Calibration
16
7.2. CONDUCTIVITY
Calibrate the probe frequently for improved accuracy. Additionally, calibrate the probe:
• before installation
• whenever the probe is replaced
• after periodic maintenance
Always use fresh calibration solutions and perform electrode maintenance prior to calibration (see “Maintenance
& Care” section).
Preparation
Pour standard solution into clean beakers sufficient to cover the sensing portion of the probe.
If possible, use plastic beakers to minimize any EMC interferences. For accurate calibration and to minimize
cross‑contamination, use two beakers, one for rinsing the probe and one for calibration.
Procedure
• Raise and lower the probe in the standard to ensure the entire cell area is filled with standard.
• Shake any bubbles off the two electrodes.
• Center probe in beaker away from beaker walls.
One-point calibration
One‑point calibration can be performed using 35.00 ppt salinity standard solution.
1. Press
z
key to enter calibration mode.
2. Press
v
key to select EC calibration. Selected calibration mode is displayed blinking.
PH
EC
3. Press
e
key to start. “35.0 ppt
USE
” message is displayed as calibration point.
35.0
U S E
4. Used standard is automatically recognized. When the standard is recognized “
REC
” is displayed. “
WAIT
”
is displayed until the reading is stable and the calibration is accepted.
35.0
R E C
35.0
W A I T
