Specifications

Instruction Manual Alpha DO 500
11
3. Normal Operation
3.1 Measurement mode
When the DO Transmitter is powered on, the display shows all the LCD
segments briefly, and then automatically enters into the Measurement mode.
%
MEAS
ATC
°C
READY
25.0
99.0
The mode indicator ‘MEAS’ at the top of the display indicates that the
Transmitter is in Measurement mode. The upper alpha-numerical display
shows the measured dissolved oxygen value, while the lower display shows
the temperature value. The indicator “%”, “ppm” or “mg/l” at the upper right
side of the display indicates the current measurement mode. (Refer section
5.2 for switching measurement modes)
NOTE:
To guarantee accurate readings, the measuring system (the DO
Transmitter and the sensor) must be calibrated regularly.
From measurement mode you can access:
x Calibration mode (by pressing CAL key)
x Setup mode (by pressing ENT key)
For more details, refer section 4 for Calibration mode and section 5 for Setup
mode.)