Testing The Ph Probe; Reviewing The Calibration Readings (Electric Conductivity) - Wohler WA 335 Instructions De Service

10.2 Testing the pH probe

Fig. 50: Testing the pH probe
Fig. 51: Slope value within permissible
range
10.3 Reviewing the calibration
readings
(electric conductivity)
Fig. 52: Calibration information measure-
ment range 1
• Connect the pH probe to the device.
Press and hold the Set key to access the
•
Settings mode, then use the arrow keys to
access parameter P20.
Press the Enter key to access parameter
•
P22.
A slope value is displayed.
• Press the Enter key again to access param-
eter P23.
A further slope value is displayed
(as the device allows 3 calibration values, 2
slope values are displayed).
Replace the probe if the slope value is <
•
75% or > 115%.
• Connect the EC probe to the device.
Press and hold the Set key to access the
•
Settings mode, then use the arrow keys to
access parameter P30.
Press the Enter key.
•
Calibration information for P32, P33, P34 and
P35 will be displayed in succession (conductivi-
ty CON in µS/cm and mS/cm).
P32: Calibration information measurement
range 1
P33: Calibration information measurement
range 2
P34: Calibration information measurement
range 3
P35: Calibration information measurement
range 5
• Then press the Enter key to return to pa-
rameter P30 (CAL).
Settings
EN
67