Instruction Manual
Alpha DO 500
19
Press ENT key
to confirm the reading.
NOTES:
x
The transmitter proceeds to the second point of calibration
if the displayed reading is less than 10%
x
The transmitter does not accept the calibration and shows
calibration error if the displayed (measured) value is more
than 10%
4
If the 0% calibration is successful, the Transmitter proceeds to the
second point. The lower display shows ‘
100.0
’. Take the electrode out of
0% oxygen solution, rinse in clean water, dry it and then allow the
electrode to equilibrate in air. The upper display shows the measured
value of dissolved oxygen saturation. Allow the reading to stabilize. LCD
shows ‘
READY
’ annunciator when the reading is stable.
Press ENT key
to confirm the reading.
NOTE:
The transmitter does not accept the calibration and shows
calibration error if the displayed (measured) value is not with
50% to 150%
5
5
The calibration is completed. The DO Transmitter reverts to
measurement mode.
NOTES:
x
If the displayed value is more than
r
10% of the high-point value, the
Transmitter indicates a calibration error by showing ‘
ERR
’ and blinking
electrode annunciator. If this happens,
press
and keys
together
to return to measurement mode. Restart the calibration from Step1
x
To exit from calibration mode without confirming calibration, press
and keys together
x
When calibrating with manual temperature compensation, the
Transmitter automatically changes from preset ‘process temperature’ to
‘calibration temperature’. After leaving calibration mode, the transmitter
switches back to the ‘process temperature’ (Refer section 5.4 for
temperature settings)
