37
D.O. CALIBRATION (HI98194, HI98196 only)
Single point Custom % saturation calibration
• For a calibration at another known value place sensor and temperature probe into the known solu‑
tion and change the calibration value, press the Cal. point softkey and select the desired point.
• To insert a different calibration value, press Cal. point and then Custom. Insert the desired value
using the keypad, then press Accept.
• When the reading is stable, the “Ready” message is displayed. Press Confirm to store the
calibration point.
• The following messages will appear: “Storing” and “Calibration completed”.
• Press OK to return to the “Calibration” menu.
• Press ESC twice to return to the main menu.
• Press Measure to return to the measurement screen.
D.O. concentration (HI98194, HI98196 only)
Verify the barometric pressure, conductivity and temperature
reading are correct. Calibrate them if necessary. To calibrate the
D.O. concentration range, a solution with known dissolved oxygen
concentration value is needed. The solutions used to calibrate
with, should be determined independently (for instance by
Winkler titration). Place the D.O. sensor with temperature sensor into the known solution.
• From the “DO calibration” menu, select the “DO concentration” option, insert the known
concentration. Allow the sensors to reach thermal equilibrium with the solution. Stir or agitate if
possible to keep fresh solution in front of the membrane and press OK.
• When the reading is stable, the stability timer will count down and Confirm will appear. Press
Confirm to accept the value.
• When the messages “Storing” and “Calibration completed” appear, the calibration is completed.
To return to the “Calibration” menu, press OK.
• To return to the main menu, press ESC twice.
To Next Page
Loading...
Need help?
General
