6
Sample/MODE-
Press and hold for 3 seconds to switch between
continuous and manual measurement modes.
Press and release to restart the measurement when
in manual mode. Continuous mode: the instrument
will continuously update the dissolved oxygen
measurement. Manual mode: the instrument will
update the DO reading until reaching a stable
measurement. The stable measurement will be
‘locked’ on the display until the user initiates a new
measurement
reading
by
pressing
the
“Sample/MODE”
key.
THE LSDO PROBE
A. Probe
Throughout the manual, the term “probe” refers to the end of the
cable where the sensor is located, the term “sensor” refers to the
Light Sensing Dissolved Oxygen sensing portion of the cable/probe
assembly, and the term “sensor cap” refers to the removable
sensing cap that is replaced about once per year (Figure 4).
Figure 4: Probe
B. Preparing the Probe
Each 9031M sensor cap has unique calibration coefficients
associated with it. These coefficients are labeled on the instruction
sheet included with each 9031M cable/probe assembly and
replacement 9031M sensor cap.
Remove the probe/cable assembly from the shipping container and
locate the sensor cap instruction sheet. Be sure to save the
