26
Operation
5. Select CALIBRATE and confirm.
6. Select SAMPLE CAL. Select the available Output Mode (Active, Hold, or Transfer)
from the list box and confirm.
7. The display will show “Press
ENTER when Stabilized” and the current DO and
temperature readings. When the reading has been confirmed or when the reading has
been accepted as stable, the display will change to an entry screen. If
ENTER is not
pressed, the sensor will determine when the reading is stable. Two to three minutes
for the reading to stabilize is typical, however, if it has not stabilized after 45 minutes,
the display will show “Unable to Calibrate”.
8. When a stable reading has been accepted, the display will show “Sample Cal” and an
area for entry of the value obtained from the Winkler Titration.
9. Change the displayed reading to match the hand-held DO analyzer memory.
10. After calibration, one of the responses in Table 5 on page 26 will be displayed.
5.6.4 Concurrent Calibration of Two Sensors
1. Begin a calibration on the first sensor and proceed when “Wait to Stabilize” is
displayed.
2. Select the
BACK arrow, then LEAVE. The display will return to the Main Measurement
screen.
3. Begin the calibration for the second sensor and continue until “Wait to Stabilize” is
displayed.
4. Select the
BACK arrow, then LEAVE. The display will return to the Main Measurement
screen and the reading for both sensors will be flashing.
5. To return to the calibration of either sensor, select the Main Menu button. Select
SENSOR SETUP and confirm. Select the appropriate sensor and confirm
.
6. The calibration in progress will be displayed. Continue with the calibration.
Table 5 Calibration Response
Calibration Response Explanation
Cal Complete Indicates the Calibration is complete.
Cal Fail, Offset HIgh
Indicates the air calibration has failed due to an excessively high calculated gain value. Repeat the
calibration.
Cal Fail, Offset Low
Indicates the air calibration has failed due to too low of a calculated gain value. Repeat the
calibration.
Cal Fail, Unstable
Indicates the air calibration has failed because the readings did not stabilize during the maximum
allowed calibration time interval. Repeat the calibration.
To Next Page
Loading...
