.
• If the calibration is aborted by pressing the PLUS and MINUS keys at the same time (return
to C15, C29 or C35) or if the calibration is faulty, the original calibration data will continue
to be used. A calibration error is indicated by an “ERR” and a flashing sensor symbol on the
display.
In this case, repeat the calibration!
• The instrument is automatically switched to Hold during calibration (factory setting).
• After calibration, the system jumps back to the measuring mode. During the dwell period
the Hold symbol is displayed.
Sensor pH
min
pH
max
T
min
T
max
CCS140 4 8 10 °C (50 °F) 45 °C (113 °F)
CCS141 4 8.2 2 °C (36 °F) 45 °C (113 °F)
CCS240 - - 2 °C (36 °F) 45 °C (113 °F)
CCS241 - - 2 °C (36 °F) 45 °C (113 °F)
CCS120 5.5 9.5 5 °C (41 °F) 45 °C (113 °F)
Coding Field Selection or range
(factory settings bold)
Display Info
C(1)
Function group
CALIBRATION:
Calibration Cl
2
/ClO
2
Cl2
ClO2
Cl2 at A1 = 120/140/141/963
ClO2 at A1 = 240/241
C11
Enter DPD
calibration value Value of previous
calibration
Minimum values for calibration:
• for CCS120/140/240 and sensor 963:
0.05 mg/l
• for CCS141/241: 0.01 mg/l
C12
Zero point
calibration? no
yes
Only for A1 = 963
Zero point calibration:
1. Send non-chlorinated water through
the assembly.
2. Wait 10 min.
3. Adopt by selecting ENTER
C13
Display slope
100 %
minimum 25 % (3 %)
maximum 500 %
Minimum permitted slope:
• for CCS140/141 with pH
compensation and for CCS240/241: 25
%
• for CCS120/140/141 without pH
compensation and for sensor 963: 3 %
C
CALIBRAT
Cl2
C11
mg/l
DPD value
0.50
C12
Zero cal
no
C13
%
Slope
100