Hanna Instruments HI 8410 User Manual

Page 12

AUTO mode

The dosage is activated and deactivated
according with the selected setpoint. The
corresponding DOSAGE MODE LED is off.
Be sure that the DOSAGE switch is in AUTO
position when the meter is in normal
operating mode.

ON mode

The dosage is always activated. The
corresponding DOSAGE MODE LED blinks.

INITIAL PREPARATION & INSTALLATION
Material needed:

• a 3-wire power cable to connect HI 8410

OPERATIONAL GUIDE

Ensure the controller has been calibrated. Ensure the DO probe is
immersed in the sample to be tested.
The DO reading can be displayed in % air saturation or in ppm (mg/L)
according to the range selection. The corresponding LED is ON.
For accurate dissolved oxygen measurements a water flow of at least
5-7 cm/sec is required. In this way a constant replenishment of the
oxygen-depleted membrane surface is ensured.
Accurate readings are not possible in still water.
Note: For some particular applications, such as fish farming, the

membrane can be sterilized with stabilized iodine (20 to 50

ppm), typically used for this purpose.

Note: For use in harsh environments, it is recommended to protect

the membrane with the optional HI 76409-0 sleeve. The
response time will slightly slow down.