YSI EC300 - Manual (Page 7)

2. Press MODE to enter the desired measurement mode. The message ‘rAng’ (range) may
appear briefly on the display indicate auto-ranging; this is normal. Allow temperature to
stabilize before taking measurements.
PROBE MAINTENANCE
The most important requirement for accurate and reproducible conductivity measurements is a
clean cell. A dirty cell changes the conductivity of a solution through contamination. Clean the
cell thoroughly before storing it. To clean the conductivity cell:
1.
Dip the cell in cleaning solution and agitate for two to
three minutes. Any foaming acid tile cleaner, such as
Dow Chemical Bathroom Cleaner, should clean
adequately. For a stronger cleaner, use a solution of
1:1 isopropyl alcohol and 1 N HCl. Remove the cell
from the cleaning solution.
2.
Use the nylon brush (supplied) to dislodge any
contaminants from inside the electrode chamber.
3.
Repeat steps one and two until the cell is completely clean. Rinse the cell thoroughly in
deionized, or clean tap water.
TROUBLESHOOTING
MAIN DISPLAY PROBLEM POSSIBLE SOLUTION
OvEr
• Conductivity is >200.0 mS
• Salinity is > 70.00 ppt
OvEr/Undr during calibration
Cell Constant Calibration is
out of range
• Completely submerge the
probe.
• Allow sufficient time for the
electrode and Temp probe
stabilization.
• Recalibrate with correct value
for the conductivity standard.
• Replace conductivity standard.
• Clean cell.
• Return for service.
MAIN
DISPLAY
SECONDARY
DISPLAY
OvEr/Undr OvEr
Undr
Temperature >90.0
°C
Temperature < -10.0
°C
• Decrease/Increase the sample
temperature.
• Return for service.
6