LaMotte DO 6 Dissolved Oxygen Meter - Manual (Page 40)

7.8.2 Salinity Setting Adjustment
Note: This mode is available only from
the mg/L (ppm) Concentration Set Up
menu.
1. Repeat steps 1 to 5 as in the steps
of Pressure Setting Adjustment.
2. Press the HOLD/ENTER key twice
till the meter displays the Salinity
setting mode “b.SAL”.
3. Press the HOLD/ENTER key to
enter the Salinity setting mode.
4. Use the
p and q keys to enter the
salinity of your solution in ppt.
Note: The salinity value is in ppt (parts
per thousand)
5. Press HOLD/ENTER key to
confirm the value. A confirmation
indicator “CO” will be displayed for
1.5 seconds before returning to the
subgroup menu “DPr.7”.
6. Press CAL key to return to the
measurement mode.
8 PROBE CARE AND MAINTENANCE
The DO 6 probe is a galvanic measuring element which produces an output
proportional to the oxygen present in the medium in which it is placed. The
galvanic probe design lets you take measurements immediately – without the
typical 15 minute wait of other dissolved oxygen probes.
The probe consists of two parts:
· An upper part consisting of the anode, a cathode, and the dual cable.
· A lower part consisting of a pre-membraned cap, and electrolyte solution.
Oxygen diffuses through the membrane onto the cathode, where it is
consumed. This process produces an electrical current which flows through the
cable to the meter. The electric current produced is proportional to the oxygen
that passes through the membrane and the layer of electrolyte. This makes it
39
.sal
HOLD
ENTER
HOLD
ENTER
0.0
45.2
co
“CO” will display
for 1.5 seconds
Display will return back to “DPr.7”
subgroup menu
Figure29: Salinity Setting Adjustment Sequence